The patellofemoral component of total knee arthroplasty.

摘要: Patellofemoral complications continue to form a large proportion (up 50%) of total knee arthroplasty (TKA) complications. If adequate attention is paid intraoperatively patellar tracking and component position, the incidence subluxation, loosening, fracture should decrease. When treating subluxation dislocation, tibial tubercle transfer be avoided because there an unacceptably high Care taken treat underlying cause dislocation with either soft tissue procedure or revision. Fracture patella may treated nonoperatively in 50% 80% patients. Cysts, if large, bone-grafted avoid potential stress loosening. Loosening likely symptomatic require surgery up 75% cases. A displaced attritional wear quadriceps tendon ligament. All rheumatoid patellae resurfaced. The present trend osteoarthritic toward resurfacing more often. With improved implant design predicted decrease complications, become routine. Osteoarthritic that maintain good cartilage, normal anatomic shape, congruent need not