Stress Fracture of the Lateral Femoral Condyle afterTotal Knee Arthroplasty

Document Type: CASE REPORT

Authors

1 Department of Orthopedic Surgery, Imam Hossein Hospital, Shahid Beheshti University of Medical Sciences (SBUMS), Tehran, Iran

2 Department of Orthopedic Surgery, Shafa Orthopedic Hospital, Iran University of Medical Sciences (IUMS), Tehran, Iran

Abstract

Background: This is to assess one of the rare complications after total knee replacement and to assess risk factors of failure.
Methods: 11 patients with varus knee and an average age of 67 years underwent TKA between 2005 and 2013. All patients returned with a sudden sharp knee pain, disability to walk and significant decrease in ROM about 4 to 8 weeks after surgery. Radiographic examination revealed a lateral femoral condylar stress fracture.
Results: After analyzing the images, we found common characteristics among all patients, which might be attributable to the later fracture including varus deformity>25, femoral component lateralization, and valgus correction.
Conclusion: Surgeons should be aware of the risk factors to consider before, during, and after surgery.

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