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Medial knee injuries (those to the inside of the knee) are the most common type of knee injury. [1] The medial ligament complex of the knee consists of: [2] superficial medial collateral ligament (sMCL), also called the medial collateral ligament (MCL) or tibial collateral ligament; deep medial collateral ligament (dMCL), or mid-third medial ...
An anterior cruciate ligament injury occurs when the anterior cruciate ligament (ACL) is either stretched, partially torn, or completely torn. [1] The most common injury is a complete tear. [ 1 ] Symptoms include pain, an audible cracking sound during injury, instability of the knee, and joint swelling . [ 1 ]
The posterior cruciate ligament is located within the knee. Ligaments are sturdy bands of tissues that connect bones. Similar to the anterior cruciate ligament, the PCL connects the femur to the tibia. There are four different grades of classification in which medical doctor's classify a PCL injury: Grade I, the PCL has a slight tear.
The unhappy triad, also known as a blown knee among other names, is an injury to the anterior cruciate ligament, medial collateral ligament, and meniscus.Analysis during the 1990s indicated that this 'classic' O'Donoghue triad is actually an unusual clinical entity among athletes with knee injuries.
The tibia is then pulled forward. If there is 6 to 8 millimeters of laxity, with no definitive resistance when the knee is pulled, then the test is positive thus raising concern for a torn anterior cruciate ligament. A large collection of blood in the knee can be associated with bony fractures and cruciate ligament tear. [1] [2]
It refers to the appearance of a duplicated posterior cruciate ligament, where the displaced fragment of the torn medial meniscus lies parallel and inferior to the PCL, mimicking a second ligament. [1] The double PCL sign has high specificity for meniscal tears when noted on MRI. [2] [3]
Traumatic events: Sudden twisting or pivoting movements with the knee in flexion and rotation. Degenerative knees: Less commonly, a bucket-handle tear can occur in older individuals with preexisting meniscal degeneration. The injury frequently occurs in conjunction with anterior cruciate ligament (ACL) tears.
Grade 2: Many of the ligament fibers are torn, and pain and swelling is moderate. The functionality of the joint is compromised. Grade 3: The soft tissue is completely torn, and functionality and strength on the joint is completely compromised. In most cases, surgery is needed to repair the damage.
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