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Effect of Proximal Segment Positioning on Postoperative Condylar Remodeling in Bimaxillary Orthognathic Surgery

NCT06897787 · Status: ENROLLING_BY_INVITATION · Phase: NA · Type: INTERVENTIONAL · Enrollment: 40

Last updated 2025-06-24

No results posted yet for this study

Summary

Bimaxillary orthognathic surgery is a surgical procedure that involves simultaneous corrections to both the maxilla (upper jaw) and mandible (lower jaw). This surgery is performed to correct facial and jaw deformities, improve occlusion, and enhance facial symmetry. The need for orthognathic surgery typically arises in cases where there is a significant discrepancy between the upper and lower jaws or severe malocclusion.

In bimaxillary orthognathic surgery, following mandibular osteotomies, the lower jaw is divided into two segments: the distal segment, which contains the teeth, and the proximal segment, which includes the condylar head. While the distal segment is positioned according to the ideal occlusion planned in collaboration with orthodontists using digital design, the management of the proximal segment varies among surgeons. Some surgeons leave the proximal segment in its original position without mobilization, whereas others reposition it through rotational movements.

This study aims to evaluate condylar remodeling by comparing these two surgical approaches in patients divided into two groups, assessing how each technique affects postoperative outcomes.

Conditions

  • Dentofacial Deformities
  • Dentofacial Anomalies [Including Malocclusion] and Other Disorders of Jaw (M26-M27)

Interventions

PROCEDURE

manuel positioning group

As Prof. Reyneke does, mandibular base and proximal segment leveling are performed first, followed by fixation.

PROCEDURE

mandibular basis osteotomy

After the mandibular sagittal split, secure the proximal segment in its preoperative position and remove the bone piece for leveling. After that, fixation is performed.

Sponsors & Collaborators

  • Bezmialem Vakif University

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
65 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2025-03-30
Primary Completion
2027-03-01
Completion
2027-04-30

Countries

  • Turkey (Türkiye)

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT06897787 on ClinicalTrials.gov