METHOD FOR HIP ARTHROPLASTY WITH NARROW MEDULLARY CANAL OF FEMUR Russian patent published in 2021 - IPC A61B17/56 A61B17/72 

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to traumatology and orthopedics, and can be used to install the femoral component of the endoprosthesis into a narrow medullary canal of the femur in dysplastic coxarthrosis. A transverse osteotomy of the femur is performed at the level of the middle of the true acetabulum and a longitudinal osteotomy of the proximal femur, followed by removal of the head and medial part of the proximal femur and retraction of the greater trochanter with preserved tissue complex. The medullary canal of the femur is modeled according to the shape of the femoral component. An endoprosthesis is installed and the greater trochanter is fixed with a complex of tissues on the proximal femur. In this case, the osteotomy of the femur is performed from the outside by half the length of the stem of the endoprosthesis and a depth of 1/2 the width of the femur. The inner surface of the femoral medullary canal remaining from the outside after osteotomy is modeled according to the shape of the endoprosthesis stem. The sawn-off surface of the prepared osteotomized greater trochanter with the preserved complex of tissues is modeled according to the shape of the proximal femur with the stem of the endoprosthesis inserted into it. Fix with screws to the longitudinal surfaces of the sawdust of the wall of the femur.

EFFECT: invention provides primary fixation of the femoral component of the hip joint endoprosthesis while excluding splitting and the risk of fractures and cracks along the length of the femur under conditions of tight fit of the stem of the endoprosthesis by performing a longitudinal osteotomy of the proximal femur from the outside so that enough bone remains after treatment of the medullary canal for fixing the large trochanter.

1 cl, 8 dwg, 1 ex