在研究100例完整成年脊柱骨骼标本中,我们发现在寰椎侧块内侧面的前下方有一结节且大部分光滑有关节面,而在对应的齿突中部的后外侧有浅凹或平面形关节面,此关节面与齿突前关节面分界清楚而与后关节面相延续。当模拟做寰枢(齿)旋转运动时,结节与齿突可相互接触,本文称之为寰齿 In a study of 100 intact adult spine skeletal specimens, we found that there is a nodule on the anterior and inferior side of the medial side of the atlas and most of the smooth nodules, whereas there is a dimple or plane behind the medial part of the corresponding odontoid process Articular surface, the articular surface and the denticulation of the anterior articular surface of a clear boundary with the continuation of the articular surface. When simulating atlantoaxial (tooth) rotational movement, the nodules and odontoid may be in contact with each other, referred to herein as atlanto