Spine
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Randomized Controlled Trial
Five-year Follow-up of a Prospective, Randomized Trial Comparing Two Lumbar Total Disc Replacements.
This was a prospective, randomized, controlled, multicenter study. ⋯ This prospective, randomized study comparing two TDRs found no significant differences in outcomes during 5-year follow-up. Both provided statistically significant improvements by 6 weeks that were maintained. This results support other studies. Serum ion levels in TDR patients were well below the recommended threshold levels to merit monitoring.