摘要
Abstract
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.关键词
多排螺旋CT/X线片/替牙期/骨性反/快速扩弓器联合前方牵引Key words
Multi-slice spiral CT/X-ray/Dentition/Skeletal crossbite/Rapid palatal expansion technique with protraction
