Leonard M, Walker G F
J Oral Surg. 1977 Jan;35(1):21-4.
A cephalometric study of the relation of the malar eminence to the A point has been made. It is proposed that the orbital-NA distance is of clinical importance in patients with SNA of less than 79 degrees in whom a Le Fort I osteotomy procedure is contemplated. The measurement of the angle SNO is a significant guide to the malar-maxillary relationship and will assist in complete cephalometric evaluation of these patients.
已对颧骨隆突与A点的关系进行了头影测量研究。对于拟行Le Fort I型截骨术的SNA小于79度的患者，眶-鼻根点距具有临床重要性。SNO角的测量是颧骨与上颌骨关系的重要指标，有助于对这些患者进行全面的头影测量评估。
