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Surgery-First Orthognathic Surgery in Skeletal Class III Treatment

Vietnam60 participantsStarted 2022-03-01

Plain-language summary

This study evaluates the efficacy and stability of the "Surgery-First" approach (SF approach) in treating patients with skeletal Class III malocclusion, utilizing a combined retrospective and prospective data collection method. Unlike the conventional method, the SF approach performs orthognathic surgery first to correct the skeletal discrepancy, followed by orthodontic treatment. The study aims to analyze pre-operative dentoskeletal characteristics, arch morphology, and treatment complexity indices, as well as assess the hard and soft tissue changes at 1 week and 1 year post-surgery using digital dental models and Computed Tomography (CT) scans.

Who can participate

Age range16 Years

SexALL

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Inclusion Criteria: * Female patients aged 16 years or older, and male patients aged 18 years or older. * Diagnosis of skeletal Class III malocclusion. * Meeting the clinical indications for the Surgery-First orthognathic approach. * Treatment plan consensus between the orthodontist and maxillofacial surgeon, aligned with the patient's chief complaint and expectations. * Underwent orthognathic surgery using the Surgery-First approach without pre-surgical orthodontic treatment. * Good general health, fit for general anesthesia. * Voluntarily agreed to participate in the study and provided informed consent. Exclusion Criteria: * Dentofacial deformities secondary to maxillofacial trauma (e.g., midface retrusion due to Le Fort fractures, or mandibular retrusion due to bilateral condylar fractures). * Presence of systemic diseases or conditions that contraindicate general anesthesia or orthognathic surgery. * Presence of psychiatric disorders that may compromise treatment cooperation or the informed consent process.

What they're measuring

Three-Dimensional Skeletal and Soft Tissue Changes on Computed Tomography (CT)

Timeframe: Baseline (T0), 1 week post-surgery (T1), and 12 months post-surgery (T2)

Trial details

NCT IDNCT07433842

SponsorHanoi Medical University

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2026-03