Effects of artificial aging conditions on yttria-stabilized zirconia implant abutments
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.prosdent.2016.01.011 http://hdl.handle.net/11449/172717 |
Resumo: | Statement of problem Most ceramic abutments are fabricated from yttria-stabilized tetragonal zirconia (Y-TZP). However, Y-TZP undergoes hydrothermal degradation, a process that is not well understood. Purpose The purpose of this in vitro study was to assess the effects of artificial aging conditions on the fracture load, phase stability, and surface microstructure of a Y-TZP abutment. Material and methods Thirty-two prefabricated Y-TZP abutments were screwed and tightened down to external hexagon implants and divided into 4 groups (n = 8): C, control; MC, mechanical cycling (1×106 cycles; 10 Hz); AUT, autoclaving (134°C; 5 hours; 0.2 MPa); and TC, thermal cycling (104 cycles; 5°/55°C). A single-load-to-fracture test was performed at a crosshead speed of 0.5 mm/min to assess the assembly's resistance to fracture (ISO Norm 14801). X-ray diffraction (XRD) analysis was applied to observe and quantify the tetragonal-monoclinic (t-m) phase transformation. Representative abutments were examined with high-resolution scanning electron microscopy (SEM) to observe the surface characteristics of the abutments. Load-to-fracture test results (N) were compared by ANOVA and Tukey test (α=.05). Results XRD measurements revealed the monoclinic phase in some abutments after each aging condition. All the aging conditions reduced the fracture load significantly (P<.001). Mechanical cycling reduced the fracture load more than autoclaving (P=.034). No differences were found in the process of surface degradation among the groups; however, the SEM detected grinding-induced surface flaws and microcracks. Conclusions The resistance to fracture and the phase stability of Y-TZP implant abutments were susceptible to hydrothermal and mechanical conditions. The surface microstructure of Y-TZP abutments did not change after aging conditions. |
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Effects of artificial aging conditions on yttria-stabilized zirconia implant abutmentsStatement of problem Most ceramic abutments are fabricated from yttria-stabilized tetragonal zirconia (Y-TZP). However, Y-TZP undergoes hydrothermal degradation, a process that is not well understood. Purpose The purpose of this in vitro study was to assess the effects of artificial aging conditions on the fracture load, phase stability, and surface microstructure of a Y-TZP abutment. Material and methods Thirty-two prefabricated Y-TZP abutments were screwed and tightened down to external hexagon implants and divided into 4 groups (n = 8): C, control; MC, mechanical cycling (1×106 cycles; 10 Hz); AUT, autoclaving (134°C; 5 hours; 0.2 MPa); and TC, thermal cycling (104 cycles; 5°/55°C). A single-load-to-fracture test was performed at a crosshead speed of 0.5 mm/min to assess the assembly's resistance to fracture (ISO Norm 14801). X-ray diffraction (XRD) analysis was applied to observe and quantify the tetragonal-monoclinic (t-m) phase transformation. Representative abutments were examined with high-resolution scanning electron microscopy (SEM) to observe the surface characteristics of the abutments. Load-to-fracture test results (N) were compared by ANOVA and Tukey test (α=.05). Results XRD measurements revealed the monoclinic phase in some abutments after each aging condition. All the aging conditions reduced the fracture load significantly (P<.001). Mechanical cycling reduced the fracture load more than autoclaving (P=.034). No differences were found in the process of surface degradation among the groups; however, the SEM detected grinding-induced surface flaws and microcracks. Conclusions The resistance to fracture and the phase stability of Y-TZP implant abutments were susceptible to hydrothermal and mechanical conditions. The surface microstructure of Y-TZP abutments did not change after aging conditions.Professor Division of Prosthetic Dentistry Metropolitan Union of Education and Culture School of DentistryDoctoral student Department of Dental Materials and Prosthodontics São Paulo State University (UNESP) Araraquara School of DentistryPostdoctoral Researcher Department of Physical Chemistry São Paulo State University Chemical InstituteAssociate Professor Department of Medical Biophysics Western University Schulich School of Medicine & DentistryRestorative Dentistry Department of Dentistry Western University Schulich School of Medicine & DentistryAdjunct Professor. Department of Dental Materials and Prosthodontics São Paulo State University Araraquara School of DentistryDoctoral student Department of Dental Materials and Prosthodontics São Paulo State University (UNESP) Araraquara School of DentistryPostdoctoral Researcher Department of Physical Chemistry São Paulo State University Chemical InstituteAdjunct Professor. Department of Dental Materials and Prosthodontics São Paulo State University Araraquara School of DentistrySchool of DentistryUniversidade Estadual Paulista (Unesp)Schulich School of Medicine & DentistryBasílio, Mariana de AlmeidaCardoso, Kátia Vieira [UNESP]Antonio, Selma Gutierrez [UNESP]Rizkalla, Amin SamiSantos Junior, Gildo CoelhoArioli Filho, João Neudenir [UNESP]2018-12-11T17:01:54Z2018-12-11T17:01:54Z2016-08-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article277-285application/pdfhttp://dx.doi.org/10.1016/j.prosdent.2016.01.011Journal of Prosthetic Dentistry, v. 116, n. 2, p. 277-285, 2016.0022-3913http://hdl.handle.net/11449/17271710.1016/j.prosdent.2016.01.0112-s2.0-849612267942-s2.0-84961226794.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Prosthetic Dentistry1,087info:eu-repo/semantics/openAccess2024-01-24T06:30:34Zoai:repositorio.unesp.br:11449/172717Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:49:48.053542Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Effects of artificial aging conditions on yttria-stabilized zirconia implant abutments |
title |
Effects of artificial aging conditions on yttria-stabilized zirconia implant abutments |
spellingShingle |
Effects of artificial aging conditions on yttria-stabilized zirconia implant abutments Basílio, Mariana de Almeida |
title_short |
Effects of artificial aging conditions on yttria-stabilized zirconia implant abutments |
title_full |
Effects of artificial aging conditions on yttria-stabilized zirconia implant abutments |
title_fullStr |
Effects of artificial aging conditions on yttria-stabilized zirconia implant abutments |
title_full_unstemmed |
Effects of artificial aging conditions on yttria-stabilized zirconia implant abutments |
title_sort |
Effects of artificial aging conditions on yttria-stabilized zirconia implant abutments |
author |
Basílio, Mariana de Almeida |
author_facet |
Basílio, Mariana de Almeida Cardoso, Kátia Vieira [UNESP] Antonio, Selma Gutierrez [UNESP] Rizkalla, Amin Sami Santos Junior, Gildo Coelho Arioli Filho, João Neudenir [UNESP] |
author_role |
author |
author2 |
Cardoso, Kátia Vieira [UNESP] Antonio, Selma Gutierrez [UNESP] Rizkalla, Amin Sami Santos Junior, Gildo Coelho Arioli Filho, João Neudenir [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
School of Dentistry Universidade Estadual Paulista (Unesp) Schulich School of Medicine & Dentistry |
dc.contributor.author.fl_str_mv |
Basílio, Mariana de Almeida Cardoso, Kátia Vieira [UNESP] Antonio, Selma Gutierrez [UNESP] Rizkalla, Amin Sami Santos Junior, Gildo Coelho Arioli Filho, João Neudenir [UNESP] |
description |
Statement of problem Most ceramic abutments are fabricated from yttria-stabilized tetragonal zirconia (Y-TZP). However, Y-TZP undergoes hydrothermal degradation, a process that is not well understood. Purpose The purpose of this in vitro study was to assess the effects of artificial aging conditions on the fracture load, phase stability, and surface microstructure of a Y-TZP abutment. Material and methods Thirty-two prefabricated Y-TZP abutments were screwed and tightened down to external hexagon implants and divided into 4 groups (n = 8): C, control; MC, mechanical cycling (1×106 cycles; 10 Hz); AUT, autoclaving (134°C; 5 hours; 0.2 MPa); and TC, thermal cycling (104 cycles; 5°/55°C). A single-load-to-fracture test was performed at a crosshead speed of 0.5 mm/min to assess the assembly's resistance to fracture (ISO Norm 14801). X-ray diffraction (XRD) analysis was applied to observe and quantify the tetragonal-monoclinic (t-m) phase transformation. Representative abutments were examined with high-resolution scanning electron microscopy (SEM) to observe the surface characteristics of the abutments. Load-to-fracture test results (N) were compared by ANOVA and Tukey test (α=.05). Results XRD measurements revealed the monoclinic phase in some abutments after each aging condition. All the aging conditions reduced the fracture load significantly (P<.001). Mechanical cycling reduced the fracture load more than autoclaving (P=.034). No differences were found in the process of surface degradation among the groups; however, the SEM detected grinding-induced surface flaws and microcracks. Conclusions The resistance to fracture and the phase stability of Y-TZP implant abutments were susceptible to hydrothermal and mechanical conditions. The surface microstructure of Y-TZP abutments did not change after aging conditions. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-08-01 2018-12-11T17:01:54Z 2018-12-11T17:01:54Z |
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/10.1016/j.prosdent.2016.01.011 Journal of Prosthetic Dentistry, v. 116, n. 2, p. 277-285, 2016. 0022-3913 http://hdl.handle.net/11449/172717 10.1016/j.prosdent.2016.01.011 2-s2.0-84961226794 2-s2.0-84961226794.pdf |
url |
http://dx.doi.org/10.1016/j.prosdent.2016.01.011 http://hdl.handle.net/11449/172717 |
identifier_str_mv |
Journal of Prosthetic Dentistry, v. 116, n. 2, p. 277-285, 2016. 0022-3913 10.1016/j.prosdent.2016.01.011 2-s2.0-84961226794 2-s2.0-84961226794.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Prosthetic Dentistry 1,087 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
277-285 application/pdf |
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 |
|
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1808129556660355072 |