Feilzer A J, De Gee A J, Davidson C L
Department of Clinical Materials Science, ACTA, University of Amsterdam, The Netherlands.
J Dent Res. 1987 Nov;66(11):1636-9. doi: 10.1177/00220345870660110601.
The setting stress in composite resins was studied as a function of restoration shape. The shape is described by the configuration factor, C, the ratio of the restoration's bonded to unbonded (free) surfaces. In an experimental set-up, the shape of the restoration was simulated by cylindrical forms of various dimensions. The shrinkage stress was measured continuously. It was shown that in most of the clinically relevant cavity configurations, the stress-relieving flow is not sufficient to preserve adhesion to dentin by dentin-bonding agents.
研究了复合树脂中的固化应力与修复体形状的关系。修复体形状通过构型因子C来描述，即修复体粘结表面与未粘结（自由）表面的比率。在一个实验装置中，通过不同尺寸的圆柱形状模拟修复体的形状。连续测量收缩应力。结果表明，在大多数临床相关的窝洞构型中，应力释放流动不足以维持牙本质粘结剂与牙本质的粘结。
