Prof. Dr. Ibrahim Mustafa Clinic - Professor of Orthopedic and Joint Surgery at the Faculty of Medicine and Head of the Orthopedic Department - Member of the University Professors Promotions Committee - Member of the Scientific Research Ethics Committee - Consultant in Orthopedic and Joint Surgery for the Hospitals of the Therapeutic Institution - Consultant in Artificial Joint Surgeries - Consultant in Arthroscopic Knee Joint Surgery and Treatment of Sports Injuries And injuries to knee cartilage and cruciate ligaments - Member of the Egyptian Orthopedic Association - Member of the American Academy of Orthopedic Surgery - Member of the International Swiss Society for Fracture Fixation