METHOD OF HIP REPLACEMENT USING CORRECTIVE OSTEOTOMY Russian patent published in 2024 - IPC A61B17/56 A61B6/03 

FIELD: medicine; traumatology; orthopedics.

SUBSTANCE: invention can be used for hip replacement using corrective osteotomy. On the radiograph, an anatomical axis (A) is drawn in the proximal part of the deformed femur and axis (B) in the distal part of the deformed femur, the intersection of axes (A) and (B) is designated by a point (C). A line (D) is drawn along the contour of the inner cortical layer of the distal femur until it intersects with line (B) at point (E) and further until it intersects with the outer cortical layer of the proximal femur at point (F). The resulting angle (DEB) is measured and the value subtract from 90°, getting the difference in angles. The measuring instrument is positioned perpendicular to the anatomical axis (A) of the distal femur so that its zero position coincides with point (C) and forms an angle of 90°. The previously obtained difference in angles is noted and a line (G) is drawn through the outer contour of the femur in the projection of the visible vertex at point (H) with an intersection at point (C) to line (D) to form point (I), thus forming a triangle (HIF). The width of the femur is measured at the level of point (I). The resulting value is multiplied by 2.5. The anatomical axis (A) in the proximal part and the anatomical axis (B) in the distal part are applied to the femur. A point (C) is marked at the intersection of the anatomical axes (A, B) of the proximal and distal sections. An osteotomy is performed along line (D) along the contour of the inner cortical layer of the distal femur until it intersects with line (B) at point (E) and further until it intersects with the outer cortical layer of the proximal femur at the corresponding point (F). An osteotomy is performed from point (C) at an angle, the value of which is defined as the difference in angles with the formation of a line (G) passing through the outer contour of the femur in the projection of the visible apex at point (H) to line (D) with an intersection at point (I), thereby forming a triangle (HIF). The proximal and distal parts of the deformed femur are closed. The femoral component is set to the obtained value.

EFFECT: method provides a high result of bone fusion, minimal risk of neurological development, reliable primary stability, restoration of alignment when compared to the proximal and distal femur at the time of implantation of the femoral component due to preoperative planning with calculation of angles, determination of the triangle along which bone resection will be performed.

1 cl, 5 dwg, 1 ex