Restaurações indiretas unitárias obtidas pela tecnologia CAD/CAM chairside: avaliação laboratorial

Abstract

CAD / CAM system in dentistry is an alternative to obtain all-ceramic crowns. The marginal adaptation of these crowns depends on the correct use of the scanner, software and milling machine. The type of ceramic material selected CAD / CAM crowns could influence the marginal adaptation. It is known that the selection of the ceramic material is carried out considering physical and optical properties and a region to be rehabilitated, but identifying the materials that bring the best fit may be another factor (Chapter 1). In addition, new data acquisition technologies of different scanners could minimize the marginal adaptation (Chapter 2). Finally, the range of the luting space parameters determines the degree of marginal and internal seating of the crown. Consequently, an internal fit is correlated to the space occupied by the resin cement and a variation could influence a quantity of cement and a crown resistance. In addition, the ceramics thickness could attenuate the irradiation and the wavelength, which alter the polymerization and deformation of the crown (Chapter 3). Therefore, the balance between the use of scanner technology, software, resin resin thickness and ceramic material should be considered to have a crowns with good marginal and internal fit.