Clinical trial NCT06822127: Simulation of Facial Soft Tissue in Orthognathic Surgery
Official title: Simulation of Facial Soft Tissue in Orthognathic Surgery
Study type: INTERVENTIONAL
Overall status: NOT_YET_RECRUITING
Phase: NA
Conditions: Orthognathic Surgery
Lead sponsor: Centre Hospitalier Annecy Genevois
Sponsor class: OTHER
Collaborators: name: University Grenoble Alps
First posted: 2025-02-12
Enrollment: 30
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Intervention model description: A non-controlled, non-randomised interventional cohort study of patients undergoing planned orthognathic surgery, designed to evaluate the simulation of changes to the soft parts of the face during surgery, using the SPOC simulation model.
Primary purpose: OTHER

Brief summary: Orthognathic surgery consists of rebalancing the position of the jaws, taking into account functional criteria (tooth engagement, tooth/lip ratio, breathing, etc.) and aesthetic criteria. It has become much more accurate in recent years thanks to the advent of osteosynthesis plates and the contribution of three-dimensional imaging. Three-dimensional imaging makes it possible to simulate fairly accurately the surgical procedures and bone displacements required. However, the effect of these bone displacements on the soft tissues (skin, subcutaneous tissue, muscles) does not make it possible, with today's digital tools, to simulate the final aesthetic result and in particular to anticipate the sometimes significant postoperative changes to the face. Many patients are worried about these post-operative morphological changes and would like to have a precise idea of how they will look after surgery. Being able to offer them, before surgery, a visual solution simulating the final aesthetic appearance would be essential in this respect.

The aim of the study is to validate the predictions provided by the digital face model on a series of patients scheduled for orthognathic surgery by comparing the simulation of the morphological result of the operation, provided by our algorithm (SPOC), with the actual result assessed on a scan taken 6 months after the operation.


Eligibility criteria: Inclusion Criteria:

* Patient over 18 ;
* Patients who have been informed of the study and who have freely given their informed consent to participate in the study;
* Patient undergoing isolated mandibular or maxillary orthognathic surgery, or maxillo-mandibular surgery with or without genioplasty for any indication (occlusal disorder, sleep apnoea syndrome, functional joint disorder, etc.);
* Patient covered by a French social security scheme

Exclusion Criteria:

* Patient with maxillary disjunction ;
* Patients with facial malformations;
* Pregnant or breast-feeding patient;
* Patient under guardianship;
* Patients who do not understand French;
* Patients under court protection
* No pre- or postoperative CT scan or CT scan that cannot be used
* Surgery, trauma, progressive infection or cosmetic injection on the face after orthognathic surgery and before the postoperative scan

Primary outcomes:
measure: Validation of the predictions provided by the digital face model (SPOC).
timeFrame: 6 months after orthganthic surgery
Secondary outcomes:
Other outcomes:
Locations:
Study officials:
affiliation: Centre Hospitalier Annecy Genevois
name: Georges BETTEGA
role: PRINCIPAL_INVESTIGATOR
References: