多排螺旋CT在快速扩弓器联合前方牵引矫治替牙期骨性反的应用效果

摘要

目的：探讨多排螺旋CT在快速扩弓器联合前方牵引矫治替牙期骨性反的应用效果。方法：36例儿童替牙期骨性安氏Ⅲ类错患儿均接受快速扩弓器联合前方牵引矫治治疗，均同时接受拍摄X线片及MSCT片，测量上下颌骨各项参数。结果：X线片与MSCT的SNA角、SNB角、ANB角、U1-NA角、颌凸角、U1-NA距、ANS-Ptm距、L1-MP角及U1-SN角比较，差异均有统计学意义（P<0.05）。X线片各角的CV值均高于MSCT，差异均有统计学意义（P<0.05）。结论：多排螺旋CT在替牙期骨性反儿童快速扩弓器联合前方牵引矫治中上颌骨相关指标测量的精确度更高，离散程度小，重复测量结果好，通过较准确的测量数据分析来探讨快速扩弓器联合前方牵引矫治替牙期骨性反诱导上颌骨生长量的变化，对该技术作出更为准确的疗效评价并指导临床治疗等方面具有较高的应用价值。%Objective:To investigate the application effect of multi-slice spiral CT in orthodontic treatment of skeletal crossbite during mixed dentition by rapid maxillary expansion device combined with anterior traction. Method:36 children with mixed dentition skeletal class III malocclusion were treated with rapid palatal expansion and protraction treatment,were also being filmed X-ray and MSCT sheet,measuring the parameters of the upper and lower jaw.Result:X-ray and MSCT SNA angle,SNB angle,ANB angle,U1-NA angle,angle of convexity, U1-NA distance,ANS-Ptm distance,L1-MP angle and U1-SN angle of comparison,the differences were statistically significant(P<0.05).X-ray of the CV were higher than MSCT,the differences were statistically significant(P<0.05).Conclusion:The accuracy of multi slice spiral CT measurement of related indexes in skeletal malocclusion in mixed dentition children rapid palatal expansion combined with maxillary protraction in the higher dispersion degree of small, repeated measurement results, through the analysis of measurement data is more accurate to evaluate the rapid palatal expansion with anterior traction of mixed dentition skeletal crossbite occlusion induced changes in maxillary growth, the technology to make more accurate evaluation of curative effect and has high application value and guiding the clinical treatment.