[Geometric osteotomy of the femur and tibia in children according to Tylman]

Geometric osteotomy and the results of treatment of axial deformities of lower extremities with this method have been presented. The major point of the procedure is cutting out a solid figure, usually a triangle based prism in order to achieve large contact surface and decrease muscle leverage at the site of the osteotomy. The method has been used in 12 operations around the hip and in 19 around the knee. Good results have been achieved with the exception of 4 children operated around the knee (3 of them because of Blount disease); the results were rated fair.