接着性レジンセメントの歯ブラシ摩耗についての研究 フィラー含有ルーティングセメントにおける歯ブラシ摩耗

Abstract

Although there have been reports on the abrasion of resin cements, cement film thickness was hardly considered.Takamisawa evaluated the influence of the cement film thickness on the abrasion of non-filler type resin cement, and concluded that there was a close relationship between number of times and depth of abrasion. The rate of increase of the wear depth was affected by the cement film thickness.Since most resin cements contained microfiller, Variolink (Vivadent) was examined and it was IPSEmpress (Vivadent) cem kit.Newly-designed appliances to prescribe 3 cement film thicknesses were used, namely 50, 100, and 200 μm, and the abrasion for each thickness in toothbrush abrasion test was observed.Continuous measurements were made of the sectional profile, wear depth, and surface roughness by scanning laser microscope.In SEM observation, the abrasion surface showed different aspects between non-filler and microfiller types.While there was a close relationship between number of times and depth of abrasion as in the case of non-filler type, the amount of increase of the wear depth varied with the cement film thickness.Test results indicated that the cement film thickness had influence on the abrasion of resin cement, and resistance of abrasion was influenced by filler type and resin matrix.