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Updated: Jun 28, 2026
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Multilevel Oblique Lumbar Interbody Fusion in Degenerative Lumbar Disc Disease with Instability
Published on: July 25, 2025
Design concepts in lumbar total disc arthroplasty
Fabio Galbusera1, Chiara M Bellini, Thomas Zweig
1IRCCS Istituto Ortopedico Galeazzi, via Riccardo Galeazzi, 4, 20161, Milan, Italy. fabio.galbusera@polimi.it
Summary
Total disc arthroplasty (TDA) aims to restore spinal biomechanics. While both semi-constrained and unconstrained lumbar disc prostheses show promise, further long-term clinical studies are needed to confirm their efficacy and safety.
Area of Science:
- Biomedical Engineering
- Orthopedic Surgery
- Spinal Biomechanics
Background:
- Lumbar disc prostheses are widely accepted for treating spinal conditions.
- Total disc arthroplasty (TDA) involves replacing damaged intervertebral discs with artificial devices.
- Understanding the biomechanics of TDA is crucial for evaluating prosthesis performance.
Purpose of the Study:
- To review literature on the biomechanics of lumbar TDA.
- To evaluate relationships between TDA goals and prosthesis properties (geometrical, mechanical, material).
- To analyze theoretical and experimental studies on single-level TDA.
Main Methods:
- Literature search of PUBMED (Feb 2007, revised Jan 2008).
- Analysis of theoretical and experimental studies on single-level TDA.
- Focus on biomechanical outcomes like IAR location, ROM, lordosis, and facet joint loading.
Main Results:
- Both semi-constrained and unconstrained prostheses may restore physiological IAR locations and ROM.
- Reported ROM changes (increase/decrease) were not consistently linked to clinical outcomes.
- Segmental lordosis alterations and increased facet joint loading were common after TDA.
- Semi-constrained devices might offer load-sharing benefits but face wear concerns.
Conclusions:
- Lumbar TDA shows potential for restoring spinal biomechanics.
- Further research is needed to correlate biomechanical findings with long-term clinical outcomes.
- Future developments should focus on biomechanical integration, including compression across the motion segment.
