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Bond strength of denture teeth to denture base resins
Y Takahashi1, J Chai, T Takahashi
1Department of Prosthodontics, Fukuoka Dental College, Fukuoka, Japan.
Purpose:
The study examined the bond strength between 2 types of denture teeth and 3 denture base resins. The denture teeth were untreated, prepared with diatorics, or treated with dichloromethane, a solvent.
Materials And Methods:
Conventional denture teeth and cross-linked denture teeth were bonded to either a heat-cured denture base resin, a microwave-cured denture base resin, or a pour-type denture base resin. Compressive load was applied at 45 degrees on the palatal surface of each tooth until fracture.
Results:
Conventional resin teeth possessed higher bond strength than cross-linked denture teeth. The heat-cured denture base resin significantly surpassed the microwave-cured denture base resin in bond strength. Both materials were better than the pour-type resin. The application of dichloromethane resulted in a significantly better improvement in bond strength compared to the use of diatorics.
Conclusion:
It is recommended that dichloromethane be applied on the denture teeth ridge-lap area prior to denture base processing.