an orthopedic doctor holds an x-ray picture of a patient`s knee. the concept of diseases and injuries of the knee and patella,

background bandage bandaging bending bone burn cap closed comminuted concept crunch doctor flexion foot fracture frostbite girl gloves gypsum hands hospital injury knee kneecap kneejoint leg ligaments medic medical medicinal meniscus mobility pain patella pathology picture procedure quadriceps rupture shinbone sprain surgery tear tendon tendons therapy trauma traumatology treatment white xray