194例根尖周外科病例的生存分析

Assessment of survival function of 194 endodontic surgery

目的:评估194例根尖周外科病例的生存功能。方法:1991—2001年实行根尖周手术的患牙共194个被回访,在一套严格的标准下进行临床和X线检查。用Kap lan-M e ier方法和Log rank test来评估生存时间。用Cox回归分析混杂因素进行分析。结果:到回访时为止,154个初次手术牙齿的生存时间中位数是92.1个月[95%可信限区间(confidence interval,C.I.)=40.9,143.4],40个再次手术的牙齿生存时间中位数是39.1个月(95%C.I.=6.1,72.1);两组之间的生存时间具有显著性差异(P<0.05)。初次手术的牙齿,术前牙槽骨的边缘丧失高度和术者对生存时间具有显著性影响(P<0.05)。结论:根尖周手术的生存随时间延长呈非线性下降,术前牙槽骨的边缘丧失高度、术者和再手术是根尖手术生存的重要影响因素。

AIM：To assess the survival function of 194 endodontie surgery. METHODS： 194 surgically treated teeth between 1991 and 2001 were recalled and examined clinically and radiographically using a set of strict criteria. The Kaplan - Meier method and log rank test were used to evaluate the survival time, Confounded factors were ex- amined by Cox regression analysis, RESULTS：The median survival time of the 154 first - time surgically treated teeth was 92, 1 months （95% C. I, = 40.9,143,4） and that of the 40 re - surgical cases was 39.1 montbs （95% C.I. = 6.1,72, 1 ） up to the date of recall. There was a significant difference in the survival time between the two groups, For cases after first - time surgery,the ple - operative marginal bone loss and the operator had significant influence on the survival time （P 〈0.05）. CONCLUSION：The survival time of surgical endodontic treatment declined non- linearly with time, The preoperative marginal bone loss,operator and re - surgery were important factors affecting the survival of this treatment modality.