ABSTRACTBetween August 1988 and August 1993, the Townsend Knee Orthosis (TKO) was used to treat 47 cases with 49 knee injuries at the University of Oklahoma. The injuries were comprised of 12 anterior cruciate ligament- (ACL-) deficient knees, 26 ACL-reconstructed knees and 11 ACL repairs. There were 20 right knees and 29 left knees. Ninety-six percent of patients rated their TKOs as effective, and 71 percent continued to wear their TKOs after two years. The sample was represented by a nearly 2:1 male to female ratio, and the average age was 22 years.