正畸前移第二磨牙关闭第一磨牙间隙的临床疗效分析  

Clinical Effects of Orthodontic Treatment with the Second Molar Forward to Close Thespace of the Lost First Molar

作　　者：李春霞[1,2] 周思颖 米丛波 LI Chunxia;ZHOU Siying;MI Congbo(Department of Orthodontics,the First Affiliated Hospital of Xinjiang Medical University,Urumqi 830011,Xinjiang,China;Stomatology Institute of Xinjiang,Urumqi 830011,Xinjiang,China)

机构地区：[1]新疆医科大学第一附属医院(附属口腔医院)口腔正畸科,新疆乌鲁木齐830011 [2]新疆维吾尔自治区口腔医学研究院,新疆乌鲁木齐830011

出　　处：《中国美容医学》2023年第12期132-135,共4页Chinese Journal of Aesthetic Medicine

基　　金：新疆维吾尔自治区科技厅资助项目(编号:2016D01C247)。

摘　　要：目的:探讨第一磨牙严重龋坏或者缺失后,通过正畸前移第二磨牙关闭第一磨牙缺隙的临床疗效。方法:采用直丝弓矫治技术,前移第二磨牙关闭由第一磨牙严重龋坏拔除或缺失造成缺隙的错牙合畸形患者22例,通过在曲面断层片上测量第二前磨牙与第二磨牙牙体长轴成角评价牙根平行情况,并观察第二磨牙牙根吸收和牙槽骨改建情况。结果:第二磨牙全部前移并关闭第一磨牙缺隙,第三磨牙排齐或待萌出,患者牙列咬合关系良好,软组织侧貌协调。矫治完成时间平均(24.8±4.3)个月。治疗后,第二前磨牙牙根基本平行于第二磨牙牙根,两牙齿牙体长轴成角减小,差异具有统计学意义(P<0.05)。结论:第一磨牙病损或者缺失的错牙合畸形,第三磨牙(或牙胚)存在时,正畸前移第二磨牙关闭第一磨牙间隙是临床可行的治疗方法。Objective To investigate the clinical effect of the orthodontic treatment which have severe caries or loss of the first molar,by forward the second molar to close the missing gap of the first molar.Methods 22 cases of malocclusion with severe caries or loss of the first molar were treated with straight wire appliance.The root parallelism was evaluated by measuring the angulations between the long axis of the second premolar and the second molar on panoramic radiograph,and the root resorption and alveolar bone remodeling of the second molar were observed.Results The second molars were successfully replaced first molar position,patients get nice occlusion,normal overbite and overjet,soft tissue profile coordinate.The average treatment time was(24.8±4.3)months.The roots of the second premolars and the second molarswere basically parallel after treatment,and the long axis angulationsof the two teeth decreased,the difference was statistically significant(P<0.05).Conclusion Mesial movement of second molar treatment is clinically feasible when malocclusion patients with lesion or deletion of the first molar have the third molar or dental germ.

关 键 词：正畸 磨牙龋坏 磨牙缺失 磨牙前移 直丝弓矫治技术 

分 类 号：R783.5[医药卫生—口腔医学]