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Post impingement in posterior stabilised total knee arthroplasty
1St Lucas General Hospital, Bruges, Belgium. olivier.verborgt@pandora.be
Acta Orthopaedica Belgica
|April 2, 2004
Summary
Posterior stabilised (PS) knee implants may experience "post impingement" in deep flexion. This issue, linked to specific component placements, can cause wear and affect long-term function.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Materials Science
Background:
- Posterior stabilised (PS) implants are widely used for total knee arthroplasty.
- Concerns exist regarding polyethylene wear debris from the post-cam articulation in PS designs.
Purpose of the Study:
- To report and analyze the phenomenon of tibial post impingement against the patellar component in deep flexion during PS total knee arthroplasty.
Main Methods:
- The study investigated cases of posterior stabilised total knee arthroplasty.
- Data analysis focused on identifying factors associated with tibial post impingement in deep flexion.
Main Results:
- Tibial post impingement was observed in deep flexion.
- Associated factors include a raised joint line, patella infera, anterior tibial component placement, and smaller femoral component size.
Conclusions:
- "Post impingement" in PS total knee arthroplasty may lead to extensor mechanism issues and increased polyethylene wear.
- These factors could negatively impact the long-term functional outcomes of the procedure.