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大多数充填修复材料不能与牙体组织结构进行化学性结合,必须依靠机械性切割或合适的材料才能取得良好固位。这种结合会产生微渗漏,导致细菌侵入,影响疗效。本文目的是评价7种修复材料的边缘封闭效果。 材料和方法 将60颗完整的人类前磨牙和第三磨牙贮藏在76％酒精中以防止细菌污染,其中4颗牙作为对照组,其余牙随机分为2组,每组28颗。第一组在牙的颊面制备传统V类洞,舌面制备楔状
Most filling materials do not chemically bond with the structure of the tooth and must rely on mechanical cutting or suitable materials to achieve good retention. This combination will produce micro-leakage, resulting in bacterial invasion, affect the efficacy. The purpose of this paper is to evaluate the effectiveness of the edge seal of seven repair materials. Materials and Methods Sixty intact human premolars and third molars were stored in 76% alcohol to prevent bacterial contamination. Four teeth were used as the control group, and the remaining teeth were randomly divided into two groups of 28 in each group. The first group prepared traditional V-like cavities on the buccal surfaces of the teeth and the wedges on the lingual surfaces