Stavropoulou A F, Koidis P T
Department of Fixed Prosthesis and Implant Prosthodontics, School of Dentistry, University Campus, Dentistry Building, GR 54124 Thessaloniki, Greece.
J Dent. 2007 Oct;35(10):761-7. doi: 10.1016/j.jdent.2007.07.004. Epub 2007 Sep 5.
To test the hypothesis that the placement of a crown is associated with improved (long term) survival of root canal treated teeth, using a systematic review process of clinical studies.
Papers referring to single crowns on endodontically treated teeth were located by a MEDLINE search and hand searching. One thousand six hundred and nine references were found, and they were subjected to a systematic review procedure.
A three-step inclusion-exclusion procedure was applied to identify papers that represented; good scientific practice (GSP), reported results of all patients, restorations on root canal treated teeth (RCT) for more than 2 years and had sufficient data to generate life table analyses. The outcomes were 'survival of RCT restored with crowns' and 'survival of RCT with direct restorations'. Ten studies survived. These data showed an overall mean GSP of 0.605 with a 10-year survival of 81% for crowned RCT and a 10-year survival of 63% for RCT with direct restorations (resin composites, amalgam, cements).
RCTs restored with crowns show an acceptable long-term survival of 10 years, while direct restorations have a satisfactory survival only for a short period.
采用临床研究的系统评价方法，检验牙冠修复与根管治疗后牙齿（长期）存活率提高相关这一假设。
通过医学文献数据库检索及手工检索，查找有关根管治疗后牙齿单冠修复的论文。共找到1609篇参考文献，并对其进行系统评价。
采用三步纳入-排除程序，以确定代表良好科学实践（GSP）、报告所有患者结果、对根管治疗后牙齿进行超过2年修复（RCT）且有足够数据进行生命表分析的论文。结果指标为“牙冠修复的根管治疗牙齿的存活率”和“直接修复的根管治疗牙齿的存活率”。筛选出10项研究。这些数据显示，总体平均GSP为0.605，牙冠修复的根管治疗牙齿10年存活率为81%，直接修复（树脂复合材料、汞合金、水门汀）的根管治疗牙齿10年存活率为63%。
牙冠修复的根管治疗牙齿显示出10年可接受的长期存活率，而直接修复仅在短期内有令人满意的存活率。
