摘要
考察了松风－镍铬合金系列的烤瓷厚度和不均匀度与种植金瓷固定义齿瓷裂的关系。结果表明：当瓷粉厚度达到３．５ｍｍ时，开始出现瓷裂；在轴面沿轴向以１ｍｍ的梯度涂塑瓷粉至２ｍｍ将产生较多瓷裂，厚度突然中断则瓷裂严重；连接体是产生裂纹的主要部位；用体视镜观察裂纹优于肉眼观察。提示体瓷瓷粉厚度小于３．５ｍｍ，厚度均匀，外形圆缓，避免瓷的厚度和连接体形状的突然变化，可有效地防止瓷裂，否则必须做内层冠。
This experiment studied the influence of porcelain thickness and nonuniformity on porcelain crack in implantsupported metalporcelain fixed bridge. The result indicated that porcelain crack began to appear when the body porcelain powder was 35mm in thickness; more cracks took place when the powder thickness increased by 1 mm to 2 mm on the axial surface in the axial direction; cracks became serious when the thickness suddenly changed to zero; and connectors were liable to cracks. Therefore, in designing and fabrication, one should avoid and sudden change in the shapes of the connector and the porcelain on it, any sudden change in the thickness of porcelain and a thickness of porcelain powder not less than 3.5mm. Otherwise, it is neccessary to use internal crown between metal base and abutment to meet the demands.
出处
《华西医科大学学报》
CSCD
1997年第4期357-360,共4页
Journal of West China University of Medical Sciences
基金
卫生部青年科学研究基金
关键词
种植固定桥
瓷层
厚度
不均匀度
瓷裂
义齿
Implant supported fixed bridge Porcelain fusedto metal Porcelain thickness Porcelain uniformity Porcelain crack
