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CBCT评估成人正畸治疗中前牙牙根吸收情况的前瞻性研究
作者:周丹  李阳飞  梁晓伟  秦晗 
单位:连云港市第一人民医院 口腔医院, 江苏 连云港 222002
关键词:锥形束电子计算机断层扫描 正畸治疗 牙根吸收 前瞻性研究 
分类号:R783.5;R816.98
出版年·卷·期(页码):2017·36·第四期(529-533)
摘要:

目的:探索成人正畸治疗中前牙牙根吸收的发生率和严重程度。方法:对65例安氏Ⅰ类错颌畸形患者(共390颗前牙)正畸治疗过程中前牙进行3次锥形束电子计算机断层扫描(CBCT)追踪检查(治疗前、治疗6个月及治疗结束),比较治疗前到治疗6个月、治疗6个月到治疗结束这两阶段牙根吸收情况。结果:在治疗6个月时,牙根吸收大于1 mm在侧切牙中出现的频率最高。在治疗结束时,侧切牙发生牙根吸收大于1 mm的频率最高,其次是上颌中切牙。牙根出现吸收大于4 mm的情况仅出现于上颌中切牙和上颌侧切牙。92.3%的患者出现了至少1个牙超过1 mm的牙根吸收,6.15%的患者出现了1个或多个牙根吸收大于4 mm的情况。除外下颌侧切牙,其他患牙在治疗6个月后均出现了更为明显的牙根吸收,其中上颌侧切牙的牙根吸收增加具有统计学意义。结论:CBCT评价牙根吸收是一个有效而精确的手段。绝大多数正畸矫治患者均出现了不同程度的牙根吸收。

Objective:To investigate the incidence and severity of root resorption in adult orthodontic treatment. Methods:Roots of 390 anterior teeth in 65 patients with class Ⅰ malocclusion were assessed using cone-beam computed tomography (CBCT) at pre-treatment, 6-month treatment and post-treatment. Results:Root shortening >1 mm was found more frequently in lateral incisors after 6 months' treatment. At endpoint, root shortening >1 mm was also seen more frequently in lateral incisors, and followed by upper central incisors. Root shortening >4 mm were only found in upper central incisors and upper lateral incisors. 92.3% of patients had at least one root with shortening >1 mm, and 6.15% had one or more teeth with shortening >4 mm. All teeth showed more obviously root shortening after 6-month treatment than before, except for the lower lateral incisors. Statistically significant difference was only found in the upper lateral incisor. Conclusions:Most patients showed different degree of root resorption during orthodontic treatment, and CBCT is an effective and accurate method for the evaluation of root resorption.

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