Avaliação da precisão de diferentes protocolos de aquisição de TCFC usados em modelos de prototipagem rápida

Autores

DOI:

https://doi.org/10.33448/rsd-v9i11.9842

Palavras-chave:

Prototipagem rápida; Tomógrafo computadorizado de feixe cônico; Tamanho do voxel; Simulação de tecido mole.

Resumo

Este estudo comparou os protocolos de aquisição do sistema de Tomografia Computadorizada de Feixe Cônico (TCFC), para avaliar a influência na precisão da imagem por diferentes tamanhos de voxel e presença de tecido mole. A aquisição tomográfica foi realizada em mandíbula de porco nos estados fresco (F) e seco (D) com tamanhos de voxels de 0,4, 0,3 e 0,25 mm. O padrão ouro foi obtido pela varredura de mandíbula seca coberta com sulfato de bário com tamanho de voxel de 0,25 mm. As imagens foram tratadas no programa MIMICS®, e áreas de ruído foram removidas manualmente, utilizando limiar fixo para fins de geração de janelas de impressão 3D. Cada janela foi sobreposta virtualmente ao padrão ouro por meio do software MeshLab, obtendo-se valores de erros absolutos entre as malhas, gerando um mapa de discrepâncias. Foram encontradas diferenças significativas entre as janelas D 0,30 vs. F 0,30, D 0,30 vs. F 0,25, D 0,30 vs. D 0,25, D 0,30 vs. F 0,40, F 0,30 vs. D 0,25, F 0,25 vs. D 0,25, F 0,25 vs. D 0,40, D 0,25 vs. F 0,40, D 0,25 vs. D 0,40 e F 0,40 vs. D 0,40, (p <0,05). Observou-se que as janelas de mandíbula seca apresentaram menor média e desvio padrão dos quando comparadas às janelas de mandíbula frescas. O protocolo com voxel de 0,25 mm apresentou o resultado mais acurado e a presença de tecidos moles influenciou na acurácia da imagem quando alguns protocolos foram comparados estatisticamente.

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13/11/2020

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CORAZZA, P. F. L. .; BAEDER, F. M. .; SILVA, D. F.; ALBUQUERQUE, A. C. L. de; SILVA, J. V. L. .; JUNQUEIRA, J. L. C.; PANZARELLA, F. K. Avaliação da precisão de diferentes protocolos de aquisição de TCFC usados em modelos de prototipagem rápida. Research, Society and Development, [S. l.], v. 9, n. 11, p. e2649119842, 2020. DOI: 10.33448/rsd-v9i11.9842. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/9842. Acesso em: 30 jun. 2024.

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