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Mandibular Medial Osteotomy Modifications and Postoperative Stability

24 augustus 2026 bijgewerkt door: Bezmialem Vakif University

The Effect of Mandibular Medial Osteotomy Modifications on Postoperative Stability Following Orthognathic Surgery

This study aims to compare the effects of the Hunsuck and Posnick modifications of medial mandibular osteotomy on postoperative skeletal stability and relapse in patients undergoing orthognathic surgery. The study will evaluate whether the choice of medial osteotomy technique influences postoperative mandibular relapse.

Studie Overzicht

Toestand

Werving

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

This study aims to evaluate and compare the effects of two different medial mandibular osteotomy modifications, namely the Hunsuck and Posnick techniques, on postoperative skeletal stability and relapse in patients undergoing orthognathic surgery.

Patients who meet the study eligibility criteria and are scheduled to undergo bilateral sagittal split ramus osteotomy (BSSO) as part of orthognathic surgery will be included. Depending on the medial mandibular osteotomy technique used, patients will be evaluated in two groups: those undergoing the Hunsuck modification and those undergoing the Posnick modification.

Preoperative and postoperative radiographic records will be evaluated to assess skeletal changes associated with each osteotomy technique. Postoperative skeletal stability will be assessed by comparing relevant mandibular and skeletal reference points and angular measurements between the preoperative, immediate postoperative, and follow-up imaging records. The amount and direction of postoperative skeletal relapse will be determined based on changes occurring during the follow-up period.

The primary objective is to determine whether the Hunsuck and Posnick modifications differ in terms of postoperative skeletal stability and relapse following orthognathic surgery. Secondary evaluations may include assessment of the magnitude and direction of mandibular positional changes and comparison of the radiographic outcomes between the two techniques.

The findings of this study may provide clinically relevant information regarding the influence of medial mandibular osteotomy design on postoperative skeletal stability and may help guide the selection of an appropriate osteotomy technique in orthognathic surgery.

Studietype

Ingrijpend

Inschrijving (Geschat)

34

Fase

  • Niet toepasbaar

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

Studie Locaties

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

  • Volwassen
  • Oudere volwassene

Accepteert gezonde vrijwilligers

Ja

Beschrijving

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.

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Behandeling
  • Toewijzing: Gerandomiseerd
  • Interventioneel model: Parallelle opdracht
  • Masker: Enkel

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: Hunsuck Modification Group
Patients undergoing orthognathic surgery with bilateral sagittal split ramus osteotomy (BSSO) will undergo medial mandibular osteotomy using the Hunsuck modification. The osteotomy will be performed according to the Hunsuck technique, with the medial horizontal osteotomy terminating at the level of the lingula and extending posteriorly to facilitate the sagittal split. Postoperative skeletal stability and relapse will be evaluated during the follow-up period.
Procedure: sagittal split osteotomy
Bilateral sagittal split ramus osteotomy will be performed as part of orthognathic surgery to correct the planned mandibular skeletal deformity. The mandibular ramus and body will be divided using the assigned medial osteotomy modification (Hunsuck or Posnick), followed by sagittal splitting of the mandible. The distal mandibular segment will then be repositioned according to the preoperative surgical plan and stabilized using appropriate osteosynthesis. Postoperative skeletal stability and mandibular relapse will be evaluated during the follow-up period.
Procedure: Hunsuck Modification of Medial Mandibular Osteotomy
The Hunsuck modification of the medial mandibular osteotomy will be performed during bilateral sagittal split ramus osteotomy (BSSO). The medial horizontal osteotomy will be initiated at the lingula and extended posteriorly for a short distance, according to the Hunsuck modification. The remaining steps of the BSSO will be performed using the standard surgical technique. Postoperative skeletal stability and relapse will be assessed using preoperative, immediate postoperative, and follow-up radiographic evaluations
Actieve vergelijker: Posnick Modification Group
Patients undergoing orthognathic surgery with bilateral sagittal split ramus osteotomy (BSSO) will undergo medial mandibular osteotomy using the Posnick modification. The osteotomy will be performed according to the Posnick technique, with the modified medial osteotomy design extending posteriorly in accordance with the technique. Postoperative skeletal stability and relapse will be evaluated during the follow-up period.
Procedure: sagittal split osteotomy
Bilateral sagittal split ramus osteotomy will be performed as part of orthognathic surgery to correct the planned mandibular skeletal deformity. The mandibular ramus and body will be divided using the assigned medial osteotomy modification (Hunsuck or Posnick), followed by sagittal splitting of the mandible. The distal mandibular segment will then be repositioned according to the preoperative surgical plan and stabilized using appropriate osteosynthesis. Postoperative skeletal stability and mandibular relapse will be evaluated during the follow-up period.
Procedure: Posnick Modification Group
The Posnick modification of the medial mandibular osteotomy will be performed during bilateral sagittal split ramus osteotomy (BSSO). The medial horizontal osteotomy will be performed according to the Posnick modification, with the osteotomy design extending posteriorly along the medial aspect of the mandibular ramus as described for this technique. The remaining steps of the BSSO will be performed using the standard surgical technique. Postoperative skeletal stability and relapse will be assessed using preoperative, immediate postoperative, and follow-up radiographic evaluations.

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Postoperative Skeletal Relapse
Tijdsspanne: 1 year
The primary outcome will be the amount and percentage of skeletal relapse between 1 month and 12 months after orthognathic surgery (T3-T1), assessed using three-dimensional cephalometric and skeletal measurements.
1 year

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Bezmialem Vakif University

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Werkelijk)

1 januari 2026

Primaire voltooiing (Geschat)

28 december 2026

Studie voltooiing (Geschat)

25 april 2027

Studieregistratiedata

Eerst ingediend

24 augustus 2026

Eerst ingediend dat voldeed aan de QC-criteria

24 augustus 2026

Eerst geplaatst (Werkelijk)

27 augustus 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

27 augustus 2026

Laatste update ingediend die voldeed aan QC-criteria

24 augustus 2026

Laatst geverifieerd

1 augustus 2026

Meer informatie

Termen gerelateerd aan deze studie

Trefwoorden

Aanvullende relevante MeSH-voorwaarden

Andere studie-ID-nummers

  • E.224971

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

NEE

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

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