Fatigue fracture of the femur after navigated total knee replacement.

Navigated total knee arthroplasty in a patient with severe diaphyseal deformities.

A 65-year-old patient presented with severe osteoarthritis of the knee, 47 years after a severe polytrauma in which he had presented diaphyseal fractures of the left femur and tibia. These fractures had been treated conservatively and had healed with major deformities. He underwent total knee arthroplasty with navigation assistance. This allowed for optimal component positioning and restoration...

Aging Effect on Femoral Stress Fracture Risk after Computer-navigated Total Knee Arthroplasty

INTRODUCTION Recent clinical studies have shown that computer navigation for total knee arthroplasty (TKA) provides improved component alignment accuracy, and can help to avoid femoral malrotation and errors in axial alignment [1]. However, femoral stress fracture after computernavigated TKA has been reported due to the pin hole [2] and we hypothesized that osteoporosis would be one of the key ...

OPEN PATELLA PERIPROSTHETIC FRACTURE AFTER TOTAL KNEE REPLACEMENT: A CASE REPORT AND REVIEW OF LITERATURES

Risk of Anterior Femoral Notching in Navigated Total Knee Arthroplasty

BACKGROUND We retrospectively investigated the prevalence of femoral anterior notching and risk factors after total knee arthroplasty (TKA) using an image-free navigation system. METHODS We retrospectively reviewed 148 consecutive TKAs in 130 patients beginning in July 2005. Seventy knees (62 patients) underwent conventional TKA, and 78 knees (68 patients) received navigated TKA. We investiga...

Computer navigation and fixator-assisted femoral osteotomy for correction of malunion after periprosthetic femur fracture.

Periprosthetic femoral fracture post-total knee arthroplasty can lead to malunion. This may lead to abnormal force transmission and accelerated wear of the prosthesis. Accurate femoral deformity correction depends on the combined correction of the mechanical axis alignment and the lateral distal femoral angle. Modern external fixation correction devices allow for simultaneous gradual correction...