Hegdahl T, Gjerdet N R
Acta Odontol Scand. 1977;35(4):191-5. doi: 10.3109/00016357709004654.
The polymerization shrinkage of composite resin filling materials and the tensile stresses developed when the shrinkage is restrained were measured in an in vitro experiment. This allows an estimation to be made of the forces exerted upon the enamel walls of cavities filled with the resin in the acid etch technique. The results indicate that the stresses acting on the enamel are low compared to the tensile strength of the enamel.
在一项体外实验中，测量了复合树脂填充材料的聚合收缩以及收缩受到抑制时产生的拉应力。这使得能够估计在酸蚀技术中，树脂填充的窝洞的釉质壁上所受到的力。结果表明，与釉质的抗张强度相比，作用于釉质上的应力较低。
