Cagidiaco M C, Ferrari M, Bertelli E, Mason P N, Russo J
Int J Periodontics Restorative Dent. 1992;12(4):324-31.
Ten metal-ceramic restorations with buccal porcelain butt margins and palatal metal beveled margins were fabricated for periodontally hopeless teeth. After cementation, the experimental crowns remained in the oral environment for 3 to 6 months; the teeth were then extracted and used for microscopic and microleakage evaluation. All ten crowns showed at least a small amount of microleakage, but adaptation of beveled margins proved to be superior to that of shoulder porcelain margins.
为牙周预后无望的牙齿制作了10个金属烤瓷修复体，其颊侧为瓷对接边缘，腭侧为金属斜切边缘。粘结后，实验性牙冠在口腔环境中保留3至6个月；然后拔牙并用于微观和微渗漏评估。所有10个牙冠均显示至少有少量微渗漏，但斜切边缘的贴合性被证明优于肩台瓷边缘。
