Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
THREE-DIMENSIONAL IMPRESSION OF MODELS OF THE HUMAN MANDIBLE AND MANDIBULAR IMPLANTS
Submission Author:
Felipe Estevão da Silva , MS , Brazil
Co-Authors:
Felipe Estevão da Silva, André Crivellaro, André Boregio Madey, Rafael Gregolin, Bruno Fontoura da Silva Colman, Ruís Camargo Tokimatsu
Presenter: Felipe Estevão da Silva
doi://10.26678/ABCM.COBEM2023.COB2023-0137
Abstract
This paper shows how the technological advent of computational imaging tools and the use of computed tomography, combined with additive manufacturing, significantly influence cases of trauma in bone regions, with emphasis on mandibular trauma. It shows the difficulties encountered in the development and manufacture of a customized implant, due to the complexity of the bone geometry. This work seeks to manufacture in a 3D printer a model of the human mandible from a CT scan along with the development of a custom implant, showing the methodology of transforming DICOM files (CT scan) into a three-dimensional file of human mandibular geometry and then make simulations of stresses and strains of the region by applying conventional forces of human mastication. The goal is also to print the models of the mandible and the customized implant in order to perform a physical simulation of the coupling of the implant in the mandible. Thus, the visualization of a patient's CT scan was sought, using 3D imaging software in order to filter and edit the human mandibular image, making use of InVesalius, MeshLab, Rhino 6 and Meshmixer. In a second moment the work becomes practical, moving from the virtual model to the physical model, using the software Repetier-Host and the GTMAX 3D printer to build the model. During the virtual modeling, good projections of the mandible were obtained. The software used allowed for good image editing and remarkable work with them. The 3D printing was carried out effectively, and allowed the physical visualization of the models created. At the end of the study it was evident that it is possible to use additive manufacturing to develop customized implants, being an efficient and more attractive process, compared to conventional commercial prostheses, for doctors and patients by producing customized prostheses adapted to the geometry that will receive the implant. However, small dimensional differences between the created models and the geometry of the human skeleton were verified during the process. These differences may be inconsiderable, requiring further studies to confirm this thesis, or even be solved, if necessary, during surgery by the surgeon himself, minimally shaping the patient's bone structure to receive the implant. A second option would be the improvement of the implant geometry, refining the models and thus avoiding any incompatibility of the impression with the proportions of the person who will carry the prosthesis in the future.
Keywords
Additive manufacturing, 3D Imaging Software, Oral and Maxillofacial Implants
