Your knee is the largest joint in your body and one of the most complex. Because you use it so much, it is vulnerable to injury. Because it is made up of so many parts, many different things can go wrong.
Meniscal tears are among the most common knee injuries. Athletes, particularly those who play contact sports, are at risk for meniscal tears. However, anyone at any age can tear a meniscus. When people talk about torn cartilage in the knee, they are usually referring to a torn meniscus.
How does the meniscus work?
The knee joint is very important in allowing people to go about performing almost any activity. The joint is made up of three bones: the femur (thigh bone), the tibia (shin bone), and the patella (knee cap). The surfaces of these bones within the joint are covered with a layer of cartilage. This important surface allows the bones to smoothly glide against each other without causing damage to the bone. The meniscus sits between the cartilage surfaces of the bone to distribute weight and to improve the stability of the joint.
Sudden meniscal tears often happen during sports. Players may squat and twist the knee, causing a tear. Direct contact, like a tackle, is sometimes involved.
Older people are more likely to have degenerative meniscal tears. Cartilage weakens and wears thin over time. Aged, worn tissue is more prone to tears. Just an awkward twist when getting up from a chair may be enough to cause a tear, if the menisci have weakened with age.
What are the symptoms?
There are three types of meniscus tears. Each has its own set of symptoms.
With a minor tear, you may have slight pain and swelling. This usually goes away in 2 or 3 weeks.
A moderate tear can cause pain at the side or center of your knee. Swelling slowly gets worse over 2 or 3 days. This may make your knee feel stiff and limit how you can bend your knee, but walking is usually possible. You might feel a sharp pain when you twist your knee or squat. These symptoms go away in 1 or 2 weeks but can come back if you twist or overuse your knee. The pain may come and go for years if the tear is not treated.
In severe tears, pieces of the torn meniscus can move into the joint space. This can make your knee catch, pop, or lock. You may not be able to straighten it. Your knee may feel “wobbly” or give way without warning. It may swell and become stiff right after the injury or within 2 or 3 days.
If you are older and your meniscus is worn, you may not know what you did to cause the tear. You may only remember feeling pain after you got up from a squatting position, for example. Pain and slight swelling are often the only symptoms.
How is a meniscus tear diagnosed?
Your doctor will ask about past injuries and what you were doing when your knee started to hurt. A physical exam will help your doctor find out if a torn meniscus is the cause of your pain. Your doctor will look at both knees and check for tenderness, range of motion, and how stable your knee is. X-rays are also usually done.
You may need to meet with an orthopedic surgeon for more testing. These tests may include an MRI, which can give a clear picture of where a tear is and how serious it is.
Treatment of Meniscus Tears
- Meniscal Repair
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