Functional treatment can be defined as a form of therapy in which the involved segment of the locomotor system is either not immobilized at all or the immobilization is incomplete and lasts only for a limited time. Function of the involved segment is therefore restored during the treatment. Many fractures, especially those of the upper extremity, stable fractures as well as a number of joint injuries such as AC-joint dislocation, ankle ligament rupture and Achilles tendon rupture can be treated functionally. Functional Treatment is an integral part of regular conservative fracture treatment and also important for the operative management of fractures and joint injuries.