Martin J A, Bader J D
Permanente Dental Associates, Portland, OR 97322-2099, USA.
Oper Dent. 1997 Mar-Apr;22(2):72-8.
For 4735 posterior complex amalgams and crowns placed in adults with continuous dental HMO coverage, all additional treatment received over the subsequent 5 years was determined. The restorations were placed under routine clinical conditions by 74 different dentists among a broad spectrum of insured dental patients. Treatment outcomes were described in terms of a hierarchical classification of additional treatments. At the extremes, a successful outcome was defined as no additional treatment or an additional one- or two-surface restoration on the same tooth, and a catastrophic outcome as extraction or endodontic treatment. Due to clinical protocols, teeth with guarded to poor prognosis prior to treatment are overrepresented in the five-surface amalgam cohort. Successful outcomes characterized 72% of four-surface amalgams, 65% of five-surface amalgams, 84% of gold crowns, and 84% of porcelain crowns. Catastrophic outcomes occurred for 10% of four-surface amalgams, 15% of five-surface amalgams, 8% of gold crowns, and 9% of porcelain crowns.
对于4735例为有持续牙科健康维护组织（HMO）保险的成年人所放置的后牙复合汞合金充填体和牙冠，确定了在随后5年中接受的所有额外治疗。这些修复体是由74位不同的牙医在广泛的参保牙科患者中按照常规临床条件放置的。治疗结果按照额外治疗的分级分类进行描述。在极端情况下，成功的结果定义为无需额外治疗或对同一颗牙齿进行额外的单面或双面修复，而灾难性的结果定义为拔牙或根管治疗。由于临床方案的原因，在五面汞合金充填体队列中，治疗前预后可疑至较差的牙齿比例过高。四面汞合金充填体的成功率为72%，五面汞合金充填体为65%，金冠为84%，瓷冠为84%。四面汞合金充填体的灾难性结果发生率为10%，五面汞合金充填体为15%，金冠为8%，瓷冠为9%。
