Owall B, Cronström R, René N
Dept. of Prosthetic Dentistry, School of Dentistry, Faculty of Health Sciences, University of Copenhagen, Denmark.
Acta Odontol Scand. 1992 Dec;50(6):365-74. doi: 10.3109/00016359209012784.
The Swedish Patient Insurance Scheme includes a guarantee insurance for prosthetic treatment. Retreatments of failures, up to 2 years after cementation of fixed prosthodontics and 1 year after delivery of removable prosthodontics, are covered by the guarantee insurance scheme. Almost all private practitioners were included in this scheme at the time of the study in 1989. During a specific period all claims were studied at the time of reporting, when annexed radiographs and so forth could be analyzed. One hundred and thirty-six claims were recorded with regard to treatment injury, reasons for remake, latency times from cementation or delivery to diagnosis, and details about the teeth or constructions involved in the claim. The dentist's opinion of the cause of the failure was also recorded. The reports covered treatment injuries, most of them root perforations during preparation for a post. The guarantee claims for single crowns concerned porcelain fractures, loss of retention, and root fractures as the most frequent failures. For fixed partial dentures the failures were recorded as loss of retention, porcelain fractures, tooth or root fractures, and metal framework fractures in that order. The dentist gave information about his/her opinion of the reason for the failure in only 38.5% of the claims. There were, however, no clear findings about the reasons for the failures.
瑞典患者保险计划包括一项假牙修复治疗保证保险。对于固定义齿粘结后长达2年以及可摘义齿交付后1年内的失败修复治疗，保证保险计划予以承保。在1989年进行这项研究时，几乎所有私人执业医生都纳入了该计划。在特定时期内，对所有索赔进行了研究，当时可以分析附带的X光片等资料。记录了136起关于治疗损伤、重新制作原因、从粘结或交付到诊断的延迟时间以及索赔所涉及牙齿或修复体详细情况的索赔案例。还记录了牙医对失败原因的看法。这些报告涵盖了治疗损伤，其中大多数是在制备桩时发生的牙根穿孔。单冠的保证索赔中，最常见的失败情况是瓷裂、固位丧失和牙根骨折。对于固定局部义齿，失败情况按顺序记录为固位丧失、瓷裂、牙齿或牙根骨折以及金属支架骨折。在仅38.5%的索赔案例中，牙医提供了其对失败原因的看法。然而，关于失败原因并没有明确的调查结果。
