Retrospective study on effectiveness of Activ L total disc replacement

Abstract Background The effectiveness of lumbar total disc replacement (TDR) with different prostheses for sagittal alignment has been reported previously. However, there are only few reports on Activ L TDR and no specific evidence regarding whether affects the clinical outcomes. Methods Eighty-seven patients who underwent mono- or bi-segmental were studied. films upright anteroposterior lateral spine in neutral, flexion, extension positions obtained before surgery at 1 month 3 years after surgery. radiographic parameters such as lordosis (LL), index level (IL), pelvic incidence (PI), tilt (PT), segmental (SL), sacral slope (SS) measured based radiographs. Clinical outcomes evaluated using Oswestry Disability Index (ODI) visual analog scale (VAS) pre- post-operatively. Results complete data available a 3-year follow-up period. Of these, 66 received single-level TDR, 21 2-level TDR. At month, mean LL was similar to pre-operative then significantly increased 45.1° years. On average, IL tended increase, while SL L–5 from 16.5° pre-operatively 21.0° L1–2, L2–3, L3–4, L5–S1; PI; PT; SS showed obvious difference In contrast, VAS ODI scores significant improvement Conclusions favorable effect alignment, enhancing preserving SS. satisfactory results over not affected by alignment.