Prospective study of 393 adolescent thoracic hyperkyphosis patients treated by the Lyon method

Results Conservative treatment was indicated in 393 patients. 27% of patients do not accept the proposed treatment or interrupt it spontaneously. 23% of patients have a physiological angulation less than 44° at the end of treatment. 43% of patients were reviewed two years after removal of the brace. The initial kyphosis angle was 60.5°. The final angulation 2 years after removal of the brace was 41°. Among the 262 patients who performed the full treatment: All patients who had pain before treatment were relieved of that pain after treatment began. 79% were fully corrected with final angulation < 45°. 17% were stabilized with a final angulation between 45° and 55°. 11% retained an angle of > 55° and can be considered as treatment failures. In total, 222 patients were reviewed more than 10 years after removal of the brace. The angle remains stable in 21 cases.