摆式矫治器结合直丝弓矫治器治疗Ⅱ类错的疗效分析  

Posttreatment evaluation of pendulum appliance followed by fixed orthodontic treatment

作　　者：潘爽[1] 王春玲[1] 刘东旭[1] 韩敏[1] 董仁萍[1] 

机构地区：[1]山东大学口腔医院正畸科,山东省口腔生物医学重点实验室,济南250012

出　　处：《口腔医学》2010年第2期93-95,共3页Stomatology

基　　金：山东省自然科学基金资助项目(Y2005C22)

摘　　要：目的分析安氏Ⅱ类错患者经摆式矫治器结合直丝弓矫治器治疗后的牙颌面结构变化,探讨此方法建立正常咬合关系的机制。方法选择牙源性安氏Ⅱ类错患者24例,在治疗前(T1期)、推磨牙向远中后(T2期)、直丝弓矫治结束后(T3期),拍摄头颅定位侧位片。采用SPSS12.0软件包进行配对t检验。结果①T1期-T2期,上颌第一二磨牙均远中移动,但伴随着上颌切牙唇倾、第一前磨牙近中移动并倾斜、第一磨牙远中倾斜及下颌平面顺时针旋转等副作用。②T1期-T3期,下颌综合长度、前下面高和升支高度增加显著(P<0.01)。上颌第一前磨牙、第一磨牙的矢状向位置无显著性差异,切牙唇倾2.9°(P<0.05)。即使增强了支抗控制,固定矫治阶段上颌第一磨牙近中移动3.0mm(P<0.01)。结论摆式矫治器可以有效的远中移动上颌磨牙,但是Ⅰ类磨牙关系的建立是颌骨差异性生长和牙齿移动的综合结果。Objective To analyze molar distalization with the dendulum appliance,its effect on the anchorage teeth, and the outcome at the completion of orthodontic treatment. Methods Lateral cephalograms of 24 adolescents （ 13 girls, 11 boys）, taken after pretreatment, after distalization, and after fixed orthodontic treatment, were evaluated. The mean age of the subjects at the time of the pretreatment radiograph was 11.6 years. Results The pendulum appliance distalized the maxillary molars, but there was significant loss of anchorage. After fixed orthodontic treatment, the maxillary first premolars and first molars were returned to their pretreatment anteroposterior positions. Thus,at postdistalization, there was 3.0 mm of protrusion of the maxillary first molars, despite the anchorage reinforcement. Conclusions The dendulum appliance followed by fixed orthodontic treatment corrected the Class Ⅱ sagittal relationship,especially due to the dentoalveolar changes secondary to the spontaneous mandibular growth in the anterior direction during fixed appliance treatment.

关 键 词：摆式矫治器 磨牙远中移动 Ⅱ类错(牙合) 

分 类 号：R783.5[医药卫生—口腔医学]