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Intervertebral disc prosthesis. Results and prospects for the year 2000
J P Lemaire1, W Skalli, F Lavaste
1Centre d'Etude et de Chirurgie du Rachis, Point Médical, Dijon, France.
Clinical Orthopaedics and Related Research
|April 1, 1997
Summary
The SB Charité artificial disc replacement shows excellent clinical results, with 79% of patients achieving great outcomes and 87% returning to work. Key factors for success include restored spinal lordosis and mobility, while facet joint issues can lead to failure.
Area of Science:
- Spine surgery
- Biomechanical engineering
- Orthopedic research
Background:
- The SB Charité kinematic disc prosthesis represents a significant advancement in spinal disc replacement technology.
- Understanding the biomechanics of disc prostheses is crucial for improving patient outcomes and device longevity.
Purpose of the Study:
- To evaluate the clinical and radiological outcomes of the SB Charité disc prosthesis.
- To identify factors contributing to the success and failure of this artificial disc model.
- To explore the application of numerical modeling in analyzing facet joint biomechanics.
Main Methods:
- Clinical assessment of 105 patients with a mean follow-up of 51 months.
- Radiological evaluation focusing on spinal lordosis and segmental mobility.
- Two- and three-dimensional numerical modeling to analyze facet joint loading.
Main Results:
- 79% of patients reported excellent clinical results.
- 87% of patients returned to work.
- Radiological success correlated with restored lordosis and segmental mobility.
- Posterior facet arthritis, osteoporosis, and deformities were identified as failure factors.
Conclusions:
- The SB Charité prosthesis offers a favorable outcome for disc replacement surgery.
- Maintaining spinal biomechanics, including lordosis and mobility, is vital for successful prosthesis function.
- Facet joint loading analysis through numerical modeling can guide technological improvements in disc prostheses.