Bond strength between an acrylic resin and artificial tooth

Objectives: to evaluate the tensile bond strength by micro-tensile test of conventional heat-cured acrylic resin (Lucitone 550 – DENTSPLY) with acrylic resin denture teeth (Biotone – DENTSPLY), submitted to different polymerization cycles and storage. Methods: Twenty four specimens were fabricated (n=6), G1 (immediate; without storage); G2 (mediate; without storage); G3 (immediate; with storage); G4 (mediate; with storage). Specimens were storage in distilled water until testing and sectioned in two axis (X and Y), with a diamond blade to obtain 12 I-shaped specimens (± 1 mm² of section area). Each specimen was fixed to a device, which was mounted in a universal testing machine (EMIC-DL-1000, Brazil) and tested with 0.5 mm/min. Results: bond strength was no significantly affected by the treatment (P > .05),G1 28,66; G2 28,25; G3 26,83 and G4 30,66; (2-way ANOVA and Tukey tests, alpha=.05). Conclusion: The most common failure was cohesive. Within the limitations of this study, there was no difference among groups.