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烤瓷熔附金属修复体(PFM)在上瓷的每一过程都可能导致铸件变形,对边缘的适合性造成不利的影响。目前有关边缘变形尚存在不同看法。有人认为瓷金冠边缘金属袖套宽度减小到0.5mm以下时,上瓷烧烤可引起边缘变形,还有人指出台肩斜面型的边缘设计可避免边缘变形。但是也有人发现上瓷烧烤不影响边缘的适合性。本实验的目的是考察瓷金固定桥在制作的每一程序中对边缘变形的影响。材料和方法本实验对三单位瓷金固定桥(第二双尖牙和桥体为金瓷覆盖,第二磨牙无瓷覆盖)在铸造、除气、上覆盖瓷、体瓷、上釉以及焊接每一过程
Each process of porcelain fused metal restoration (PFM) on porcelain may cause the castings to deform, adversely affecting the fit of the edges. At present there are different views on the edge deformation. Some people think that when the width of porcelain canopy edge metal cuffs is reduced to less than 0.5mm, the porcelain roasting can cause edge deformation, while others point out that the bevel edge type of edge design can avoid the edge deformation. But some people also found that the porcelain barbecue does not affect the suitability of the edge. The purpose of this experiment is to examine the influence of the porcelain-gold fixed bridge on the edge deformation in each program produced. Materials and Methods In this experiment, three units of porcelain gold fixed bridge (the second pair of canine and bridge for the porcelain cover, the second molar without porcelain cover) in casting, degassing, covered porcelain, porcelain, glazing and welding Every process