FAQ

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

Autoklaver

  • Lara (1)
    • Warning about consumable replacement.
      POSSIBLE CAUSE
      A consumable needs to be replaced.
      SOLUTION
      Order the requested consumable (door seal, dust filter, bacteriological filter) and replace it. See the chapter “Maintenance” in the Instructions for Use.
  • Lisa (29)
    • Warning about consumable replacement.
      POSSIBLE CAUSE
      A consumable needs to be replaced.
      SOLUTION
      Order the requested consumable (door seal, dust filter, bacteriological filter) and replace it. See the chapter “Maintenance” in the Instructions for Use.
    • Instruments are turning brown or black.
      POSSIBLE CAUSE
      Incorrect temperature selected
      SOLUTION
      Select a sterilization cycle featuring a lower sterilization temperature. Follow the instructions of the instrument manufacturer.
    • No cycles are stored in the cycle history menu
      POSSIBLE CAUSE
      An electronic board was replaced when serviced.
      SOLUTION
      None. The memory of the old board cannot be restored. You are advised to Save the history regularly onto the USB pen drive.
    • 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.
      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 for interference between the door and the chamber furniture and/or the load.
    • The sterilizer enters into “Standby mode” immediately after being switched on
      POSSIBLE CAUSE
      The unit was turned off while in standby mode.
      SOLUTION
      Press the standby mode button to exit.
    • 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, contact an authorized W&H service partner
    • Warning about saving to the USB (HTML and SCL files)
      POSSIBLE CAUSE
      The USB mass storage is disconnected or full.
      SOLUTION
      Check presence and condition of the USB pen drive. If the problem persist, contact an authorized W&H service partner
    • Warning about programmed maintenance.
      POSSIBLE CAUSE
      The maintenance program needs to be carried out.
      SOLUTION
      Contact an authorized W&H service partner.
    • The cycle report printer does not work.
      POSSIBLE CAUSE
      Printer not properly connected or not powered.
      SOLUTION
      Check the data and power connection to the printer.
    • Lisa 17/22
      What is the maximum noise level of the sterilizer?
      The smooth running noise at a pleasant maximum level of 58.5 dB(A) ensures a high comfort working environment.
    • 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 building electrical supply.

      POSSIBLE CAUSE
      The power cord is not connected properly.
      SOLUTION
      Check and connect the power cord properly
    • 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 door surface facing the chamber.

      POSSIBLE CAUSE
      Internal leak.
      SOLUTION
      Contact an authorized W&H service partner.
    • The cycle commences but there is no rise in pressure/temperature
      POSSIBLE CAUSE
      The safety thermostat is open.
      SOLUTION
      Reset the safety thermostat (see chapter “Reset the safety thermostat” in the Instructions for Use).

      POSSIBLE CAUSE
      Electric/electronic fault
      SOLUTION
      Contact an authorized W&H service partner.
    • Should I pouch/wrap my instruments and how long can I store them after sterilization?
      To ensure that your instruments are stored in a sterile state from their successful sterilization until they are used, W&H recommends wrapping them in suitable sterile barrier systems before sterilization. The recommended storage period can be found in the recommendations of the wrapping material manufacturer. For further information, please contact your dealer.
    • Should I call the service station before sending equipment for repair?
      If you are not sure what the cause of the problem is, it is better to call the service station and talk to a technician. Together with the technician it can be determined what needs to be sent in and sometimes it is possible to even solve the problem right away.
    • Do I need to carry out periodic testing on my Lisa/Lina/Lara?
      Lisa/Lina/Lara 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 testing procedure carried out by an official authority, proving the effectiveness of your sterilizer. Compulsories and frequency of validation are regulated by local/national guidelines.
    • What periodic tests do I need to carry out on my Lisa/Lina/Lara sterilizer?
      Country/regional specific laws and guidelines referring to periodical testing or routine monitoring are individual and must be considered. Our recommendation for periodical testing is mentioned in the delivered IFU and depends on the integrated features in your sterilizer.
    • Do I need to document the results of all periodic tests?
      W&H recommends recording all periodic tests, repairs and modifications on the sterilizer in a logbook including date and signature of the person who carried out the test or other activity. Compulsories of recording is regulated by local/national guidelines.
    • How long should I archive the documentation of regular tests?
      Keep the results according to your country/regional specific laws and guidelines. Those records can be of assistance in case of service as well.
    • Does my sterilizer need any periodic qualification/validation?
      Validation generally comprises a range of tests defined in internationally recognised standards. These tests begin for every device with the factory tests at W&H. In addition, corresponding documentation is included with your device. Prior to commissioning the device at your premises, the technician performs further checks to ensure the device functions correctly. Then, depending on the national/regional laws and directives, the device must be subjected to a so-called renewed performance qualification at regular intervals. For further information, please contact your dealer.
    • Whom should I get to validate and maintain my sterilizer?
      Validation shall be carried out by an official authority. Maintenance tasks shall be carried out by a qualified and authorised technician.
    • 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 (only for Lisa); • in the Consumables & Accessories and Video Tutorial section of this web site
    • Which water quality should I use for my sterilizer?
      Answer: 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 jeopardized. Consequently, only water with conductivity of less than 15 µS/cm should be used for your W&H sterilizer. The Multidem system is especially suited to preparing suitable water (see chapter “Water quality” in the Instructions for Use).
    • 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.
    • At the end of the cycle the display reads “Open the door” but it is not possible to open the door.
      : POSSIBLE CAUSE
      The chamber is still under pressure due to an internal malfunction.
      SOLUTION
      Unplug the sterilizer and wait at least three hours: this releases any internal pressure allowing the chamber door to be opened. Then retry. Call service if the problem persists.

      POSSIBLE CAUSE
      The bacteriological filter is blocked.
      SOLUTION
      Remove the bacteriological filter to release the pressure. Replace the filter (see the chapter “400-cycle maintenance – Replacing the bacteriological filter” in the Instructions for Use). Note that bacteriological filters need to be replaced every 400 cycles.
    • 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 that 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
      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 good quality water (see APPENDIX 7).

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

      POSSIBLE CAUSE
      Scale deposits on the chamber
      SOLUTION
      Clean the chamber and use good quality water (refer to APPENDIX 7).
    • How do I clean the water tanks and what products should I use?
      Information and videos relating to the cleaning of the water tanks and cleaning products can be found on the Video Tutorial section of this web site.

Tilbehør

Håndstykke

Laboratorie motorer

Trådløs endomotor

Hånd- og vinkelstykker

Vedligeholdelsesudstyr

  • Assistina TWIN (7)
    • Which processing steps are carried out in the Assistina TWIN?
      • Cleaning the spray channels with W&H Activefluid
      • Lubricating the rotating parts with W&H Service Oil
      • Throughout the maintenance process, potentially contaminated aerosols are extracted from the process chamber and the exhaust air is cleaned using a HEPA filter.
    • 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. The HPI adaptor can be used for the Assistina TWIN instead.
    • Why does the Assistina TWIN have a HEPA filter?
      During the maintenance process in the Assistina TWIN, 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 law 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 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).
    • 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.
    • Why is there no rotational lubrication option in the Assistina TWIN?
      The oil is atomized in the Assistina TWIN before it is 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: the results of a maintenance operation correspond to those achieved with the Assistina 301 Plus.

Vandbehandling

  • Multidem (2)
    • Should I call the service station before sending equipment for repair?
      If you are not sure what the cause of the problem is, it is better to call the service station and talk to a technician. Together with the technician it can be determined what needs to be sent in and sometimes it is possible to even solve the problem right away.
    • Which water quality should I use for my sterilizer?
      Answer: 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 jeopardized. Consequently, only water with conductivity of less than 15 µS/cm should be used for your W&H sterilizer. The Multidem system is especially suited to preparing suitable water (see chapter “Water quality” in the Instructions for Use).
  • Osmo (2)
    • Should I call the service station before sending equipment for repair?
      If you are not sure what the cause of the problem is, it is better to call the service station and talk to a technician. Together with the technician it can be determined what needs to be sent in and sometimes it is possible to even solve the problem right away.
    • Which water quality should I use for my sterilizer?
      Answer: 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 jeopardized. Consequently, only water with conductivity of less than 15 µS/cm should be used for your W&H sterilizer. The Multidem system is especially suited to preparing suitable water (see chapter “Water quality” in the Instructions for Use).

Hånd- og vinkelstykker

Kirurgiske save

Protetik skruemaskine

Kirurgi maskiner

  • Piezomed (7)
    • How does it work to wirelessly control the Implantmed and the Piezomed?
      W&H introduces a new concept in oral surgery and implantology. Via dongles (receiver), which can be connected to the unit by the doctor, the wireless foot control S-NW communicates with the surgical units of W&H.wireless foot control
    • How long is the useful service life of the instrument detection?
      The instrument detection is located in the LED socket and is automatically replaced at the same time as the LED socket.
    • How long is the useful service life of the LED?
      The user must replace the LED socket as soon as the protective coating on the LED discolours and the luminous power is impaired as a result. The length of time this takes can differ depending on the type of steriliser or sterilization process.
    • 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
    • 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 and 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
    • How are the 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.
    • Can third-party instruments be used on the Piezomed?
      No
      a. Different thread
      b. The Piezomed instrument detection cannot detect third-party instruments

Luftscaler

Hånd- og vinkelstykker

Ozon generator

Luft Motor

Koblinger

Elektrisk motor

Hånd- og vinkelstykker

Turbiner

Trådløse enheder

Tilbehør

Tilbehør

  • 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 so called 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 partner
      The sale of SmartPegs will be defined per country
      The surgeon will receive 5 free SmartPegs. A voucher will be provided with the delivery of the product.
    • 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, SI-1015 and SI-1010 can be upgraded with the W&H Osstell ISQ module
    • Can the surgeon upgrade the unit by themself or does the unit need technical service?
      The surgeon or dental nurse can easily attach the module 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 Instrumenter (4)
    • 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
    • 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 and 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
    • How are the 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.
    • Can third-party instruments be used on the Piezomed?
      No
      a. Different thread
      b. The Piezomed instrument detection cannot detect third-party instruments