Hegarty S M, Pearson G J
University College London Dental School, U.K.
J Oral Rehabil. 1990 Jul;17(4):351-7. doi: 10.1111/j.1365-2842.1990.tb00019.x.
A previous investigation identified three types of cuspal movement that occur as a result of polymerization shrinkage when extracted molar teeth are filled with a microfine or hybrid composite used in conjunction with a dentine adhesive. That investigation was extended further by dye penetration and SEM studies of the margin, involving assessment of the degree of dye penetration and marginal integrity around the restoration. These studies indicate that there may be a failure of the adhesive bond between tooth and composite/adhesive complex which correlates with little or no cuspal movement. Failure within the tooth structure itself was also observed in a number of cases.
先前的一项研究确定，当用微细化或混合复合材料与牙本质粘合剂结合填充拔除的磨牙时，聚合收缩会导致三种牙尖移动类型。通过对边缘进行染料渗透和扫描电子显微镜研究进一步扩展了该研究，包括评估修复体周围的染料渗透程度和边缘完整性。这些研究表明，牙齿与复合材料/粘合剂复合体之间的粘合剂粘结可能会失效，这与很少或没有牙尖移动相关。在一些病例中还观察到牙齿结构本身内部的失效。
