支架式上颌前牵引矫治儿童骨性Ⅲ类错前后前后软硬组织变化的临床分析研究  

Orphopedic treatment of skeletal class Ⅲ malocclusion with fixed maxillary protraction therapy

作　　者：毛新霞[1] 邹敏[2] 邢龙 徐华[1] 王惠[1] 

机构地区：[1]张掖市人民医院口腔科,甘肃张掖734000 [2]西安交通大学口腔医院正畸科 [3]临夏州人民医院口腔科

出　　处：《中国美容医学》2010年第10期1531-1534,共4页Chinese Journal of Aesthetic Medicine

摘　　要：目的:探讨支架式上颌前牵引矫治器对儿童骨性Ⅲ类错的矫治效果。方法:采用改良支架式前牵引矫治器对26例儿童骨性Ⅲ类错患者(7～10岁)进行前牵引治疗。分别在治疗开始(T0)和结束(T1)时拍摄头颅定位侧位片,进行定点测量分析。结果:①硬组织变化:ANB角增加5.26°(P<0.001),Wit's值增加5.26mm(P<0.01),Ptm-A增加2.28mm(P<0.05),Yaxis增加1.25°(P<0.001);SNB角减小0.67°(P>0.05),Go-Me、Co-Gn分别增加0.72mm和1.56mm(P>0.05),SN-PP减小1.24°,PP-MP增加4.2°(P<0.05),颌凸角增加7.07°(P<0.001),下面高、下面高/全面高分别增加2.47(P<0.05)、0.42(P>0.05)。U1-NA角增加4.57°(P<0.001),L1-NB角减小3.21(P<0.05),Ms6-PP距增加0.45mm(P>0.05)。2)软组织变化:面型角增大5.37°(P<0.01),颏唇角减小2.70°(P<0.05),上唇-E线距增大1.51mm(P<0.01),下唇-E线距减小1.25mm(P<0.05)。结论:支架式上颌前牵引矫治器矫治儿童骨性Ⅲ类错,可产生显著治疗效果:上颌骨前移,上下颌骨的矢状关系改善,凹陷型的畸形容貌显著改善,但高角患者慎用。Objective Application of fixed frame appliance in maxillary protraction therapy is used to achieve better treatment effects of skeletal Class Ⅲ malocclusion. Methods 26 children of 7-10 year-old with skeletal class Ⅲ malocclusion were treated with fixed maxillary protraction therapy in this study. Before and after the treatment cephalometric radiographs were taken and analyzed. Results After maxillary protraction, the anterior crossbite had been corrected and obvious changes of profile can be observed, the maxilla moved foreward, the length increased but followed with PP-SN plane rotates anticlockwise, the mandible moved backward and downward,the ANS-Me,ANS-Me/ N-Me increased.For the change of teeth,the upper incisors incline labially and the lower incisors incline lingually with the jaw.Changes of profile can be achieved with FCA,LL＇-Sb-Pog＇,H angle increased. The position of upper lip moved forward and protrusion increased, corresponding, the displacement of the lower lip moved backward, conclusions The method of fixed maxillary protraction therapy is effective treatment for the patients of Class III malocclusion with maxillary deficiency.In sagittal direction, the maxilla move foreword, the improvement of the relationship between the upper and lower jaw can be observed.Overjet,overbite and molar relationship had significant changes,also,the soft facial profile improved obviously.But we should be cautioned in class Ⅲ malocclusion with hyperdivergen.

关 键 词：上颌前牵引 固定支架 安氏Ⅲ类错【牙合】 

分 类 号：R783.5[医药卫生—口腔医学]