The effect of sandblasting surface treatment on shear bond strength between acrylic denture teeth and thermoplastic nylon denture base

Abstract

Thermoplastic nylon has been introduced in dentistry as a material for denture bases since 1950’s. Thermoplastic nylon has become a popular alternative for denture fabrication, which provides better aesthetics and several advantages. Unfortunately, thermoplastic nylon has insufficient shear bond strength with acrylic resin, causing the acrylic denture teeth to often debond from the thermoplastic nylon denture base. Sandblasting is suggested can be used to increase shear bond strength between artificial teeth and denture bases. This study aims-to evaluate the effect of sandblasting surface treatment on shear bond strength between acrylic denture teeth and thermoplastic nylon denture base. Four groups with different aluminum oxide particle sizes (No treatment, 50 μm, 110 μm, 250 μm) were used in this study (n=8). A universal testing machine was used to test the specimens. The data were analyzed using the One-way ANOVA test. One-way ANOVA showed a statistically significant difference between groups (P < 0.001). There is an effect of sandblasting surface treatment on shear bond strength between acrylic denture teeth and thermoplastic nylon denture base. Sandblasting with 250 μm aluminum oxide showed the best result than another group.

KEY WORDS: shear bond strength, sandblasting, acrylic denture teeth, thermoplastic nylon, denture base.