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Which jaw surgery cut keeps the jaw in place longer?

NCT ID NCT07788976

Disease control Sponsor: Bezmialem Vakif University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Aug 27, 2026 · Last updated Aug 28, 2026 · Updated 1 time

Summary

This trial compares two ways of cutting the lower jaw during orthognathic surgery, called the Hunsuck and Posnick modifications. The goal is to see which technique keeps the jaw more stable and reduces the chance of it shifting back over the year after surgery. Adults aged 18 to 65 who need bimaxillary jaw surgery and have had orthodontic treatment can take part. Researchers will measure jaw position with 3D imaging at one month and twelve months after surgery to track any relapse.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Two surgical techniques for jaw repositioning: the Hunsuck modification and the Posnick modification of the medial osteotomy, performed during sagittal split osteotomy as part of orthognathic surgery.
What this could lead to
If one technique proves more stable, it could reduce the need for repeat jaw surgery and improve long-term outcomes for people undergoing orthognathic procedures.
What could go wrong
This is a small, early-stage comparison, and results may not apply to all patients. Surgical outcomes also depend on individual healing and surgeon skill, so the technique alone may not determine stability.

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

About 34 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jan 2026

Expected to finish

Apr 2027

An estimate. End dates often move.

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

18 to 65 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: 1. Patients with an indication for orthognathic surgery who are planned to undergo bimaxillary orthognathic surgery. 2. Patients who have undergone preoperative orthodontic treatment. 3. Patients aged 18-65 years. Exclusion Criteria: 1. Patients who develop an unfavorable split (bad split) during surgery. 2. Patients with cleft lip and palate, craniofacial syndromes, or a history of facial trauma. 3. Patients who have previously undergone orthognathic surgery and require revision surgery. 4. Patients whose computed tomography (CT) records are inadequate for the required measurements.

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Conditions

The condition(s) this trial relates to.

Recurrence

As listed by the trial registrant

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

Orthognathic surgical procedures

How to take part

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  1. The places running it

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  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

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Contacts and locations

Locations

  • Bezmialem vakif university

    RECRUITING

    Istanbul, Fatih, 34093, Turkey (Türkiye)

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