Modeling and Simulation of an Orthodontic System of a Real Patient Starting from CBCT Images Dragos-Laurentiu Popa 1(B ) , Ionela Teodora Dascalu 2 , Daniela Tarnita 1 , Alina Duta 1 , Gabriel Buciu 3 , Ludmila Sass 1 , Daniela Vintila 1 , and Stelian-Mihai-Sever Petrescu 2 1 Faculty of Mechanics, University of Craiova, 200512 Craiova, Romania dragos.popa@edu.ucv.ro 2 Faculty of Dentistry, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania 3 Faculty of Health Care, Titu Maiorescu University, 210102 Targu Jiu, Romania Abstract. The paper first presented the stages of obtaining a virtual model of a female patient, aged 13 years and who had multiple dental malpositions. The patient underwent a CT scan, and CT images were initially processed using the InVesalius program and three-dimensional geometries were obtained, both for the mandible and jaw, but also for the dental structure. These primary geometries were processed, edited and transformed using Reverse Engineering techniques in the Geomagic program. Dental alveoli were obtained in SolidWorks using CAD methods and techniques. Bracket elements and orthodontic wires were also gen- erated in SolidWorks. Interference solids have been removed by various processes so that the model is geometrically accurate. Finally, these structures formed of virtual solids recomposed the orthodontic system of the analyzed patient. The custom model was exported to Ansys, where it was analyzed and result maps were obtained. Finally, interesting conclusions and some clinical observations were highlighted. Keywords: Computer Aided Design · Orthodontic System · Finite Elements Method 1 Introduction Malocclusions represent imbalances in the processes of formation and growth of the stomatognathic system. They have a growing prevalence from one generation to the next as a result of climate change, soil, air and water pollution, with unfavorable consequences for the nutritional pattern. Thus, diet along with other etiopathogenic factors contribute to increasingly complex changes in the somatic development of the whole body and, implicitly, of the cephalic extremity. The standards of dento-facial aesthetics have been a standard in the evaluation of the harmony of the human body since antiquity. The first attempts to correct malocclusions © The Author(s) 2023 I. Dumitru et al. (Eds.): ICOME 2022, AHE 15, pp. 70–79, 2023. https://doi.org/10.2991/978-94-6463-152-4_9