Effects of different treatments of the ridge surface on the shear bond strength between acrylic teeth and thermal polymer resin

Purpose: To evaluate the shear bond strength between denture base and artificial teeth subjected to five different modifications on the ridge surface. Methods: 30 acrylic central anterior teeth were randomly divided into five groups (n=6). The ridge surface of these teeth were treated with different methods: (1) No treatment applied; (2) Monomer wetting; (3) Grinding; (4) Grinding followed by sandblasting; (5) Grinding followed by monomer wetting. After the ridge surface of the teeth were treated, they were packed with denture base resin. The shear bond strength between acrylic teeth and denture base resin was performed using a universal testing machine. The data was statistically analyzed using one-way ANOVA (P < 0.05). Results: The monomer wetting group showed the highest shear bond strength values, and the grinding followed by sandblasting group was the lowest, both were statistically significant compared to each other. There were no statistical differences between the other groups.