«Efecto del descenso de tibial posterior en el rango de movimiento después de la artroplastia total de rodilla.»
Devanshu Kansara MDa, b and David C. Markel MD, a, b
aDepartment of Orthopaedic Surgery, Wayne State University, Detroit, Michigan bDepartment of Orthopaedic Surgery, Providence Hospital, Southfield, Michigan
Posterior slope has been theorized as advantageous to range of motion (ROM) after total knee arthroplasty. This study was undertaken to assess the accuracy of a 0° and a 5° posterior sloped intramedullary (IM) cutting guide and the effect of the posterior tibial slope on postoperative ROM. Thirty-one consecutive patients underwent total knee arthroplasty using a cutting block and intramedullary cutting guide designed to impart a 0° posterior tibial slope (group 1). A 5° tibia cutting block was used in 30 subsequent patients (group 2). The posterior slope measurement represented the angle between a line drawn parallel to the articular surface and a line drawn perpendicular to the long axis of the tibia on a lateral radiograph. Mean postoperative tibial slope measured 1.8° for group 1 and 5.5° for group 2. There was no significant difference between groups for postoperative flexion or improvement of Hospital for Special Surgery score. The tibial cutting guides accurately achieved the intended posterior slope, but increasing posterior slope did not result in a significant increase in ROM or Hospital for Special Surgery functional score.
The Journal of Arthroplasty. Volume 21, Issue 6 , September 2006, Pages 809-813.