Influência da fotoativação na estabilidade de cor de resinas compostas – revisão de literatura

Abstract

The aim of this study was to evaluate the impact of photoactivation on the color stability of composite resins for direct restorations against intrinsic and extrinsic factors. An integrative literature review was carried out from the PubMed and VHL databases, with the crossing of descriptors and filters restricting the period of publication and language. After reading the titles and abstracts, duplicate articles were removed to continue reading in full. The selected studies went through a complete reading and their relevant data were inserted in a table to be analyzed and discussed. The review included 12 articles from laboratory tests that use different types of composite resin, varying among themselves in terms of the size of inorganic particles, as well as the photoactivation units and the irradiation protocols for the curing reaction of the resins. The most used photoactivating units were based on LED (Light Emitting Diode) or halogen light bulbs. The method for color evaluation in all studies was the CIELAB system. The size of inorganic particles of composite resins has been shown to directly impact the color stability in the face of exposure to pigments present in the diet, however in a lesser extent, if compared to the influence of the photoactivation mode. LEDs are the most efficient light curing system, even with the variety of power density of devices and the mode of light emission.