Abstract：
BACKGROUND: Often there is the need of moving endodontically treated teeth. Orthodontic movement may have no effect on the prognosis of teeth with root canal treatment (RCT). To verify this subject, we evaluated the effect of orthodontic movement on the prognosis of RCT teeth using cone-beam computed tomography (CBCT) and further explored the influence of orthodontic movement on the prognosis of RCT teeth with and without apical periodontitis (AP).
METHODS: This retrospective study was conducted by evaluating 169 RCT teeth of 100 patients who had undergone fixed orthodontic treatment. AP was assessed and classified using the CBCT periapical index. Univariate analysis of RCT outcome was performed for the total RCT group, RCT without AP group and RCT with AP group. Multivariate logistic regression was performed for the total RCT group and RCT without AP group, respectively, but not for the RCT with AP group. Variables related to the prognosis of RCT were included, such as age, gender, tooth position, RCT quality, coronal restoration quality, periodontal condition, orthodontic traction distance, and orthodontic rotation angle.
RESULTS: The orthodontic traction distance and rotation angle were not significantly correlated to the RCT outcomes, regardless of the presence of AP. Among the total RCT group, teeth with unqualified RCT (odds ratio = 3.42, P = .004) and inadequate coronal restoration (odds ratio = 4.40, P = .031) had a lower success rate. Of the 97 RCT teeth without AP, unqualified RCT was a risk factor for treatment failure (odds ratio = 3.55, P = .041). Of the 72 RCT teeth with AP, the univariate analysis showed that RCT quality were significantly related to the outcome (P = .042).
CONCLUSIONS: Orthodontic movement had no effect on the prognosis of RCT teeth regardless of the presence of AP.
METHODS: This retrospective study was conducted by evaluating 169 RCT teeth of 100 patients who had undergone fixed orthodontic treatment. AP was assessed and classified using the CBCT periapical index. Univariate analysis of RCT outcome was performed for the total RCT group, RCT without AP group and RCT with AP group. Multivariate logistic regression was performed for the total RCT group and RCT without AP group, respectively, but not for the RCT with AP group. Variables related to the prognosis of RCT were included, such as age, gender, tooth position, RCT quality, coronal restoration quality, periodontal condition, orthodontic traction distance, and orthodontic rotation angle.
RESULTS: The orthodontic traction distance and rotation angle were not significantly correlated to the RCT outcomes, regardless of the presence of AP. Among the total RCT group, teeth with unqualified RCT (odds ratio = 3.42, P = .004) and inadequate coronal restoration (odds ratio = 4.40, P = .031) had a lower success rate. Of the 97 RCT teeth without AP, unqualified RCT was a risk factor for treatment failure (odds ratio = 3.55, P = .041). Of the 72 RCT teeth with AP, the univariate analysis showed that RCT quality were significantly related to the outcome (P = .042).
CONCLUSIONS: Orthodontic movement had no effect on the prognosis of RCT teeth regardless of the presence of AP.
摘要：
背景：目的：通常需要移动牙髓治疗的牙齿。正畸运动可能对根管治疗（RCT）牙齿的预后没有影响。要验证此主题，我们使用锥形束计算机断层扫描（CBCT）评估了正畸移动对RCT牙齿预后的影响，并进一步探讨了正畸移动对有或无根尖周炎（AP）的RCT牙齿预后的影响。
方法：这项回顾性研究是通过评估100例接受固定正畸治疗的患者的169颗RCT牙齿进行的。使用CBCT根尖周指数对AP进行评估和分类。对总RCT组的RCT结果进行单因素分析，RCT无AP组及RCT伴AP组。对总RCT组和无AP的RCT组进行多因素logistic回归分析。分别,但不适用于AP组的RCT。包括与RCT预后相关的变量，比如年龄,性别,齿位置,RCT质量,日冕修复质量，牙周状况，正畸牵引距离,和正畸旋转角度。
结果：正畸牵引距离和旋转角度与RCT结果无显著相关性，无论AP的存在。在整个RCT组中，RCT不合格（OR=3.42，P=0.004）和冠状修复不足（OR=4.40，P=0.031）的牙齿成功率较低。在97颗没有AP的RCT牙齿中，不合格的RCT是治疗失败的危险因素(OR=3.55,P=0.041)。在患有AP的72颗RCT牙齿中，单因素分析显示RCT质量与结局显著相关(p=0.042).
结论：无论是否存在AP，正畸移动对RCT牙齿的预后均无影响。
方法：这项回顾性研究是通过评估100例接受固定正畸治疗的患者的169颗RCT牙齿进行的。使用CBCT根尖周指数对AP进行评估和分类。对总RCT组的RCT结果进行单因素分析，RCT无AP组及RCT伴AP组。对总RCT组和无AP的RCT组进行多因素logistic回归分析。分别,但不适用于AP组的RCT。包括与RCT预后相关的变量，比如年龄,性别,齿位置,RCT质量,日冕修复质量，牙周状况，正畸牵引距离,和正畸旋转角度。
结果：正畸牵引距离和旋转角度与RCT结果无显著相关性，无论AP的存在。在整个RCT组中，RCT不合格（OR=3.42，P=0.004）和冠状修复不足（OR=4.40，P=0.031）的牙齿成功率较低。在97颗没有AP的RCT牙齿中，不合格的RCT是治疗失败的危险因素(OR=3.55,P=0.041)。在患有AP的72颗RCT牙齿中，单因素分析显示RCT质量与结局显著相关(p=0.042).
结论：无论是否存在AP，正畸移动对RCT牙齿的预后均无影响。
