Benisha R Evelyn, Piriyanga Rathna, Sherwood I Anand, Ramanathan Indhra S, Abirami A Azhagu
Departments of Conservative Dentistry and Endodontics, CSI College of Dental Sciences and Research, Madurai, Tamil Nadu, India.
J Conserv Dent Endod. 2025 May;28(5):468-473. doi: 10.4103/JCDE.JCDE_153_25. Epub 2025 May 6.
The aim of the study was to compare the survival and success rates of metal onlays and crowns in root canal-treated first and second molars with single proximal defects.
A total of 120 patients requiring post-endodontic restoration of molars were randomly assigned into two groups ( = 60 each): metal onlays and metal crowns. Restorations were fabricated using standard protocols and cemented with glass ionomer cement. Patients were followed up for 18 months, with survival defined as the presence of an intact restoration and success as the absence of food impaction. To indicate success, revised FDI criteria are used.
Kaplan-Meier survival analysis was performed to evaluate the restoration survival rate; the Chi-square test was used to compare categorical variables.
Kaplan-Meier analysis showed a survival rate of 95% for onlays and 90% for crowns, with no significant difference ( = 0.294). Success rates were 91.7% for onlays and 90.0% for crowns with no significant difference ( = 0.604). Food impaction was more common when the pretreatment restoration margin was apical to the cementoenamel junction, though not statistically significant ( = 0.167).
Metal onlays and crowns exhibited comparable survival and success rates in root canal-treated first and second molars with single proximal defects.
本研究旨在比较根管治疗后的第一和第二磨牙单近中缺损采用金属高嵌体和全冠修复后的生存率和成功率。
总共120例需要对磨牙进行根管治疗后修复的患者被随机分为两组（每组n = 60）：金属高嵌体组和金属全冠组。修复体按照标准流程制作，并用玻璃离子水门汀粘固。对患者进行18个月的随访，修复体完整存在定义为生存，无食物嵌塞定义为成功。采用修订的FDI标准来判定成功与否。
采用Kaplan-Meier生存分析评估修复体的生存率；采用卡方检验比较分类变量。
Kaplan-Meier分析显示，高嵌体的生存率为95%，全冠为90%，差异无统计学意义（P = 0.294）。高嵌体的成功率为91.7%，全冠为90.0%，差异无统计学意义（P = 0.604）。当治疗前修复边缘位于牙骨质牙釉质界根尖侧时，食物嵌塞更常见，但差异无统计学意义（P = 0.167）。
在根管治疗后的第一和第二磨牙单近中缺损修复中，金属高嵌体和全冠的生存率和成功率相当。
