Torque maintenance capacity, vertical misfit, load to failure, and stress concentration of zirconia restorations cemented or notched to titanium bases
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.11607/jomi.7731 http://hdl.handle.net/11449/201633 |
Resumo: | Purpose: Different titanium bases for implant-supported prostheses can present different mechanical behavior. The goal of this study was to evaluate the torque before and after fatigue, the load to failure, and stress concentration of zirconia restorations cemented or notched to a titanium base. Materials and Methods: Forty implants were included in polyurethane cylinders and divided into two groups: zirconia restoration cemented on a titanium base and zirconia restoration notched on a titanium base. The specimens had their torque loosening and vertical misfit evaluated before and after cyclic fatigue (200 N/2 Hz/2 x 106 cycles/3 6 7°C). Load to failure was evaluated in a universal testing machine (1 mm/min, 1,000 kgf). Failures were evaluated by scanning electron microscopy. Three-dimensional models were created, and the stress concentration was calculated using the finite element method. Data from the in vitro tests were submitted to two-way analysis of variance and Tukey test (α =.5). Results: The cemented restorations presented less torque loosening (19.79 to 15.95 Ncm), lower vertical misfit (3.7 to 10.5 μm), lower stress concentration in the restoration (88.2 to 99.8 MPa), and higher fracture load (451.3 to 390.8 N) than notched restorations. Conclusion: The presence of a cement layer between the restoration and titanium base reduced the susceptibility to abutment screw loosening, improved the resistance to compressive load, and reduced the stress concentration in the restoration. |
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Torque maintenance capacity, vertical misfit, load to failure, and stress concentration of zirconia restorations cemented or notched to titanium bases3DBiomechanicsCAD/CAMFinite element analysisProsthodonticsPurpose: Different titanium bases for implant-supported prostheses can present different mechanical behavior. The goal of this study was to evaluate the torque before and after fatigue, the load to failure, and stress concentration of zirconia restorations cemented or notched to a titanium base. Materials and Methods: Forty implants were included in polyurethane cylinders and divided into two groups: zirconia restoration cemented on a titanium base and zirconia restoration notched on a titanium base. The specimens had their torque loosening and vertical misfit evaluated before and after cyclic fatigue (200 N/2 Hz/2 x 106 cycles/3 6 7°C). Load to failure was evaluated in a universal testing machine (1 mm/min, 1,000 kgf). Failures were evaluated by scanning electron microscopy. Three-dimensional models were created, and the stress concentration was calculated using the finite element method. Data from the in vitro tests were submitted to two-way analysis of variance and Tukey test (α =.5). Results: The cemented restorations presented less torque loosening (19.79 to 15.95 Ncm), lower vertical misfit (3.7 to 10.5 μm), lower stress concentration in the restoration (88.2 to 99.8 MPa), and higher fracture load (451.3 to 390.8 N) than notched restorations. Conclusion: The presence of a cement layer between the restoration and titanium base reduced the susceptibility to abutment screw loosening, improved the resistance to compressive load, and reduced the stress concentration in the restoration.Department of Dental Materials and Prosthodontics São Paulo State University (Unesp) Institute of Science and TechnologyDepartment of Dental Materials and Prosthodontics São Paulo State University (Unesp) Institute of Science and TechnologyUniversidade Estadual Paulista (Unesp)Adolfi, Dario [UNESP]Tribst, João Paulo Mendes [UNESP]Borges, Alexandre Luiz Souto [UNESP]Bottino, Marco Antonio [UNESP]2020-12-12T02:37:43Z2020-12-12T02:37:43Z2020-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article357-365http://dx.doi.org/10.11607/jomi.7731International Journal of Oral and Maxillofacial Implants, v. 35, n. 2, p. 357-365, 2020.1942-44340882-2786http://hdl.handle.net/11449/20163310.11607/jomi.77312-s2.0-85081946031Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengInternational Journal of Oral and Maxillofacial Implantsinfo:eu-repo/semantics/openAccess2021-10-22T20:42:45Zoai:repositorio.unesp.br:11449/201633Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:13:24.611010Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Torque maintenance capacity, vertical misfit, load to failure, and stress concentration of zirconia restorations cemented or notched to titanium bases |
title |
Torque maintenance capacity, vertical misfit, load to failure, and stress concentration of zirconia restorations cemented or notched to titanium bases |
spellingShingle |
Torque maintenance capacity, vertical misfit, load to failure, and stress concentration of zirconia restorations cemented or notched to titanium bases Adolfi, Dario [UNESP] 3D Biomechanics CAD/CAM Finite element analysis Prosthodontics |
title_short |
Torque maintenance capacity, vertical misfit, load to failure, and stress concentration of zirconia restorations cemented or notched to titanium bases |
title_full |
Torque maintenance capacity, vertical misfit, load to failure, and stress concentration of zirconia restorations cemented or notched to titanium bases |
title_fullStr |
Torque maintenance capacity, vertical misfit, load to failure, and stress concentration of zirconia restorations cemented or notched to titanium bases |
title_full_unstemmed |
Torque maintenance capacity, vertical misfit, load to failure, and stress concentration of zirconia restorations cemented or notched to titanium bases |
title_sort |
Torque maintenance capacity, vertical misfit, load to failure, and stress concentration of zirconia restorations cemented or notched to titanium bases |
author |
Adolfi, Dario [UNESP] |
author_facet |
Adolfi, Dario [UNESP] Tribst, João Paulo Mendes [UNESP] Borges, Alexandre Luiz Souto [UNESP] Bottino, Marco Antonio [UNESP] |
author_role |
author |
author2 |
Tribst, João Paulo Mendes [UNESP] Borges, Alexandre Luiz Souto [UNESP] Bottino, Marco Antonio [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Adolfi, Dario [UNESP] Tribst, João Paulo Mendes [UNESP] Borges, Alexandre Luiz Souto [UNESP] Bottino, Marco Antonio [UNESP] |
dc.subject.por.fl_str_mv |
3D Biomechanics CAD/CAM Finite element analysis Prosthodontics |
topic |
3D Biomechanics CAD/CAM Finite element analysis Prosthodontics |
description |
Purpose: Different titanium bases for implant-supported prostheses can present different mechanical behavior. The goal of this study was to evaluate the torque before and after fatigue, the load to failure, and stress concentration of zirconia restorations cemented or notched to a titanium base. Materials and Methods: Forty implants were included in polyurethane cylinders and divided into two groups: zirconia restoration cemented on a titanium base and zirconia restoration notched on a titanium base. The specimens had their torque loosening and vertical misfit evaluated before and after cyclic fatigue (200 N/2 Hz/2 x 106 cycles/3 6 7°C). Load to failure was evaluated in a universal testing machine (1 mm/min, 1,000 kgf). Failures were evaluated by scanning electron microscopy. Three-dimensional models were created, and the stress concentration was calculated using the finite element method. Data from the in vitro tests were submitted to two-way analysis of variance and Tukey test (α =.5). Results: The cemented restorations presented less torque loosening (19.79 to 15.95 Ncm), lower vertical misfit (3.7 to 10.5 μm), lower stress concentration in the restoration (88.2 to 99.8 MPa), and higher fracture load (451.3 to 390.8 N) than notched restorations. Conclusion: The presence of a cement layer between the restoration and titanium base reduced the susceptibility to abutment screw loosening, improved the resistance to compressive load, and reduced the stress concentration in the restoration. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-12T02:37:43Z 2020-12-12T02:37:43Z 2020-01-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.11607/jomi.7731 International Journal of Oral and Maxillofacial Implants, v. 35, n. 2, p. 357-365, 2020. 1942-4434 0882-2786 http://hdl.handle.net/11449/201633 10.11607/jomi.7731 2-s2.0-85081946031 |
url |
http://dx.doi.org/10.11607/jomi.7731 http://hdl.handle.net/11449/201633 |
identifier_str_mv |
International Journal of Oral and Maxillofacial Implants, v. 35, n. 2, p. 357-365, 2020. 1942-4434 0882-2786 10.11607/jomi.7731 2-s2.0-85081946031 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
International Journal of Oral and Maxillofacial Implants |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
357-365 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129174969253888 |