A comparison of coronal plane axial femoral relationships in Asian patients with varus osteoarthritic knees and healthy knees.
Standing full-length radiographs were measured to compare coronal femoral axes between 250 limbs in patients with varus osteoarthritis with 50 healthy controls. Mean distal femoral axis-mechanical axis angle was 7.3 degrees +/- 1.6 degrees , and mean femoral bow was 3.6 degrees +/- 2.5 degrees in patients compared to 5.5 degrees +/- 0.8 degrees and 0.4 degrees +/- 1.2 degrees , respectively, in controls. Femoral condylar-mechanical axis angle was significantly lower in osteoarthritic limbs (89.9 degrees + 2.8 degrees ) as compared to controls (93.1 degrees + 1.6 degrees ). Varus deformity correlated significantly with femoral bowing (P < .05; correlation coefficient, 0.4). Osteoarthritic limbs (18.8%) showed a distal femoral axis-mechanical axis angle more than 9 degrees . These findings have implications in deciding the optimum valgus angle at which to perform distal femoral resection in total knee arthroplasty.
Mullaji
Arun B
AB
Department of Orthopedic Surgery, Breach Candy Hospital, Mumbai, India.
Marawar
Satyajit V
SV
Mittal
Vivek
V
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee; D044466:Asian People; D001696:Biomechanical Phenomena; D016022:Case-Control Studies; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D016916:Joint Deformities, Acquired / Q000000981:diagnostic imaging* / Q000208:ethnology / Q000473:pathology; D007719:Knee Joint / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000000981:diagnostic imaging* / Q000208:ethnology / Q000473:pathology; D011859:Radiography; D016059:Range of Motion, Articular