a sock » 袜子 anterior screw » 前螺钉 Jane put forward the proposal that the program be postponed until Mr.
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前灯调节螺钉 head lamp adjusting screw
点火提前角调整螺钉 timing advance adjustment screw
前路齿状突螺钉内固定 anterior odontoid screw fixation
背景：椎弓根螺钉贯穿脊柱前中后三柱，具有三维矫正作用，已成为标准的脊椎后路内固定方法。
BACKGROUND: Pedicle screw which passes through the three columns and has three-dimensional correction function, which has quickly become the standard posterior spinal internal fixation.
目的：探讨髋臼在其前、后柱上的投影和螺钉放置的安全范围。
Objective: to investigate the X-ray projection of acetabulum on its anterior and posterior column and to develop a safe area for screw placement.
固定方法有：前环骨折采用钢板固定；后环骨折分离采用骶骨棒，四孔方形钢板，松质骨螺钉固定。
The methods include posterior ring internal fixation by using sacral bars, four-hole square plates or cancellous screws with anterior ring fixed by plates.
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