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总义齿是大部份牙列缺失患者的代用品。但有部份患者,用常规的义齿不能满足要求。除了从器械、技术和牙齿形态上有助解决这个问题外,从特殊的基托材料方面如金、钴铬合金以及软基托材料如硅橡胶、软丙烯酸酯引起了更大的注意。[金属基托] 目前常用的有金托、钴铬合金托及铝托。金托的主要特点是重。Grunewald曾计算,一个平均大小的下颌,因为拔牙和骨质吸收所丧失的重量,约为30本尼威特(dwt)(1dwt=1.555克)。根据这个计算,他认为理
General denture is the substitute for most dentition patients. However, some patients, with conventional dentures can not meet the requirements. In addition to the mechanical, technical and dental morphological help to solve this problem, more attention has been paid to special base materials such as gold, cobalt-chromium alloys and soft base materials such as silicone rubbers and soft acrylates. [Metal base] are currently used in a metal care, cobalt-chromium alloy care and aluminum care. The main feature of the gold trust is heavy. Grunewald has calculated that an average-sized mandible is about 30 dwt (1dwt = 1.555 grams) due to the weight lost by tooth extraction and bone resorption. According to this calculation, he thinks