Evaluation of the adaptation of zirconia-based fixed partial dentures using micro-CT technology
The objective of the study was to measure the marginal and internal fit of zirconia-based all-ceramic three-unit fixed partial dentures (FPDs) (Y-TZP - LAVA, 3M-ESPE), using a novel methodology based on micro-computed tomography (micro-CT) technology. Stainless steel models of prepared abutments wer...
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Sociedade Brasileira de Pesquisa Odontológica
2013-09-01
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doaj-326439b506654aedb7bdce00e0711f6b2020-11-24T21:33:03ZengSociedade Brasileira de Pesquisa Odontológica Brazilian Oral Research1807-31072013-09-0127539640210.1590/S1806-83242013000500003S1806-83242013000500396Evaluation of the adaptation of zirconia-based fixed partial dentures using micro-CT technologyMarcia BorbaWalter Gomes Miranda Jr.Paulo Francisco CesarJason Allan GriggsAlvaro Della BonaThe objective of the study was to measure the marginal and internal fit of zirconia-based all-ceramic three-unit fixed partial dentures (FPDs) (Y-TZP - LAVA, 3M-ESPE), using a novel methodology based on micro-computed tomography (micro-CT) technology. Stainless steel models of prepared abutments were fabricated to design FPDs. Ten frameworks were produced with 9 mm2 connector cross-sections using a LAVATM CAD-CAM system. All FPDs were veneered with a compatible porcelain. Each FPD was seated on the original model and scanned using micro-CT. Files were processed using NRecon and CTAn software. Adobe Photoshop and Image J software were used to analyze the cross-sectional images. Five measuring points were selected, as follows: MG - marginal gap; CA - chamfer area; AW - axial wall; AOT - axio-occlusal transition area; OA - occlusal area. Results were statistically analyzed by Kruskall-Wallis and Tukey's post hoc test (α= 0.05). There were significant differences for the gap width between the measurement points evaluated. MG showed the smallest median gap width (42 µm). OA had the highest median gap dimension (125 µm), followed by the AOT point (105 µm). CA and AW gap width values were statistically similar, 66 and 65 µm respectively. Thus, it was possible to conclude that different levels of adaptation were observed within the FPD, at the different measuring points. In addition, the micro-CT technology seems to be a reliable tool to evaluate the fit of dental restorations.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242013000500396&lng=en&tlng=enComputer-Aided DesignDenture, Partial, FixedCeramics |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Marcia Borba Walter Gomes Miranda Jr. Paulo Francisco Cesar Jason Allan Griggs Alvaro Della Bona |
spellingShingle |
Marcia Borba Walter Gomes Miranda Jr. Paulo Francisco Cesar Jason Allan Griggs Alvaro Della Bona Evaluation of the adaptation of zirconia-based fixed partial dentures using micro-CT technology Brazilian Oral Research Computer-Aided Design Denture, Partial, Fixed Ceramics |
author_facet |
Marcia Borba Walter Gomes Miranda Jr. Paulo Francisco Cesar Jason Allan Griggs Alvaro Della Bona |
author_sort |
Marcia Borba |
title |
Evaluation of the adaptation of zirconia-based fixed partial dentures using micro-CT technology |
title_short |
Evaluation of the adaptation of zirconia-based fixed partial dentures using micro-CT technology |
title_full |
Evaluation of the adaptation of zirconia-based fixed partial dentures using micro-CT technology |
title_fullStr |
Evaluation of the adaptation of zirconia-based fixed partial dentures using micro-CT technology |
title_full_unstemmed |
Evaluation of the adaptation of zirconia-based fixed partial dentures using micro-CT technology |
title_sort |
evaluation of the adaptation of zirconia-based fixed partial dentures using micro-ct technology |
publisher |
Sociedade Brasileira de Pesquisa Odontológica |
series |
Brazilian Oral Research |
issn |
1807-3107 |
publishDate |
2013-09-01 |
description |
The objective of the study was to measure the marginal and internal fit of zirconia-based all-ceramic three-unit fixed partial dentures (FPDs) (Y-TZP - LAVA, 3M-ESPE), using a novel methodology based on micro-computed tomography (micro-CT) technology. Stainless steel models of prepared abutments were fabricated to design FPDs. Ten frameworks were produced with 9 mm2 connector cross-sections using a LAVATM CAD-CAM system. All FPDs were veneered with a compatible porcelain. Each FPD was seated on the original model and scanned using micro-CT. Files were processed using NRecon and CTAn software. Adobe Photoshop and Image J software were used to analyze the cross-sectional images. Five measuring points were selected, as follows: MG - marginal gap; CA - chamfer area; AW - axial wall; AOT - axio-occlusal transition area; OA - occlusal area. Results were statistically analyzed by Kruskall-Wallis and Tukey's post hoc test (α= 0.05). There were significant differences for the gap width between the measurement points evaluated. MG showed the smallest median gap width (42 µm). OA had the highest median gap dimension (125 µm), followed by the AOT point (105 µm). CA and AW gap width values were statistically similar, 66 and 65 µm respectively. Thus, it was possible to conclude that different levels of adaptation were observed within the FPD, at the different measuring points. In addition, the micro-CT technology seems to be a reliable tool to evaluate the fit of dental restorations. |
topic |
Computer-Aided Design Denture, Partial, Fixed Ceramics |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242013000500396&lng=en&tlng=en |
work_keys_str_mv |
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