METHOD FOR CROWN RESTORATION Russian patent published in 2015 - IPC A61C13/00 

FIELD: medicine.

SUBSTANCE: root canal of a broken tooth is filled up to a physiological opening under X-ray control. The root canal is milled at two-thirds of overall length in diameter equal to that of a fibre glass pin to be used in the tooth. A seat protrusion with a cylindrical side surface surrounding a root canal aperture is formed. The milled root canal and an outer surface of the root are imprinted in silicone to produce a model, wherein the fibre glass pin is mounted into the reflected root canal. Intraradicular and supraradicular root inlays are modelled in wax on top of the pin. Along the outline of the modelled inlay, a circular shoulder skewed at an angle of 45 degrees is milled, and the fibre glass pin is removed. The produced wax structure is scanned in a module of CAD/CAM system. The virtual image is transferred to a computer unit, followed by milling of a ceramic block. The produced structure is mounted in the oral cavity on glass-ionomer cement. An artificial crown is made and attached to the above structure.

EFFECT: method enables restoring the broken clinical crown of the tooth and a thinned broken neck subgingival root by means of a permanent orthopaedic structure made of a bioinert material with a possibility to conduct a root canal treatment, if necessary.

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