Arikawa H, Kuwahata H, Seki H, Kanie T, Fujii K, Inoue K
Department of Dental Materials Science, Kagoshima University Dental School, Japan.
Dent Mater J. 1995 Jun;14(1):78-83. doi: 10.4012/dmj.14.78.
The deterioration of the mechanical properties of composite resins was examined. The bending strength and the stress relaxation rate for sixteen experimental composite resins with different filler shapes, particle sizes and filler contents immersed in distilled water for 0-60 days were measured. The bending strength of all of the composites decreased with the increase of the immersion time in water. The composites with a high filler content (65 vol%) showed a greater decreasing ratio of bending strength than those with low filler content (40 vol%). The stress relaxation rate also increased with and increase of immersion time. The phenomena may be caused by the hydrolytic degradation of the silane coupling agent (gamma-MPTMS).
研究了复合树脂力学性能的劣化情况。测量了16种具有不同填料形状、粒径和填料含量的实验复合树脂在蒸馏水中浸泡0至60天的弯曲强度和应力松弛率。所有复合材料的弯曲强度均随在水中浸泡时间的增加而降低。填料含量高（65体积%）的复合材料弯曲强度的降低比例比填料含量低（40体积%）的复合材料更大。应力松弛率也随浸泡时间的增加而增加。这些现象可能是由硅烷偶联剂（γ-MPTMS）的水解降解引起的。
