Detalhes bibliográficos
Ano de defesa: |
2020 |
Autor(a) principal: |
Sousa, Vinícius Caixeta de
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Orientador(a): |
Alencar, Ana Helena Gonçalves de
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Banca de defesa: |
Estrela, Carlos,
Guedes, Orlando Aguirre,
Decurcio, Daniel de Almeida,
Porto, Olavo Lyra,
Barletta, Fernando Branco |
Tipo de documento: |
Tese
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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 Ciências da Saúde (FM)
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Departamento: |
Faculdade de Medicina - FM (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/11309
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Resumo: |
This study measured the thickness of cementum/dentin in the danger zone of mandibular molars after root canals preparation (RCP) using a novel cone-beam computed tomography (CBCT) software. Material and methods: Eighty-four teeth were distributed into four groups: G1. ProTaper Next; G2. BioRace; G3. Reciproc Blue; G4. WaveOne Gold. CBCT images were acquired before and after RCP. The e-Vol DX® CBCT software was used to measure initial and final remaining cementum-dentin thickness after RCP of the mesial root of mandibular molars at 1 and 3 mm from the furcation. The Kolmogorov Smirnov test, analysis of variance and Student t test were used to statistical analysis. The level of significance was set at 5%. Results: Differences between mean initial and final thicknesses of the mesiobuccal (MB) and mesiolingual (ML) canals were not statistically significant. Lower mean initial thickness at 3 mm (0.900mm ± 0.191) than at 1 mm (1.035mm ± 0.184) indicates that this is the danger zone. Although cementum/dentin is thinner at 3 mm from the furcation (0.715 ± 0.186) after RCP, the greatest amount of dentin removal was found at 1 mm (0.734 ± 0.191). Conclusions: Remaining cementum dentin was thicker than 0.715 mm in root canals prepared using #35 (WaveOne Gold®) and #40 (ProTaper Next®, BioRace® and Reciproc Blue®) instruments, which confirms the safety of canal preparation in the danger zone. |