Lemmens P L, Letzel H, Peters M C, van't Hof M A
Department of Cariology and Endodontology, University of Nijmegen, The Netherlands.
J Oral Rehabil. 1988 Nov;15(6):521-9. doi: 10.1111/j.1365-2842.1988.tb00188.x.
A controlled clinical study, containing 720 posterior amalgam restorations placed in a group of 103 adult patients by three dentists, was used for examination of the influences on the incidence of occlusal and approximal bulk fractures. These fractures were evaluated from black and white photographs, taken annually, of the occlusal surface of the restorations over a 5-year period, using a three point photo-rating scale for both fracture sites. The influence of the dentist as well as the influence of the alloy and tooth type were statistically analysed. The results of these analyses demonstrated that the dentist, as well as the alloy and tooth type, have a statistically significant influence on the incidence of bulk fracture of amalgam restorations.
一项对照临床研究纳入了103名成年患者，由三名牙医为他们放置了720个后牙汞合金修复体，用于考察对咬合面和邻面大块骨折发生率的影响。在5年时间里，每年拍摄修复体咬合面的黑白照片，使用三点照片评分量表对两个骨折部位进行评估，以此来评价这些骨折情况。对牙医的影响以及合金和牙齿类型的影响进行了统计学分析。这些分析结果表明，牙医以及合金和牙齿类型对汞合金修复体大块骨折的发生率具有统计学上的显著影响。
