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New study measures how well Surgery-First fixes jaw problems

NCT ID NCT07433842

Knowledge-focused Sponsor: Hanoi Medical University Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at a treatment called "Surgery-First" for people with a severe underbite (skeletal Class III malocclusion). Instead of wearing braces before surgery, patients had jaw surgery first to fix the bone problem, then braces afterward. Researchers studied 60 patients using CT scans and digital dental models to see how the bones and face changed right after surgery and one year later. The goal was to understand how well this approach works and how stable the results are over time.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

60 people

The number who actually took part.

Started

Mar 2022

Finished

May 2026

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

16 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

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.

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Conditions

The condition(s) this trial relates to.

autosomal dominant prognathism

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Skeletal class III malocclusion

Contacts and locations

Locations

  • Hanoi Medical University Hospital

    Hanoi, Hanoi, 10000, Vietnam

More trials for these conditions

Other studies related to the condition(s) this trial covers.