Why the study?
Does the TOPS implant restore range of motion compared to intact specimens in lumbar spines?
Does the TOPS implant restore range of motion compared to intact specimens in lumbar spines?
The TOPS implant effectively restores near-normal biomechanical range of motion in lumbar spine specimens.
Supports preclinical validation of TOPS; leaves open clinical translation to lumbar surgery.
The TOPS implant almost ideally restored the ROM in lateral bending and axial rotation compared to that of the intact specimen. In the sagittal plane, 85% of the intact ROM could be obtained. The ROM in axial rotation as a function of flexion and extension angle also mimics the biomechanical behavior of the posterior complex of a lumbar spine. This relationship between ROM and posture emphasizes the importance of a proper implantation.
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Wilke et al. (2006) studied this question.
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