Shear bond strength of metal-ceramic repair systems

摘要: Statement of problem When clinical fractures the ceramic veneer on metal-ceramic prostheses can be repaired, need for remake may eliminated or postponed. Many different repair materials are available, and bond strength data necessary predicting success a given system. Purpose This study evaluated shear systems restorations applied metal porcelain. Material methods Fifty cylindrical specimens (9 × 3 mm) were fabricated in nickel-chromium alloy (Vera Bond II) 50 feldspathic porcelain (Noritake). Metal (M) (P) embedded polyvinyl chloride (PVC) ring received 1 following bonding resin composite (n=10): Clearfil SE Bond/Clearfil AP-X (CL), Bistite II DC/Palfique (BT), CoJet Sand/Z100 (CJ), Scotchbond Multipurpose Plus/Z100 (SB) (control group), Sand plus (CJSB). The stored distilled water 24 hours at 37°C, thermal cycled (1000 cycles 5°C to 55°C), 37°C 8 days. Shear tests between performed mechanical testing machine with crosshead speed 0.5 mm/min. Mean values (MPa) submitted 1-way ANOVA Tukey honestly significant difference (α=.05). Each specimen was examined under stereoscopic lens ×30 magnification, mode failure classified as adhesive, cohesive, combination. Results On metal, mean groups follows: MCL, 18.40 ± 2.88 b ; MBT, 8.57 1.00 d MCJ, 25.24 3.46 MSB, 16.26 3.09 bc MCJSB, 13.11 1.24 c . porcelain, each group PCL, 16.91 2.22 PBT, 18.04 3.23 ab PCJ, 19.54 3.77 PSB, 21.05 3.22 PCJSB, 16.18 1.71 Within substrate, identical superscript letters denote no differences among groups. Conclusions substrate significantly higher using CJ For SB, CJ, BT showed highest values, only SB compared CL CJSB ( P