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Аннотация
The article presents a complex clinical case of fibroepi-thelial hyperplasia of the oral mucosa and describes the orig-inal method of reconstruction of extensive tissue deficiencydeveloped intraoperatively during similar pathologies. Thepatient, a 65-year-old woman, had been using an improperlymade prosthesis for about 10 years, resulting in the develop-ment of excess tissue growth in the maxillary dentoalveolararea.Three tissue duplicates were objectively detected in thefrontal area of the upper jaw and double tissue duplicates inthe right and left lateral areas of the maxilla, passing to theinner surfaces of the cheek. Significant tissue deficiency,which arose intraoperatively, was supplemented by mobili-zation of trapezoidal debris of the mucous membrane fromthe inner surfaces of the upper lip and cheeks.In order to maintain the height of the gate arch, the trap-ezoidal slits of the mucous membrane, both in the frontal andlateral areas, were initially fastened in the vertical direction,joining the surfaces, and then their free lower edges - in thehorizontal direction, mobilized from the hard palate and ves-tibular area