Detalhes bibliográficos
| Ano de defesa: |
2013 |
| Autor(a) principal: |
Sousa, Thiago Oliveira
 |
| Orientador(a): |
Mendonça, Elismauro Francisco de
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| Banca de defesa: |
Mendonça, Elismauro Francisco de,
Silva, Maria Alves Garcia Santos,
Botelho, Tessa de Lucena,
Silva, Fernanda Paula Yamamoto,
Silva, Rhonan Ferreira da |
| Tipo de documento: |
Dissertação
|
| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal de Goiás
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| Programa de Pós-Graduação: |
Programa de Pós-graduação em Odontologia (FO)
|
| Departamento: |
Faculdade de Odontologia - FO (RG)
|
| País: |
Brasil
|
| Palavras-chave em Português: |
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| Palavras-chave em Inglês: |
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| Área do conhecimento CNPq: |
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| Link de acesso: |
http://repositorio.bc.ufg.br/tede/handle/tede/5621
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Resumo: |
Objectives: The aim of this study was to investigate the application of the digital subtraction technique in cone beam computed tomography (CBCT) images and compare it with digital subtraction radiography of the same regions. Methods: Digital periapical radiographic and CBCT examinations were performed giving standardized images from 16 alveolar sockets of a dry mandible. Bone substitute was added within 4 alveolar sockets in different concentrations, new acquisitions were obtained and the final images subtracted from the baseline. Mineral density loss was brought about in the remaining 12 alveolar sockets by using 70% perchloric acid and the acquisition were performed at 4 different times (0h, 2h, 4h and 24h). Pixel values were attained from both induced mineral changes and involved gain and loss. Results: A gradual increase in pixel values (over 128) was observed in mineral gain induction. Bone loss was set by the mean and standard deviation of the pixel values and a gradual decrease (below 128) was shown in both periapical and CBCT examinations and throughout the follow up acquisitions. Conclusions: The results indicate that CBCT images, which provide a three-dimensional follow up during bone repair, can be used in the subtraction technique |
