Aplicação das tecnologias CAD/CAE e de manufatura aditiva (MA) na avaliação de um sistema de retenção intramucoso utilizado em odontologia

Abstract

Dental prostheses are an alternative to generate an aesthetic or functional solution for lesions in the oral cavity. However, prostheses can be designed with errors or they can maladjust during their useful life, causing great damage to the patient's condition. Usually, the procedures used for dental prostheses are invasive which can cause injuries to the patient in the short or long term, so it is necessary to use less invasive procedures for the manufacture and fixation. In this study, a complete dental prosthesis was designed for edentulous patients by computed tomography images and using the Rhinoceros® software. Then, the additive manufacturing technology was used to obtain both prothesy's modeland oral cavity for surgical planning and fixing. In addition, a numerical analysis based on the finite elemento method was performed, in which forces of the intensity of 50 N, 100 N, 150 N and 200 N were applied and distributed in three diferente regions, in the whole buccal cavity, simultaneously in the left and right lateral and only in the right lateral, determining the highest concentration of von Mises tension in the mandible. These results were compared between three simulation conventional software (ANSYS®, SolidWorks®, and Inventor®) and the meshless software (SimSolid®). It showed similar behaviors in the highest concentration of tension regions. Regarding the tension values, the percentage error between each software was less than 10%. The use of SimSolid® software proved to be better to identify the higher tension generated by the dental prosthesis in the facial skeleton and considering its geometric complexity, the computational efficiency was highlighted.