Utilização do laser de diodo como alternativa no tratamento de superfície em restaurações CAD/CAM

Abstract

Since the 1970s, the application of the CAD / CAM technique has been suggested in the dental clinic with the aim of simplifying, automating and guaranteeing quality levels with micrometric adaptations of our dental prostheses4,5. The objective of this study was to evaluate the viability of the diode laser as an alternative to hydrofluoric acid and aluminum oxide blasting compared to the machining process in the surface treatment of the following restorative materials: hybrid ceramics, nanoceramic resin, reinforced lithium silicate ceramics by zirconia, feldspathic ceramics, vitreous ceramics with crystalline structure of lithium disilicate, vitreous ceramics with crystalline structure of leucite. A specimen was prepared for each of the seven CAD / CAM restorative materials; And, this was divided into four parts. The dimensions of the specimens were 1cm in length and 1cm in width, in the thickness of 1mm, color A2. The surface area of the specimen was subdivided into quadrants; (A) was applied to the diode laser, (B) received the blasting of aluminum oxide, (C) received the application of hydrofluoric acid (5 or 10%) or cleaning with isopropyl alcohol (10%); As indicated by the manufacturer, (D) no conditioning was applied and the surface passed through the machining process only. Images were taken at a 15,000- fold increase (SEM). For the surface roughness test, ten measurements were taken, with cut-off 0.25. Statistical data were submitted to ANOVA and Tukey's test. Knowing the need to seek new alternatives of a conditioning protocol on the surface of restorative materials in CAD / CAM, it was highly effective, fast, simplified and mainly safe. It can be stated that the use of the diode laser seems to be feasible for the surface treatment of ceramic with crystalline structure of lecithin Empress CAD and ceramic feldspathic Cerec Blocs CAD / CAM, as it produced changes in the surface of these ceramics studied.