Retention strength between veneering resin composites and laser-sintered cobalt-chromium alloy.

摘要: The purpose of the present study was to evaluate retention strength between a resin composite veneering material and three types cobalt-chromium (Co-Cr) alloy substrates. Co-Cr specimens with 81 devices (LSR), 144 (LDR), without device (LN) were fabricated using laser-sintering system. air-abraded alumina, conditioned primer [Alloy (AP) or M.L. (ML)], veneered light-polymerized (Gradia). Three control groups (LSR-N, LDR-N, LN-N) also prepared. After 20,000 thermocycles in 4 60 °C water, tensile strengths determined universal testing machine. Data analyzed by analysis variance post hoc Tukey-Kramer HSD test (α = 0.05, n = 8). highest obtained LSR-AP (28.3 MPa), LSR-ML (23.3 MPa), LDR-AP (26.9 MPa), LDR-ML (27.8 MPa), these values not significantly different. In absence device, different following order: LN-N (0.1 MPa) < LN-ML (12.4 MPa) < LN-AP (20.2 MPa). (0.1 MPa) < LSR-N (15.4 MPa), LDR-N (17.1 MPa). No significant difference found numbers devices, which 144. conclusion, combined use primers is recommended when laser-sintered materials maximize strength.