三种X线头影测量分析方法临床应用的比较研究

A Comparison of Three Cephalometric Analysis on the Evaluation of Orthodontic Treatment

目的分析不同X线头影分析方法在正畸疗效分析中的作用。方法采用14例经Herbst矫正器治疗的II类错牙合病例治疗前后的X线头影侧位片,用Bj觟rk、Ricketts和Pancherz3种分析方法分别对所有资料进行描绘分析,使用同一参考系统,定量评价矢状面上发生的牙性和骨性变化。结果3种分析方法在统计学上都是可靠的;在评价矢状方向骨性和牙性变化上,3种方法间无显著差异;可靠性指数显示,3种分析方法均不适合于个体分析,只有Pancherz方法对群体分析有效。结论三种头影分析方法各有特点,Pancherz方法相对比较直观有效,且能进行定量分析。

Objective To analyze the reliability of different cephalometric superimposition methods for evaluation of orthodontic treatment. Methods The material consisted of fourteen pairs of cephalograms obtained before and after Herbst treatment. Each pair of the cephalograms were traced, superimposed by means of the three different superimposition methods three times each. A reference grid was used to quantitatively evaluate the sagittal dental and skeletal changes. Results (1) There was no statistically significant difference between the repeated measurements in the three methods respectively, i.e. all the three methods were reliable. (2) There was no significant difference among the three superimposition methods to evaluate the sagittal skeletal and dental changes. (3) Comparing the coefficient of reliability, none of the three methods was suitable for the individual assessment, and Pancherz’ method only was acceptable for assessment of patients in groups. Conclusion The three methods have their own characteristic. The Pancherz method is comparatively direct and effective on quantitative evaluation of orthodontic treatment