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[Intermediate results of kinematic knee prosthesis]
M Krismer1, B Stöckl, T Achammer
1Orthopädische Universitätsklinik, Innsbruck.
Der Orthopade
|June 1, 1991
Summary
This study evaluated kinematic total knee prostheses, finding correlations between component alignment and clinical outcomes. Poor alignment was linked to revision surgery needs and radiolucencies, impacting knee function.
Area of Science:
- Orthopaedic surgery
- Biomedical engineering
- Radiology
Background:
- Kinematic total knee prostheses are designed to mimic natural knee motion.
- Assessing the long-term performance and potential complications of these prostheses is crucial for patient outcomes.
Purpose of the Study:
- To evaluate the clinical and functional outcomes of kinematic total knee prostheses.
- To identify radiographic predictors of complications and the need for revision surgery.
Main Methods:
- Retrospective analysis of 88 kinematic total knee prostheses.
- Clinical and functional assessment using the Knee Society score.
- Radiographic evaluation under fluoroscopic control.
Main Results:
- A slight mean varus angle of 2.1 degrees was observed.
- Flexion contracture correlated with femoral component inclination.
- Tibial and patella component radiolucencies were associated with specific alignment parameters (reduced tibial angle and lateral subluxation, respectively).
- 3 cases required revision surgery.
Conclusions:
- Component alignment in kinematic total knee prostheses significantly influences clinical outcomes and radiographic findings.
- Specific malalignments, such as femoral inclination and tibial angle deviations, are associated with increased risks of flexion contracture and radiolucencies.
- Early identification of alignment issues through radiographic assessment may help predict the need for revision surgery.