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ＡＮＢ角与Ｗｉｔｓ值均是评价上下颌基骨矢状位置关系的重要方法。作者在对蒙古族正常儿童Ｘ线头影测量研究中发现，平面角随生长发育而减小．平面角的变化严重影响Ｗｉｔｓ值的可靠性。因此在对颌骨纵向生长发育评价及生长发育期患者矫治前后颌骨矢状位置关系的对比分析中，ＡＮＢ角比Ｗｉｔｓ值可靠。
ANB angle and Wits value are important methods to evaluate the sagittal and sagittal position of the maxillary and mandible. The author of Mongolian normal children X-cephalometry study found that the plane angle decreases with the growth and development. Changes in the plane angle seriously affect the reliability of the Wits value. Therefore, in the evaluation of the longitudinal growth and development of the jaw and the comparison of the sagittal position of the jaw before and after orthodontic treatment, the ANB angle is more reliable than the Wits value.