How long it takes for a posterior meniscus horn injury to heal is affected by a number of factors such as the severity of the condition, treatment options, timing of treatment, age and body type, and there are individual differences.
Usually acute injuries to the posterior meniscus horn are caused by direct violence such as trauma, if no surgery is indicated, the long leg can be fixed in a plaster cast for about 4 weeks, during which time internal anti-swelling and pain-relieving medication or external plasters can be applied, and normal life can be resumed in 2-3 months. Chronic injuries such as degenerative lesions with age, or those with surgical indications, mostly require partial or complete removal of the meniscus, with recovery time generally exceeding 6 months.