METHOD OF CORRECTIVE OSTEOTOMY OF THE FEMUR Russian patent published in 2018 - IPC A61B17/56 

FIELD: medicine.

SUBSTANCE: invention relates to traumatology and orthopedics and can be used for corrective osteotomy of femoral bone. 3D program calculates the angle of anteversion, determined by the intersection of the femoral axis axis and the tangential femoral condyles in the horizontal plane, and the cervico-diaphyseal angle, determined by the intersection of the axial axis of the diaphysis and the axis of the femoral neck in the frontal plane. In the intervertebral area in the 3D program, an osteotomy line is made between the proximal and distal sections of the femur. In the frontal plane, the proximal femur is moved until the neck-diaphyseal angle is normalized; formed zone of intersection of the distal and proximal parts of the femur, corresponding to the shape of the bone wedge, in the poligons mode, using the computer command split, isolated and removed. Distal and proximal parts of the femur are correlated. In the horizontal plane, the distal femur is rotated to normalize the angle of anteversion, formed by the intersection of the line of the axis of the neck and the tangential line of the condyles of the femur. Distal linear markers are applied to the distal and proximal parts of the femur. Femoral fragments with attached deterring marks, including a resected wedge, are returned to their original position. When modeling 3D template after 3D modeling of interverting corrective osteotomy of the femur on the distal and proximal parts of the femur, using the split computer command in poligons mode, extract and copy the bone wedge border from the anterior and lateral sides of the femur. Smooth out the edges of the template and give the walls a thickness. By subtraction, the detorsion marks are transfered to the 3D template. During the surgical intervention, after the subperiosteal femoral extraction, a template is placed on the intervertebral area, along which the osteotomy and deterrent marks are applied to the femur. Corrective osteotomy of the femur is performed, the femoral fragments are compared, while in order to correct the anteversion angle, the distal femur is rotated relative to the axis of the diaphysis before comparison of the diester marks.

EFFECT: method allows to adjust the ratio of the neck-diaphysial angle and the angle of anteversion.

1 cl, 15 dwg, 1 appendix