Bryant R W, Collins C J
J Dent. 1989 Jun;17(3):111-6. doi: 10.1016/0300-5712(89)90101-2.
One operator placed 249 Tytin amalgam restorations in Class I and II preparations in the permanent teeth of 60 patients each of whom received a minimum of three restorations. At least one of these restorations was carved-only, at least one was immediately finished (at 8 or 10 min after trituration), and at least one restoration was polished (more than 24 h after placement). Restorations were principally assessed for marginal fracture at baseline and 1 year using the 11-unit scale for the evaluation of photographs developed by Mahler. Five factors were also assessed clinically at 1 year. Amalgam restorations, polished using finishing burs and rubber points at least 24 h after placement, exhibited more initial marginal fracture than carved-only or immediately finished restorations. At 1 year, the three techniques were comparable except for the superior surface texture of the polished restorations. The technique of immediate finishing of amalgam restorations has nothing to commend it in preference to existing techniques.
一名操作人员在60名患者的恒牙Ⅰ类和Ⅱ类窝洞中放置了249颗Tytin银汞合金修复体，每位患者至少接受了三颗修复体。这些修复体中至少有一颗仅进行雕刻，至少有一颗立即完成（在研磨后8或10分钟），并且至少有一颗修复体进行了抛光（放置后超过24小时）。修复体主要在基线和1年时使用Mahler开发的用于评估照片的11级量表评估边缘折断情况。在1年时还对五个因素进行了临床评估。放置后至少24小时使用修整车针和橡皮尖进行抛光的银汞合金修复体，比仅雕刻或立即完成的修复体表现出更多的初始边缘折断。在1年时，除了抛光修复体的表面质地更好外，这三种技术相当。银汞合金修复体立即完成的技术与现有技术相比没有什么可取之处。
