锥形束CT对安氏Ⅰ～Ⅲ类错颌畸形正畸治疗中牙根吸收的诊断价值  

Diagnostic value of cone-beam CT for root resorption in orthodontic treatment of Angle′s Class Ⅰ to Ⅲ malocclusion

作　　者：罗成[1] 杨馥榕 雷延颖 LUO Cheng;YANG Fu-rong;LEI Yan-ying(Department of StomatologyQinghai University Affiliated Hospital, Xining, Qinghai 810000, China)

机构地区：[1]青海大学附属医院口腔科

出　　处：《中国临床研究》2019年第7期972-975,共4页Chinese Journal of Clinical Research

基　　金：青海省科技计划项目(2015ZJ759)~~

摘　　要：目的探讨锥形束CT在安氏Ⅰ~Ⅲ类错颌畸形正畸治疗中牙根吸收中的应用价值。方法选取2013年2月至2016年10月收治的72例错颌畸形患者,分别接受锥形束CT检查及数字化曲面体层X线摄影检查,检查结束后给予所有患者正畸治疗,并再次实施锥形束CT检查。以X线头影测量分析结果作“金标准”,统计分析两种诊断方法在不同程度牙根吸收中的诊断结果、治疗前后牙根体积锥形束CT测量结果变化情况及错颌畸形正畸治疗前后锥形束CT表现。结果经X线头影测量得知,本组72例患者中,正畸治疗后无牙根吸收19例,轻度牙根吸收21例,中度牙根吸收18例,重度牙根吸收14例;锥形束CT检查对牙根吸收与X线头影测量的总符合率为87.50%(63/72),较曲面体层片检查[56.94%(41/72)]高,差异有统计学意义(P<0.01);锥形体CT检查示,治疗后72例患者右下侧切牙、右下中切牙、左下侧切牙、左下中切牙、左上侧切牙、左上中切牙、右上侧切牙、右上中切牙体积较治疗前减小,差异有统计学意义(P均<0.01)。结论安氏Ⅰ~Ⅲ类错颌畸形患者正畸治疗后通常会出现不同程度牙根吸收,经锥形束CT检查可有效检出并辨别牙根吸收程度及牙根体积变化情况,可为临床制定进一步干预方案提供参考依据。Objective To investigate the diagnostic value of cone-beam CT for root resorption in the orthodontic treatment of Angle′s Class Ⅰ to Ⅲ malocclusion.Methods A total of 72 patients with malocclusion who received treatment from February 2013 to October 2016 were selected and examined by cone-beam CT and digital panoramic tomography,respectively.All patients were given orthodontic treatment after the examination,and cone-beam CT was performed after the treatment.The results of X-ray cephalometric analysis were used as the "gold standard" to analyze the diagnostic results of two diagnostic methods in different degrees of root resorption,the changes of cone-beam CT measurement results of root volume before and after treatment,and the cone-beam CT manifestations of malocclusion before and after orthodontic treatment.Results X-ray cephalometry showed that among 72 patients,19 had no root resorption,21 had mild root resorption,18 had moderate root resorption and 14 had severe root resorption after orthodontic treatment.The total coincidence rate between cone-beam CT and X-ray cephalometry was 87.50%(63/72),which was significantly higher than that of digital panoramic tomography[56.94%(41/72),P<0.01].Cone-beam CT showed that the volume of right lower incisors,right lower central incisors,left lower incisors,left lower central incisors,left upper incisors,left upper central incisors,right upper incisors and right upper central incisors decreased after treatment in 72 patients(all P<0.01).Conclusions After orthodontic treatment,patients with Angle′s Class Ⅰ-Ⅲ malocclusion usually have different degrees of root resorption.Cone-beam CT can effectively detect and distinguish the degree of root resorption and the change of root volume,which can provide a reference for further clinical intervention.

关 键 词：电子计算机X线断层扫描 锥形束 安氏Ⅰ~Ⅲ类错颌畸形 正畸治疗 牙根吸收 

分 类 号：R644[医药卫生—外科学]