Effect of Artificial Disc Position on Spine Biomechanics in the Cervical Spine: A Finite Element Study
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چکیده
INTRODUCTION Total disc replacement(TDR) has been suggested for surgical method to treat degenerative disc disease of the cervical spine because it decompresses nerves and preserves motion segments. The short-term outcomes of the TDR of cervical spine has been well reported to treat degenerative disc diseases as a motion preservation technique in spite of some clinical controversies such as implant wear, excessive motion and facet arthrosis at the surgical level [1, 2]. Rohlmann et al. reported that the position of the prosthesis the position and height of the artificial discs strongly affect on intersegmental rotation and selection of optimal position of implants is very important to achieve successful results in TDR surgery [3]. However, little papers have discussed influence of TDR position on spine biomechanics in the cervical spine. In this study, we compared the biomechanical characteristics of fixedand mobile-core artificial discs by finite element analysis to understand how different implant design concepts affect the biomechanics of the spinal segment after TDR. We also investigated how the position of two types of artificial discs affects on the intersegmental motion of the cervical spine using finite element analysis.
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