METHOD FOR SURGICAL TREATMENT OF HILL-SACHS OSTEOCHONDRAL LESIONS OF THE HUMERAL HEAD Russian patent published in 2022 - IPC A61B17/56 A61F2/40 

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely, to traumatology and orthopaedics, and can be used for surgical treatment of Hill-Sachs osteochondral lesions of the humeral head. At the preoperative stage, computed tomography of the shoulder joints is performed while scanning at no more than a 1 mm step of the positioning stage in the high-resolution mode while the patient is stationary for the duration of obtaining a full set of tomograms. A computed three-dimensional model of the injured shoulder joint is built; a virtual model of an individual implant is created using hybrid parametric modelling accounting for the post-traumatic deformation of the humeral head and a mirror copy of the three-dimensional model of the humeral head of the contralateral joint. The articular surface of the implant is modelled smooth, while the inner surface in contact with the bone tissue is modelled porous. At least two screw holes are modelled at a distance of at least 5 mm from each other so that the screws are inserted into the strongest areas of the humeral head, according to the computed tomography data. Topological optimisation of the model is performed. An individual implant is made on a 3D printer from a titanium-aluminium-vanadium alloy based on the created model. The articular surface of the implant is polished, the humeral head defect is replaced by screwing the implant through the holes with the set directions of screw insertion.

EFFECT: increase in the effectiveness of surgical treatment, restoration of the biomechanics of the shoulder joint, reduction in the risk of recurrences of humeral head dislocation due to the restoration of the humeral head until matching the anatomical shape.

1 cl, 14 dwg, 2 ex