METHOD OF FIXING ZIRCONIUM DIOXIDE RESTORATIONS AFTER TOOTH EXTRUSION Russian patent published in 2024 - IPC A61C13/00 A61K6/818 A61P1/02 

FIELD: medicine.

SUBSTANCE: invention relates to dentistry and can be used in dental prosthetics. Crown is made and fitted, the crown cavity is treated with aluminium oxide powder, the prepared teeth are processed and dried, the crown placed on the virgin tooth is cleaned and polished. Crown is made with a polished neck the size of which is equal to the difference between the probing depth and the average size of the sulcus of adjacent teeth. Tooth is etched. Bonding agent is applied on the tooth, preventing polymerisation of the bonding agent components, and the bonding agent is dried with a sterile surgical saliva ejector. Crown cavity is treated with aluminium oxide powder with particle size of 50 mcm, under pressure of 1.1–1.3 atm from distance of 12–15 mm. Outer surface of the crown is treated with a universal adhesive. Then crown is fixed on virgin tooth with self-adhesive cement of double hardening, introduced into cavity of crown in liquid phase. Cement in liquid phase is washed off in subgingival region and preliminary cleaning of crown is performed with non-melting of marginal fit. Final polymerisation of the cement is carried out with a light-emitting diode lamp installed for 18–20 seconds on the surface of the crown on each side before finishing polishing, checking the occlusion and before X-ray control of cement residues.

EFFECT: method makes it possible to improve fixation of zirconium dioxide crown after extrusion.

3 cl, 3 ex