METHOD FOR MANUFACTURING HIP JOINT SPACER AT NON-OPERABLE ACETABULUM AND ACETABULUM COMPONENT OF HIP JOINT SPACER Russian patent published in 2021 - IPC A61F2/34 A61F2/32 

FIELD: medicine.

SUBSTANCE: method for manufacturing a hip joint spacer at a non-operable acetabulum includes the construction, based on radio diagnostics data of pelvic bones and proximal femur of a patient, of 3D models of bone defects of pelvic bones and proximal femur, as well as acetabulum and femoral components of the spacer, the manufacture of fitting models of acetabulum and femoral components of the spacer according to constructed 3D models, filling manufactured fitting models with silicone to obtain silicone molds for acetabulum and femoral components, filling silicone molds with bone cement with antibiotic with additional reinforcement of the femoral component with a metal rod, removal of silicone after polymerization of cement to obtain acetabulum and femoral components of the hip joint spacer for implantation in the defect area. Based on constructed 3D models, the location of spongy screws for fixing the acetabulum component of the spacer to preserved bone edges of the defect is preliminarily determined, according to which, in the 3D model of the acetabulum component of the spacer and its fitting model, holes are formed for placing the specified screws in them and corresponding recesses along the perimeter of holes for caps of screws from the inner surface of the acetabulum component, specifying directions of passage of screws. Before filling the fitting model of the acetabulum component of the spacer with silicone, rods are installed in holes in accordance with the planned arrangement of spongy screws to ensure the formation in the silicone mold of the acetabulum component of reciprocal channels for these rods and protrusions corresponding to recesses for screw caps, ensuring the formation of reciprocal recesses for screw caps from the inner surface of the acetabulum component, when filling the silicone mold with bone cement. Before filling the silicone mold of the acetabulum component with bone cement, rods are installed in the specified channels that ensure the formation of holes in the acetabulum component of the spacer after polymerization of cement to place spongy screws in them.

EFFECT: invention provides a stable fixation of the spacer in the non-operable acetabulum and the return of the rotation center of the hip joint to an adequate position.

2 cl, 10 dwg