Name: Anterior Cruciate Ligament Injury
Description: Torn ACL
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The knee is essentially a modified hinge joint located where the end of the thigh bone (femur) meets the top of the shin bone (tibia). Four main ligaments connect these two bones:
The ACL and PCL cross each other inside the knee, forming an
The ACL is the most commonly injured ligament in the knee. It can be torn when a twisting force is applied to the knee while the foot is firmly planted on the ground or upon landing, or from a direct blow to the knee, usually to the outside of the knee, as may occur during a football tackle. The most common sports where ACL injuries occur are soccer, basketball, tennis, volleyball and skiing. ACL injuries are more common in women for a variety of reasons including anatomical difference and the effect of female hormones on the joints.
The symptoms of a torn ACL include:
- An audible pop or crack at the time of the injury
- Inability to stand of the leg with a feeling of joint instability
- Extreme pain and knee tenderness
- Knee swelling
- Decreased ability to move the knee
Rest, Ice, Compression, and Elevation). Medical attention should be sought to thoroughly evaluate the injury. If the tear is mild and not completely through the entire ligament, conservative management including immobilization with a knee brace and physical therapy may surfice. If the ligament is completely torn, it can not be repared, but must be replaced, usually during arthroscopic surgery.
|Overview of ACL injury|
|Good overview from Medline Plus with good diagrams|
|Good overview of knee problems|