METHOD FOR FIXATION TO TITANIUM BASES OF A PREFABRICATED TEMPORARY CONDITIONALLY REMOVABLE MILLED PLASTIC PROSTHESIS USING BUSHINGS PRINTED ON A 3D PRINTER Russian patent published in 2023 - IPC A61C8/00 

FIELD: orthopedic dentistry.

SUBSTANCE: treatment of patients using temporary conditionally removable milled prostheses based on transmucosal abutments of dental implants of a collapsible navigational surgical template. After anesthesia for the patient and installation of dental implants, transmucosal abutments are fixed to the installed dental implants using a collapsible navigational surgical template, to which titanium bases are then fixed. The titanium base is scanned with an optical 3D scanner and a 3D object is obtained in the form of an STL file, which is then added to the 3D modeling program and the bushing is designed, and the outer diameter of the bushing matches the inner diameter of the titanium base, and the inner diameter of the bushing matches the outside diameter of the screwdriver. The bushings are printed on a 3D printer and installed in the shafts of the titanium bases in such a way that the bushing is fixed in the titanium base, but at the same time it would allow turning the screw to fix the titanium base with the rotational movements of the screwdriver. Next, on the base of the collapsible surgical template, a temporary conditionally removable milled plastic prosthesis with mating parts for lodgements is fixed. The space between the outer part of the titanium bases and the inner part of the temporary conditionally removable milled plastic prosthesis is filled with fast-hardening plastic, after which the bushings are removed from the shafts of the titanium bases. The temporary conditionally removable milled plastic prosthesis is removed, the mating parts for the lodgements are removed, the final grinding and polishing is performed, and then it is fixed to the installed transmucosal abutments using screws.

EFFECT: due to the precise fit of the temporary orthopedic structure, it allows, on the day of the operation, reliable fixation to the titanium bases of a pre-fabricated milled plastic prosthesis, reduces the treatment time, increases the reliability of the orthopedic structure and its long-term operation.

1 cl, 5 dwg, 3 ex