Influence of Different Pigmentations and Accelerated Aging on the Hardness and Tear Strength of the A-2186 and MDX4-4210 Silicones
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/10.1155/2020/8492091 http://hdl.handle.net/11449/206610 |
Resumo: | Objective. To evaluate the influence of different pigmentations and accelerated aging on the hardness and tear strength of the A-2186 and MDX4-4210 silicones. Materials and Methods. The samples A-2186 and MDX4-4210 were manufactured without and with pigmentations (black, bronze, and pink). For the Shore A hardness test, 80 samples of each silicone were fabricated, and for the tear strength test, 320 samples of each silicone were fabricated. Eight groups were created for each test (n = 10). These tests were performed before and after 252, 504, and 1008 hours of aging. Three-way repeated-measures analysis of variance and the Tukey test were performed (α = 0.05). Results. The A-2186 silicone showed higher hardness and tear strength when compared with the MDX4-4210 silicone p<0.05, except in the hardness of the A-2186 and MDX4-4210 groups without pigmentation after 1008 hours p>0.05. All hardness values were between 25 and 35 units, regardless of the silicone type, period, and pigmentation (or no pigmentation). In most situations, the hardness of silicones used increased after 252 hours p<0.05. The nonpigmented MDX4-4210 group and all A-2186 groups showed an increase in tear strength after 252 hours p<0.05. For the nonpigmented MDX4-4210 group, from 252 to 1008 hours, there was no change in tear strength p>0.05. All pigmented MDX4-4210 groups showed no change in tear strength from 0 (initial) to 1008 hours of aging p>0.05. In all A-2186 groups, from 252 to 504 hours, there was a reduction in tear strength p<0.05, and from 504 to 1008 hours, there was an increase in tear strength p<0.05, except in the bronze A-2186 group p>0.05. Conclusion. In most situations, the A-2186 silicone showed significantly higher values of hardness and tear strength than the MDX4-4210 silicone. All hardness values were considered clinically acceptable. Accelerated aging could increase, decrease, or not significantly change the hardness and tear strength of the silicones used. The results of hardness and tear strength suggest that MDX4-4210 was more influenced by the presence of pigmentation after aging. |
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Influence of Different Pigmentations and Accelerated Aging on the Hardness and Tear Strength of the A-2186 and MDX4-4210 SiliconesObjective. To evaluate the influence of different pigmentations and accelerated aging on the hardness and tear strength of the A-2186 and MDX4-4210 silicones. Materials and Methods. The samples A-2186 and MDX4-4210 were manufactured without and with pigmentations (black, bronze, and pink). For the Shore A hardness test, 80 samples of each silicone were fabricated, and for the tear strength test, 320 samples of each silicone were fabricated. Eight groups were created for each test (n = 10). These tests were performed before and after 252, 504, and 1008 hours of aging. Three-way repeated-measures analysis of variance and the Tukey test were performed (α = 0.05). Results. The A-2186 silicone showed higher hardness and tear strength when compared with the MDX4-4210 silicone p<0.05, except in the hardness of the A-2186 and MDX4-4210 groups without pigmentation after 1008 hours p>0.05. All hardness values were between 25 and 35 units, regardless of the silicone type, period, and pigmentation (or no pigmentation). In most situations, the hardness of silicones used increased after 252 hours p<0.05. The nonpigmented MDX4-4210 group and all A-2186 groups showed an increase in tear strength after 252 hours p<0.05. For the nonpigmented MDX4-4210 group, from 252 to 1008 hours, there was no change in tear strength p>0.05. All pigmented MDX4-4210 groups showed no change in tear strength from 0 (initial) to 1008 hours of aging p>0.05. In all A-2186 groups, from 252 to 504 hours, there was a reduction in tear strength p<0.05, and from 504 to 1008 hours, there was an increase in tear strength p<0.05, except in the bronze A-2186 group p>0.05. Conclusion. In most situations, the A-2186 silicone showed significantly higher values of hardness and tear strength than the MDX4-4210 silicone. All hardness values were considered clinically acceptable. Accelerated aging could increase, decrease, or not significantly change the hardness and tear strength of the silicones used. The results of hardness and tear strength suggest that MDX4-4210 was more influenced by the presence of pigmentation after aging.Department of Dental Materials and Prosthodontics São Paulo State University (UNESP) School of DentistryOral Oncology Center São Paulo State University (UNESP) School of DentistryBrazilian Institute of Northern Education (IBEN)Department of Pediatric and Social Dentistry São Paulo State University (UNESP) School of DentistryDepartment of Dental Materials and Prosthodontics São Paulo State University (UNESP) School of DentistryOral Oncology Center São Paulo State University (UNESP) School of DentistryDepartment of Pediatric and Social Dentistry São Paulo State University (UNESP) School of DentistryUniversidade Estadual Paulista (Unesp)Brazilian Institute of Northern Education (IBEN)Marrega Malavazi, Estefânia [UNESP]Dos Santos, Daniela Micheline [UNESP]De Moraes Melo Neto, Clóvis Lamartine [UNESP]Pereira De Caxias, Fernanda [UNESP]Freitas Da Silva, Emily Vivianne [UNESP]Bannwart, Lisiane Cristina [UNESP]Pesqueira, Aldiéris Alves [UNESP]De Melo Moreno, André LuizDe Magalhães Bertoz, André Pinheiro [UNESP]Goiato, Marcelo Coelho [UNESP]2021-06-25T10:35:10Z2021-06-25T10:35:10Z2020-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1155/2020/8492091International Journal of Dentistry, v. 2020.1687-87361687-8728http://hdl.handle.net/11449/20661010.1155/2020/84920912-s2.0-85092095400Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengInternational Journal of Dentistryinfo:eu-repo/semantics/openAccess2024-04-11T20:16:33Zoai:repositorio.unesp.br:11449/206610Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-04-11T20:16:33Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Influence of Different Pigmentations and Accelerated Aging on the Hardness and Tear Strength of the A-2186 and MDX4-4210 Silicones |
title |
Influence of Different Pigmentations and Accelerated Aging on the Hardness and Tear Strength of the A-2186 and MDX4-4210 Silicones |
spellingShingle |
Influence of Different Pigmentations and Accelerated Aging on the Hardness and Tear Strength of the A-2186 and MDX4-4210 Silicones Marrega Malavazi, Estefânia [UNESP] |
title_short |
Influence of Different Pigmentations and Accelerated Aging on the Hardness and Tear Strength of the A-2186 and MDX4-4210 Silicones |
title_full |
Influence of Different Pigmentations and Accelerated Aging on the Hardness and Tear Strength of the A-2186 and MDX4-4210 Silicones |
title_fullStr |
Influence of Different Pigmentations and Accelerated Aging on the Hardness and Tear Strength of the A-2186 and MDX4-4210 Silicones |
title_full_unstemmed |
Influence of Different Pigmentations and Accelerated Aging on the Hardness and Tear Strength of the A-2186 and MDX4-4210 Silicones |
title_sort |
Influence of Different Pigmentations and Accelerated Aging on the Hardness and Tear Strength of the A-2186 and MDX4-4210 Silicones |
author |
Marrega Malavazi, Estefânia [UNESP] |
author_facet |
Marrega Malavazi, Estefânia [UNESP] Dos Santos, Daniela Micheline [UNESP] De Moraes Melo Neto, Clóvis Lamartine [UNESP] Pereira De Caxias, Fernanda [UNESP] Freitas Da Silva, Emily Vivianne [UNESP] Bannwart, Lisiane Cristina [UNESP] Pesqueira, Aldiéris Alves [UNESP] De Melo Moreno, André Luiz De Magalhães Bertoz, André Pinheiro [UNESP] Goiato, Marcelo Coelho [UNESP] |
author_role |
author |
author2 |
Dos Santos, Daniela Micheline [UNESP] De Moraes Melo Neto, Clóvis Lamartine [UNESP] Pereira De Caxias, Fernanda [UNESP] Freitas Da Silva, Emily Vivianne [UNESP] Bannwart, Lisiane Cristina [UNESP] Pesqueira, Aldiéris Alves [UNESP] De Melo Moreno, André Luiz De Magalhães Bertoz, André Pinheiro [UNESP] Goiato, Marcelo Coelho [UNESP] |
author2_role |
author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Brazilian Institute of Northern Education (IBEN) |
dc.contributor.author.fl_str_mv |
Marrega Malavazi, Estefânia [UNESP] Dos Santos, Daniela Micheline [UNESP] De Moraes Melo Neto, Clóvis Lamartine [UNESP] Pereira De Caxias, Fernanda [UNESP] Freitas Da Silva, Emily Vivianne [UNESP] Bannwart, Lisiane Cristina [UNESP] Pesqueira, Aldiéris Alves [UNESP] De Melo Moreno, André Luiz De Magalhães Bertoz, André Pinheiro [UNESP] Goiato, Marcelo Coelho [UNESP] |
description |
Objective. To evaluate the influence of different pigmentations and accelerated aging on the hardness and tear strength of the A-2186 and MDX4-4210 silicones. Materials and Methods. The samples A-2186 and MDX4-4210 were manufactured without and with pigmentations (black, bronze, and pink). For the Shore A hardness test, 80 samples of each silicone were fabricated, and for the tear strength test, 320 samples of each silicone were fabricated. Eight groups were created for each test (n = 10). These tests were performed before and after 252, 504, and 1008 hours of aging. Three-way repeated-measures analysis of variance and the Tukey test were performed (α = 0.05). Results. The A-2186 silicone showed higher hardness and tear strength when compared with the MDX4-4210 silicone p<0.05, except in the hardness of the A-2186 and MDX4-4210 groups without pigmentation after 1008 hours p>0.05. All hardness values were between 25 and 35 units, regardless of the silicone type, period, and pigmentation (or no pigmentation). In most situations, the hardness of silicones used increased after 252 hours p<0.05. The nonpigmented MDX4-4210 group and all A-2186 groups showed an increase in tear strength after 252 hours p<0.05. For the nonpigmented MDX4-4210 group, from 252 to 1008 hours, there was no change in tear strength p>0.05. All pigmented MDX4-4210 groups showed no change in tear strength from 0 (initial) to 1008 hours of aging p>0.05. In all A-2186 groups, from 252 to 504 hours, there was a reduction in tear strength p<0.05, and from 504 to 1008 hours, there was an increase in tear strength p<0.05, except in the bronze A-2186 group p>0.05. Conclusion. In most situations, the A-2186 silicone showed significantly higher values of hardness and tear strength than the MDX4-4210 silicone. All hardness values were considered clinically acceptable. Accelerated aging could increase, decrease, or not significantly change the hardness and tear strength of the silicones used. The results of hardness and tear strength suggest that MDX4-4210 was more influenced by the presence of pigmentation after aging. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-01-01 2021-06-25T10:35:10Z 2021-06-25T10:35:10Z |
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/10.1155/2020/8492091 International Journal of Dentistry, v. 2020. 1687-8736 1687-8728 http://hdl.handle.net/11449/206610 10.1155/2020/8492091 2-s2.0-85092095400 |
url |
http://dx.doi.org/10.1155/2020/8492091 http://hdl.handle.net/11449/206610 |
identifier_str_mv |
International Journal of Dentistry, v. 2020. 1687-8736 1687-8728 10.1155/2020/8492091 2-s2.0-85092095400 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
International Journal of Dentistry |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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_ |
1799964546790588416 |