Table of Contents
- Torn meniscus facts
- Introduction to the knee
- What is a torn meniscus?
- What causes a meniscus to tear?
- What are symptoms and signs of a torn meniscus?
- How do health-care professionals diagnose a meniscus tear?
- What types of doctors treat a torn meniscus?
- What is the treatment for a torn meniscus?
- Can a meniscus tear heal without surgery?
- What is rehabilitation and recovery like for a patient with a meniscus tear?
- What are recommended exercises once a torn meniscus has been repaired?
- What is the prognosis of a torn meniscus? Is it possible to prevent a torn meniscus?
What causes a meniscus to tear?
A forceful twist or sudden stop can cause the end of the femur to grind into the top of the tibia, pinching and potentially tearing the cartilage of the meniscus. This injury can also occur with deep squatting or kneeling, especially when lifting a heavy weight. Meniscus tear injuries often occur during athletic activities, especially in contact sports like football and hockey. Motions that require pivoting and sudden stops, in sports like tennis, basketball, and golf, can also cause meniscus damage.
The risk of developing a torn meniscus increases with age because cartilage begins to gradually wear out, losing its blood supply and its resilience. Increasing body weight also puts more stress on the meniscus. Routine daily activities like walking and climbing stairs increase the potential for wear, degeneration, and tearing. It is estimated that six out of 10 patients older than 65 years have a degenerative meniscus tear. Many of these tears may never cause problems.
Because some of the fibers of the cartilage are interconnected with those of the ligaments that surround the knee, meniscus injuries may be associated with tears of the collateral and cruciate ligaments, depending upon the mechanism of injury.
While the normal cartilage is "C" or crescent shaped, there is a variant shape that is oval or discoid. This meniscus is thicker and more prone to injury and tearing.
Dutton, M. Dutton's Orthopedic Examination, Evaluation and Intervention, 3rd edition. McGraw Hill Medical, 2012.
Johnson, D.H., and D.A. Pedowitz. Practical Orthopedic Sports Medicine and Arthroscopy. Philadelphia, PA: Lippincott Williams & Wilkins, 2007.
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