Influence of substrate, cement and aging on the biaxial flexural strength of lithium disilicate
Objective: To evaluate the biaxial flexural strength (BFS) of lithium disilicate (L), cemented on different substrates (epoxy resin - E and metal - M) with dual-cure resin cement (Rc) and zinc phosphate cement (Zc), not aged, thermally aged (TC) or thermo-mechanical aged (TC/MC). Material and Metho...
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| Language: | English |
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Universidade Estadual Paulista
2023-10-01
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| Series: | Brazilian Dental Science |
| Online Access: | https://ojs.ict.unesp.br/index.php/cob/article/view/3923 |
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| author | Leonardo Custódio de Lima Jean Soares Miranda Ronaldo Luís Almeida de Carvalho Aline Serrado de Pinho Barcellos Marina Amaral Estevão Tomomitsu Kimpara |
| author_facet | Leonardo Custódio de Lima Jean Soares Miranda Ronaldo Luís Almeida de Carvalho Aline Serrado de Pinho Barcellos Marina Amaral Estevão Tomomitsu Kimpara |
| author_sort | Leonardo Custódio de Lima |
| collection | DOAJ |
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Objective: To evaluate the biaxial flexural strength (BFS) of lithium disilicate (L), cemented on different substrates (epoxy resin - E and metal - M) with dual-cure resin cement (Rc) and zinc phosphate cement (Zc), not aged, thermally aged (TC) or thermo-mechanical aged (TC/MC). Material and Methods: Disks of L, E, and M were fabricated, and the cementation was performed according to the following groups: ERc (L+E+Rc); MRc (L+M+Rc); MZc (L+M+Zc); EZc (L+E+Zc). Ten samples from each described group were tested in BFS, ten more samples were subjected to TC (1×104 cycles between 5 ºC and 55 ºC water), and the last 10 samples were subjected to TC/MC (MC: 1.2×106 cycles, 50 N, 3.8 Hz). The BFS test was performed and scanning electron microscopy (SEM) was performed to evaluate the failure mode. The effect of the cementation strategy (cement/substrate) was compared in each aging method and the effect of the aging method was evaluated for each cementation strategy by one-way ANOVA and Tukey post-hoc test (a=0.05). Results: The strength values were highest to M (237.8 ~ 463.9 MPa), in comparison to the E (41.03 ~ 66.76 MPa), despite aging and luting agent. Flexural strength data decreased after TC and TC/MC in groups cemented with Zc, but was stable when cemented with Rc. SEM analysis indicated that failure origins were located at the tensile surface of the L. Conclusion: Lithium disilicate discs cemented to the metallic substrate presented the highest biaxial flexural strength. The cementation with dual-cure resin cement did not decrease BFS after aging.
KEYWORDS
Aging; Cementation; Ceramics; Flexural strength; Lithium disilicate.
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| format | Article |
| id | doaj-art-9bfb72bceeb948928eb74cb3b2b61810 |
| institution | Kabale University |
| issn | 2178-6011 |
| language | English |
| publishDate | 2023-10-01 |
| publisher | Universidade Estadual Paulista |
| record_format | Article |
| series | Brazilian Dental Science |
| spelling | doaj-art-9bfb72bceeb948928eb74cb3b2b618102025-08-22T14:53:10ZengUniversidade Estadual PaulistaBrazilian Dental Science2178-60112023-10-0126410.4322/bds.2023.e3923Influence of substrate, cement and aging on the biaxial flexural strength of lithium disilicateLeonardo Custódio de Lima 0https://orcid.org/0000-0002-8016-9636Jean Soares Miranda1https://orcid.org/0000-0001-5379-0155Ronaldo Luís Almeida de Carvalho2https://orcid.org/0000-0002-5383-7758Aline Serrado de Pinho Barcellos3https://orcid.org/0000-0001-9638-7147Marina Amaral4https://orcid.org/0000-0002-4301-2760Estevão Tomomitsu Kimpara5https://orcid.org/0000-0003-0586-4644Departamento de Odontologia Restauradora, Faculdade de Odontologia, Universidade de São Paulo, SP, Brazil.Departamento de Odontologia, Universidade Federal de Juiz de Fora, Governador Valadares, MG, Brazil.Departamento de Odontologia, Universidade Braz Cubas, Mogi das Cruzes, SP, Brazil.Departamento de Materiais e Dentários e Prótese, Instituto de Ciência e Tecnologia, Unesp, São José dos Campos, SP, Brazil.Departamento de Odontologia, Universidade de Taubaté, Taubaté, SP, Brazil.Departamento de Materiais e Dentários e Prótese, Instituto de Ciência e Tecnologia, Unesp, São José dos Campos, SP, Brazil. Objective: To evaluate the biaxial flexural strength (BFS) of lithium disilicate (L), cemented on different substrates (epoxy resin - E and metal - M) with dual-cure resin cement (Rc) and zinc phosphate cement (Zc), not aged, thermally aged (TC) or thermo-mechanical aged (TC/MC). Material and Methods: Disks of L, E, and M were fabricated, and the cementation was performed according to the following groups: ERc (L+E+Rc); MRc (L+M+Rc); MZc (L+M+Zc); EZc (L+E+Zc). Ten samples from each described group were tested in BFS, ten more samples were subjected to TC (1×104 cycles between 5 ºC and 55 ºC water), and the last 10 samples were subjected to TC/MC (MC: 1.2×106 cycles, 50 N, 3.8 Hz). The BFS test was performed and scanning electron microscopy (SEM) was performed to evaluate the failure mode. The effect of the cementation strategy (cement/substrate) was compared in each aging method and the effect of the aging method was evaluated for each cementation strategy by one-way ANOVA and Tukey post-hoc test (a=0.05). Results: The strength values were highest to M (237.8 ~ 463.9 MPa), in comparison to the E (41.03 ~ 66.76 MPa), despite aging and luting agent. Flexural strength data decreased after TC and TC/MC in groups cemented with Zc, but was stable when cemented with Rc. SEM analysis indicated that failure origins were located at the tensile surface of the L. Conclusion: Lithium disilicate discs cemented to the metallic substrate presented the highest biaxial flexural strength. The cementation with dual-cure resin cement did not decrease BFS after aging. KEYWORDS Aging; Cementation; Ceramics; Flexural strength; Lithium disilicate. https://ojs.ict.unesp.br/index.php/cob/article/view/3923 |
| spellingShingle | Leonardo Custódio de Lima Jean Soares Miranda Ronaldo Luís Almeida de Carvalho Aline Serrado de Pinho Barcellos Marina Amaral Estevão Tomomitsu Kimpara Influence of substrate, cement and aging on the biaxial flexural strength of lithium disilicate Brazilian Dental Science |
| title | Influence of substrate, cement and aging on the biaxial flexural strength of lithium disilicate |
| title_full | Influence of substrate, cement and aging on the biaxial flexural strength of lithium disilicate |
| title_fullStr | Influence of substrate, cement and aging on the biaxial flexural strength of lithium disilicate |
| title_full_unstemmed | Influence of substrate, cement and aging on the biaxial flexural strength of lithium disilicate |
| title_short | Influence of substrate, cement and aging on the biaxial flexural strength of lithium disilicate |
| title_sort | influence of substrate cement and aging on the biaxial flexural strength of lithium disilicate |
| url | https://ojs.ict.unesp.br/index.php/cob/article/view/3923 |
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