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Volume 13 , Issue 2
March/April 2000

Pages 112-116

Bonding Durability of Conventional Resinous Denture Teeth and Highly Crosslinked Denture Teeth to a Pour-Type Denture Base Resin

John Chai, BDS, MS, MJ, DLaw/Yutaka Takahashi, DDS, PhD/Tomoko Takahashi, DDS/Tetsuya Habu, DDS, PhD

PMID: 11203618

Purpose: The study examined the bond strength between 2 types of resin denture teeth and a pour-type denture base resin after thermocycling. The denture teeth were untreated, prepared with diatorics, or treated with a solvent, dichloromethane. Materials and Methods: Conventional denture teeth and crosslinked denture teeth were bonded to a pour-type denture base resin. Compressive load was applied at 45 degrees on the palatal surface of each tooth until fracture. The teeth were either thermocycled or not thermocycled. Porcelain teeth were also tested for comparison. Results: There was no significant difference in bond strength between the conventional resin teeth and the crosslinked denture teeth. Thermocycling significantly decreased the bond strength of the 2 types of resin teeth but had no effect on porcelain teeth. The application of dichloromethane significantly improved the bond strength of the 2 types of resin teeth either before or after thermocycling. Conclusion: It is recommended that dichloromethane be applied on the denture teeth ridge-lap area prior to denture base processing.

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