METHOD FOR PREVENTION OF ATROPHY OF ALVEOLAR BONE AND MARGINAL GINGIVA USING ALGINATE MATERIAL "LitAr" Russian patent published in 2024 - IPC A61C7/00 A61K31/136 A01B1/02 A61N5/67 

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to surgical dentistry, and is intended for use in prevention of alveolar bone atrophy immediately after tooth extraction and preparation of prosthetic bed tissues for prosthetics. Non-traumatic tooth extraction is performed with the help of elevators, burs and dental drill. It is followed by curettage of the socket of the extracted tooth and expecting complete filling of the socket with blood. Formed defect is filled with alginate material "LitAr" with silver to 70% by volume. Then the tooth root is sawn into two halves with a straight tip using a disc-shaped bur. One half of the root is treated with a drill with a diamond bur – 5 mm root apex is removed, a root is formed along the perimeter so that the root contour is congruent to the inlet opening into the alveolus. Pulp or old filling material, dentin along the root canal and infected dentin are removed by means of an angular tip with a carbide bur. Root cement and periodontal fibres remain intact. Two holes are formed on the vestibular part of the treated root with a turbine tip with a cylindrical diamond bur. One hole is formed on the oral portion. Diameter of holes is equal to 1 mm. Treated root is placed in the furacilin antiseptic solution for 3 minutes. Then the root is fixed in the inlet opening of the alveoli; the first needle prick in is carried out from the vestibular side below the medial gingival papilla by 3 mm. Needle is brought into the alveolar cavity and brought out through the first vestibular opening in the tooth root so that the periodontal fibres face the alveolus. Needle with the suture material is placed above the root and passes into the apical opening. Needle is inserted from the oral side of the tooth socket and the needle is brought out onto the mucous membrane, 3 mm below the medial papilla. Then the needle is inserted 3 mm below the distal papilla of the alveoli, brought into the alveolar cavity and again delivered through the apical opening in the tooth root. Needle with the suture material is placed above the tooth root and delivered into the second vestibular opening. Needle is inserted from the alveolar cavity from the vestibular side of the tooth socket, and the needle is brought out onto the mucous membrane, 3 mm below the distal papilla of the alveoli. Node is formed on the vestibular side of the alveoli. Patient is prescribed to take orally 0.5 g of alginate material "LitAr" without silver once day for 14 days starting from the day of removal. Patient takes the first intake of the material half an hour before the tooth extraction. Thereafter, the patient takes orally the alginate material "Litar" without silver half an hour before breakfast. In parallel, the area of the extracted tooth is exposed to pulsed radiation with wavelength of 905 nm of a semiconductor laser of the infrared spectral range of a high power level of 30 W, 2.5-min exposure on two extraoral areas on facial skin – in a projection of the medial approximal wall of the extracted tooth and in the projection of the distal approximal wall of the extracted tooth. Therapeutic course is 6-8 daily procedures. First exposure is on the day of tooth extraction.

EFFECT: method by stimulating regeneration, suturing technique and a combination of using the prepared tooth transplant enables to protect the bone material in the socket of the extracted tooth, reducing pain after tooth root extraction, preventing atrophy of the alveolar bone and marginal gingiva in the first three months after tooth extraction with impossibility of single-stage implantation.

1 cl, 2 ex