Juvenile Kyphosis is the most freçuent cause of structural kyphosis in the adolescence period. Many theories have been proposed for the etiology. These theories are avascular necrosis, herniation of disc material through the grovvth plate, repetitive strains, mechanical and static deforming forces, juvenile osteoporosis and congenital col-lagen aggregation disorders. Juvenile kyphosis shows very high famiiiar occurrence. The characteristic feature is a wedge-shaped deformity of middle or lower thoracic vertebrae. The clinical onset is around puberty. The complaints are poor posture, fatigue or pain. Rarely, the symptoms of spinal cord compres-sion may be seen. Radiographic findings include three adjacent vertebrae with ıvedging of each vertebra of 5 deg-rees or more. Hyperextension x-rays must be taken in ali cases to determine rigidity. Biomechanically, replacing the çenter of gravity which results from acute angular deformity, is led to increase deforming forces on the anterior elements. The treatment of Juvenile Kyphosis is based on the severity of the deformity, the presence of pain and the age of the patient. Before skeletal maturity, bracing is the most effective method in treatment. When the deformity can not be controlled by bracing, surgery is indicated. The success of operative treatment is based on the choice of the surgical approach.

Keywords: Juvenile Kyphosis, Biomechanics, Treatment.