Influence of voxel size on dentinal microcrack detection by micro-CT after root canal preparation
Abstract The aim of this study was to assess the influence of micro-computed tomography (micro-CT) voxel size on dentinal microcrack detection after root canal preparation using rotary heat-treated nickel-titanium files. Curved mesial root canals (n = 24) of mandibular molars were prepared using ProDesign Logic 30/.05 (PDL) or HyFlex EDM 25/.08 (HEDM). The specimens were scanned by micro-CT at 5 μm voxel size before and after root canal preparation. The percentage of microcracks was evaluated in images at 5, 10 and 20 μm voxel size, by two examiners at two moments. The Kappa and McNemar tests (α = 0.05) were used. The percentage of dentinal microcracks was similar before and after PDL and HEDM preparations, at 10 and 20 μm (p > 0.05). HEDM showed a higher percentage of dentinal microcracks in the middle third at 5 μm after preparation (p < 0.05). The detection of dentinal microcracks before and after instrumentation using PDL was more accurate at 5 μm than at 20 μm, in all thirds (p < 0.05). Within the limitations of this ex vivo study, as expected, the results showed that different resolutions influence the micro-CT analysis of microcracks. The highest accuracy in detecting microcracks was observed for analyses performed at 5 μm voxel size. HyFlex EDM caused even more microcracks to develop in the middle third, detectable only by visualization of images made at 5 μm voxel size.
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Sociedade Brasileira de Pesquisa Odontológica - SBPqO
2021
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oai:scielo:S1806-832420210001002772021-10-07Influence of voxel size on dentinal microcrack detection by micro-CT after root canal preparationPINTO,Jáder CamiloCOAGUILA-LLERENA,HernánTORRES,Fernanda Ferrari EstevesLUCAS-OLIVEIRA,ÉvertonBONAGAMBA,Tito JoséGUERREIRO-TANOMARU,Juliane MariaTANOMARU-FILHO,Mário Endodontics Dentin Root Canal Preparation Dental Pulp Cavity Abstract The aim of this study was to assess the influence of micro-computed tomography (micro-CT) voxel size on dentinal microcrack detection after root canal preparation using rotary heat-treated nickel-titanium files. Curved mesial root canals (n = 24) of mandibular molars were prepared using ProDesign Logic 30/.05 (PDL) or HyFlex EDM 25/.08 (HEDM). The specimens were scanned by micro-CT at 5 μm voxel size before and after root canal preparation. The percentage of microcracks was evaluated in images at 5, 10 and 20 μm voxel size, by two examiners at two moments. The Kappa and McNemar tests (α = 0.05) were used. The percentage of dentinal microcracks was similar before and after PDL and HEDM preparations, at 10 and 20 μm (p > 0.05). HEDM showed a higher percentage of dentinal microcracks in the middle third at 5 μm after preparation (p < 0.05). The detection of dentinal microcracks before and after instrumentation using PDL was more accurate at 5 μm than at 20 μm, in all thirds (p < 0.05). Within the limitations of this ex vivo study, as expected, the results showed that different resolutions influence the micro-CT analysis of microcracks. The highest accuracy in detecting microcracks was observed for analyses performed at 5 μm voxel size. HyFlex EDM caused even more microcracks to develop in the middle third, detectable only by visualization of images made at 5 μm voxel size.info:eu-repo/semantics/openAccessSociedade Brasileira de Pesquisa Odontológica - SBPqOBrazilian Oral Research v.35 20212021-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242021000100277en10.1590/1807-3107bor-2021.vol35.0074 |
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PINTO,Jáder Camilo COAGUILA-LLERENA,Hernán TORRES,Fernanda Ferrari Esteves LUCAS-OLIVEIRA,Éverton BONAGAMBA,Tito José GUERREIRO-TANOMARU,Juliane Maria TANOMARU-FILHO,Mário |
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PINTO,Jáder Camilo COAGUILA-LLERENA,Hernán TORRES,Fernanda Ferrari Esteves LUCAS-OLIVEIRA,Éverton BONAGAMBA,Tito José GUERREIRO-TANOMARU,Juliane Maria TANOMARU-FILHO,Mário Influence of voxel size on dentinal microcrack detection by micro-CT after root canal preparation |
author_facet |
PINTO,Jáder Camilo COAGUILA-LLERENA,Hernán TORRES,Fernanda Ferrari Esteves LUCAS-OLIVEIRA,Éverton BONAGAMBA,Tito José GUERREIRO-TANOMARU,Juliane Maria TANOMARU-FILHO,Mário |
author_sort |
PINTO,Jáder Camilo |
title |
Influence of voxel size on dentinal microcrack detection by micro-CT after root canal preparation |
title_short |
Influence of voxel size on dentinal microcrack detection by micro-CT after root canal preparation |
title_full |
Influence of voxel size on dentinal microcrack detection by micro-CT after root canal preparation |
title_fullStr |
Influence of voxel size on dentinal microcrack detection by micro-CT after root canal preparation |
title_full_unstemmed |
Influence of voxel size on dentinal microcrack detection by micro-CT after root canal preparation |
title_sort |
influence of voxel size on dentinal microcrack detection by micro-ct after root canal preparation |
description |
Abstract The aim of this study was to assess the influence of micro-computed tomography (micro-CT) voxel size on dentinal microcrack detection after root canal preparation using rotary heat-treated nickel-titanium files. Curved mesial root canals (n = 24) of mandibular molars were prepared using ProDesign Logic 30/.05 (PDL) or HyFlex EDM 25/.08 (HEDM). The specimens were scanned by micro-CT at 5 μm voxel size before and after root canal preparation. The percentage of microcracks was evaluated in images at 5, 10 and 20 μm voxel size, by two examiners at two moments. The Kappa and McNemar tests (α = 0.05) were used. The percentage of dentinal microcracks was similar before and after PDL and HEDM preparations, at 10 and 20 μm (p > 0.05). HEDM showed a higher percentage of dentinal microcracks in the middle third at 5 μm after preparation (p < 0.05). The detection of dentinal microcracks before and after instrumentation using PDL was more accurate at 5 μm than at 20 μm, in all thirds (p < 0.05). Within the limitations of this ex vivo study, as expected, the results showed that different resolutions influence the micro-CT analysis of microcracks. The highest accuracy in detecting microcracks was observed for analyses performed at 5 μm voxel size. HyFlex EDM caused even more microcracks to develop in the middle third, detectable only by visualization of images made at 5 μm voxel size. |
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Sociedade Brasileira de Pesquisa Odontológica - SBPqO |
publishDate |
2021 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242021000100277 |
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