切牙回收对双颌前突患者矫治后软组织侧貌变化影响的线性相关分析  

Linear Correlation Between Retraction of Incisors and Soft Tissue Profile Changes in Patients with Bimaxillary Protrusion after Treatment

作　　者：李紫薇 付彧 史航 赵梦晗 刘宇妍 汪洋[1] 史瑞新[1] LI Ziwei;FU Yu;SHI Hang;ZHAO Menghan;LIU Yuyan;WANG Yang;SHI Ruixin(Department of Orthodontics,Hospital of Stomatology,Jilin University,Changchun 130021,China)

机构地区：[1]吉林大学口腔医院正畸科,吉林长春130021

出　　处：《口腔医学研究》2023年第2期129-134,共6页Journal of Oral Science Research

基　　金：吉林省卫生计生委项目(编号:2017s028)。

摘　　要：目的:研究前牙回收对双颌前突患者软组织侧貌的影响,并得到二者之间精准的线性回归模型,为正畸医师治疗计划的制定提供参考。方法:受试者选自2012年2月~2019年4月来吉林大学口腔医院正畸科就医的48例女性患者,均正畸治疗拔除4颗前磨牙。对矫治前后的头部侧位片进行定点测量,并建立坐标轴:一条过蝶鞍点(sella,S点)且比前颅底平面(SN平面)低7°的水平参考线(SN-7°)作为X轴,以S点为垂点作X轴的垂线作为Y轴,对相关软硬组织的头影测量指标进行测量并进行多元逐步后退回归分析,得出软硬组织变化之间的线性关系精准模型。结果:矫治结束后,上下唇以及鼻唇角矫治前后差异均有统计学意义,颏唇角矫治前后差异无统计学意义;多元逐步后退回归分析:上切牙切缘回收量对上唇突点(Beta=0.509)和下唇突点(Beta=0.635)的回收均影响最大,上切牙切缘和上唇回收的比例为2.2∶1,上切牙切缘和下唇回收的比例为2∶1,下切牙切缘垂直向的变化对上唇(Beta=0.367)和下唇突点(Beta=0.567)的垂直向变化均影响最大。下颌平面角的减小会引起颏部软组织的前移。结论:拔牙矫治可以有效改善凸面型,对比下切牙来说,上切牙的回收对于下唇的变化影响最大,上切牙切缘的变化是影响唇部软组织变化的关键,下颌平面的逆旋可以掩饰颏部发育不全,但是单纯拔牙并不能让颏部发生显著变化。Objective:To study the effect of anterior tooth retraction on soft tissue profile of patients with bimaxillary protrusion and to obtain an accurate linear regression model.Methods:Forty-eight patients extracted four premolars who attended the orthodontic department of Jilin University Stomatology Hospital from February 2012 to April 2019 were selected.The coordinate axes were established,the horizontal reference plane was registered on sella(S)and oriented 7°inferior to the sellanasion(S-N)line as the X-axis,and the perpendicular line through S as the Y-axis(positive values were taken on the right side of the Y-axis and below the X-axis).Cephalometric parameters of related soft and hard tissues were measured and multiple stepwise regression analysis was performed to obtain an accurate linear relationship model between the changes of soft and hard tissues.Results:At the end of the orthodontic treatment,the differences between the upper and lower lips and the nasolabial angle were statistically significant before and after the orthodontic treatment,while the differences between the chinlabial angle before and after the orthodontic treatment were not statistically significant.The sagittal changes of the pogonion of soft tissue,gnathion of soft tissue and menton of soft tissue were all weakly negatively correlated with the occlusal plane angle,the sagittal changes of the pogonion of soft tissue and gnathion of soft tissue were all moderately negatively correlated with the MP-SN angle,the sagittal changes of the menton of soft tissue was negatively correlated with the MP-SN angle.Multivariate stepwise regression analysis:retraction of upper incisor incisal had the greatest effect on both upper lip(Beta=0.509)and lower lip(Beta=0.635)recovery,and the ratio of between the retraction of upper incisor incisal and upper lip was about 2.2∶1.The vertical change of the incisor of the lower incisor had the greatest effect on the vertical change of the upper lip(Beta=0.367)and the lower lip(Beta=0.567).The reduction of the m

关 键 词：软组织侧貌 牙移动 拔牙 双颌前突 

分 类 号：R783.5[医药卫生—口腔医学]