Abstract
As a part of our studies to understand the durability of an MMA-based resin cement against thermocycling in adhesion to metals, the changes of bond strength to titanium produced using various cements were examined by a thermocycling test in water with regard to the effects of bonding area, type of adherend material, cement thickness, type of initiator, powder/liquid ratio, and type of polymer powder.Cement thickness, type of adherend material, and type of initiator affected durability of the bond.The powder/liquid ratio in PMMA/MMA-TBB resin had little effect.Among the MMA-soluble polymer powders formulated in MMA-TBB resin, PMMA produced more durable bonds than a homopolymer of ethyl methacrylate or its copolymer with MMA.Measurement of glass transition temperatures of the cured resins suggested that the heterogeneity of the polymer blend may be involved in the reduced durability.
