下颌后牵与颌间牵引和上腭中后1/3处椭圆基板前向力矫治术对安氏Ⅲ类错颌的正畸效果观察  

Observation on orthodontic effect of class Ⅲ malocclusion

作　　者：祁小菊 

机构地区：[1]甘肃省庆阳市妇幼保健院口腔科,甘肃庆阳745000

出　　处：《医药前沿》2022年第31期11-14,共4页Journal of Frontiers of Medicine

摘　　要：目的:观察下颌后牵引、颌间牵引、上腭中后1/3处椭圆形透明基板上持续前向力矫治术对安氏Ⅲ类错颌的正畸效果及面型的变化。方法:选取2020年2月—2021年9月甘肃省庆阳市妇幼保健院收治的36例安氏Ⅲ类错颌患者,进行下颌后牵、颌间牵引、上腭中后1/3处椭圆形透明基板上持续前向力观察,对安氏Ⅲ类错牙合的正畸效果。并拍摄矫正前和矫正后头颅侧位片进行头影测量,观察软硬组织变化情况。结果:矫治后患者SNA角、ANB角、U1-NA角、U1-NA距、U1-FH角、ULP值较治疗前变大,差异有统计学意义(P<0.05);SNB角、OP-FH角、U1-L1角小于治疗前,差异有统计学意义(P<0.05)。结论:安氏Ⅲ类错牙合患者采用上腭中后1/3处椭圆形透明基板上持续前向力,上颌后牙透明牙合垫,下颌后牵引,这样诱导上颌骨前向发育,甚至可以诱导鼻根点N点前向发育,诱导下颌后缩;在前牙反牙合纠正之后,撤除牙合垫,颌间牵引、上腭透明基板持续前向力既可诱导发育不良的鼻根部、鼻底部前向发育,又可诱导下颌后缩,在拔牙的病例中还可关闭间隙,可有效纠正反牙合,调整覆牙合,覆盖,改善患者下颌前突、上颌后缩的面型,效果良好。Objective To investigate the orthodontic effect of mandibular posterior traction,intermaxillary traction,and continuous forward force correction on the oval transparent base plate at the middle and back 1/3 of the upper palate on class Ⅲ malocclusion and the changes of facial morphology.Methods From February 2020 to September 2021,36 patients with Class Ⅲ malocclusion were selected and treated in our hospital.They were treated with mandibular extraoral posterior traction,continuous forward force on the oval transparent base plate at the middle and back 1/3 of the upper palate,inter-maxillary traction,and rubber lotus traction to close the gap.The orthodontic effects of the patients and the changes of soft and hard tissues before and after the correction were observed and recorded.Results The values of SNA angle,ANB angle,U1-NA angle,U1-NA distance,U1-FH angle and ULP of the patients after treatment were significantly higher than those before treatment(P<0.05);SNB angle,OP-FH angle,U1-L1 angle,SnLs SiLi angle and Cm Sn Ls angle were smaller than those before treatment,and the difference was statistically significant(P<0.05).Conclusion In patients with Class Ⅲ malocclusion,the continuous forward force on the oval transparent base plate at the middle and back 1/3 of the upper palate,the transparent pad of the upper posterior teeth,and the backward traction of the lower jaw are used to induce the forward development of the upper jaw,even the forward development of the N point of the nasal root point,and the backward contraction of the lower jaw;After the correction of anterior crossbite,remove the pad,intermaxillary traction,and the continuous forward force of the transparent base plate of the upper palate can not only induce the forward development of the dysplastic nasal root and nasal base,but also induce mandibular retrusion.In the case of tooth extraction,the gap can also be closed,which can effectively correct the crossbite,adjust the covering,and improve the facial shape of the patient’s mandibular pro

关 键 词：安氏Ⅲ类错颌 正畸 下颌后牵引 推上颌前向发育 颌间牵引 关闭间隙 压低后牙 软硬组织变化 

分 类 号：R783[医药卫生—口腔医学]