摘要
目的：评价减数下颌第二恒磨牙矫治骨性Ⅲ类错的临床效果。方法：临床选择8例骨性Ⅲ类错患者,年龄12~15岁,ANB角平均-2.63°,拔除下颌第二恒磨牙,采用镍钛螺旋推簧＋Ⅲ类牵引远中移动下牙弓,拍摄X线头影测量片,对治疗前后变化进行统计学分析。结果：治疗后SNA平均增加（2.25±2.43）°,ANB增加（1.75±0.96）°;L1-MP平均减少（4.25±2.66）°,L1-NB角减少（5.12±3.79）°,L1-NB距减少（2±1.31）mm;以上项目治疗前后差异均有统计学意义（P＆lt;0.001~0.05）。结论：减数下颌第二恒磨牙可成功矫治某些特定的骨性Ⅲ类错。
Objective：To evaluate the therapeutic effects of lower second molar extraction in correction of skeletal class Ⅲ malocclusion.Methods： 8 patients with skeletal class Ⅲ malocclusion（12~15 years old,ANB-2.63°） on average） were included in the study.All the subjects were corrected by lower second molars extraction coordinated with nitinol coil spring and class Ⅲ elastics;and cephalometric films were taken before and after the treatment for statistical analysis.Results： After treatment,SNA increased by（2.25±2.43）°on average,ANB increased by（1.75±0.96）°;L1-MP decreased by（4.25±2.66）°,L1-NB angle and distance decreased by（5.12±3.79）°and（2±1.31）mm respectively;All the Results above have statistical significance（P0.001~0.05）.Conclusion：Extraction of lower second molar may successfully correct some specific skeletal class Ⅲ malocclusion.
出处
《泸州医学院学报》
2012年第2期151-153,共3页
Journal of Luzhou Medical College
关键词
骨性Ⅲ类错
拔除下颌第二磨牙
临床效果
Skeletal class Ⅲ malocclusion
Lower second molar extraction
Clinical therapeutic effect
