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Published on: July 5, 2011
Review article: Patellar instability after total knee arthroplasty.
Efstathios K Motsis1, Nikolaos Paschos, Emilios E Pakos
1Department of Orthopaedic Surgery, University Hospital of Ioannina, Ioannina, Greece.
Journal of Orthopaedic Surgery (Hong Kong)
|January 13, 2010
Summary
Patellar instability after total knee arthroplasty (TKA) is a complication impacting function and potentially requiring revision. Diagnosis involves imaging, with treatments ranging from component revision to soft-tissue realignment.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Rehabilitation Medicine
Background:
- Patellar instability is a significant complication following total knee arthroplasty (TKA).
- It can lead to reduced functional outcomes and necessitate revision surgery.
- Potential causes include surgical technique, component malpositioning, and extensor mechanism imbalance.
Purpose of the Study:
- To review the etiology, diagnosis, and treatment of patellar instability after TKA.
- To provide an overview of current management strategies for this complication.
Main Methods:
- Review of literature on patellar instability post-TKA.
- Analysis of diagnostic methods including radiological evaluation.
- Summary of surgical and non-surgical treatment options.
Main Results:
- Anterior knee pain during activity suggests patellar instability post-TKA.
- Radiological assessment of patellar position, alignment, and fixation is crucial for diagnosis.
- Treatment depends on the underlying cause, involving component revision or soft-tissue procedures.
Conclusions:
- Patellar instability is a serious complication of TKA with diverse etiologies.
- Accurate diagnosis through imaging guides appropriate treatment selection.
- Management strategies aim to restore stability and improve functional outcomes.
