External root resorption in maxillary and mandibular second molars associated with impacted third molars: a cone-beam computed tomographic study
External root resorption in maxillary and mandibular second molars associated with impacted third molars: a cone-beam computed tomographic study
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与阻生第三磨牙相关的上颌和下颌第二磨牙的外根吸收：锥形束计算机断层扫描研究。
DOI：
10.1007/s00784-019-02859-3
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发表时间：
2019-12-01
影响因子：
3.4
通讯作者：
Hu, Xiaoli
中科院分区：
文献类型：
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作者：
Li, Danna;Tao, Yiwei;Hu, Xiaoli
目的分别探讨与阻生第三磨牙相邻的上颌第二磨牙（M2s）和下颌第二磨牙（M2s）外根吸收（ERR）的发生率及危险因素。材料与方法对184例上颌和323例下颌阻生m3进行CBCT扫描。评估年龄、性别、M3的影响状况、M2中ERR的存在、严重程度和位置。多因素logistic回归分析确定危险因素。结果上颌M2s患病率为32.6%，下颌骨M2s患病率为52.9% （P < 0.001）。中角M3s和深阻生M3s被认为是上颌和下颌M3s发生ERR的危险因素（P < 0.05）。年龄大于25岁的上颌M2s发生ERR的风险增加（P < 0.05）。上颌M2s总体上较下颌骨M2s严重（P < 0.001）。上颌M2s ERR多发生在根尖三分之一，下颌骨M2s ERR多发生在颈三分之一。结论ERR发生在毗邻M3s的M3s，尤其是下颌M3s。上颌M2s ERR因其严重程度较高，不容忽视。M3的中位成角和撞击深度与M2s的ERR显著相关。对于上颌M2s的ERR，年龄是另一个预测参数。
Objective To separately investigate the prevalence and risk factors of external root resorption (ERR) in maxillary and mandibular second molars (M2s) adjacent to impacted third molars (M3s).Materials and methods CBCT scans involving 184 maxillary and 323 mandibular impacted M3s were included. Age, gender, the impaction status of M3, the presence, severity, and location of ERR in M2 were assessed. Risk factors were identified by multivariate logistic regression analyses.Results The prevalence of ERR was 32.6% in maxillary and 52.9% in mandibular M2s (P < 0.001). Mesio-angulated and deeply impacted M3s were identified as risk factors for both ERR in maxillary and mandibular M2s (P < 0.05). Besides, age over 25 increased the risk of ERR in maxillary M2s (P < 0.05). ERR in maxillary M2s was overall more severe than that in mandibular M2s (P < 0.001). For maxillary M2s, ERR mostly occurred at the apical third, while the mandibular M2s ERR was most frequently detected at the cervical third.Conclusions ERR occurring in M2s adjacent to impacted M3s is common, especially in mandibular M2s. ERR in maxillary M2s cannot be neglected because of its relatively high severity. Mesial angulation and impaction depth of M3 are significantly associated with ERR in M2s. For ERR in maxillary M2s, age is another predictive parameter.