METHOD OF INSTALLATION OF INDIVIDUAL STRUCTURES IN THE COTYLOID CAVITY AREA WITH EXTENSIVE BONE DEFECTS Russian patent published in 2019 - IPC A61B17/56 A61F2/34 

FIELD: medicine.

SUBSTANCE: invention relates to medicine. Method for installation of individual structures in the area of cotyloid cavity with extensive bone defects involves performing computed tomography of pelvis, constructing three-dimensional model of defect area, spatial orientation of the acetabular joint component, virtual designing of the individual implant with its optimal location relative to the bone defect with subsequent implantation of the individual component and its fixation with screws. Computer tomography data are used to simulate a border impression of the remaining bone and a guide for the cutter spatially and geometrically coinciding with the individual cotyloid component, such that the imprint of the bone surface copies the immovable bone sections and undergoes treatment, is located within the defect without difficulty on the side of the surrounding tissues and occupies the only possible position with close contact to the bone surface. Then, in the area of the immovable bone segment, two parallel pins are inserted into the holes of the channels located identically to the channels in the milling cutter guide; an imprint is removed from the area of the bone defect. Then, a guide for the cutter is installed on the pins through the guide channels until tight contact with the bone surface, the guide part of which is a part of the wall of the cylinder with a given position, direction, orientation and a mark of the depth of bone processing, the inner diameter of which coincides with the outer diameter of the cutter. Milling cutter of the required diameter is applied to the specified depth and with the specified spatial position corresponding to the position of the individual acetabular component, after which the guide for the cutter is removed, the individual acetabular component of the endoprosthesis is installed and fixed with screws.

EFFECT: invention provides accurate positioning of individual components, as well as provides a maximum area of contact of the porous surface of the implant with the patient's bone and reliable primary fixation of the cotyloid component.

1 cl, 8 dwg