Abstract:

BACKGROUND: Novel denture base resin can be polymerized rapidly. However, the effect of this method on resin mechanical performance and microstructure remains unclear.
OBJECTIVE: To observe the effects on the mechanical properties of denture base resin polymerized by different methods.
METHODS: The denture base resin of experimental and control groups were respectively polymerized by rapid or traditional methods. The impact strength, flexural strength, elastic modulus and Brinell hardness of two groups were measured. The cross-sections of different resin samples were detected by scanning electron microscopy.
RESULTS AND CONCLUSION: The impact strength of resin were (6.73±1.23) and (7.35±0.93) kJ/mm³, the flexural strength were (89.93±12.92) and (90.19±6.88) MPa, the elastic modulus were (2.2±0.2) and (2.4±0.1) GPa, and the Brinell hardness were (20.70±2.89) and (9.57±1.05) kg/mm², respectively in experimental and control groups. All data of two different groups were not statistically significant (P > 0.05). Microstructures of cross-sections of two different groups observed by scanning electron microscopy were also similar. The mechanical properties and the microstructures of the denture base resin were not affected by different polymerization methods.