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LED in dental turbines – innovation of today
White, light emitting diode (LED) is the future for illuminating the operation site during treatment. Halogen bulbs in dental instruments are a thing of the past.
Since the end of 1970s, miniaturized halogen bulbs are implemented in dental instruments to illuminate the operation site during treatment. As known a bulb is a quite short-lived object. Vibration, sterilization, changing temperature and operating cycles are only some influences that can shorten its life-span significantly. And, although the color rendering index CRI is very good, the color temperature CCT is quite low. This means the emitted light has a yellowish tinge.
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Compare: halogen bulb (left) and light emitting diode LED (right).
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About life span, efficiency and illumination quality
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Because the bulb is placed in the backward region of the instrument optical fibers have to be used to lead the light to the emission site near the bur. As the light guide is made of glass sterilization influences its efficiency significantly and it can be damaged easily. Notwithstanding many improvements have been implemented the basic principle with all its benefits and disadvantages stayed the same until today.
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LED in daylight quality!
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To get rid of those drawbacks W&H was the first on the market to implement a completely new light source – the light emitting diode (LED) into its air driven turbines.
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equal to neutral white daylight
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One of the main advantages of the new technology is that its CCT is adjustable during the production process. This means that for the first time it is possible to offer a light source for dental instruments that is equal to neutral white daylight.
What’s more, W&H improved the CRI of the LED for white and yellowish colors. So, all relevant color information concerning dental application will appear correctly and in an unprecedented quality. These facts are approved by the Photonics Institute at the Vienna University of Technology and are published in Lighting Research & Technology (Sep. 2007). |
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Without a light guide
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Provided that the recommendations in the operating manual are carefully attended it should not be necessary to change the LED because of breakdown hence its life span is rated in years. Furthermore, because W&H was able to integrate the LED without a light guide the efficacy and the stability of the whole lightning system is improved.
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; "equal to neutral white daylight")
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