FAQ

Frequently asked questions on W&H products and helpful descriptions on the topic of hygiene and maintenance.

Surgical Devices

Straight & Contra-angle Handpieces

Couplings

Accessories

Turbines

Implant stability measurement

  • Osstell Beacon (2)
    • What does ISQ stand for?
      The abbreviation ISQ stands for Implant Stability Quotient. It is a value between 1 and 100 and gives the surgeon an insight of the implant stability after placing the implant. With the ISQ value the surgeon can monitor the osseointegration.
    • Where can I buy the SmartPegs?
      Please contact your local W&H UK partner
      A voucher will be included with any unit purchased, enabling the purchaser to request 5 free SmartPegs.

Cordless Devices

Air Scaler

Accessories

  • W&H Osstell ISQ module (7)
    • What does ISQ stand for?
      The abbreviation ISQ stands for Implant Stability Quotient. It is a value between 1 and 100 and gives the surgeon an insight of the implant stability after placing the implant. With the ISQ value the surgeon can monitor the osseointegration.
    • How does the measurement of the ISQ work?
      > To measure the ISQ of an implant, you first screw a 'SmartPeg' into the placed implant. The SmartPeg, with its magnet on top, works like a small tuning fork. The magnet on the SmartPeg is ‘hit’ with magnetic pulses, from the probe, which makes the SmartPeg vibrate. Due to the stiffness in the interface between the implant surface and the bone the SmartPeg will vibrate accordingly. The more dense the bone is the higher stability and the higher ISQ value.
      isq scale
    • Where can I buy the SmartPegs?
      Please contact your local W&H UK partner
      A voucher will be included with any unit purchased, enabling the purchaser to request 5 free SmartPegs.
    • Is the ISQ scientifically proven?
      The Osstell ISQ technology is proven by over 700 scientific studies. These studies have shown, that torque and ISQ correlate.
    • What’s the difference between torque and ISQ?
      Torque is a one time, static measurement at the time of placement of the implant and cannot be repeated later on in a non-invasive way. Osstell ISQ measures the lateral stability of the implant and the measurements can be repeated in a non-invasive, dynamic way to monitor the development of osseointegration.
    • Is every new Implantmed compatible with the W&H Osstell ISQ module?
      Yes. All control units SI-1023 can be upgraded with the W&H Osstell ISQ module
    • Can the Implantmed unit be upgraded by the surgeon or does it require a technical specialist?
      The module is easily attached to the right side of the Implantmed with the help of the provided quick manual. The module is plug-n-play via a USB connection.Implantmed with ISQ model comparison
  • Piezomed Instruments (4)
    • Can third-party instruments be used on the Piezomed?
      No
      a. Different thread
      b. The Piezomed instrument detection cannot detect third-party instruments
    • How are instruments prepared for cleaning?
      a. Preparation in the ultrasonic bath:
      - Place the instruments in the instrument tray and lower into the ultrasonic bath.
      - Use cleaning agents and disinfectants suitable for hand instruments (probes, mirrors, forceps, etc.).
      DO NOT USE a bur bath, as this is very aggressive.
      - After cleaning in the ultrasonic bath, rinse adequately with water to remove any remnants of the cleaning agent and disinfectant from the coolant channels.
      - Blow dry with compressed air after rinsing
      - Replace dried instruments in the instrument tray and package for sterilization

      b. Mechanical preparation in the cleaning unit and disinfector
      - Use the cleaning adapter for cleaning units and disinfectors (see Instructions for Use – Accessories)
      - After preparation in the cleaning unit and disinfector, check that the coolant channels are dry and, if necessary, dry again with compressed air.
    • How long do the instruments last and when should they be replaced?
      The useful service life of the instruments is determined by the length of time they are used reprocessing. Sterilization cycles have only marginal influence.
      a. Instruments need to be replaced
      - If there is a loss of power while working
      - Where there is visible damage on the working part or the shank of the instrument.
      b. Saws must be replaced if
      - Teeth are broken off
      - Teeth are worn
      c. Diamond-coated instruments must be replaced
      - As soon as the diamond coating is worn
    • Can Piezomed instruments also be used on third-party devices?
      No
      a. Different thread
      b. Third-party device cannot find the correct resonance point – instrument fails to oscillate

Oral Surgery & Implantology

Electric Motor

Reprocessing Devices

  • Assistina TWIN (6)
    • Why is there no rotational lubrication option in the Assistina TWIN?
      The oil is atomized in the Assistina TWIN before it enters the instrument. This ensures full coverage of the gear parts but eliminates the need for technically complex and time-consuming rotational lubrication. There is no negative impact on the quality of maintenance with the high level results corresponding to those achieved using the Assistina 301 Plus.
    • What instrument adaptors are available for the Assistina TWIN?
      All adaptors that are suitable for the Assistina 3x2/3x3 can also be used in the Assistina TWIN. There is only one exception: the RM/ISO adaptor for the Assistina 3x2/3x3 is not compatible with the Assistina TWIN. Quick Connect adaptors ISO and RM can be used for the Assistina TWIN instead. An overview of all adaptors is available on the product website.
    • What does HEPA mean, and what is filtered out of the air?
      HEPA is short for 'High Efficiency Particular Air', and the filter is classified as HEPA class E11. This means that the filter retains all particles larger than 1 µm, which includes, among other things, a wide range of bacteria and viruses, suspended particles such as dust and respirable aerosols.
    • How often does the TWIN Care Set need to be replaced?
      The consumption volumes for each instrument are 0.07 ml of oil and 0.07 ml of cleaning solution. This gives a maximum capacity of 2857 cycles. In reality, the value is around 2800 to 2850 cycles, as initial filling is also required and the fill quantity of the cartridges is subject to certain tolerances that are regulated by the applicable standards.
    • How does the user know when the TWIN Care Set needs to be replaced?
      The intelligent process monitoring system documents the number of maintenance cycles that have been performed, thereby automatically calculating the number of instruments that can be serviced with the remaining quantity of fluid. The user receives an alert 300 cycles before the cartridge needs replacing (the oil and cleaner LEDs on the top of the unit turn yellow in colour).
    • Why does the Assistina TWIN have a HEPA filter?
      During the Assistina TWIN's handpiece maintenance process the rotating parts are lubricated with oil and the spray channels rinsed with cleaning solution. These liquids are introduced to the handpieces using compressed air, which produces aerosols that may contain potentially contaminated body fluids (e.g. blood and saliva). In order to ensure that the apparatus poses no risk to the user, the patient or third parties, aerosols must be prevented from leaking out of the apparatus. We make sure of this by using active suction and the HEPA filter. This HEPA filter needs to be changed regularly, which is why the lifespan of the filter is matched exactly to the capacity of the two cartridges. The HEPA filter therefore needs changing every time that the refill cartridge set is replaced.
  • Assistina ONE (8)
    • Why does the Assistina One have a HEPA filter?
      During the maintenance process in the Assistina One, the rotating parts are lubricated with oil, and the spray channels rinsed with cleaning solution. These liquids are introduced to the handpieces using compressed air, which produces aerosols that may contain potentially contaminated body fluids (e.g. blood and saliva). In order to ensure that the apparatus poses no risk to the user, the patient or third parties, the legislation stipulates that aerosols must be prevented from leaking out of the apparatus. We make sure of this by using active suction and the HEPA filter. This HEPA filter must of course be changed regularly, which is why the lifespan of the filter is matched exactly to the capacity of the two cartridges. The HEPA filter therefore reaches the end of its service life once one set of cartridges has been used.
    • What does HEPA mean, and what is filtered out of the air?
      HEPA is short for 'High Efficiency Particular Air', and the filter is classified as HEPA class E11. This means that the filter retains all particles larger than 1 µm, which includes, among other things, a wide range of bacteria and viruses, suspended particles such as dust and respirable aerosols.
    • How does the user know when the ONE Care Set needs to be replaced?
      The ONE Care Set must be replaced when the cartridges are empty. The levels can be checked thanks to the device's fill level indicators, located on the right and left sides.
    • What instrument adaptors are available for the Assistina One?
      All adaptors that are suitable for the Assistina 3x2/3x3 can also be used in the Assistina One. There is only one exception: the RM/ISO adaptor for the Assistina 3x2/3x3 is not compatible with the Assistina One. Quick Connect adaptors ISO and RM can be used for the Assistina One instead. An overview of all adaptors is available in the product website.
    • Why there is no rotational lubrication option in the Assistina One?
      The oil is atomized in the Assistina One before it enters the instrument. This ensures full coverage of the gear parts, eliminating the need for technically complex and time-consuming rotational lubrication. However, there is no negative impact on the maintenance quality.
    • What is the difference between oil nebulization and rotational lubrication?
      Final result is the same, but in a shorter time. In the nebulization system, oil is nebulized in the adaptor before it is blown into the handpiece. An oil mist coats all gear parts.
    • How do you replace the ONE Care Set?
      The two cartridges and the filter can be changed easily without any tools. The fluid is supplied via tapping needles in the bottom of the cartridge spaces that penetrate the cartridge membrane, thereby drawing the fluid out of the cartridge. The two cartridges have different shapes to ensure that the two fluid types cannot be mixed up. In addition, it is only possible to install the HEPA filter incorrectly by using force, which is not necessary.
    • How often does the ONE Care Set needs to be replaced?
      The consumption volumes for each instrument are 0.07 ml of oil and 0.07 ml of cleaning solution. This gives a maximum capacity of 2857 cycles. The value is around 2800 to 2850 cycles, as initial filling is also required and the fill quantity of the cartridges is subject to certain tolerances that are regulated by the applicable standards.
  • ThermoKlenz (9)
    • How do I de-scale my ThermoKlenz?
      Information and videos relating to de-scaling your ThermoKlenz can be found on the Video Tutorial section of this web site.
    • Who should I use to carry out validation and maintenance on my ThermoKlenz?
      All validation and maintenance should be undertaken by the Competent Person (Decontamination) or Competent Person (maintenance).
    • Does my ThermoKlenz need to be commissioned from new?
      Yes, validation is needed for new equipment at installation and annually thereafter. It will also be necessary to validate equipment after any major repairs have been carried out.
    • Do I need to carry out periodic testing on my ThermoKlenz?
      Yes, testing is an integral part of ensuring that a small sterilizer consistently performs to operating parameters set during the machines commissioning. Failure to carry out routine periodic tests and maintenance tasks could compromise safety and have legal and insurance-related implications for the registered Manager.
    • Can I process all handpieces in my ThermoKlenz?
      No, only instruments which have the thermal disinfection symbol can be processed, check with the manufacturer that a washer-disinfector can be used to clean the handpiece.
    • What periodic tests do I need to carry out on my ThermoKlenz?
      Periodic testing is set out in the current national decontamination guildance document. In addition to a daily automatic control test and weekly safety inspection, other periodic tests should be performed by the operator or user and will normally consist of: - Protein Residue Test - Cleaning Efficacy Test (Residual Soil Detection Test) Additional information relating to these tests and how to carry out these tests can be found on the Video Guides section of this web site.
    • What is validation?
      Validation is a series of tests carried out with the use of independent specialist test equipment, as is necessary to demonstrate that the physical conditions required for sterilization, thermal disinfection and/or cleaning (i.e. temperature, pressure, time) are achieved.
    • Do I need to document the results of all periodic tests?
      Yes, all tests performed by the operator or user should be recorded in a logbook with the date and signature of the individual how carried out the test. Every Sterilizer and every thermo washer disinfector should have a logbook (file) in which test details pertaining to the lifecycle of the equipment (from purchase - disposal) are recorded. A logbook is provided as standard with the Premium Careplus Service Contract from W&H, or as an optional extra with the Premium Care Service Contract.
    • How long should I Keep periodic test records?
      Under current national decontamination guildance, all audit documents should be stored for at least two years and they should not be removed from the premises or destroyed.

Intraosseous Injection

  • Anesto (27)
    • Rupture of the mucosa.
      Rupture of the mucosa depends on the characteristics of the mucous membranes. Thin mucous membranes will be easier to distend or lightly rupture than thick mucosa. In addition, you should be mindful of the effects of needle rotation. The needle torque goes against the slackness of the adjacent mucous membrane area. Therefore you need to start the motor with a speed of at least 15,000 rpm up to a maximum of 25,000 rpm. Always make sure that no soft start occurs; the mucous membranes and the cortical bone must be penetrated with full torque right from the start, otherwise there is increased risk of the needle becoming clogged and the gums being torn by the rotating contact surfaces. Carefully press the intraosseous injection needle through the attached mucosa and place it upright on the bone.
    • Does penetration through the cortical bone hurt and is the anaesthetic application painful?
      No, penetration, i.e. drilling through the cortical bone, is not painful. If the anaesthetic is applied carefully with the pumping mechanism, this process is also completely pain-free. Giving too large a dose of anaesthetic can lead to a reflux of anaesthetic, because the tissue simply cannot absorb this.
    • Can surface bacteria spread into the tissue?
      A pre-operative prophylaxis is a procedure worth considering not only from a business point of view, but also because this stage leads to better pre-operative hygiene conditions, in addition to the standard pre-operative use of Chlorhexamed 0.1% or 0.2%, which alone reduces bacteria by a factor of 5,000. Creating fully sterile conditions in the oral cavity pre-operatively is wishful thinking and has nothing to do with reality. There are two known ways of managing the risk of an intraoral intervention responsibly. The first is to reduce the bacterial count through a pre-intervention prophylactic and intraoral rinsing for 2-3 minutes using a 0.1% or 0.2% Chlorhexamed rinse. The second is to use a single shot dose of antibiotics for the whole body. This recommendation is primarily aimed at oral surgical interventions. Normal preserving, prosthetic and also endodontic interventions do not require this level of risk management.Intraligamentary, infiltration and conduction anaesthesia also do not require any non-standard safeguards. If you consult the literature on this subject, the risk of infection after an intraoral injection when immune status is normal can be reckoned to be quite low. The only exception is in patients who require endocarditis prophylaxis as prescribed by an internist. (Kneist E. »Plaquekontrolle mit Chlorhexidin ZWR« – Das Deutsche Zahnärzteblatt 2011; 120 (4) page 156 – 167)
    • Do we need a new cannula for each patient?
      The injection cannulas are single-use products, firstly due to the risk of infection and secondly because re-use in a second drilling process is not possible due to the needle changes that occur.
    • Do you have to use a new cannula for a new injection site?
      Due to the risk of reflux of bacteria, blood components, etc. when the cannula is withdrawn, a new unused cartridge must always be used. The needle becomes deformed and could close up or fracture if it is used a second time. On our recommendation, the manufacturer of Anesto has included several protective caps and connectors in the kit. In cases where several types of injection must be given to the patient, this can be done quickly without any problem using a second pre-prepared system.
    • Broken needle
      This situation is not without risk, especially if the needle has already been pushed deep through the cortical bone. Known cases occurred before penetrating the cortical bone and, therefore, removal was simple using tweezers. If the needle suddenly disappears into the mucous membranes, references are needed so you can orientate yourself in three dimensions. CPGM biteblocks which you have prepared yourself with a metal sphere as reference (defined diameter) and recorded in two planes on an X-ray enable orientation and a targeted approach to the removal procedure.
    • Aspiration option using the Anesto handpiece.
      If you following the application guidelines, you will successfully inject into the spongiosa. It is unlikely that you will hit a larger blood vessel (e.g. N. alveolaris inferior). Please study the clinical handbook once again, as the injection sites are described here.
    • Incomplete anaesthesia
      Classic anaesthesia failure can, of course, also be observed with IOA when the inflammation and associated shifts in pH-values are substantial enough.
    • Risk of damaging a vessel.
      If you select the right injection site, the nerve and vascular bundle is rarely affected; it is more common to affect the nutritive vessels which are narrow in diameter and therefore unproblematic. The spongiosa have a good blood supply and respond immediately to the anaesthetic. Therefore there should be no intensive secondary bleeding.
    • Risk of damaging a tooth root.
      Before selecting the injection site, please consider the shape of the tooth, the angle of the tooth and then the tooth x-ray to avoid damaging the periodontal tissue or the tooth root. In extreme cases, you may meet great resistance. You must immediately carry out another accurate check of the injection site.
    • If you are dealing with a small amount of anaesthetic, do you have to change the cartridge with this system?
      We have already addressed the risk of infection under the question about »changing cannulas«. Setting aside the fact that anaesthetic has a worldwide price of between 18 and 50 eurocents, there is the risk that blood and bacteria can run back into the needle when you withdraw it. Studies have shown that a vacuum appears at the rubber penetration (rubber fastener) for a fraction of a second at the moment of removal, which can effectively suck some of the material from the needle into the cartridge (Source: Walter Gräf in »Aktuelle Aspekte der Lokalanästhesie« September 1984, published by Firma Hoechst, author Prof. Dr.Dr. Walter Hoffmann-Axthelm, Freiburg im Breisgau, page 147).
    • How do you charge for Anesto?
      It is important to explain to the patient that this form of anaesthesia has a high probability of success in every respect. Neither the new German dental fee schedule (GOZ) nor BEMA have a specific position on charging. In the German dental fee scale (GOÄ), something quite different is meant by bone puncture and intraosseous infusion. However, the new GOZ offers enough room for manoeuvre thanks to paragraph 2 and sub-paragraphs, so an agreement can be made in the range of EUR 25-40. Anaesthetics and cannula tips are invoiced as consumables.
    • Does thermal necrosis occur with intraosseous anaesthesia? General risk of necrosis?
      If the speed is too high (> 25,000 rpm) or too much pressure is used, tissue necrosis can occur as a result of heat generation. However, this can be kept to a minimum by working intermittently. Because the absorption speed is around 1 drop/second, the injection should be administered very slowly. Injection pressure that is too great and an injection medium concentration that is too high carry the risk of rupture and necrosis to the tissue.
    • Post-operative side effects (a feeling of numbness in the tongue or lip, paresthesia, secondary bleeding)
      No adverse effects have yet been reported. It is important to observe the contraindications so the number of adverse effects reported remains small. Follow the instructions for use, leave yourself time and do not experiment.
    • We know from the recognized anaesthesia procedures that anaesthesia can fail. What is the success rate with Anesto?
      In the period from February 2010 to January 2011, we surveyed a total of 532 patients after first clarifying with them that they would be happy for us to anaesthetize them using Anesto. After the treatment, we asked them to tell us how they felt the desensitisation had worked. Patients were selected at random and participation in our study took place on a voluntary basis. There was no pre-selection based on injection areas, gender, age distribution or diagnosis. 478 patients were evaluated and we reported a success rate of 97%.
    • Can you implement intraosseous anaesthesia in every area of bone or are there problem areas?
      We should not forget that sensory suppression only applies to nerve structures or receptor areas – that is, just the periosteum area where there is the greatest density of receptors, along the desmodontal structures and in the areas around the nerves. The cortical bone, for example, is not innervated and so pain cannot be registered here. Therefore there is no need to suppress pain here. The injection should be made at the height of the transitional zones in the region of the middle lower root third. This is where the root structures start becoming narrower but there is still a large enough gap to the serious anatomical structures, such as the N. alveolaris inferior and the sinus maxillaris. The area between the lower premolars can be considered as a relative contraindication, because vessels can be punctured here and painful haematomas caused.
    • Anaesthetic leaks out of the handpiece
      If the needle is blocked (this can also occur if the needle is twisted) and pressure is put on the lever, anaesthetic can leak from the needle injection site into the cartridge and then onto the handpiece. Corrective action is to: check the flow through the needle and change the needle if necessary.
    • We know that when a tooth is extracted an injection should be used to numb various nerve structures. In the case, for example, of mandibular anaesthesia, it is expected that correct placement of the conduction anaesthesia should numb the N. mandibularis and the N. lingualis. How does that work with Anesto?
      Intraosseous anaesthesia primarily affects only the target area of the N. alveolaris. To affect the nourishment area of the N. lingualis, the use of a surface anaesthetic is recommended. This is actually a separate treatment procedure, but nerve damage, as can occur with direct nerve puncture or application close to the nerve at N. mandibularis or N. lingualis, will not occur in future when taking this approach.
    • How does adrenaline affect blood flow in the spongiosa?
      Adrenaline in a concentration of 1:100,000 has optimal vasoconstrictor characteristics. The spongiosa themselves have a good blood supply, not least through the presence of bone marrow structures.
    • Anaesthetic emerges from the deep tissue along the needle.
      If the mucous membrane is very thin, the hole in the mucosa can become stretched and consequently there may be a reflux of anaesthetic if excessive injection pressure builds up during the infiltration phase. The situation in the spongy bone is different, but reflux is also possible if excessive injection pressure builds up. Please take your time. The absorption speed in the tissue is just a few drops per minute. Please remember that the anaesthetic is a drug and is slightly alkaline. The chemical aspect alone and in large concentrations can cause local tissue damage if the quantity is too large in too short a period. However, this is not particular to Anesto. The feel for careful application is required in all anaesthesia procedures. If the needle is not centred, it will wobble and the puncture hole will become larger. Then reflux is a certainty.
    • What effect does needle speed have?
      If the needle is inserted too slowly, the drill holes can expand in the highly cancellous area. If there is too little rotation, the spongiosa are compressed. A high speed makes a jagged »rupture« in the spongiosa, thus creating little or no compression or clogging. In order to prevent this, it is important to precisely follow the information provided in the treatment protocol and in the handbook. Guide the stationary injection needle in accordance with the selected access techniques in the direction of the periosteum/bone until contact is made with the bone. Only use a discreet amount of penetration pressure and immediately depress the footoperated switch completely in order to achieve the speed set immediately (15,000-25,000 rpm). The needle will work through the bone on its own. No soft start, Sotherwise there is increased risk of the needle becoming clogged and the gums being torn by the rotating contact surfaces. Note: the drill hole in the cortical bone centres the needle. Our drill procedures should last for max. 3 seconds. The drill regions should be neither expanded nor jagged.
    • Should the injection pressure be memorized and what injection speed should be used?
      The injection pressure should be built up by slowly pumping the lever over a period of several minutes. This means the anaesthetic flows out better and there are no effects to vital systems, e.g. raised pulse. If too much is injected into an area, it will inevitably flow back. Slowly inject the anaesthetic into the spongiosa by repeatedly and carefully pressing the dosage lever. At least 10 seconds per injection are recommended. Therefore a total of 2-3 minutes should be scheduled for this treatment stage. Because the absorption speed is around 1 drop/second, the first injections should be administered very slowly. Too much injection pressure and too great a concentration of injection medium carry the risk of tissue rupture and necrosis.
    • Anaesthetic cannot be injected because the needle is blocked. What needs to be done? What can the person performing the treatment do to avoid the needle becoming clogged?
      Using a non-rotating approach to perforating the bone or working at low revs can lead to the cannula becoming clogged with blood and pieces of bone. You should, therefore, avoid turning the device on too slowly and pressing down too hard in the first seconds of application. On the other hand, this problem can also be caused by a mechanical change to the needle point. When using Anesto, we have observed warping from 0 to 360°, which means a considerable restriction in the lumen at the needle point. If greater pressure is required on the dosage lever or if this lever cannot be pressed down, then the intraosseous injection needle is blocked and injection is not possible. Remove the intraosseous injection needle from the needle clamping device, replace it with a new one and repeat the process. The argument against the use of the initial drill hole is just that you have to locate it again. In the time you spend searching or the old perforation has expanded, you can create a new access point.
    • Can I also use standard needles? What is different about the intraosseous injection needles?
      A standard cannula cannot meet the requirements for perforating bone. The needle specially developed for this system has a special cutting guide and a defined length-diameter ratio so it can withstand the rotational forces. Use in a clinical setting shows that the cannulas show deformations of up to 360°.
    • Can the Anesto system be sterilized?
      Yes, it not only can but must be prepared in a thermo washer disinfector and then sterilized in accordance with recognized standards.
    • What conditions are required for intraosseous anaesthesia?
      Intraosseous anaesthesia relies on the spongiosa being in good working order, so the anaesthetic can diffuse to the place where it is required.
    • Is palatal application also possible or sensible?
      We always inject from the vestibular side. A palatal application is subject to your own discretion and the responsibility of the person performing the treatment, but we do not recommend it. For patients who are sensitive to pain, a palatal/lingual surface anaesthetic can be used in addition (gels are particularly effective here), meaning palatal/lingual penetration can be avoided. The palate is shaped like a Gothic arch, particularly in the case of patients with narrow faces. If there is not sufficient palate height, certain areas cannot be treated using Anesto. In these cases, a topical anaesthetic is required.

Restoration & Prosthetics

Cordless Devices

Air polisher

Straight & Contra-angle Handpieces

Cleaning & Disinfection Agents

  • BePro (5)
    • Are there pathogens more resistant than mycobacteria?
      Yes, the most difficult pathogens to eliminate are spores and prions, for to eliminate of which it is necessary to resort to the use of the autoclave for sterilization.
    • Are all disinfectants the same?
      Disinfectants are not all the same, there are many different types based on their formulation and the active principle(s) contained therein.
    • How do I choose the right disinfectant for my practice?
      Depending on the categories of pathogenic microorganisms on which the disinfectant is effective, different levels of disinfection are distinguished; high, intermediate and low. In order to ensure total safety in the practice, for both patients and operators, the choice of disinfectant to be used must always fall on a product that ensures a high level of disinfection.
    • What are the main aspects I have to consider when choosing a disinfectant?
      There are three fundamental aspects that must always be considered when choosing a disinfectant: the desired efficacy, i.e. the ability of the product to be active on a wide range of pathogens, the expected efficiency, i.e. the ability of the product to reach its maximum effectiveness in the shortest possible time and, in the case of concentrated products, with the lowest possible concentration and finally the necessary compatibility, i.e. the possibility of using the product without the risk of damaging, destroying or invalidating its use of the tool or surface to be treated.
    • Are all pathogens equally resistant to disinfectants?
      No, pathogens have very different resistances depending on the disinfectant substance used to try to eliminate them. The least resistant pathogens range from the encapsulated viruses up to mycobacteria, which are instead the most resistant and require a high level of disinfection to eliminate them.

Accessories

  • Seal2 (1)
    • Should I pre-wrap and how long can I store my instruments after sterilization?
      Under current UK decontamination guidance, with a type B vacuum cycle, instruments should be pre-wrapped and once sterilized can be stored for up to 12 months. Wrapping should take place shortly after washing and disinfection. Under current UK decontamination guidance, with a type N cycle, instruments should not be pre-wrapped. Once sterilized, instruments can be immediately aseptically wrapped and stored for up to 12 months. Instruments should always be dry before they are placed in the purpose-designed packaging.

Water Treatment Devices

  • Osmo (1)
    • What water quality should I use with my Lisa/Lina?
      The water quality for sterilizers is internationally specified by standards and directives. The reasons for this are that your sterilizer can be seriously damaged by it or the sterilization can be jeopardised. Consequently, only water with conductivity of less than 10 µS/cm in North America and 15 µS/cm for the rest of the world should be used for your W&H sterilizer. The Water treatment devices Multidem and Osmo are especially designed to prepare suitable water (see chapter “Water quality” in the Instructions for Use).

Straight & Contra-angle Handpieces

Piezo Scaler

Sterilizers

  • MS Sterilizer (3)
    • How often should I de-scale my Thermoklenz?
      Water hardness can differ depending of the region in which the unit is located. Carrying out a water hardness test will enable you to gauge how hard the incoming water is. The frequency of de-scaling cycles will depend on the water hardness and the number of cycles run per week. W&H recommends that at least one de-scaling cycle be run each week. More frequent de-scaling cycles should be run if the washer disinfector has a heavier workload or if the water is hard. Additional information relating to these tests and how to carry out these tests can be found on the Video Tutorial section of this web site.
    • What is validation?
      Validation is a series of tests carried out with the use of independent specialist test equipment, as is necessary to demonstrate that the physical conditions required for sterilization, thermal disinfection and/or cleaning (i.e. temperature, pressure, time) are achieved.
    • Do I need to document the results of all periodic tests?
      Yes, all tests performed by the operator or user should be recorded in a logbook with the date and signature of the individual how carried out the test. Every Sterilizer and every thermo washer disinfector should have a logbook (file) in which test details pertaining to the lifecycle of the equipment (from purchase - disposal) are recorded. A logbook is provided as standard with the Premium Careplus Service Contract from W&H, or as an optional extra with the Premium Care Service Contract.
  • Lara (24)
    • Do I need to carry out periodic testing on my Lisa/Lara/Lina/Lyla/Lexa?
      Lisa/Lara/Lina/Lyla/Lexa features test cycles (B&D/Helix test, Vacuum test). Compulsory and frequency of testing are regulated by local/national guidelines.
    • What is validation?
      Validation is a series of tests carried out with the use of independent specialist test equipment, as is necessary to demonstrate that the physical conditions required for sterilization, thermal disinfection and/or cleaning (i.e. temperature, pressure, time) are achieved.
    • Do I need to document the results of all periodic tests?
      Yes, all tests performed by the operator or user should be recorded in a logbook with the date and signature of the individual how carried out the test. Every Sterilizer and every thermo washer disinfector should have a logbook (file) in which test details pertaining to the lifecycle of the equipment (from purchase - disposal) are recorded. A logbook is provided as standard with the Premium Careplus Service Contract from W&H, or as an optional extra with the Premium Care Service Contract.
    • What water quality should I use with my Lisa/Lina?
      The water quality for sterilizers is internationally specified by standards and directives. The reasons for this are that your sterilizer can be seriously damaged by it or the sterilization can be jeopardised. Consequently, only water with conductivity of less than 10 µS/cm in North America and 15 µS/cm for the rest of the world should be used for your W&H sterilizer. The Water treatment devices Multidem and Osmo are especially designed to prepare suitable water (see chapter “Water quality” in the Instructions for Use).
    • How do I clean the water tanks and what products should I use?
      Water tank cleaning instructions are provided in the Instructions for Use, chapter “Maintenance”. In addition, a video description is available: • in the sterilizer, in the maintenance section of the menu; • in the Consumables & Accessories and Video Tutorial section of this website.
    • How do I change consumable components on my sterilizer?
      Consumable replacement instructions are provided in the Instructions for Use, chapter “Maintenance”. In addition, a video description is available: • in the sterilizer, in the maintenance section of the menu; • in the Consumables & Accessories and Video Tutorial section of this website.
    • Who should I use to carry out validation and maintenance on my Lisa/Lina?
      All validation and maintenance should be undertaken by the Competent Person (Decontamination) or Competent Person (maintenance).
    • Does my Lisa/Lina need to be commissioned from new?
      Yes, validation is needed for new equipment at installation and annually thereafter. It will also be necessary to validate equipment after any major repairs have been carried out.
    • How long should I Keep periodic test records?
      Under current national decontamination guildance, all audit documents should be stored for at least two years and they should not be removed from the premises or destroyed.
    • Should I pre-wrap and how long can I store my instruments after sterilization?
      Under current UK decontamination guidance, with a type B vacuum cycle, instruments should be pre-wrapped and once sterilized can be stored for up to 12 months. Wrapping should take place shortly after washing and disinfection. Under current UK decontamination guidance, with a type N cycle, instruments should not be pre-wrapped. Once sterilized, instruments can be immediately aseptically wrapped and stored for up to 12 months. Instruments should always be dry before they are placed in the purpose-designed packaging.
    • Lisa 17/22
      At the end of the cycle, there is residual water in the chamber
      POSSIBLE CAUSE
      Sterilizer not properly levelled
      SOLUTION
      Properly level the surface the sterilizer is placed on.

      POSSIBLE CAUSE
      Overloaded chamber
      SOLUTION
      Comply with the maximum load weight limits for each type of load. Always use the chamber rack for trays and cassettes.

      POSSIBLE CAUSE
      Chamber filter clogged
      SOLUTION
      Remove and clean the chamber filter.

      POSSIBLE CAUSE
      Chamber filter cap mispositioned
      SOLUTION
      Mount the chamber filter cap properly (see chapter MAINTENANCE)

      POSSIBLE CAUSE
      Load incorrectly placed
      SOLUTION
      Follow the recommendations as listed in ANNEX 2.
    • Lisa 17/22
      When starting a cycle, the chamber door locks but re-opens immediately. The “Open the door” message appears.
      POSSIBLE CAUSE
      Door seal not properly placed; seal sticking out
      SOLUTION
      Ensure that the door seal is correctly inserted around the whole circumference.

      POSSIBLE CAUSE
      Door jammed by external objects or by the load itself
      SOLUTION
      Remove any objects interfering with the chamber door. Check that the door does not push against the load or the chamber furniture.
    • Lisa 17/22
      The sterilizer enters into “Sleep mode” immediately after opening the chamber door.
      POSSIBLE CAUSE
      The chamber door has not been opened after the previous cycle had finished and the “Sleep mode delay” has expired
      SOLUTION
      Press the SLEEP MODE button to exit”.
    • Lisa 17/22
      The sterilizer remains switched OFF.
      POSSIBLE CAUSE
      The main switch or network circuit breaker is OFF
      SOLUTION
      Activate the main switch or network circuit breaker (ON).

      POSSIBLE CAUSE
      No voltage at the socket
      SOLUTION
      Check the electric circuit.

      POSSIBLE CAUSE
      The power cord is not connected properly
      SOLUTION
      Check and connect the power cord properly.
    • Lisa 17/22
      Water is leaking at the front of the sterilizer
      POSSIBLE CAUSE
      Leaks through the chamber door seal
      SOLUTION
      Clean or replace the door seal. Clean the chamber face side.

      POSSIBLE CAUSE
      Internal leak.
      SOLUTIONS
      Call technical service.
    • Lisa 17/22
      No cycles are stored in the cycle history menu
      POSSIBLE CAUSE
      An electronic board was replaced by service.
      SOLUTION
      None. The memory of the old board cannot be restored. Save periodically the history on the USB pen drive.
    • Lisa 17/22
      Corrosion or spots on instruments
      POSSIBLE CAUSE
      Tap water on instruments when placed in the sterilizer
      SOLUTION
      Ensure that instruments are dry before they are placed in the sterilizer.

      POSSIBLE CAUSE
      Use of water of poor quality or water containing chemical substances
      SOLUTION
      Drain both water tanks. Use water of good quality (see ANNEX 7).

      POSSIBLE CAUSE
      Organic or chemical residues on the instruments
      SOLUTION
      Clean, rinse and dry instruments before placing them in the sterilizer (see ANNEX 2).

      POSSIBLE CAUSE
      Chamber, trays, tray rack dirty
      SOLUTION
      Clean the chamber and wash the chamber furniture

      POSSIBLE CAUSE
      Contact between instruments of different materials
      SOLUTION
      Ensure that instruments of different materials do not touch (aluminum, carbon or stainless steel, etc.); place them on different trays or cassettes or pouch them (refer to ANNEX 2).

      POSSIBLE CAUSE
      Scale deposits on the chamber
      SOLUTION
      Clean the chamber and use water of good quality (refer to ANNEX 7).
    • Warning about saving to the USB (HTML and SCL files).
      The USB drive is disconnected or full. SOLUTION Check presence and condition of the USB drive. If the problem persists, contact an authorised W&H service partner.
    • Lisa 17/22
      The cycle report printer does not work.
      POSSIBLE CAUSE
      Printer not properly connected or not powered
      SOLUTION
      Check the data and the power connection to the printer.
    • Lisa 17/22
      When the sterilizer is connected to an automated water supply system: there is no clean water in the tank, but the automatic water filling does not fill the water.
      POSSIBLE CAUSE
      Water fill system not connected
      SOLUTION
      Connect the water fill system to the sterilizer (see ANNEX 7 for water quality requirements).

      POSSIBLE CAUSE
      When the water fill system attempted to fill the tank, water was temporarily unavailable
      SOLUTION
      Since water tank filling is attempted only once in-between cycle execution, this event inhibits water feeding. Switch the sterilizer OFF and then ON again.
      Check the external water supply system.
      Check for water leaks from the sterilizer.

      POSSIBLE CAUSE
      Faulty MIN water level sensor in the clean water tank
      SOLUTION
      Call service.
    • Lisa 17/22
      The sterilization (PROCESS) phase of a sterilization cycle was longer than expected.
      POSSIBLE CAUSE
      The chamber temperature dropped below the minimum threshold and the software performed a successful recovery
      SOLUTION
      Wait for cycle completion. If the problem occurs frequently, call technical service.
    • Lisa 17/22
      Warning about programmed maintenance.
      POSSIBLE CAUSE
      A component shall be replaced for the programmed maintenance of the sterilizer.
      SOLUTION
      Call service to order the requested component (door seal, dust filter, bacteriological filter...). See “Maintenance” chapter..
    • What should I do if I get a Warning about consumable replacement?
      Order the requested consumable (door seal and HEPA/bacteriological filter) and replace it. See the chapter “Maintenance” in the Instructions for Use.
    • What is the maximum noise level of the Lara, Lara XL and Lexa Plus sterilizer?
      The maximum noise level of Lara is 66.9 dB and the Lara XL/Lexa Plus are 70 dB.
  • Lina (24)
    • Do I need to carry out periodic testing on my Lisa/Lara/Lina/Lyla/Lexa?
      Lisa/Lara/Lina/Lyla/Lexa features test cycles (B&D/Helix test, Vacuum test). Compulsory and frequency of testing are regulated by local/national guidelines.
    • How often should I de-scale my Thermoklenz?
      Water hardness can differ depending of the region in which the unit is located. Carrying out a water hardness test will enable you to gauge how hard the incoming water is. The frequency of de-scaling cycles will depend on the water hardness and the number of cycles run per week. W&H recommends that at least one de-scaling cycle be run each week. More frequent de-scaling cycles should be run if the washer disinfector has a heavier workload or if the water is hard. Additional information relating to these tests and how to carry out these tests can be found on the Video Tutorial section of this web site.
    • What is validation?
      Validation is a series of tests carried out with the use of independent specialist test equipment, as is necessary to demonstrate that the physical conditions required for sterilization, thermal disinfection and/or cleaning (i.e. temperature, pressure, time) are achieved.
    • Do I need to document the results of all periodic tests?
      Yes, all tests performed by the operator or user should be recorded in a logbook with the date and signature of the individual how carried out the test. Every Sterilizer and every thermo washer disinfector should have a logbook (file) in which test details pertaining to the lifecycle of the equipment (from purchase - disposal) are recorded. A logbook is provided as standard with the Premium Careplus Service Contract from W&H, or as an optional extra with the Premium Care Service Contract.
    • What water quality should I use with my Lisa/Lina?
      The water quality for sterilizers is internationally specified by standards and directives. The reasons for this are that your sterilizer can be seriously damaged by it or the sterilization can be jeopardised. Consequently, only water with conductivity of less than 10 µS/cm in North America and 15 µS/cm for the rest of the world should be used for your W&H sterilizer. The Water treatment devices Multidem and Osmo are especially designed to prepare suitable water (see chapter “Water quality” in the Instructions for Use).
    • How do I clean the water tanks and what products should I use?
      Water tank cleaning instructions are provided in the Instructions for Use, chapter “Maintenance”. In addition, a video description is available: • in the sterilizer, in the maintenance section of the menu; • in the Consumables & Accessories and Video Tutorial section of this website.
    • How do I change consumable components on my sterilizer?
      Consumable replacement instructions are provided in the Instructions for Use, chapter “Maintenance”. In addition, a video description is available: • in the sterilizer, in the maintenance section of the menu; • in the Consumables & Accessories and Video Tutorial section of this website.
    • Who should I use to carry out validation and maintenance on my Lisa/Lina?
      All validation and maintenance should be undertaken by the Competent Person (Decontamination) or Competent Person (maintenance).
    • Does my Lisa/Lina need to be commissioned from new?
      Yes, validation is needed for new equipment at installation and annually thereafter. It will also be necessary to validate equipment after any major repairs have been carried out.
    • How long should I Keep periodic test records?
      Under current national decontamination guildance, all audit documents should be stored for at least two years and they should not be removed from the premises or destroyed.
    • Should I pre-wrap and how long can I store my instruments after sterilization?
      Under current UK decontamination guidance, with a type B vacuum cycle, instruments should be pre-wrapped and once sterilized can be stored for up to 12 months. Wrapping should take place shortly after washing and disinfection. Under current UK decontamination guidance, with a type N cycle, instruments should not be pre-wrapped. Once sterilized, instruments can be immediately aseptically wrapped and stored for up to 12 months. Instruments should always be dry before they are placed in the purpose-designed packaging.
    • Lisa 17/22
      At the end of the cycle, there is residual water in the chamber
      POSSIBLE CAUSE
      Sterilizer not properly levelled
      SOLUTION
      Properly level the surface the sterilizer is placed on.

      POSSIBLE CAUSE
      Overloaded chamber
      SOLUTION
      Comply with the maximum load weight limits for each type of load. Always use the chamber rack for trays and cassettes.

      POSSIBLE CAUSE
      Chamber filter clogged
      SOLUTION
      Remove and clean the chamber filter.

      POSSIBLE CAUSE
      Chamber filter cap mispositioned
      SOLUTION
      Mount the chamber filter cap properly (see chapter MAINTENANCE)

      POSSIBLE CAUSE
      Load incorrectly placed
      SOLUTION
      Follow the recommendations as listed in ANNEX 2.
    • Lisa 17/22
      When starting a cycle, the chamber door locks but re-opens immediately. The “Open the door” message appears.
      POSSIBLE CAUSE
      Door seal not properly placed; seal sticking out
      SOLUTION
      Ensure that the door seal is correctly inserted around the whole circumference.

      POSSIBLE CAUSE
      Door jammed by external objects or by the load itself
      SOLUTION
      Remove any objects interfering with the chamber door. Check that the door does not push against the load or the chamber furniture.
    • Lisa 17/22
      The sterilizer enters into “Sleep mode” immediately after opening the chamber door.
      POSSIBLE CAUSE
      The chamber door has not been opened after the previous cycle had finished and the “Sleep mode delay” has expired
      SOLUTION
      Press the SLEEP MODE button to exit”.
    • Lisa 17/22
      The sterilizer remains switched OFF.
      POSSIBLE CAUSE
      The main switch or network circuit breaker is OFF
      SOLUTION
      Activate the main switch or network circuit breaker (ON).

      POSSIBLE CAUSE
      No voltage at the socket
      SOLUTION
      Check the electric circuit.

      POSSIBLE CAUSE
      The power cord is not connected properly
      SOLUTION
      Check and connect the power cord properly.
    • Lisa 17/22
      Water is leaking at the front of the sterilizer
      POSSIBLE CAUSE
      Leaks through the chamber door seal
      SOLUTION
      Clean or replace the door seal. Clean the chamber face side.

      POSSIBLE CAUSE
      Internal leak.
      SOLUTIONS
      Call technical service.
    • Lisa 17/22
      No cycles are stored in the cycle history menu
      POSSIBLE CAUSE
      An electronic board was replaced by service.
      SOLUTION
      None. The memory of the old board cannot be restored. Save periodically the history on the USB pen drive.
    • Lisa 17/22
      Corrosion or spots on instruments
      POSSIBLE CAUSE
      Tap water on instruments when placed in the sterilizer
      SOLUTION
      Ensure that instruments are dry before they are placed in the sterilizer.

      POSSIBLE CAUSE
      Use of water of poor quality or water containing chemical substances
      SOLUTION
      Drain both water tanks. Use water of good quality (see ANNEX 7).

      POSSIBLE CAUSE
      Organic or chemical residues on the instruments
      SOLUTION
      Clean, rinse and dry instruments before placing them in the sterilizer (see ANNEX 2).

      POSSIBLE CAUSE
      Chamber, trays, tray rack dirty
      SOLUTION
      Clean the chamber and wash the chamber furniture

      POSSIBLE CAUSE
      Contact between instruments of different materials
      SOLUTION
      Ensure that instruments of different materials do not touch (aluminum, carbon or stainless steel, etc.); place them on different trays or cassettes or pouch them (refer to ANNEX 2).

      POSSIBLE CAUSE
      Scale deposits on the chamber
      SOLUTION
      Clean the chamber and use water of good quality (refer to ANNEX 7).
    • Warning about saving to the USB (HTML and SCL files).
      The USB drive is disconnected or full. SOLUTION Check presence and condition of the USB drive. If the problem persists, contact an authorised W&H service partner.
    • Lisa 17/22
      The cycle report printer does not work.
      POSSIBLE CAUSE
      Printer not properly connected or not powered
      SOLUTION
      Check the data and the power connection to the printer.
    • Lisa 17/22
      When the sterilizer is connected to an automated water supply system: there is no clean water in the tank, but the automatic water filling does not fill the water.
      POSSIBLE CAUSE
      Water fill system not connected
      SOLUTION
      Connect the water fill system to the sterilizer (see ANNEX 7 for water quality requirements).

      POSSIBLE CAUSE
      When the water fill system attempted to fill the tank, water was temporarily unavailable
      SOLUTION
      Since water tank filling is attempted only once in-between cycle execution, this event inhibits water feeding. Switch the sterilizer OFF and then ON again.
      Check the external water supply system.
      Check for water leaks from the sterilizer.

      POSSIBLE CAUSE
      Faulty MIN water level sensor in the clean water tank
      SOLUTION
      Call service.
    • Lisa 17/22
      Warning about programmed maintenance.
      POSSIBLE CAUSE
      A component shall be replaced for the programmed maintenance of the sterilizer.
      SOLUTION
      Call service to order the requested component (door seal, dust filter, bacteriological filter...). See “Maintenance” chapter..
    • LINA PRO13-003
      What is the maximum noise level of the sterilizer?
      The maximum noise level of 66.5 dB(A) guarantees a quiet working environment.
    • What should I do if I get a Warning about consumable replacement?
      Order the requested consumable (door seal and HEPA/bacteriological filter) and replace it. See the chapter “Maintenance” in the Instructions for Use.
  • Lyla (24)
    • Do I need to carry out periodic testing on my Lisa/Lara/Lina/Lyla/Lexa?
      Lisa/Lara/Lina/Lyla/Lexa features test cycles (B&D/Helix test, Vacuum test). Compulsory and frequency of testing are regulated by local/national guidelines.
    • What is validation?
      Validation is a series of tests carried out with the use of independent specialist test equipment, as is necessary to demonstrate that the physical conditions required for sterilization, thermal disinfection and/or cleaning (i.e. temperature, pressure, time) are achieved.
    • Do I need to document the results of all periodic tests?
      Yes, all tests performed by the operator or user should be recorded in a logbook with the date and signature of the individual how carried out the test. Every Sterilizer and every thermo washer disinfector should have a logbook (file) in which test details pertaining to the lifecycle of the equipment (from purchase - disposal) are recorded. A logbook is provided as standard with the Premium Careplus Service Contract from W&H, or as an optional extra with the Premium Care Service Contract.
    • What water quality should I use with my Lisa/Lina?
      The water quality for sterilizers is internationally specified by standards and directives. The reasons for this are that your sterilizer can be seriously damaged by it or the sterilization can be jeopardised. Consequently, only water with conductivity of less than 10 µS/cm in North America and 15 µS/cm for the rest of the world should be used for your W&H sterilizer. The Water treatment devices Multidem and Osmo are especially designed to prepare suitable water (see chapter “Water quality” in the Instructions for Use).
    • How do I clean the water tanks and what products should I use?
      Water tank cleaning instructions are provided in the Instructions for Use, chapter “Maintenance”. In addition, a video description is available: • in the sterilizer, in the maintenance section of the menu; • in the Consumables & Accessories and Video Tutorial section of this website.
    • How do I change consumable components on my sterilizer?
      Consumable replacement instructions are provided in the Instructions for Use, chapter “Maintenance”. In addition, a video description is available: • in the sterilizer, in the maintenance section of the menu; • in the Consumables & Accessories and Video Tutorial section of this website.
    • Who should I use to carry out validation and maintenance on my Lisa/Lina?
      All validation and maintenance should be undertaken by the Competent Person (Decontamination) or Competent Person (maintenance).
    • Does my Lisa/Lina need to be commissioned from new?
      Yes, validation is needed for new equipment at installation and annually thereafter. It will also be necessary to validate equipment after any major repairs have been carried out.
    • How long should I Keep periodic test records?
      Under current national decontamination guildance, all audit documents should be stored for at least two years and they should not be removed from the premises or destroyed.
    • Should I pre-wrap and how long can I store my instruments after sterilization?
      Under current UK decontamination guidance, with a type B vacuum cycle, instruments should be pre-wrapped and once sterilized can be stored for up to 12 months. Wrapping should take place shortly after washing and disinfection. Under current UK decontamination guidance, with a type N cycle, instruments should not be pre-wrapped. Once sterilized, instruments can be immediately aseptically wrapped and stored for up to 12 months. Instruments should always be dry before they are placed in the purpose-designed packaging.
    • Lisa 17/22
      At the end of the cycle, there is residual water in the chamber
      POSSIBLE CAUSE
      Sterilizer not properly levelled
      SOLUTION
      Properly level the surface the sterilizer is placed on.

      POSSIBLE CAUSE
      Overloaded chamber
      SOLUTION
      Comply with the maximum load weight limits for each type of load. Always use the chamber rack for trays and cassettes.

      POSSIBLE CAUSE
      Chamber filter clogged
      SOLUTION
      Remove and clean the chamber filter.

      POSSIBLE CAUSE
      Chamber filter cap mispositioned
      SOLUTION
      Mount the chamber filter cap properly (see chapter MAINTENANCE)

      POSSIBLE CAUSE
      Load incorrectly placed
      SOLUTION
      Follow the recommendations as listed in ANNEX 2.
    • Lisa 17/22
      When starting a cycle, the chamber door locks but re-opens immediately. The “Open the door” message appears.
      POSSIBLE CAUSE
      Door seal not properly placed; seal sticking out
      SOLUTION
      Ensure that the door seal is correctly inserted around the whole circumference.

      POSSIBLE CAUSE
      Door jammed by external objects or by the load itself
      SOLUTION
      Remove any objects interfering with the chamber door. Check that the door does not push against the load or the chamber furniture.
    • Lisa 17/22
      The sterilizer enters into “Sleep mode” immediately after opening the chamber door.
      POSSIBLE CAUSE
      The chamber door has not been opened after the previous cycle had finished and the “Sleep mode delay” has expired
      SOLUTION
      Press the SLEEP MODE button to exit”.
    • Lisa 17/22
      The sterilizer remains switched OFF.
      POSSIBLE CAUSE
      The main switch or network circuit breaker is OFF
      SOLUTION
      Activate the main switch or network circuit breaker (ON).

      POSSIBLE CAUSE
      No voltage at the socket
      SOLUTION
      Check the electric circuit.

      POSSIBLE CAUSE
      The power cord is not connected properly
      SOLUTION
      Check and connect the power cord properly.
    • Lisa 17/22
      Water is leaking at the front of the sterilizer
      POSSIBLE CAUSE
      Leaks through the chamber door seal
      SOLUTION
      Clean or replace the door seal. Clean the chamber face side.

      POSSIBLE CAUSE
      Internal leak.
      SOLUTIONS
      Call technical service.
    • Lisa 17/22
      No cycles are stored in the cycle history menu
      POSSIBLE CAUSE
      An electronic board was replaced by service.
      SOLUTION
      None. The memory of the old board cannot be restored. Save periodically the history on the USB pen drive.
    • Lisa 17/22
      Corrosion or spots on instruments
      POSSIBLE CAUSE
      Tap water on instruments when placed in the sterilizer
      SOLUTION
      Ensure that instruments are dry before they are placed in the sterilizer.

      POSSIBLE CAUSE
      Use of water of poor quality or water containing chemical substances
      SOLUTION
      Drain both water tanks. Use water of good quality (see ANNEX 7).

      POSSIBLE CAUSE
      Organic or chemical residues on the instruments
      SOLUTION
      Clean, rinse and dry instruments before placing them in the sterilizer (see ANNEX 2).

      POSSIBLE CAUSE
      Chamber, trays, tray rack dirty
      SOLUTION
      Clean the chamber and wash the chamber furniture

      POSSIBLE CAUSE
      Contact between instruments of different materials
      SOLUTION
      Ensure that instruments of different materials do not touch (aluminum, carbon or stainless steel, etc.); place them on different trays or cassettes or pouch them (refer to ANNEX 2).

      POSSIBLE CAUSE
      Scale deposits on the chamber
      SOLUTION
      Clean the chamber and use water of good quality (refer to ANNEX 7).
    • Warning about saving to the USB (HTML and SCL files).
      The USB drive is disconnected or full. SOLUTION Check presence and condition of the USB drive. If the problem persists, contact an authorised W&H service partner.
    • Lisa 17/22
      The cycle report printer does not work.
      POSSIBLE CAUSE
      Printer not properly connected or not powered
      SOLUTION
      Check the data and the power connection to the printer.
    • Lisa 17/22
      When the sterilizer is connected to an automated water supply system: there is no clean water in the tank, but the automatic water filling does not fill the water.
      POSSIBLE CAUSE
      Water fill system not connected
      SOLUTION
      Connect the water fill system to the sterilizer (see ANNEX 7 for water quality requirements).

      POSSIBLE CAUSE
      When the water fill system attempted to fill the tank, water was temporarily unavailable
      SOLUTION
      Since water tank filling is attempted only once in-between cycle execution, this event inhibits water feeding. Switch the sterilizer OFF and then ON again.
      Check the external water supply system.
      Check for water leaks from the sterilizer.

      POSSIBLE CAUSE
      Faulty MIN water level sensor in the clean water tank
      SOLUTION
      Call service.
    • Lisa 17/22
      The sterilization (PROCESS) phase of a sterilization cycle was longer than expected.
      POSSIBLE CAUSE
      The chamber temperature dropped below the minimum threshold and the software performed a successful recovery
      SOLUTION
      Wait for cycle completion. If the problem occurs frequently, call technical service.
    • Lisa 17/22
      Warning about programmed maintenance.
      POSSIBLE CAUSE
      A component shall be replaced for the programmed maintenance of the sterilizer.
      SOLUTION
      Call service to order the requested component (door seal, dust filter, bacteriological filter...). See “Maintenance” chapter..
    • Which is the maximum noise level of Lyla?
      The max. noise level of Lyla is 65.5 dB.
    • What should I do if I get a Warning about consumable replacement?
      Order the requested consumable (door seal and HEPA/bacteriological filter) and replace it. See the chapter “Maintenance” in the Instructions for Use.
  • Lisa (26)
    • Do I need to carry out periodic testing on my Lisa/Lara/Lina/Lyla/Lexa?
      Lisa/Lara/Lina/Lyla/Lexa features test cycles (B&D/Helix test, Vacuum test). Compulsory and frequency of testing are regulated by local/national guidelines.
    • How often should I de-scale my Thermoklenz?
      Water hardness can differ depending of the region in which the unit is located. Carrying out a water hardness test will enable you to gauge how hard the incoming water is. The frequency of de-scaling cycles will depend on the water hardness and the number of cycles run per week. W&H recommends that at least one de-scaling cycle be run each week. More frequent de-scaling cycles should be run if the washer disinfector has a heavier workload or if the water is hard. Additional information relating to these tests and how to carry out these tests can be found on the Video Tutorial section of this web site.
    • What is validation?
      Validation is a series of tests carried out with the use of independent specialist test equipment, as is necessary to demonstrate that the physical conditions required for sterilization, thermal disinfection and/or cleaning (i.e. temperature, pressure, time) are achieved.
    • Do I need to document the results of all periodic tests?
      Yes, all tests performed by the operator or user should be recorded in a logbook with the date and signature of the individual how carried out the test. Every Sterilizer and every thermo washer disinfector should have a logbook (file) in which test details pertaining to the lifecycle of the equipment (from purchase - disposal) are recorded. A logbook is provided as standard with the Premium Careplus Service Contract from W&H, or as an optional extra with the Premium Care Service Contract.
    • What water quality should I use with my Lisa/Lina?
      The water quality for sterilizers is internationally specified by standards and directives. The reasons for this are that your sterilizer can be seriously damaged by it or the sterilization can be jeopardised. Consequently, only water with conductivity of less than 10 µS/cm in North America and 15 µS/cm for the rest of the world should be used for your W&H sterilizer. The Water treatment devices Multidem and Osmo are especially designed to prepare suitable water (see chapter “Water quality” in the Instructions for Use).
    • How do I clean the water tanks and what products should I use?
      Water tank cleaning instructions are provided in the Instructions for Use, chapter “Maintenance”. In addition, a video description is available: • in the sterilizer, in the maintenance section of the menu; • in the Consumables & Accessories and Video Tutorial section of this website.
    • How do I change consumable components on my sterilizer?
      Consumable replacement instructions are provided in the Instructions for Use, chapter “Maintenance”. In addition, a video description is available: • in the sterilizer, in the maintenance section of the menu; • in the Consumables & Accessories and Video Tutorial section of this website.
    • Who should I use to carry out validation and maintenance on my Lisa/Lina?
      All validation and maintenance should be undertaken by the Competent Person (Decontamination) or Competent Person (maintenance).
    • Does my Lisa/Lina need to be commissioned from new?
      Yes, validation is needed for new equipment at installation and annually thereafter. It will also be necessary to validate equipment after any major repairs have been carried out.
    • How long should I Keep periodic test records?
      Under current national decontamination guildance, all audit documents should be stored for at least two years and they should not be removed from the premises or destroyed.
    • Should I pre-wrap and how long can I store my instruments after sterilization?
      Under current UK decontamination guidance, with a type B vacuum cycle, instruments should be pre-wrapped and once sterilized can be stored for up to 12 months. Wrapping should take place shortly after washing and disinfection. Under current UK decontamination guidance, with a type N cycle, instruments should not be pre-wrapped. Once sterilized, instruments can be immediately aseptically wrapped and stored for up to 12 months. Instruments should always be dry before they are placed in the purpose-designed packaging.
    • Lisa 17/22
      At the end of the cycle, there is residual water in the chamber
      POSSIBLE CAUSE
      Sterilizer not properly levelled
      SOLUTION
      Properly level the surface the sterilizer is placed on.

      POSSIBLE CAUSE
      Overloaded chamber
      SOLUTION
      Comply with the maximum load weight limits for each type of load. Always use the chamber rack for trays and cassettes.

      POSSIBLE CAUSE
      Chamber filter clogged
      SOLUTION
      Remove and clean the chamber filter.

      POSSIBLE CAUSE
      Chamber filter cap mispositioned
      SOLUTION
      Mount the chamber filter cap properly (see chapter MAINTENANCE)

      POSSIBLE CAUSE
      Load incorrectly placed
      SOLUTION
      Follow the recommendations as listed in ANNEX 2.
    • Lisa 17/22
      When starting a cycle, the chamber door locks but re-opens immediately. The “Open the door” message appears.
      POSSIBLE CAUSE
      Door seal not properly placed; seal sticking out
      SOLUTION
      Ensure that the door seal is correctly inserted around the whole circumference.

      POSSIBLE CAUSE
      Door jammed by external objects or by the load itself
      SOLUTION
      Remove any objects interfering with the chamber door. Check that the door does not push against the load or the chamber furniture.
    • Lisa 17/22
      The sterilizer enters into “Sleep mode” immediately after opening the chamber door.
      POSSIBLE CAUSE
      The chamber door has not been opened after the previous cycle had finished and the “Sleep mode delay” has expired
      SOLUTION
      Press the SLEEP MODE button to exit”.
    • Lisa 17/22
      The sterilizer remains switched OFF.
      POSSIBLE CAUSE
      The main switch or network circuit breaker is OFF
      SOLUTION
      Activate the main switch or network circuit breaker (ON).

      POSSIBLE CAUSE
      No voltage at the socket
      SOLUTION
      Check the electric circuit.

      POSSIBLE CAUSE
      The power cord is not connected properly
      SOLUTION
      Check and connect the power cord properly.
    • Lisa 17/22
      Water is leaking at the front of the sterilizer
      POSSIBLE CAUSE
      Leaks through the chamber door seal
      SOLUTION
      Clean or replace the door seal. Clean the chamber face side.

      POSSIBLE CAUSE
      Internal leak.
      SOLUTIONS
      Call technical service.
    • Lisa 17/22
      No cycles are stored in the cycle history menu
      POSSIBLE CAUSE
      An electronic board was replaced by service.
      SOLUTION
      None. The memory of the old board cannot be restored. Save periodically the history on the USB pen drive.
    • Lisa 17/22
      Corrosion or spots on instruments
      POSSIBLE CAUSE
      Tap water on instruments when placed in the sterilizer
      SOLUTION
      Ensure that instruments are dry before they are placed in the sterilizer.

      POSSIBLE CAUSE
      Use of water of poor quality or water containing chemical substances
      SOLUTION
      Drain both water tanks. Use water of good quality (see ANNEX 7).

      POSSIBLE CAUSE
      Organic or chemical residues on the instruments
      SOLUTION
      Clean, rinse and dry instruments before placing them in the sterilizer (see ANNEX 2).

      POSSIBLE CAUSE
      Chamber, trays, tray rack dirty
      SOLUTION
      Clean the chamber and wash the chamber furniture

      POSSIBLE CAUSE
      Contact between instruments of different materials
      SOLUTION
      Ensure that instruments of different materials do not touch (aluminum, carbon or stainless steel, etc.); place them on different trays or cassettes or pouch them (refer to ANNEX 2).

      POSSIBLE CAUSE
      Scale deposits on the chamber
      SOLUTION
      Clean the chamber and use water of good quality (refer to ANNEX 7).
    • Warning about saving to the USB (HTML and SCL files).
      The USB drive is disconnected or full. SOLUTION Check presence and condition of the USB drive. If the problem persists, contact an authorised W&H service partner.
    • Lisa 17/22
      The cycle report printer does not work.
      POSSIBLE CAUSE
      Printer not properly connected or not powered
      SOLUTION
      Check the data and the power connection to the printer.
    • Lisa 17/22
      When the sterilizer is connected to an automated water supply system: there is no clean water in the tank, but the automatic water filling does not fill the water.
      POSSIBLE CAUSE
      Water fill system not connected
      SOLUTION
      Connect the water fill system to the sterilizer (see ANNEX 7 for water quality requirements).

      POSSIBLE CAUSE
      When the water fill system attempted to fill the tank, water was temporarily unavailable
      SOLUTION
      Since water tank filling is attempted only once in-between cycle execution, this event inhibits water feeding. Switch the sterilizer OFF and then ON again.
      Check the external water supply system.
      Check for water leaks from the sterilizer.

      POSSIBLE CAUSE
      Faulty MIN water level sensor in the clean water tank
      SOLUTION
      Call service.
    • Lisa 17/22
      The sterilization (PROCESS) phase of a sterilization cycle was longer than expected.
      POSSIBLE CAUSE
      The chamber temperature dropped below the minimum threshold and the software performed a successful recovery
      SOLUTION
      Wait for cycle completion. If the problem occurs frequently, call technical service.
    • Lisa 17/22
      Warning about programmed maintenance.
      POSSIBLE CAUSE
      A component shall be replaced for the programmed maintenance of the sterilizer.
      SOLUTION
      Call service to order the requested component (door seal, dust filter, bacteriological filter...). See “Maintenance” chapter..
    • Lisa 17/22
      What is the maximum noise level of the sterilizer?
      The maximum running noise level of 58.5 dB(A)ensures a quiet, comfortable working environment.
    • What should I do if I get a Warning about consumable replacement?
      Order the requested consumable (door seal and HEPA/bacteriological filter) and replace it. See the chapter “Maintenance” in the Instructions for Use.
    • What is the maximum noise level of the Lisa sterilizer?
      The max. noise level of Lisa 2019 is 64.3 dB.