the distance between fossa canina and canalis infraobitalis was(.±8.9)mm,and the angle was(. ±7.8)°?尖牙窝距眶下管距离的平均值为 ( ± 8 9)mm ; 尖牙窝与眶下管各点连线和过尖牙窝垂直轴的夹角平均值为 ( ± 8)°。