摘要
目的:评价Twin-block功能矫治器配合口外弓及颌间牵引矫治安氏ⅡⅠ类错牙合的疗效。方法:17例骨性ⅡⅠ类错牙合的生长发育期患者,应用Twin-block功能矫治器配合口外弓及颌间牵引治疗,进行咬合重建。治疗前后拍摄头颅侧位定位片,进行头影测量及统计学分析,治疗前后比较采用配对t检验。结果:经联合治疗,17例患者均获得满意效果。第一恒磨牙均达到中性或过矫正关系,前牙覆牙合、覆盖基本达到正常,侧貌面型均有明显改善。上颌骨生长受到抑制,ss/refpl减小,P<0.05;S-N-ss角(即SNA)减小,P<0.01。下颌骨生长获得促进,pg/refpl、co/refpl+pg/refpl、S-N-sm角(即SNB)均增加,有高度显著性差异,P<0.001。s-N-sm角(即ANB)、颌凸角差值有显著改变(P<0.001)。下颌平面角(FMA)的变化无统计学意义,P>0.05。结论:Twin-block功能矫治器配合口外弓及颌间牵引,能有效抑制上颌生长而促使下颌向前生长,使上、下颌骨的矢状不调得到最大程度的矫正,患者侧貌得到明显改善。
PURPOSE： The aim of this study was to evaluate the clinical value of the Twin-block appliance combined with face bow and intermaxillary elastic on Class Ⅱ division Ⅰ malocclusion in 17 cases. METHODS： 17 cases with skeletal Class Ⅱ^Ⅰ malocclusion were included, all cases were treated with Twin-block appliance combined with face bow and intermaxillary elastic. The methods of bite construction, fabrication of the application were introduced. Lateral eephalometric films were taken before and after treatment. Cephalometrie analysis was conducted to evaluate the treatment effects. Student＇s t test was used to determine the effect on jaw growth before and after treatment. RESULTS： The treatment resulted in good outcomes： the neutral or mesial relations of the permanent first molars were reached, the deep overjet was reduced. The S-N-ss angle and the length of maxilla （ss/ref pl） were reduced （P〈0.05, P〈0.01）. The pg/ref pl, co/ref pl＋pg/ref pl and the S-N-sm angle had a significant increase （P〈0.001）. The convexity angle and S-N-sm angle had a significant change（P〈0.001 ）.The FMA angle had no change （P〉0.05）. CONCLUSION： The Twln-block appliance combined with face bow and interulaxillary elastic was very effective on improving mandible growth and inhibiting maxilla growth,the sagital relationship between the upper and lower jaws was more compatible, the profile was improved.
出处
《上海口腔医学》
CAS
CSCD
2005年第4期365-369,共5页
Shanghai Journal of Stomatology
关键词
功能矫治器
安氏Ⅱ类Ⅰ分类错he
咬合重建
Functional appliance
Class Ⅱ division Ⅰ malocclusion
Bite construction
