OPER 8120 Chapter Notes - Chapter 1: Radiant Exposure, Dental Dam, Photocure
12 Apr 2020
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Document Summary
Broad but inefficient wavelength of light 370 and 550 nm. Polywaves with multiple led chip types (>1,000 mw) Photocuring in dentistry activate the free radicals by electromagnetic energy contained in light photons with photoinitiators. Beam irradiance homogeneity (irradiance distribution) aka top hat factor . Irradiance decreases from the light tip to the surface material with increasing distance. Note: spectral emission from light curing unite should be matched with spectral absorption of photocurable material. Over-curing resin has no damage to the composite. Avoid tissues & place gauze over oral mucosa. Body, enamel, and translucent shades in 2 mm increments = 8 j to cure. Dentin and a6 and b5 body shades in 1. 5 mm increments = 16 j to cure. Understand that the energy output from the same light varies between uses and tend to deliver lower than the manufacturers recommended energy.
