Bonding durability of conventional resinous denture teeth and highly crosslinked denture teeth to a pour-type denture base resin

Purpose: The study examined the bond strength between 2 types of resin dent ure teeth and a pour-type denture base resin after thermocycling. The dentu re teeth were untreated, prepared with diatorics, or treated with a solvent , dichloromethane. Materials and Methods: Conventional denture teeth and cr osslinked denture teeth were bonded to a pour-type denture base resin. Comp ressive load was applied at 45 degrees on the palatal surface of each tooth until fracture. The teeth were either thermocycled or not thermocycled. Po rcelain teeth were also tested for comparison. Results: There was no signif icant difference in bond strength between the conventional resin teeth and the crosslinked denture teeth. Thermocycling significantly decreased the bo nd strength of the 2 types of resin teeth but had no effect on porcelain te eth. The application of dichloromethane significantly improved the bond str ength of the 2 types of resin teeth either before or after thermocycling. C onclusion: It is recommended that dichloromethane be applied on the denture teeth ridge-lap area prior to denture base processing.