Innotec Dental
Best Products, Most professional in dental equipments
Innotec Dental



Contact information:

Foshan Innotec Dental Equipment Co., Ltd.

No.10, Hengguizhong Road, Luocun, Nanhai District, Foshan, Guangdong, China

Tel: +86-757-82223197

Fax: +86-757-82223197




Chat on MSN now! 

Skype:  My status

Position: Home > News > Information

Update on LED Curing Lights (part I)

Light-emitting diode light-curing(LED) units are now a mainstay of many general practice offices. These units are an effective choice for replacing alternative light sources such as quartztungsten-halogen (QTH) and high-intensity QTH units. LED units are lightweight, typically portable (battery-driven), effective, and in some circumstances able to outperform other light types with respect to unit durability and curing performance.


Ideal Features
* Compatible with variety of initiators (3rd-generation)
* Battery holds a charge for several hours of use - extra battery provided
* Sensor to indicate low battery
* Light tip 8-10mm in diameter
* Good ergonomics – lightweight
* Easily accessible controls
* Digital readout clearly displayed
* Probe is long enough (>7cm) to reach posterior surfaces
* Stable docking station/stand
* Autoclavable light tip or protective barrier
* Built-in radiometer
* Easy to disinfect


* Battery-powered
* Portable - compact, lightweight
* Energy efficient - long battery life
* Durable - diodes last 5000 hours


* Narrow spectral range - most units only work with CQ photo-initiator
* Heat generated in chip
* Heat generated at tip


The LED Source
LED chips used in dental light-curing units have not been specifically designed for dental use. Rather, the need for light-based communication, concentrated digital data storage, and large-screen video displays fueled the quest for a solid-state source that was “blue”.

Shortly after the introduction of these chips for other uses, it was found that the main output wavelengths of the blue LEDs serendipitously fell within a major absorption band of the most common photo-initiator used, camphorquinone (CQ). By activating CQ with power within its most abundant absorption range, the LED light proved to be more effective than a QTH, even though it generated a lower total power output.


Clinical Tips
* Minimize heat by having the assistant direct a stream of air or a high-volume vacuum over the tooth crown during light curing. Placing a wet cotton roll directly on the tooth crown opposite the side of exposure will also lessen temperature rise, but not to the same extent as when using air.
* Minimize direct exposure to light sources by use of effective “blueblocking” eyeglasses or shields for the clinician and the patient.
* Determine the loss of beam intensity with distance by holding the light guide at different distances from a dental curing radiometer. Curing potential of a restorative material is dependent on total energy received. Determine power at tip end, multiply that by the recommended exposure duration – the product is the light energy intensity delivered. When moving the tip away, measure that power level and divide it into the light energy intensity calculated above. The result will be the exposure duration needed to account for power loss with increasing distance.
* Evaluate a light’s heat dissipation capabilities by applying the longest sequence of typical exposure durations used in practice and determine if the unit shuts off or if heat greatly decreases during that time.
* Periodically evaluate the output of a light-curing unit with a radiometer to detect changes in intensity.

Previous:No Information  Next:The Role of Teeth Whitening is Changing (part II)