Objective to explore the affect on the cervical stability after 1 ~ 3 cervical discectomy and the effect of bone grafting and internal fixation on the recovery of cervical stability.

目的：探讨摘除1 ~ 3个颈椎椎间盘对颈椎稳定性的影响，以及植骨及内固定后对恢复颈椎稳定性的作用。

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Then the chain to reliable fixation, try not to long in the chain on the upside down weight, easy the chain stretched, will affect the use of the role.

然后是倒链要固定可靠，尽量不要长期的在倒链上倒挂重物，很简单把倒链拉长，就会影响运用的作用。

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