TY - JOUR T1 - Commentary on an article by Rick Delamarter, MD, et al.: “Prospective, Randomized, Multicenter Food and Drug Administration Investigational Device Exemption Study of the ProDisc-L Total Disc Replacement Compared with Circumferential Arthrodesis for the Treatment of Two-Level Degenerative Lumbar Disc Disease. Results at Twenty-four Months” AU - Schoenfeld, Andrew J. Y1 - 2011/04/20 N1 - 10.2106/JBJS.J.01847 JO - The Journal of Bone & Joint Surgery SP - e41 1 EP - 2 VL - 93 IS - 8 N2 - For nearly as long as spinal arthrodesis has been used to treat lumbar spine disorders, concerns have been raised regarding the long-term biomechanical and anatomic ramifications of successful fusion, particularly adjacent-segment disc degeneration and loss of lumbar range of motion. In many ways, the specter of adjacent-segment disc degeneration has been most concerning as it can lead to a deterioration in function that was gained following the initial procedure as well as to symptoms that may require further surgery. As a result, new surgical devices and procedures are being developed with the intention of treating lumbar degenerative conditions while maintaining near-normal biomechanical and anatomic parameters. Without question, the total disc replacement is one such "motion-sparing" device that has received substantial attention within the spine surgery community. SN - 0021-9355 M3 - doi: 10.2106/JBJS.J.01847 UR - http://dx.doi.org/10.2106/JBJS.J.01847 ER -