银汞合金是目前后牙缺损修复中较多用的材料，其最明显的缺陷是易出现继发龋及材料与牙齿的部分折断［１］。本文通过体外微漏实验观测新旧银汞合金之间的结合情况，并对２５例临床修复后追踪观察，现报告如下。材料与方法１标本制做：取直径约１０ｍｍ，高约８ｍｍ塑料... Silver amalgam is the most commonly used material in the repair of posterior teeth defects. The most obvious defects are secondary dental caries and the partial breakage of materials and teeth [1]. In this paper, in vitro micro-leakage experiment observed the old and the new silver amalgam between the binding, and 25 cases of clinical follow-up after repair, are as follows. Materials and methods 1  specimen making: take about 10mm in diameter, about 8mm high plastic ...