4-META/MMA-TBB系接着剤の接着強さに及ぼす架橋剤の影響

概要

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A cross-linking agent was added to increase the bonding strength of Superbond C & B by improving its cohesiveness. PMMA powder, which was copolymerized with 0.5% (w/w) neopentylglycol dimethacrylate as a cross-linking agent, was used for the preparation of Super-bond C & B. The bonding of Superbond C & B to which the cross-linking agent had been added was then examined by the pull-out test using an alloy with different levels of surface roughness prepared by two surface-processing methods (polishing with # 600 waterproof abrasive paper or 50μm sandblast processing). The results were as follows : 1. Superbond C & B had a bonding strength of 205 kgf/cm^2 after polish processing of the alloy with # 600 waterproof abrasive paper and 199 kgf/cm^2 after 50 pm sandblast processing. The t-test showed no significant difference between the two types of processing. 2. Superbond C & B to which the cross-linking agent had been added showed a bonding strength of 285 kgf/cm^2 in the material processed with # 600 waterproof abrasive paper and 347kgf/cm^2 in that processed with 50μm sandblast processing. 3. Among various combinations of bonding agents and surface processing methods, the combination of Superbond C & B with the cross-linking agent and 50μm sandblast processing showed the highest values under all conditions.
日本補綴歯科学会の論文
1989-10-01