Femoral Extramedullary Versus Intramedullary Alignment Systems in Total Knee Arthroplasty

A Comparative Study of Femoral Extramedullary and Intramedullary Alignment Systems in Total Knee Arthroplasty

A prospective study will be performed to compare the clinical outcome after total knee arthroplasty (TKA) using two different alignment systems: an extramedullary system versus an intramedullary system. The extramedullary femoral alignment system is newly designed. These two systems are used to make the distal femoral resection in 100 patients in a random order.

Inclusion Criteria:

• Varus knee; degrees of extra articular deformity < 15°; Knee Osteoarthritis; Straight limited < 30°; range of knee flexion > 90°; No hip abnormalities

Exclusion Criteria:

• Valgus knee; degrees of extra articular deformity > 15°; Knee infection; Rheumatic arthritis; Ankylosing Spondylitis; Prior femoral surgery