What causes meniscus injury?

What causes meniscus damage?

1. There is usually an obvious history of sprain before a meniscus injury. The obvious history of sprain usually occurs in some specific positions, mainly when the knee joint is semi-flexed and the calf is fixed. At this time, a sudden deep breath or rotation occurs, so that the meniscus does not have time to retreat and is squeezed between the tibial platform. That is, when the knee joint is semi-flexed, if you want to do internal and external rotation or internal and external eversion at this time, the movements of the meniscus and the knee joint will not match. The consequence of the mismatch is like misalignment between gears. Friction occurs where there should be no friction, and squeezing occurs where there should be no squeezing. If the force is strong enough, the meniscus will be squeezed and broken.

2. In addition, there are some long-term wear and tear, such as long-term kneeling or cross-legged or long-term weight bearing, which may cause long-term abrasive external force damage to the meniscus, thus leading to the degeneration of the meniscus. Injury to the meniscus of the knee joint can be said to be particularly common in clinical practice.

What does meniscus injury mean?

The lateral meniscus has a smaller circumference than the medial meniscus, but a wider area. It is annular and nearly O-shaped, slightly wider at the end, slightly narrower at the front and back ends, but wider than the medial meniscus along the entire length. The anterior horn is attached to the back of the anterior cruciate ligament and blends with the cruciate ligament, the hind foot is attached to the back of the intercostal eminence, in front of the attachment point of the posterior horn of the medial meniscus, and the lateral edge is connected to the popliteus muscle, but not to the fibular collateral ligament.

After the injury, most people will experience swelling, pain and dysfunction of the knee joint, feel noise and tearing sensation in the joint, and the knee joint cannot be fully straightened. Some people may also have effusion in the knee joint, which affects their normal walking. The meniscus is a very important tissue structure in the knee joint. There are two menisci in the knee joint, one is the medial meniscus and the other is the lateral meniscus.