Hunsuck vs Posnick Medial Mandibular Osteotomy Modifications and Postoperative Stability

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This interventional study compares two medial mandibular osteotomy techniques, the Hunsuck modification and the Posnick modification, in patients undergoing bilateral sagittal split ramus osteotomy as part of orthognathic surgery. Participants are grouped by the technique used and will have preoperative, immediate postoperative, and follow‑up radiographs reviewed to measure skeletal changes and relapse. The primary goal is to see if the two techniques differ in postoperative stability and relapse, with secondary analyses describing patterns of mandibular position changes. Eligibility includes adults 18–65 undergoing planned bimaxillary surgery after prior orthodontic treatment, while excluding cases with bad splits, cleft/lip palate, craniofacial syndromes, prior orthognathic surgery, or inadequate CT records. The study is led by Bezmialem Vakif University in Istanbul and involves sagittal split osteotomy with either the Hunsuck or Posnick modification.

Why it matters

Who can join: the full rules

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.

Where it's running

• Bezmialem vakif university
  Istanbul, Fatih, Turkey (Türkiye) Recruiting

Study contacts

• Study coordinator: Emine Fulya Akkoyun, Dr.
• Email: efulyaakkoyun@hotmail.com
• Phone: +905372676871

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How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.