The study included data from 136 patients treated at a single site. The researchers found:
1. Reoperation rate for TDR was 8.3 percent, compared with ACF, which was 21.2 percent.
2. Reoperation for adjacent segment degeneration in TDR was significantly less than ACF, at 4.8 percent compared to 13.5 percent.
3. Four patients in the ACF group underwent reoperation for pseudoarthrosis.
4. Reoperations for TDR group occurred significantly later than the ACF group.
5. Patients in the TDR group had significantly longer survival period before undergoing reoperation under the Kaplan-Meier survival analysis.
Authors of the study include Scott L. Blumenthal, MD, Richard D. Guyer, MD, Jack E. Zigler, MD, and Donna D. Ohmeiss, Dr. Med., of Texas Back Institute in Plano.
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