A Study on the Adhesion of Silicone Rubber to Co-Cr Alloy, Ni-Cr Alloy or Titanium

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  • UCHIYAMA Seiya
    Department of Dental Materials, Nihon University School of Dentistry at Matsudo
  • KATSUKI Hirokazu
    Department of Dental Materials, Nihon University School of Dentistry at Matsudo

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  • Co-Cr合金, Ni-Cr合金および純チタンとシリコーンゴムとの接着に関する研究

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Abstract

To reline the metal denture base by a silicone resilient liner, some methods of producing a durable adhesion between silicone rubber and denture metal(Co-Cr alloy, Ni-Cr alloy or Ti)as an extension of the adhesion between silicone rubber and acrylic resin were tested.The monomer with a-SiH group, γ-MPTDMS, was synthesized and copolymerized with MMA.When the copoly(MMA/γ-MPTDMS)solution in tetrahydrofuran, named a g-MPTDMS adhesive, was used after the copoly(MMA/4-MET)was applied as a primer, the Co-Cr alloy specimen yielded a tensile bond strength of 49kgf/cm2under dry conditions, though it did not show any stability in water after thermal cycling(4℃-60℃, 60s).When the mixture solution of copoly(MMA/4-MET)and copoly(MMA/γ-MPTDMS)was used as an adhesive, the tensile bond strength of the specimens tended to increase with the increasein the concentration of copoly(MMA/γ-MPTDMS)in the adhesive.The net copoly(MMA/γ-MPTDMS)solution, i.e., γ-MPTDMS adhesive, had the highest tensile bond strength.Thus the adhesive developed for bonding silicone rubber to acrylic resin was also effective for bonding silicone rubber to denture metals.When the γ-MPTDMS adhesive was used to bond the Co-Cr alloy, Ni-Cr alloy, or Ti to silicone rubber, thetensile bond strength was 48, 44 or 41kgf/cm2, respectively, under dry conditions, and the stability in water was enhanced by the sandblast treatment.

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