A recent study followed patients who had undergone ACL reconstruction for 15 to 20 years after surgery to review the progression of knee osteoarthritis (OA) and changes in their symptoms and function. Evidence of arthritis was found in the tibio-femoral and patellofemoral compartments of the knee in 42% and 21%, respectively. Patients with ACL injuries and other combined injuries (meniscus or articular cartilage injuries) had significantly higher prevalence of arthritis changes compared with those who had isolated ACL injuries. A significant deterioration in knee symptoms and function was observed.
Source: American Journal of Sports Medicine, May 2016