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Is the Higher the Intensity of Dental Curing Light, the Better the Curing Effect?

The higher the intensity of dental curing light, the better the curing effect? Dental curing light is a vital tool used to cure composite resin for filling decayed tooth. It intuitively seems that the higher the intensity of dental curing light, the better the curing effect. But in fact, that’s not exact. There is research that shows that at a depth of 2 mm an increase in light intensity produced a significant increase in Vickers Hardness. Howiver, beyond 2 mm depth the increased light intensity did not produce a significant increase in Vickers Hardness. In addition, higher intensity curing leads to a degree of material shrinkage and stress , which can lead to secondary caries. Usually, the curing process takes only a few seconds, but high intensity light may still cause tissue damage – to dental professionals as well as patients. Exposure to high levels of blue light can immediately burn dentist’s retina, while a temperature increase  in the restorative material generated by high intensity curing may cause patient discomfort and pulp damage. Therefore, the intensity of the curing lights currently on the market is limited to a certain range and designed in several modes to match different composite resin. Several other Factors Affecting Curing It is very important to note that wavelength not compatible with light-cured materials can’t make the curing light to achieve the best curing effect,even if the light intensity is appropriate. Molecules called photoinitiators contained in composite resin generate free radicals when they absorb light of

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