成人骨性Ⅱ类错[牙合]矫治前后上颌前牙牙根吸收的研究  

Study on root resorption of maxillary anterior teeth before and after treatment of adult skeletal Class Ⅱ malocclusion

作　　者：马燕[1] 朱道俣 张春霞[3] 陶李明[2] MA Yan;ZHU Daoyu;ZHANG Chunxia;TAO Liming(Department of Orthodontics,The First People’s Hospital of Hefei or The Third Affiliated Hospital of Anhui Medical University,Hefei 230001,China)

机构地区：[1]合肥市第一人民医院,安徽医科大学第三附属医院正畸科,安徽合肥230001 [2]安徽医科大学合肥口腔临床学院,合肥市口腔医院正畸二科,安徽合肥230001 [3]安徽医科大学合肥口腔临床学院,合肥市口腔医院西区颌面外科,安徽合肥230001

出　　处：《口腔医学》2023年第9期814-818,共5页Stomatology

摘　　要：目的 探讨成人骨性Ⅱ类矫治前后上颌前牙牙根吸收的影响。方法 选取在正畸科完成的成人骨性前突患者20例,均于矫治前及矫治后拍摄CBCT,采用三维重建技术通过颜色编码图评估正畸患者前牙根表面的变化,测量上切牙的牙根长度和牙根体积,计算牙根吸收量。结果 成人骨性前突患者拔牙矫治后各上颌切牙的牙根长度和牙根体积均明显减小(P<0.05),其中女性的牙根长度和体积吸收量明显大于男性(P<0.05),中切牙的牙根体积吸收量大于侧切牙(P<0.05),但矫治后上颌各切牙之间长度和体积无显著性差异(P>0.05)。结论 成人骨性前突患者固定矫治后牙根的长度和体积均有减少,上切牙牙根吸收受骨性畸形程度、性别等因素影响,女性牙根吸收相对更多。Objective To investigate the effect of root resorption of maxillary anterior teeth from adult patients with skeletal ClassⅡmalocclusion before and after orthodontic treatment.Methods A total of 20 adult patients with bone protrusion who had undergone treatment in the orthodontic department were selected and all had CBCT taken before and after orthodontic treatment.The changes in the root surface of the anterior teeth of orthodontic patients were assessed by colour-coded maps using 3D reconstruction techniques.The root length and root volume of the upper incisors were measured and the amount of root resorption was calculated.Results Adult patients with bone protrusion had a significant reduction in root length and volume of each maxillary incisor after extraction(P<0.05),with women having significantly greater root length and volume resorption than men(P<0.05).The mesial incisors had greater root volume resorption than the lateral incisors(P<0.05),but there was no significant difference in length and volume between the maxillary incisors after treatment(P>0.05).Conclusion The length and volume of the roots of adult bone protrusions are reduced after fixed orthodontic treatment.Root resorption in the upper incisors is influenced by the degree of bone malformation and gender,with women experiencing a greater reduction in roots compared to men.

关 键 词：骨性Ⅱ类错[牙合] 牙根吸收 牙根体积 

分 类 号：R783.5[医药卫生—口腔医学]