Quantitative Evaluation of Attention to Faces After Orthognathic Surgery With Eye-tracking

Not Applicable

Recruiting

• Conditions: Social Perception; Dentofacial Deformities; Orthognathic Surgery; Eye Tracking

• Registration Number: NCT06494709
• Lead Sponsor: Centre Hospitalier Universitaire, Amiens

Brief Summary

Dentofacial deformities refer to morphological anomalies of the jaws. Their development during growth determines the shape of the lower third of the face and the type of dental occlusion. A maxillo-mandibular dysmorphosis associates morphological modification of the face and anomaly of the occlusion. If these anomalies are most often hereditary, they also depend on acquired factors such as swallowing, breathing, sucking or phonation disorders. Angle's classification defines three classes of dental occlusion: class I, when the ratio between the maxillary and mandibular first molars is normal, class II when the upper molar is too far forward, and class III when it is too far back. Class II and III dysmorphoses can result in an alteration of the masticatory function, pain (TMJ, headaches) or sleep apnea. At the same time, they cause patients to experience a decrease in self-esteem, anxiety and social discomfort. Class II and II usually require orthodontic treatment and orthognathic surgery to correctly align the jaws. This surgery has a positive impact on the dental occlusion and the functions concerned, but also on the facial morphology, all of which often leads to an improvement in the patient's quality of life.

Standardized photographs presenting control subjects (class I) and patients (class II and class III) before and after surgery will be included in an approximately 10 min video sequence. Naive participants will look at this sequence during which the faces of the controls and the patients - before and after surgery - will alternate, with the instruction being free visual exploration of the images. The total fixation durations in defined areas of interest (eyes, nose, mouth, chin) will be recorded with an eye tracking device and the results will be processed using a dedicated software.

Detailed Description

Not available

Study Timeline

• Status Verified: 2024-07
• Study Start: 2024-07-02
• Study First Submitted: 2024-07-02
• Study First Submitted QC: 2024-07-02
• Study First Posted: 2024-07-10
• Last Update Submitted: 2024-07-10
• Last Update Posted: 2024-07-11
• Primary Completion: 2026-07
• Study Completion: 2026-08

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 60

Inclusion Criteria

• Naïve subject with regard to dentofacial deformities and their management
• Subject with no known facial pathology
• Subject having provided an informed consent
• Subject > 18 years old

Exclusion Criteria

• Subject familiar with dentofacial deformities and their management (e.g., health professionals in the relevant specialties)
• Subject with known facial pathology (dentofacial deformity or other)
• Subject under guardianship, curators or justice protection

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Primary Outcome Measures

Name	Time	Method
Total fixation duration in the "lower third of the face (mouth/chin)" area of interest	one day	Total fixation duration in the "lower third of the face (mouth/chin)" area of interest, measured in seconds with eye-tracking technique

Secondary Outcome Measures

Name	Time	Method
Total fixation duration in the eyes", the "nose" and the "lower third of the face (mouth/chin)" areas of interest in class II patients before orthognathic surgery compared to class III patients.	one day	Total fixation duration in the eyes", the "nose" and the "lower third of the face (mouth/chin)" areas of interest in in class II patients before orthognathic surgery compared to class III patients.; measured in seconds with eye-tracking technique
Total fixation duration in the "nose"" area of interest	one day	Total fixation duration in the "nose" area of interest, measured in seconds with eye-tracking technique
Total fixation duration in the "eyes" area of interest	one day	Total fixation duration in the "eyes" area of interest, measured in seconds with eye-tracking technique
Total fixation duration in the eyes", the "nose" and the "lower third of the face (mouth/chin)" areas of interest in patients before orthognathic surgery compared to control subjects.	one day	Total fixation duration in the eyes", the "nose" and the "lower third of the face (mouth/chin)" areas of interest in patients before orthognathic surgery compared to control subjects.; measured in seconds with eye-tracking technique
Total fixation duration in the eyes", the "nose" and the "lower third of the face (mouth/chin)" areas of interest in patients after orthognathic surgery compared to control subjects.	one day	Total fixation duration in the eyes", the "nose" and the "lower third of the face (mouth/chin)" areas of interest in patients after orthognathic surgery compared to control subjects.; measured in seconds with eye-tracking technique

Trial Locations

Locations (1)

Amiens University Hospital; 🇫🇷 Amiens, Picardie, France