Detalhes bibliográficos
Ano de defesa: |
2015 |
Autor(a) principal: |
Rabelo, Luiz Eduardo Gregoris
 |
Orientador(a): |
Estrela, Carlos
 |
Banca de defesa: |
Estrela, Carlos,
Pécora, Jesus Djaalma,
Souza, João Batista,
Alencar, Ana Helena de |
Tipo de documento: |
Dissertação
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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)
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Departamento: |
Faculdade de Odontologia - FO (RG)
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País: |
Brasil
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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/9864
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Resumo: |
This study determined the frequency of root isthmuses (RI) in human permanent teeth using map-reading dynamics and cone beam computed tomography (CBCT) images. A sample of 1,400 teeth was selected from CBCT scans of 618 patients (394 women; 43.4 mean age-years). RI were detected longitudinally using map-reading dynamics on axial images by CBCT using slices with a 0,1 mm thick, from the pulp orifice to the root apex, and findings were recorded into seven categories: 1. beginning and end in cervical third; 2. beginning in cervical third and end in middle third; 3. beginning in cervical third and end in apical third; 4. beginning and end in middle third; 5. begin in middle third and end in apical third; 6. beginning and end in apical third; 7. no isthmus. The categorical variables, described as frequencies (%), were analyzed using a chi-square test (2) with Yates correction or the Fisher's exact test. Quantitative variables were compared using the Student t test for independent samples. RI is an anatomic structure of common occurrence in human permanent teeth, except in maxillary anterior teeth. The higher frequencies of root isthmus (87.9%) in human permanent teeth were found in mandibular first molars. The frequency of RI according to gender was not significantly different (p>0.05), except in mandibular central incisors. RI was less frequent among older patients. The higher frequency of four root canals (76%) and four apical foramina (33%) was found in maxillary first molars. |