METHOD FOR TEETH IMMOBILIZATION WITH MILLED CERAMIC SPLINTS Russian patent published in 2024 - IPC A61C8/00 

FIELD: medicine.

SUBSTANCE: invention relates to orthopedic dentistry, and is intended for use in immobilizing teeth. Oral hygiene is performed in 3 stages. At the first stage, ultrasonic cleaning is carried out using a dental ultrasonic scaler, supra- and subgingival dental deposits are removed. At the second stage, dental deposits and plaque are removed with the help of a directed flow of water, air and abrasive powder. At the third stage, the cleaned surfaces are polished with brushes and polishing pastes, then the tooth surface is polished with rubber heads from the polishing set, first, polishing with the first rubber head, then with the second rubber head, which is softer than the first rubber head, to mirror luster. Then transparent fluoride lacquer is applied on tooth surface. Then, polymer register is modeled in computer program Exocad Align Technology and polymer register is made from Dental Yellow Clear Pro by 3D printing method, to hold movable teeth in a given position. Then, using a cylindrical diamond bur with a rounded edge with a working part diameter of 1.6 mm, a working part length of 4 mm, a grain size of 105–120 mcm, a furrow with width of 1,600 mcm and depth of 800 mcm in the tissues of the prepared teeth, wherein the polymer register holds the movable teeth in a given position. Then, a virtual impression is obtained by scanning separately the upper and lower dental arches of the patient without a polymer register and with a polymer register using the Medit i700 intraoral 3D scanner, as well as bite scanning to obtain a bite register. Further, the virtual impression of the patient's dentition and the bite register is compared by adding stl-files of the obtained virtual impressions separately of the upper and lower dental rows of the patient without a polymer register and with a polymer register, as well as in the bite, in the computer program Exocad Align Technology. Then the shape of the simulated dental splint is modeled in the computer program Exocad Align Technology on the lingual surface of the immobilized teeth with width of 2–3 mm throughout in the immobilization zone, at distance of 1 mm from the edge of the marginal gingiva. Width of the simulated dental splint overlaps the furrow along the entire perimeter by 1 mm. After applying the contour of the simulated dental splint in the computer program Exocad Align Technology, the thickness of the simulated splint is set to 800 mcm, and in the area of the furrow thickness of 1,600 mcm and a layer of fixing material of 50 mcm, after which the obtained data are transmitted to the milling machine, where dental splint is milled from zirconium dioxide block Preshade 1,100 MPa, Omitec. Further, the dental splint is polished and fitted on the teeth in the oral cavity, after which the splint is fixed on the dual-curing composite cement Maxcem Elite, Kerr.

EFFECT: method enables to immobilize teeth mobility with ceramic splints, providing high accuracy of adhesion and reliable installation in the specified position during splinting of movable teeth prone to periodontitis, with minimum preparation of hard tissues of prepared teeth.

1 cl, 10 dwg, 1 ex