Applied Information Aspects of Medicine (Prikladnye informacionnye aspekty mediciny)Applied Information Aspects of Medicine (Prikladnye informacionnye aspekty mediciny)2070-9277Voronezh State Medical University named after N.N. Burdenko - The State Budgetary Institution of Higher Professional Education «Voronezh State Medical University named after N.N. Burdenko» of the Ministry of Public Health of the Russian1156410.18499/2070-9277-2026-29-1-20-24UnclassifiedThe role of complex orthodontic preparation in the success of orthognactic operations in patients with maxillofacial anomaliesKrayevskayaNatalia Stefanovna<p>Associate Professor of the Department of Dentistry No. 5; Candidate of Medical Sciences, Orthodontist, Head of the Orthodontic Department</p>varrrvara123@mail.ruIvanovAlexander Sergeevich<p>PhD, Associate Professor, Head of the Department of Dentistry No. 5; Chief Physician</p>city-dent@city-dent.ruMazmanyanMilena Ivanovna<p>orthodontist</p>milenayeribekyan@mail.ruBayanduryantsOlga Vyacheslavovna<p>dentist</p>stomvr1@yandex.ruRostov State Medical University of the Russian Ministry of HealthState Budgetary Institution of the Rostov Region "Dental Polyclinic"07042026291202401042026Copyright © 2026, Applied Information Aspects of Medicine (Prikladnye informacionnye aspekty mediciny)2026<p>The aim of the study was to evaluate the influence of the pre-surgical orthodontic preparation stage on the stability of results and patient satisfaction after orthognathic surgeries. Materials and methods. A retrospective analysis was conducted on 42 patients (22 women, 20 men) aged 18-35 years with diagnoses of sagittal, vertical, or transversal jaw abnormalities who underwent comprehensive surgical and orthodontic treatment between 2020 and 2024. The assessment included the analysis of diagnostic models, tele-radiographs (TRG), cone-beam computed tomography (CBCT) data, occlusion index (OI) before and after orthodontic preparation, as well as a questionnaire on the satisfaction scale (OHIP-14). Results. Adequate pre-surgical orthodontic preparation (decompensation) allowed to achieve an average group improvement of the OI from 58.74.2% to 89.33.1% (p0.001). Patients with optimal decompensation (n=29) showed maximum postoperative stability of occlusion (94.2%) and high satisfaction (average OHIP-14 score of 8.2). Patients with insufficient preparation (n=13) were more likely to experience intraoperative complications (38.5% of cases) and recurrences in the long-term period. A strong correlation was found between the degree of decompensation of the lower dentition and the accuracy of surgical planning (r=0.79). Conclusions. High-quality pre-surgical orthodontic preparation is a critical step that directly affects surgical accuracy, stability of the result, and patient satisfaction. The developed evaluation protocol, based on a comprehensive analysis of CBCT, TRG, and models, allows for an 87% more accurate prediction of treatment success compared to using clinical data alone. 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