Tooth coronal and tooth root boundary show one arc curve, call tooth neck, renown neck predestined relationship or neck line.
牙冠与牙根交界处呈一弧形曲线，称为牙颈，又名颈缘或颈线。
Radiographic examination included Cobb Angle, rotation Angle of apical vertebrae, and translation of the C7 vertebra from the center sacral line on the coronal plane.
线检查包括Cobb角，椎体顶点的旋转角和C7椎体在冠状面从骶正中线的平移。
Generally, the anterior line of the coronal sulcus was indistinct, whereas the posterior line was clear and easy to be identified.
冠状沟前缘多较模糊，冠状沟后缘一般较清晰、容易识别。
Results Insertion site is better at the exterior aspect of the horigontal line of intervertebral facet joints in coronal, while in oblique and sagittal plane, 1-3mm furthor outward.
结果骶1进钉点在冠状位小关节上为小关节面下缘水平线与小关节突外缘交点；
Results Insertion site is better at the exterior aspect of the horigontal line of intervertebral facet joints in coronal, while in oblique and sagittal plane, 1-3mm furthor outward.
结果骶1进钉点在冠状位小关节上为小关节面下缘水平线与小关节突外缘交点；
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