Department of Operative Dentistry and Endodontics, Mahidol University Faculty of Dentistry, Bangkok, Thailand.
Department of Community Dentistry, Mahidol University Faculty of Dentistry, Bangkok, Thailand.
Eur Endod J. 2022 Mar;7(1):27-32. doi: 10.14744/eej.2021.21939.
The purpose of this study was to evaluate the effect of coronal restorations on the survival rates against fracture of endodontically treated premolars with exposed cervical lesions and to identify the prognostic factors for fracture.
Data of the endodontically treated premolars with exposed cervical lesions restored with resin composites or crowns between 2011 and 2020 were collected. The presence of a fracture was recorded, and the possible prognostic factors were recorded. Statistical analyses were performed, with a significance level of P<0.05, using a Kaplan-Meier survival analysis, log-rank tests, and Cox proportional hazard models were used to identify the prognostic factors.
The survival rates against fracture were not significantly different between the teeth restored with crowns (93.3%) or resin composites (86%) (P≥0.05). A high frequency of non-restorable fractures was observed in both groups. Crestal bone reduction to the middle-third of the root was identified as the significant prognostic factor (P<0.05).
For endodontically treated premolars with exposed cervical lesions, resin composite restorations provided a high comparable survival rate that was comparable to that of crowns. A higher risk of fracture was found in endodontically treated premolars with crestal bone loss to the middle-third of the root.
本研究旨在评估针对颈侧暴露的牙髓治疗后前磨牙，行冠修复对其抗折裂生存率的影响，并确定折裂的预测因素。
收集了 2011 年至 2020 年间行颈侧暴露的牙髓治疗后前磨牙树脂复合材料或冠修复的病例资料。记录了折裂的发生情况，并记录了可能的预测因素。采用 Kaplan-Meier 生存分析、对数秩检验和 Cox 比例风险模型进行统计分析，P<0.05 为差异有统计学意义，用于确定预测因素。
行冠修复（93.3%）和树脂复合材料修复（86%）的牙齿折裂生存率无显著差异（P≥0.05）。两组均观察到较高频率的不可修复性折裂。根中 1/3 处颊侧骨高度降低被确定为显著的预测因素（P<0.05）。
对于颈侧暴露的牙髓治疗后前磨牙，树脂复合材料修复的生存率与冠修复相当。根中 1/3 处颊侧骨丧失的牙髓治疗后前磨牙折裂风险较高。
