Evaluation of the Effects of Orthognathic Surgeries on the Temporomandibular Joint Using a Mandibular Movement Analyzer Device

September 14, 2026 updated by: Semmelweis University
Condylar position and mandibular motion assessment with digital facebows Arcus Digma III before and after orthognathic surgery.

Study Overview

Status

Recruiting

Conditions

Study Type

Observational

Enrollment (Estimated)

50

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

  • Hungary
      • Budapest, Hungary, 1088
        • Recruiting
        • Semmelweis University Department of Paediatric Dentistry and Orthodontics
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

The study population consists of adult male and female patients diagnosed with skeletal dentofacial deformities who are referred to and treated at the Department of Pediatric Dentistry and Orthodontics in collaboration with the Department of Oro-Maxillofacial Surgery and Stomatology at Semmelweis University (Budapest, Hungary). Eligible participants are consecutive patients undergoing combined orthodontic and orthognathic surgical treatment who fulfill the predefined inclusion criteria and agree to participate in the prospective functional evaluation of the temporomandibular joint and mandibular kinematics.

Description

Inclusion Criteria:

Age between 18 and 45 years (skeletally mature patients). Severe dentofacial deformity requiring combined orthodontic and orthognathic surgical treatment (e.g., Le Fort I osteotomy, bilateral sagittal split osteotomy, or bimaxillary procedure).

Presurgical orthodontic preparation completed or near completion. Signed written informed consent prior to study enrollment. Ability and willingness to attend all scheduled preoperative and postoperative follow-up visits.

Exclusion Criteria:

History of previous orthognathic or major craniofacial surgical interventions. Congenital craniofacial anomalies, cleft lip and/or palate, or genetic syndromes affecting the musculoskeletal or facial skeleton.

Pre-existing severe degenerative temporomandibular joint disease (e.g., advanced osteoarthritis, idiopathic condylar resorption, or ankylosis).

Systemic rheumatologic, autoimmune, or connective tissue disorders affecting bone and joint metabolism (e.g., rheumatoid arthritis, lupus).

Active neurological or neuromuscular disorders affecting jaw movement or motor control.

Current use of medications significantly altering bone metabolism or neuromuscular function (e.g., chronic systemic corticosteroids, antiresorptive agents).

Severe unmanaged bruxism or acute trauma to the maxillofacial region

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Orthognathic Surgery Cohort
Adult patients diagnosed with dentofacial deformities undergoing combined orthodontic and orthognathic surgical treatment (e.g., bilateral sagittal split osteotomy, Le Fort I osteotomy, or bimaxillary surgery). Participants undergo preoperative and postoperative clinical and functional assessments of the temporomandibular joint (TMJ), including mandibular motion, condylar position analysis, and evaluation of temporomandibular signs and symptoms.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Change in Three-Dimensional Condylar Displacement
Time Frame: Baseline (preoperative, within 4 weeks prior to surgery) and at 6 months postoperatively
Baseline (preoperative, within 4 weeks prior to surgery) and at 6 months postoperatively
Change in Mandibular Maximum Range of Motion
Time Frame: Baseline (preoperative, within 4 weeks prior to surgery) and at 6 months postoperatively
Baseline (preoperative, within 4 weeks prior to surgery) and at 6 months postoperatively

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Semmelweis University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

September 18, 2024

Primary Completion (Estimated)

December 31, 2027

Study Completion (Estimated)

December 31, 2027

Study Registration Dates

First Submitted

September 14, 2026

First Submitted That Met QC Criteria

September 14, 2026

First Posted (Actual)

September 18, 2026

Study Record Updates

Last Update Posted (Actual)

September 18, 2026

Last Update Submitted That Met QC Criteria

September 14, 2026

Last Verified

June 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • SE RKEB 249/2024/TMI

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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