Fotopolimerização em odontologia: desempenho de unidades de fotoativação e fotoiniciadores contemporâneos

Abstract

Objective: to evaluate physicochemical properties of photoinitiators and experimental materials with dental light-curing devices through in vitro and in situ studies. Methodology: studies were carried out evaluating the physicochemical properties of experimental materials using photoinitiators in different formulations, photoinitiators were evaluated with second and third-generation light-curing units, in addition, the influence of protective barriers on the performance of light emitted by light-curing devices was evaluated. second and third generation. Results: Alternative photoinitiators in a one-step self-etching adhesive system containing diphenyl iodonium chloride (DPI) in a tertiary system showed better performance in terms of mechanical properties in experimental adhesives under wet conditions. Third generation light-curing units present a better performance in the absorption spectrum of the photoinitiators, in addition, the photoinitiators did not influence the yellowing effect of an experimental adhesive, finally, protection barriers can influence the light emission performance of dental light-curing units, however, the potency of the curing light is more influenced by the distance between the material and the light source. Conclusion: depending on the formulation, photoinitiators can influence the physicochemical properties of dental materials. The polymerization efficiency is influenced by the distance and type of device.