Collins C J, Bryant R W
Westmead Hospital Dental Clinical School, New South Wales, Australia.
J Dent. 1992 Aug;20(4):202-6. doi: 10.1016/0300-5712(92)90074-m.
Class I and Class II amalgam restorations were placed in the permanent teeth of 66 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 (using a prophylaxis paste on rubber cups at low speed, 8 or 10 min after trituration), and at least one restoration was polished (using finishing burs and polishing points, more than 24 h after placement). The number of restorations available for assessment of marginal fracture using the 11-unit photographic scale developed by Mahler was 253 at baseline, 249 at 1-year and 2-year recalls and 228 at the 3-year recall. Although polished restorations exhibited greater initial (baseline) marginal fracture, at 1-year, 2-year and 3-year recalls the restorations were found to exhibit a similar amount of marginal fracture regardless of the finishing technique. The amount of perceived marginal fracture increased steadily after 1 year. The immediate finishing of amalgam restorations showed no long-term benefit over the other techniques and has little to commend it. The clinical finishing of amalgam restorations is discussed in the light of this and other research.
I类和II类汞合金修复体被放置在66名患者的恒牙中，每位患者至少接受了3次修复。这些修复体中至少有一个是仅雕刻的，至少有一个是立即完成的（在研磨后8或10分钟，使用低速橡胶杯上的预防性糊剂），并且至少有一个修复体是抛光的（在放置后超过24小时，使用精修车针和抛光尖）。使用Mahler开发的11单位摄影量表评估边缘折断时，基线时有253个修复体可供评估，1年和2年随访时有249个，3年随访时有228个。尽管抛光修复体在初始（基线）时边缘折断情况更严重，但在1年、2年和3年随访时，无论采用何种完成技术，修复体的边缘折断量相似。1年后，可察觉到的边缘折断量稳步增加。汞合金修复体的立即完成与其他技术相比没有长期优势，也没有什么值得推荐的。根据这项研究和其他研究对汞合金修复体的临床完成情况进行了讨论。
