Author(s): Monteiro, Miguel ; Vale, Francisco ; Ferreira, Nuno C. ; Marques, Filipa ; Ribeiro, Madalena Prata ; Santos, Mariana ; Oliveira, Catarina ; McEvoy, Mariana ; Travassos, Raquel ; Nunes, Catarina ; Paula, Anabela Baptista ; Francisco, Inês ; Caramelo, Francisco
Date: 2023
Persistent ID: https://hdl.handle.net/10316/114885
Origin: Estudo Geral - Universidade de Coimbra
Subject(s): orthodontics; orthognathic surgery; imaging; three-dimensional; virtual planning
Orthognathic surgery is a procedure used to correct intermaxillary discrepancies, thus promoting significant improvements in chewing and breathing. During the surgical planning stage, orthodontists often use two-dimensional imaging techniques. The assessment is based on CBCT images and dental cast models to overcome these limitations; however, the evaluation of soft tissues remains complex. The aim of the present study was to develop a co-registration method of CBCT and photo images that would result in realistic facial image reconstruction. CBCT images were three-dimensionally rendered, and the soft tissues were subsequently segmented resulting in the cranial external surface. A co-registration between the obtained surface and a frontal photo of the subject was then carried out. From this mapping, a photorealistic model capable of replicating the features of the face was generated. To assess the quality of this procedure, seven orthodontists were asked to fill in a survey on the models obtained. The survey results showed that orthodontists consider the three-dimensional model obtained to be realistic and of high quality. This process can automatically obtain a three-dimensional model from CBCT images, which in turn may enhance the predictability of surgical-orthognathic planning.
