摘要
目的研究磁力扩弓(MPE)后上颌牙列三维方向的位置变化。方法选取15例经MPE的患者,应用螺旋CT获得治疗前后的三维数据模型,测量上颌牙列各标志点的三维位置和角度的改变,并采用配对符号秩检验对比分析各项数据。结果MPE治疗前后上颌牙列位置在矢状向、垂直向和水平向上均发生了改变。第一磨牙和第一前磨牙发生了颊倾和整体移动;上颌最大扩宽位置是在第一前磨牙区;上颌中切牙发生了向下和向前的移动。结论螺旋CT能够详细测量上颌牙列在MPE前后的位置变化,为进一步研究MPE的机制和特点提供了依据。
Objective To investigate upper arch changes after magnetic palatal expansion （MPE） in three-dimen- sional direction. Methods 15 patients treated with MPE were included in the study. Spiral CT images were used to evaluate three-dimensional changes of upper arch, and the changes of upper arch points were measured. The results were analyzed based on pairs signed rank test method. Results Upper arch and teeth move in three-di- mensional changed after MPE. Upper first molars and first premolars had buccal inclination and bodily movement. The maximum expansion was observed between upper first premolars, and upper central incisors moved downward and forward. Conclusion Spiral CT is useful in the three-dimensional evaluation of maxilla after MPE and pro- vided the first evidence to study mechanism of MPE.
出处
《国际口腔医学杂志》
CAS
2012年第4期435-438,共4页
International Journal of Stomatology
基金
国家自然科学基金资助项目(81070807)
南京市局重点课题基金资助项目(ZKX08018)
南京市医学科技发展基金资助项目(YKK11038)
关键词
磁力扩弓
三维测量
螺旋CT
magnetic palatal expansion
three-dimensional measurement
spiral CT
