Metodologia de quantificação das translações de modelos tridimensionais de acordo com um sistema de coordenadas cartesiano

• Ano de defesa: 2018
• Autor(a) principal: Maués, Caroline Pelagio Raick
• Orientador(a): Quintão, Cátia Cardoso Abdo
• Banca de defesa: Capelli Júnior, Jonas , Ritto, Fabio Gambôa , Nojima, Lincoln Issamu
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade do Estado do Rio de Janeiro
• Programa de Pós-Graduação: Programa de Pós-Graduação em Odontologia
• Departamento: Centro Biomédico::Faculdade de Odontologia
• País: BR
• Palavras-chave em Português: Cirurgia ortognática; Imagem tridimensional; Validação de programas de computador
• Palavras-chave em Inglês: Orthognathic surgery; Imaging, three-dimensional; Software validation
• Área do conhecimento CNPq: CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA::ORTODONTIA
• Link de acesso: http://www.bdtd.uerj.br/handle/1/14089

This study proposes to validate a methodology of 3D superimposition in cone bean computed tomography (CBCT) that can be used for evaluation of displacements occurring in structures that do not change their anatomical shape. In the Dolphin Imaging® software, CBCT of 10 patients were used, in which randomly chosen surgical movements were performed according to the envelope of discrepancy of Proffit. The model of the regions of interest (maxilla and mandible) was also generated with ITK-SNAP® software, as it presents better surface quality than the models obtained with Dolphin Imaging®. The files were imported to Geomagic Qualify®, in which the models obtained in ITK-SNAP® were placed in the same spacial position than the models in the Dolphin Imaging®. Then, the evaluation of the movements was performed. For each structure (initial and simulated maxilla and initial and simulated mandible) a point (centroid) was created automatically by the software. Through the changes in coordinates X, Y e Z, in the centroid of simulated structures, relating them to the initial structures, it was possible to observe the occurred movements. It was also necessary to create a coordinate transfer model (CTM) which allows the evaluated structures to be in the same coordinate system. The normality of the sample was verified by the Shapiro-Wilk test. The methodology was performed by two evaluators and repeated after 15 days. The one-sample t-test showed no statistically significant difference in both the maxilla and the mandible for both evaluators. Intraclass correlation and the Altman-Bland showed excellent correlation and agreement, respectively. It can be concluded that the methodology used showed great precision and accuracy in determining quantitatively the displacements in the three axes of the space, of the evaluated structures, as well as excellent inter-examiner reliability