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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 被引量:9

Evaluation of anterior root resorption in orthodontic treatment using cone-beam computed tomography: a prospective study
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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.
出处 《东南大学学报(医学版)》 CAS 北大核心 2017年第4期529-533,共5页 Journal of Southeast University(Medical Science Edition)
基金 国家自然科学基金资助项目(81500893)
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 cone-beam computed tomography orthodontic treatment root resorption a prospective study
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