Influence of Resin Cements on Durability of Metal-Resin Adhesion

DOI 9 Citations 57 References
  • IKEDA Yasushi
    Division of Biofunctional Materials, Institute for Medical and Dental Engineering, Tokyo Medical and Dental University

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  • 金属とレジンの接着耐久性に及ぼすレジンセメントの影響

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Although many adhesive resins have been developed, the durability of bonding between metals and resin requires further improvement.Stress generated by difference in thermal expansion coefficient of materials involved in the bonding may influence durability.In this study, four types of resin cements, including an experimental one intended for improving durability, were examined for their properties and effect on the change of tensile bond strengths in bonding of titanium and gold/silver/palladium alloy with acrylic resin or stainless steel after thermocycling test.Durability of bonding between the metals and acrylic resin, in which the combination difference in thermal expansion coefficient between the two was relatively large, was far inferior to that between those and stainless steel in all cements.The durability against the thermal stress depended on the type of the resins.A composite resin type cement with high elastic modulus was the least durable.The experimental cement, composed of fluoropolymer/MMA-TBB, with a relatively low elastic modulus and water sorption was most durable.Studies of the experimental resin after curing by DSC and fractionation followed by infrared spectroscopy suggested that it was composed of PMMA and fluoropolymer/PMMA block polymer.The structure and composition of the resin may be related to its improved strength and durability.

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