How jaw surgery changes posture and foot pressure

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

Sixty adults will be enrolled, with 30 patients scheduled for single‑ or double‑jaw orthognathic surgery and 30 matched non‑surgical controls. Participants will have baseline measurements and the surgical group will be re‑measured at a 6‑month postoperative visit. Outcomes include static and dynamic plantar pressure (BEVER® and PAROMED® pedobarography), whole‑body posture analysis using the PostureScreen® mobile app, and lateral cephalometric radiographs; a physiotherapist will interpret pressure and posture results. Baseline and follow‑up values will be compared within the surgical group and against natural changes observed in the control group to determine direction and magnitude of change.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* Study Group (Orthognathic Surgery Group)

Participants will be eligible for inclusion in the surgical cohort if they meet all of the following criteria:

Individuals scheduled to undergo single-jaw or double-jaw orthognathic surgery as part of comprehensive orthodontic treatment.

Currently receiving orthodontic therapy utilizing clear aligner systems or fixed orthodontic appliances.

Availability of preoperative lateral cephalometric radiographs obtained as part of routine clinical evaluation.

Age ≥ 18 years at the time of enrollment.

Completion of a minimum of 6 months of postoperative orthodontic treatment, enabling standardized follow-up evaluation.

Body Mass Index (BMI) \< 30 kg/m², to minimize confounding effects related to obesity on postural and plantar pressure measurements.

Control Group (Non-surgical Group)

Participants will be eligible for inclusion in the control cohort if they meet all of the following criteria:

Individuals not undergoing orthognathic surgery during the study period.

Receiving orthodontic treatment with clear aligners or fixed appliances, comparable to the surgical cohort.

BMI \< 30 kg/m².

Age ≥ 18 years.

No participation in physical activities or rehabilitative programs that may alter postural parameters or plantar pressure distribution during the study period.

Exclusion Criteria:

* Participants from either cohort will be excluded if they exhibit:

Neuromuscular, musculoskeletal, or postural disorders that may independently influence balance or plantar pressure distribution.

History of previous orthognathic or maxillofacial surgery.

Systemic diseases affecting bone metabolism, neuromuscular function, or gait.

Pregnancy.

Inability or unwillingness to comply with study procedures or follow-up assessments.

Where it's running

• Bezmialem Vakif University Faculty of Dentistry, Department of Orthodontics
  Istanbul, Fatih, Turkey (Türkiye) Recruiting

Study contacts

• Principal investigator: Aysenur Di̇ndar — Bezmiâlem Vakıf University, Institute of Health Sciences, Department of Orthodontics, İstanbul, Türkiye
• Study coordinator: Aysenur Dindar, PhD student
• Email: aysenur.dindar@hotmail.com
• Phone: +90 5392881190

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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.