Effect of Orthognathic Surgery on Plantar Pressure and Posture

NCT07350681 | Recruiting

• 2 other identifiers: E.21167820240605E
• Study Type: interventional
• Target: 60
• Locations: 1 country
• Sites: 1

Brief Summary

Orthognathic surgery leads to changes in the three-dimensional position of the jaws, which may result in alterations in head and neck posture as well as overall body posture. These postural changes are also expected to influence plantar pressure distribution. This study aims to evaluate the direction and magnitude of these changes by assessing posture and plantar pressure measurements before and after orthognathic surgery. Postural analysis and plantar pressure measurements will be performed preoperatively and at the 6-month postoperative follow-up in patients undergoing orthognathic surgery. In order to allow a reliable comparison, a control group consisting of non-operated individuals will also be included. The range of natural changes observed in the control group will be determined, and the outcomes will be compared between the surgical and control groups. By comparing preoperative and postoperative measurements, this study aims to evaluate the effects of orthognathic surgery on body posture and plantar pressure distribution. The findings are expected to contribute to the identification of parameters that should be considered in postoperative evaluation and rehabilitation. Furthermore, the results will provide valuable information regarding the postural and plantar pressure changes observed in patients following orthognathic surgery.

Conditions

Postural Balance; Orthognathic Surgery

Outcome Measures

Primary Outcomes (1)

• Change in Plantar Pressure Distribution

  Plantar pressure distribution will be evaluated using static and dynamic pedobarographic measurements. Peak plantar pressure, pressure distribution patterns, and contact area will be recorded preoperatively and at 6 months postoperatively to assess changes in plantar loading following orthognathic surgery.

  Baseline and 6 months postoperative

Secondary Outcomes (2)

• Change in Whole-Body Postural Alignment Measured by PostureScreen® Mobile Application at Baseline and 6 Months Postoperative

  Preoperative baseline and 6 months postoperative

• Change in Cranio-Cervical Posture Measured by Lateral Cephalometric Analysis at Baseline and 6 Months Postoperative

  Baseline & 6 months postoperative

Study Arms (2)

Orthognathic Surgery Group

EXPERIMENTAL

Patients undergoing orthognathic surgery with postoperative orthodontic treatment

Procedure: Orthognathic Surgery

Control Group

NO INTERVENTION

Control group subjects not undergoing orthognathic surgery

Interventions

Orthognathic Surgery PROCEDURE

Participants in the experimental group will undergo orthognathic surgery

Orthognathic Surgery Group

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Study Group (Orthognathic Surgery Group)
• 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)
• 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.

You may not qualify if:

• 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.

Sponsors & Collaborators

• Ayşenur Dindar: lead

Study Sites (1)

Bezmialem Vakif University Faculty of Dentistry, Department of Orthodontics

Istanbul, Fatih, 34093, Turkey (Türkiye)

RECRUITING

MeSH Terms

Interventions

Orthognathic Surgery

Intervention Hierarchy (Ancestors)

Surgery, Oral; Dentistry

Study Officials

• AYSENUR DİNDAR

  Bezmiâlem Vakıf University, Institute of Health Sciences, Department of Orthodontics, İstanbul, Türkiye

  PRINCIPAL INVESTIGATOR

Central Study Contacts

Aysenur Dindar, PhD student

CONTACT

+90 5392881190; aysenur.dindar@hotmail.com

Şerife Şahin, Assistant Professor

CONTACT

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NON RANDOMIZED
• Masking: NONE
• Purpose: OTHER
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: SPONSOR INVESTIGATOR
• PI Title: Ayşenur Dindar, DDS, PhD in Orthodontics, Department of Orthodontics

Study Record Dates

• First Submitted: December 14, 2025
• First Posted: January 20, 2026
• Study Start: September 29, 2025
• Primary Completion: April 1, 2026
• Study Completion: May 1, 2026
• Last Updated: January 20, 2026

Record last verified: 2026-01

Data Sharing

• IPD Sharing: Will not share

Locations

TU (1)