Knees: The knee joint connects the thigh to the lower leg and allows for bending and weight-bearing. Injuries & Illnesses: ACL tears, meniscus tears, patellar tendinitis, knee osteoarthritis, bursitis. Specialists: Orthopedic surgeons, physiatrists, physical therapists. Procedures & Therapies: Knee surgery (ACL repair, knee replacement), physical therapy (rehabilitation exercises), corticosteroid injections, bracing.