颅底重叠法Wits值的评价

Evaluation of Wits appraisal with superimposition method

目的 探讨颅底重叠法测量Wits值与常规Wtis值测量法对评价治疗前后颌骨矢状关系改变的可靠性。方法 样本为48例经过正畸治疗的错患者的头颅侧位片,用计算机数字化仪测量法分别测量常规Wits值、颅底重叠法Wits值及ANB角在治疗前后的变化,用SAS软件包对3者间的相关性进行统计分析。结果 重叠法Wits值与ANB角之间的相关性明显高于常规Wits值,相关系数高达0.849,差异具有高度显著性(P<0.001)。结论 重叠法Wits值较常规法Wits值能够更客观地反映治疗前。

Objective To compare the conventional Wits appraisal with superimposed Wits appraisal in evaluation of sagittal jaw relationship change between pre and post orthodontic treatment. Methods The sample consists of 48 case pre and post treatment lateral head films. Computerized digitizing is used to get the cephalometric landmarks and measure conventional Wits value, superimposed Wits value and ANB angle. The correlation analysis among these three measures was done by SAS statistical package. Results The change of ANB angle has higher correlation with the change of superimposed Wits than that of the conventional Wits. The r value is as high as 0.849 ( P <0.001). Conclusion The superimposed Wits appraisal reflects the change of sagittal jaw relationship more objectively than the conventional one.