Total Knee Replacement TKR
Sometimes also called “resurfacing”, this operation involves the removal and replacement of the damaged, worn ends of the thighbone (femur), and lower leg (tibia) bones that make up the knee joint, as well as the back of the kneecap (patella). The posterior cruciate ligament is a tissue that normally stabilizes each side of the knee joint so that the lower leg cannot slide backward in relation to the thighbone. In total knee replacement surgery, this ligament is either retained, sacrificed, or substituted by a polyethylene post. Arthritis leads to the weight bearing surfaces of the knee joint wearing away. They are no longer smooth and free running and this leads to stiffness and pain. Eventually the joint wears out to such an extent that the bone of the femur (thigh bone) grinds on the bone of the tibia (shin bone). Osteoarthritis often develops in just one compartment of the knee, usually the inner (medial) compartment.
The prosthesis for total knee replacement consist of femoral, tibial, and patellar components as in figure 8. Compared to the hip joint, the knee joint has a more complicated geometry and movement biomechanics, and it is not intrinsically stable.
Fig
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .
الرجوع الى لوحة التحكم
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