Autopolymerized Resin Contained 4-META for Prosthetic Application

Part 4. Studies on the Case Suitability of MB-4

Abstract

Clinical applicabilities of MB-4 proposed for the direct relining material to the metal denture base have been studied. Measurements of the amount of residual monomer after polymerization have been made in the first experiment using a spectrophotometer. The volume of the unpolymerized monomer in the sample of MB-4 was about equal to the conventional selfcuring relining resin. After 7-day immersion in water, the residual monomer of MB-4 decreased to the degree of aproximately the same as the heat cured denture base resin. Secondly the dye penetration from the interface of Co-Cr alloy specimen and MB-4 was observed using a stereomicroscope. An extremely small quantity of the dye penetrated between the metal and resin. This observation revealed that MB-4 had a remarkable sealing ability comparing with the conventional resin. It was concluded from these results that MB-4 provided the availability in clinical use for the direct relining material to the metal base.