考虑到活动技术的概念，来自于II I级预后研究提示植入节段更高的活动度与更好的功能结果相关。
Considering motion technology concept issues, data from a level III prognostic study suggest that higher ROM of the implanted segment may be related with better outcomes.
背景资料概述：已经证实，TDR能保存活动度并可能能防止相邻节段的异常负荷。
Summary of Background Data. TDR has been shown to preserve motion and possibly prevent abnormal loading at the adjacent level.
这些问题包括病人淘汰、植入手术的精确性以及保留活动度后改变脊柱节段性退变自然病程的存在证据。
These questions included patient selection issues, surgical accuracy of implantation, and existing evidence that motion preservation alters the natural history of spinal segmental degeneration.
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