Gavelis J R, Morency J D, Riley E D, Sozio R B
J Prosthet Dent. 1981 Feb;45(2):138-45. doi: 10.1016/0022-3913(81)90330-9.
The influences of the marginal design of a full crown on the occlusal seat and marginal seal of a cemented full crown restoration was examined. Under the conditions of the study, the featheredge and parallel bevel preparations demonstrated the best marginal seal, followed in order by the full shoulder, 45-degree shoulder, and finally the 90-degree shoulders with 30-degree and 45-degree bevels. With regard to seating of the restoration, the 90-degree full shoulder demonstrated the best seat, followed in order by the 45-degree shoulder, 90-degree shoulder with 45-degree bevel, featheredge, 90-degree shoulder with 30-degree bevel, chamfer with parallel bevel, and finally 90-degree shoulder with parallel bevel.
研究了全冠边缘设计对粘结式全冠修复体的咬合面就位和边缘封闭的影响。在本研究条件下，刃状边缘和平行斜面预备显示出最佳的边缘封闭效果，其次依次是全肩台、45度肩台，最后是带30度和45度斜面的90度肩台。关于修复体的就位，90度全肩台显示出最佳就位效果，其次依次是45度肩台、带45度斜面的90度肩台、刃状边缘、带30度斜面的90度肩台、平行斜面的肩台，最后是带平行斜面的90度肩台。
