ADR Design Intersegmental Biomechanics Lumbar Spine: 2007 Otho.Research Soc. Pre-Meet

[Slackwater]

Orthopaedic Research Society: Link PDF
© 2007 Orthopaedic Research Society

Implications of Artificial Disc Design on the Intersegmental Biomechanics of the Lumbar Spine

Chen, W M 1; Ahn, Y H 1; Lee, K Y 2; Park, C K 3; Lee, S J 1, 4
1 Department of Biomedical Engineering, Inje University, Gimhae, Korea
2 Department of Mechanical Engineering, Sejong University, Seoul, Korea
3 Department of Neurosurgery, Kangnam St.Mary's Hospital, the Catholic University of Korea, Seoul, Korea;
4 Paik Institute for Clinical Research, Inje University, Busan, Korea

CONCLUSION:
Under current loading control, both semi-constrained (Prodisc-L) and unconstrained (Charité III) disc prostheses exhibited larger ROM in the sagittal plane than intact spine, although the ROM remained within the physiological motion range found in the literature [2]. Charité III showed more mobility than Prodisc-L, especially for extension motion.

Moreover, the “unconstrained” feature of the Charité III may also be blamed for the more stressed facet joint at the implanted level during flexion/extension motion due to its lacking of supporting intervertebral shear, which may increase the risk for facet joint degeneration.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Please read the full pdf document; it's linked above. The conclusion is quoted (partially bolded) in this posting.


Slackwater