方法测量11例骨性下颌前突伴偏斜患者治疗前模型，将上颌腭中缝作为中线标准，测量牙弓两侧同名牙接触点到腭中缝的距离，观测牙弓的对称性。

Methods Measurement of 11 dental models was performed, midline of palate was defined as central line, the distance of every contact point to the midline was measured in each side.

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目的通过CT法及裸骨投照测量法(以下简称“裸骨法”)测量股骨扭转角的比较，探讨CT测量扭转角的可靠性。

Objective Compared with ct scan method and "bare-bone method" of measuring femoral torsion Angle, to study the reliability of measuring torsion Angle by means of ct method.

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目的减少下颌骨形态测量的偶然性误差，提高测量精度。

Objective To minimize the chance error and increase the accuracy of mandible bone measurement.

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