Jokstad A, Mjör I A, Qvist V
Dental Faculty, University of Oslo, Norway.
Acta Odontol Scand. 1994 Aug;52(4):234-42. doi: 10.3109/00016359409029052.
In a cross-sectional survey the age of restorations in situ was recorded in three patient groups. Group A were randomly examined regular attenders, group B were irregular attenders randomly chosen from patient treatment records, and in group C the age of posterior gold and composite resin restorations was recorded in selected regular attenders. The study material included 8310 restorations in group A, 1281 in group B, and 500 restorations in group C. The three materials amalgam, composite, and gold accounted for more than 90% of all restorations. In group A 3.3% of the restorations were scheduled for replacement. The most prevalent reasons for replacement were secondary caries, bulk fractures of the restoration, and tooth fractures. The median age of the failed restorations was fairly similar to the median age of the acceptable restorations in situ among the regular patients (group A). The data indicate median ages of 20 years for gold restorations, 12-14 years for amalgam restorations, and 7-8 years for composite resin restorations. The restoration ages were influenced by the type and size of the restoration, the restorative material used, and possibly also the intra-oral location of the restorations.
在一项横断面调查中，记录了三组患者口腔内修复体的使用年限。A组为随机抽取的定期就诊患者，B组是从患者治疗记录中随机选取的不定期就诊患者，C组则记录了选定的定期就诊患者口腔内后牙金修复体和复合树脂修复体的使用年限。研究材料包括A组的8310个修复体、B组的1281个修复体和C组的500个修复体。汞合金、复合树脂和金这三种材料占所有修复体的90%以上。在A组中，3.3%的修复体计划更换。更换的最常见原因是继发龋、修复体大块折断和牙齿折断。失败修复体的中位使用年限与定期就诊患者（A组）口腔内可接受修复体的中位使用年限相当。数据表明，金修复体的中位使用年限为20年，汞合金修复体为12 - 14年，复合树脂修复体为7 - 8年。修复体的使用年限受修复体的类型和大小、所用修复材料以及修复体在口腔内的位置影响。
