A torn meniscus root is a tear in the meniscal cartilage in the knee. There are two crescent-shaped menisci in each knee located on the outside (lateral) and on the inside (medial). The meniscal cartilage acts as a cushion to absorb impact over a larger surface area in the knee joint between the thighbone and the shinbone. Both the lateral and medial menisci provides stability when walking, running, or pivoting. The root is the anchor point of the meniscus on the tibia surface. If a torn meniscus root occurs, it can cause pain, instability and ultimately lead to the development of osteoarthritis. A meniscal root tear can occur in one of two ways, either from trauma or degeneration. Traumatic tears usually occur in a younger, athletic population in the lateral meniscus and can also be associated with an ACL tear. It may stem from a sudden twist in the knee. Degenerative tears typically occur in middle-aged individuals, more commonly affecting the medial meniscus in the female population due to wear and tear. Dr. Riley J. Williams, orthopedic knee specialist serving Manhattan, New York City and the surrounding New York boroughs, has extensive experience in treating meniscus root tears and other cartilage repairs and restorations.