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Total knee arthroplasty using the S-ROM mobile-bearing hinge prosthesis.
R E Jones1, J G Skedros, A J Chan
1Center for Joint Restoration, Dallas, Texas 75235, USA.
The Journal of Arthroplasty
|April 18, 2001
Summary
The S-ROM mobile-bearing hinge total knee prosthesis demonstrated significant improvements in pain, motion, and stability for patients with severe instability and bone loss. Functionality also improved, indicating satisfactory outcomes for complex knee revision surgeries.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
Background:
- Severe knee instability and bone loss present complex challenges in total knee arthroplasty.
- Revision arthroplasty often requires specialized implants to address bone defects and instability.
Purpose of the Study:
- To evaluate the clinical outcomes of the S-ROM mobile-bearing hinge total knee prosthesis.
- To assess the efficacy of this prosthesis in patients with severe instability and bone loss, including revision cases.
Main Methods:
- Retrospective study of 15 patients (16 prostheses) with a minimum 2-year follow-up.
- Analysis of Knee Society scores for pain, motion, stability, and function.
- Radiographic assessment for loosening and bone apposition.
Main Results:
- Significant improvement in Knee Society scores for pain, motion, and stability (P <.0001).
- Functional scores showed improvement, particularly after excluding a patellar tendon rupture case (P <.01).
- No evidence of prosthesis loosening; complete bone apposition observed in most cases.
Conclusions:
- The S-ROM mobile-bearing hinge prosthesis yields satisfactory results for severe knee instability and bone loss.
- This implant is a viable option for complex primary and revision total knee arthroplasties requiring enhanced stability.