Contraction stress and marginal adaptation of composite restorations in dentinal cavity.
Contraction stress and marginal adaptation of composite restorations in dentinal cavity.
复制标题
牙本质腔内复合修复体的收缩应力和边缘适应。
DOI：
10.4012/dmj.13.19
复制
发表时间：
1994
影响因子：
2.5
通讯作者：
H. Shimokobe
中科院分区：
文献类型：
--
作者：
S. Uno;H. Shimokobe
使用三种修复树脂系统研究了复合树脂的收缩应力对牙本质 (BS) 的剪切粘合强度和标准化牙本质腔中边缘适应的影响。将复合树脂填充到放置在人牙齿牙本质上的聚四氟乙烯环模具（TF）或具有粗糙内表面（CP）的铜环，然后进行剪切测试。 BS 的方差分析表明树脂系统和模具类型的显着影响。在所有三个系统中，BSCP 均低于 BSTF。这表明CP的内表面限制了树脂的流动，然后在与牙本质的粘合界面处产生收缩应力。 BSTF 和 BSCP 之间差异最小的系统也表现出最好的适应性。该结果表明复合树脂中的收缩应力在边缘适应中起着重要作用。
The influence of contraction stress in composite resins on both the shear bond strength to dentin (BS) and marginal adaptation in a standardized dentin cavity was investigated using three restorative resin systems. A teflon ring mold (TF) or copper ring with a roughened inner surface (CP) placed on human tooth dentin was filled with the composite resin, and a shearing test was then performed. ANOVA of BS demonstrated a significant influence from the resin systems and type of molds. BSCP tended to be lower than BSTF in all three systems. This suggested that the inner surface of the CP restricted the flow of resin and then contraction stress occurred at the interface of the bond to the dentin. The system which demonstrated the smallest difference between BSTF and BSCP also showed the best adaptation. This result indicates that contraction stress in the composite resin plays an important role in marginal adaptation.