The anterior cruciate ligament (ACL) is cited as the most frequently injured ligament in the knee that requires surgical reconstruction. Data
Interestingly, over this same time period, age-adjusted rates of ACL reconstruction increased by 924% among patients younger than 15 years. This likely reflects an increased participation in youth sports among adolescents in the US. From 1994-2006, there was a large increase in the number of procedures performed using regional blocks: 0.7% to 30.8%.
-Source: Orthopaedic Journal of Sports Medicine, Jan. 5, 2015