The level of the joint line after cruciate-retaining total knee replacement: a new coordinate system.
This study assessed joint line changes after knee replacement surgery. Sixty consecutive cruciate-retaining total knee replacements were followed up. The height of the femorotibial joint line in extension and in 90 degrees flexion were analysed. A new coordinate system was used. It is based on two perpendicular axes applied to a lateral X-ray: one axis is drawn along the anterior cortex of the distal femur and the other axis overlies the intersection of the inter-condylar roof and the posterior femoral condyles. In patients with non-posterior stabilised implants, the landmarks chosen appear to be reliable and useful. In this study, the femorotibial joint line was displaced distally, and the surgical instrumentation was changed accordingly.
Rouvillain
Jean-Louis
JL
Orthopaedic and Traumatologic Department, La Meynard University Hospital, BP 632- 97261 Fort de France Martinique, France. jlrouvillain@sasi.fr
Pascal-Mousselard
Hugues
H
Favuto
Marc
M
Kanor
Marc
M
Garron
Emmanuel
E
Catonne
Yves
Y
D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging* / Q000503:physiopathology; D007720:Knee Prosthesis; D011859:Radiography; D016059:Range of Motion, Articular