INDIVIDUAL 3D IMPLANT FOR SHOULDER JOINT REPLACEMENT IN SHOULDER DEFECTS AND METHOD OF SHOULDER JOINT ENDOPROSTHETICS IN SHOULDER DEFECTS Russian patent published in 2023 - IPC A61F2/40 A61B17/58 

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to oncology, traumatology and orthopedics, in particular to reconstructive plastic surgery when performing replacement of defects in the scapula. A 3D implant is made using the technology of layer-by-layer fusion of finely dispersed metal powder DMLS from Ti64ELI material. The 3D implant contains a body, a base, and an anatomical or reverse plastic glenoid made of ultra-high molecular weight polyethylene, and the body contains: three longitudinal through holes for screws with fixing plugs, a coracoid process with holes for fixing muscles and ligaments, as well as anterior and posterior plates with transverse holes for screws, and the surface of the body adjacent to the bone has a rough surface 1 mm thick in the form of a three-dimensional mesh structure with pores of 1 mm, and the base has the shape of a cone with a seat for the installation of glenoid. Before installing a 3D implant, a plastic try-in template is used to determine the resection border, a try-on is performed with the installation of a product template, after resection, the plane of contact with the implant is finalized, after resection planes are finalized according to the product template and the necessary fit is achieved, a designer template is installed on the scapula, holes are made under the screws, the implant is fixed to the bone using four fixing screws, and three fixing screws have fixing plugs, the front and back linings of the body are attracted to the scapula with two long and one short screws through the holes, then the base is installed on the body and fixed through the hole to body with a fixing screw, after which it is blocked with a cork, bone cement is applied to the surface of the base and a glenoid is installed. Moreover, during resection of the head of the humerus, a reverse glenoid is installed, and if resection of the head of the humerus is not performed, then an anatomical one.

EFFECT: proposed method makes it possible to design an endoprosthesis in such a way that, after its installation and fixation, the geometric parameters correspond as much as possible to the shape and symmetry of a healthy scapula, and the area of fixation and attachment of the device to the scapular bone exactly repeats its shape, which ensures a snug fit of the device to the bone, and the use of individually designed templates for resection and templates-constructors allows to accurately prepare and execute a seat for the device, to reduce the time of the operation.

3 cl, 14 dwg, 2 ex