METHOD FOR RECONSTRUCTING AN ALVEOLAR CREST IN THE DISTAL UPPER JAWS FOR INSTALLING DENTAL IMPLANTS Russian patent published in 2019 - IPC A61B17/24 

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to surgical dentistry, maxillofacial surgery, and can be used for reconstruction of the maxillary alveolar process with its atrophy before implant treatment. Method involves a bone restoration operation in the upper-maxillofacial bottom area and recovery of an alveolar ridge width using a membrane. As the walls limiting the reconstruction area, a split alveolar process of the upper jaw is used. Trapezoidal incision of the mucosa to the bone is performed in the area of the proposed reconstruction. Mucoperiosteal flap is exposed, exposing an anterior bone wall of the upper jaw, and a trephine hole is created within maxillary sinus 0.8–1.0 cm in diameter. Mucous membrane of maxillary sinus is mobilized starting from lower sinus medial angle to isolate bone crypts and shoulders of cavity bone cavity to palatal wall. Mucous membrane is lifted and a cavity is created. Then by means of bone thin cutters or piezo-calculator two vertical cuts of vestibular wall are performed to spongy layer of bone tissue in area of proposed reconstruction and one horizontal along crest, trepanizing bone bottom of maxillary sinus. Thus, distal fragment becomes mobile, medial remains fixed to upper jaw body, using a chisel dilute vestibular and palatine fragments without damaging medial joint to required width and fixed with metal screw, reaching necessary volume of upper jaw both in width and height. Formed cavities are filled with osteoplastic material, which is represented by a combination of autopsy collected by a disposable bone scraper, and biodegradable bone substitute material consisting of bovine bone mineral components with granules 0.25–1.0 mm in ratio 1:1. Material is rammed, the created volume is closed with a collagen membrane, which is fixed with non-resorbable pins, the mucoperiosteal flap is mobilized and closed without tension.

EFFECT: method provides reducing operational and postoperative complications, reducing the length of treatment and creating adequate conditions for further implantation by filling the cavity with biodegradable osseous replacement material.

1 cl, 2 ex