posterior arch meaning in English

后弓

Ct measurement of the path of screw fixation in atlas via posterior arch and lateral mass
测量在椎弓根螺钉固定中的意义
The research of directions of screw trajectory in atlas via posterior arch and lateral mass and its clinical significance
后路经寰枢椎侧块关节螺钉固定融合治疗类风湿性寰枢椎不稳
Excessive mesial - axial inclination of the mandibular second molar or inadequate posterior arch length cause the mandibular second molar to become impacted against the distal contour of the first permanent molar
摘要下颚牙弓空间不足或第二大臼齿本身过度的近心轴向倾斜，常造成第二大臼齿前倾和阻生。