The of study is to increase the effectiveness of orthopedic rehabilitation of patients with postoperative jaw defects using various types of replacement structures, taking into account the clinical and morphofunctional characteristics of oral tissues after surgery.

Formation of three groups of patients Patients with extensive jaw defects after surgery for oncological disease of the middle zone of the face (10 people) Patients with jaw defects after complicated tooth extraction (20 people) Healthy volunteers to determine reference values (5 people) Data on the functional state of the dentoalveolar system in the study groups of patients will be obtained.

An assessment will be made of the rate of formation of a postoperative defect in patients with postoperative jaw defects, depending on the design features of the prosthesis.

Defects of the jaw will be replaced with orthopedic structures, taking into account the individual characteristics of the state of the marginal part of the defect.

Data will be obtained on the rate of adaptation and quality of life in patients using dentures made taking into account the assessment of the state of the marginal part of the defect.

Clinical recommendations for dentists will be proposed, which will optimize the process of orthopedic dental treatment, taking into account the state of the marginal part of the defect in patients with postoperative jaw defects.

Inclusion Criteria:

• Men or women over 30 years of age. The presence of a postoperative defect of the jaw after surgical interventions.

Exclusion Criteria:

• Men or women under 30 years of age. Decompensated somatic pathology. Pregnancy or breastfeeding in women. Participation in another study.