posterior cruciate ligament injury "
اینم متن انگلیسی مطلب پایینی :
" posterior cruciate ligament injury "
Background
The posterior cruciate ligament (PCL) is described as the primary stabilizer of the knee by many authors. PCL injuries are less common than anterior cruciate ligament (ACL) injuries, and they often go unrecognized. The PCL is broader and stronger than the ACL and has a tensile strength of 2000 N. Injury most often occurs when a force is applied to the anterior aspect of the proximal tibia when the knee is flexed. Hyperextension and rotational or varus/valgus stress mechanisms also may be responsible for PCL tears. Injuries may be isolated or combined with other ligamentous injuries. A PCL tear can result in varying degrees of disability, from no impairment to severe impairment.
The primary function of the PCL is to prevent posterior translation of the tibia on the femur. The PCL also plays a role as a central axis controlling and imparting rotational stability to the knee. This injury has received little attention in the past, compared with the ACL; however, this emphasis on the ACL has stimulated increased interest in the treatment of PCL injuries. Controversy regarding treatment exists in the literature, with recommendations supporting both operative and nonoperative therapy.
دن زانو, اعمال نیروهایی از سمت خارج به داخل زانو و یا باز شدن بیش از اندازه زانو (Hyper extension ) سبب صدمه دیدگی رباط صلیبی قدامی ( ACL ) شوند.