Adhesion of Precious Metals Treated with Alkanedithiols

Abstract

Durability of adhesion between acrylic resin and precious metals treated with alkanedithiols HS-(CH₂)_n-SH(n=2, 3, 4, 6, 8, 10)and a thiophosphoric methacrylate(MEPS)was evaluated using PMMA/MMA-TBB resin and experimental fluoropolymer/MMA-TBB resin.Changes in tensile bond strength were measured after thermal cycling in water.The dithiols showed that gold and its alloys were similar to MEPS in effectiveness.Durability against thermal stress depended on the type of resin.Adhesion with the fluoropolymer/MMA resin was more durable than that with the PMMA/MMA resin.