Bonding strength of the hardended plastic teeth to the denture base acrylic resin.

Abstract

We investigated the bonding strength of hardened plastic teeth to denture base acrylic resin. Two types of hardened plastic teeth conventional plastic teeth and porcelain teeth were used. As the denture base acrylic resin, conventional heat-curing type and heatcuring type containing 4-META adhesive monomer were used. Test specimens were fabricated under four tooth ridge lap treatments, 1) no treatment, 2) grinding, 3) monomer application, and 4) grinding and monomer application.Then bonding strengths were measured according to JIS specification.The bonding strength of conventional plastic teeth to denture base acrylic resin did not differed with denture base acrylic resin and tooth ridge lap treatments. Also the variation coefficient of bonding strength of conventional plastic teeth did not vary with denture base acrylic resin and the treatments. The bonding strength of hardened plastic teeth to denture base acrylic resin were the same of larger than that of conventional plastic teeth to denture base acrylic resin. The bonding strengths of hardened plastic teeth to denture base acrylic resin were increased with tooth ridge lap treatments, but the variation coefficient of bonding strength of hardened plastic teeth were less varied with the treatments. These results were clearly observed in the use of denture base acrylic resin containing 4-META.

Wear of Denture Teeth by Use of Metal Plates. Part 3: Abrasive Wear of Posterior Teeth and Wear of Opposing Metal Plates.

“…High-strength denture teeth have been developed, which retain some of the advantages of plastic teeth, such as easy occlusal adjustment and cost, while achieving improved hardness and abrasive wear resistance [1][2][3]. Findings of basic studies on these HS teeth have been reported in terms of impact resistance [4], bonding strength with denture base resin [5,6], hardness [1][2][3]5,6], and wear resistance of anterior teethm. However there seem to have been few studies on the abrasive wear resistance of posterior high-strength denture teeth [8.9].…”