Functional and Radiological Outcomes of Patella Retaining Total Knee Arthroplasty: Minimun 5-Year Follow-up Results / 대한정형외과학회잡지

ABSTRACT

PURPOSE: Conflicting results have been reported for patellar resurfacing in total knee arthroplasty. We reviewed the clinical and radiological results of patella retaining total knee arthroplasties retrospectively. MATERIALS AND METHODS: Patella retaining total knee arthroplasty using a press-fit condylar (PFC) model by the hybrid technique was reviewed retrospectively in 27 knees (22 patients). Clinical evaluation was done according to HSS knee and patella scores. Radiographic assessment was made by measuring the patellofemoral joint space (mild, moderate, and severe loss), patellar sclerosis, patellar tilt, and patellar subluxation. RESULTS: The mean HSS knee score improved from 58 to 87 and the patellar score was found to be good or excellent in 85% (23/27) of cases. Patellar sclerosis was found in 10 cases (9 lateral and 1 medial) and patellar tilting was found in 4 cases (15%). Correlation between the radiographic findings and the clinical scores was statistically indifferent (p>0.05). CONCLUSION: Patella retaining total knee arthroplasty may reduce patellofemoral complications but long term radiographic and clinical follow-up including patellar sclerosis, patellar tilting, and patellar subluxation is recommended.