Análise da desadaptação marginal vertical em coroas de cerâmicas feldspáticas confeccionadas através do sistema CAD/CAM, pela técnica direta e indireta: análise em microscopia óptica

Abstract

This study evaluates the marginal vertical mismatch of feldspathic ceramics manufactured by the CAD/CAM CEREC AC system, with two differences virtual kinds of methods, direct and indirect way. Given the two methods, the crowns were manufactured by the direct way in metallic encasings, laminated by a thin layer of titanium dioxide and plasterboard replicas in the same way in IV kind. Twenty feldspathic ceramics crowns were milled having the Cerec Blocks (Sirona dental systems GmbH Bensheim, Germany), 10 for each group. Using an optical microscope, the marginal vertical mismatch were examined in 6 handed out points in equidistante steps, for each one was given 3 measurement, they were done in a magnification (50x) in a measurement microscope software (SCapture VERSION 3.7.8, xintu phototonics, tucsen China). The results show that the MD direct group (24,06 ± 8,54 μm) and the indirect MI (24,85 ± 7,44 μm) do not have any statistically difference (p≥0.05). According to the results, the difference were not big, direct (MD and MI) and indirect according to the marginal vertical adaptation. The titanium dioxide laminated; do not interfered in the marginal vertical mismatch.