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Cervical Plate Ratchet Pedicle Screws

机译:颈椎棘轮椎弓根螺钉

摘要

A dynamic cervical plate has a ratchet and pawl mechanism that allows the cervical plate to post operatively shorten the length of the plate and maintain compression between adjacent vertebrae. The plate has an elongated shaft with teeth on one surface and a groove along each longitudinal edge. A lateral plate is attached on one end of the shaft. The plate has screw holes for connecting with the head of a spinal screw. Another lateral plate is slidably engaged in the longitudinal grooves along the shaft and has a spring clip acting as a pawl with the teeth on the shaft. The sliding bar has screw holes on each side of the shaft. The clip is configured to span the screw holes to automatically engage and prevent screws from backing out of the holes.
机译:动态颈椎板具有棘轮和棘爪机构,该棘爪和棘爪机构使颈椎板可操作地缩短板的长度并保持相邻椎骨之间的压缩。所述板具有在一个表面上具有齿的细长轴以及沿着每个纵向边缘的凹槽。在轴的一端上附接有侧板。该板具有用于与脊椎螺钉的头部连接的螺钉孔。另一个侧板沿轴可滑动地接合在纵向凹槽中,并具有一个弹簧夹,该弹簧夹用作棘爪,且齿在轴上。滑杆在轴的每一侧都有螺孔。夹子被配置为跨越螺孔以自动接合并防止螺钉从孔中退出。

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