Ultimate tensile strength and microhardness of glass ionomer materials
Objective: This study evaluated the ultimate tensile strength (UTS) and microhardness (µKH) of conventional (CO) and hybrid resin-modified glass ionomer (RM). Material and methods: Nine specimens to UTS and twelve for µKHN of glass ionomer materials were obtained using special molds. The materials...
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| Language: | English |
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Universidade Estadual Paulista
2014-01-01
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| Series: | Brazilian Dental Science |
| Online Access: | https://ojs.ict.unesp.br/index.php/cob/article/view/949 |
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| author | Paula Roberta Perondi Pedro Henrique Cabral Oliveira Alessandra Cassoni André Figueiredo Reis José Augusto Rodrigues |
| author_facet | Paula Roberta Perondi Pedro Henrique Cabral Oliveira Alessandra Cassoni André Figueiredo Reis José Augusto Rodrigues |
| author_sort | Paula Roberta Perondi |
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Objective: This study evaluated the ultimate tensile strength (UTS) and microhardness (µKH) of conventional (CO) and hybrid resin-modified glass ionomer (RM). Material and methods: Nine specimens to UTS and twelve for µKHN of glass ionomer materials were obtained using special molds. The materials were manipulated and CO groups were allowed to self-cure for five minutes and RM were subjected to light-activation as indicated by manufactures through a glass slide. All specimens were dark-stored in 100% relative humidity for 24h. For UTS test, specimens were tested in tension in a universal testing machine (crosshead speed of 1 mm/min) until failure. For µKHN test a Knoop diamond indenter was used to make five indentations in the upper/light irradiated surface of the specimens. UTS and µKHN data were submitted to one-way ANOVA, followed by Tukey’s test (?= 5%). Results: The results for UTS were: Ionomaster: 7.0 (±1.6)A; Maxxion R: 8.8 (±3.7)A Vidrion R: 8.8 (±3.9)A; ChemFil Rock: 10.7 (±4.6)AB; Vitremer: 13.1 (±3.3)BC; Vitrofil R: 14.9 (±7.8)CD; Ionoseal: 14.5 (±8.2)CD; Resiglass: 16.3 (±2.3)D. The results for µKH: Ionomaster: 24.3 (±6.6)B; Maxxion R: 17.7 (±4.7)A, Vidrion R: 31.0 (±9.4) B; ChemFil Rock: 31.1 (±8.5)B; Vitremer: 20.3 (±3.3)A; Vitrofil R: 16.5 (±5.1)A; Ionoseal: 13.1 (±8.5)A; Resiglass: 21.6 (±5.2)A. Conclusion: It was observed that the hybrid resin-modified ionomers generally have higher cohesive strength than conventional ones, but lower microhardness.
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| format | Article |
| id | doaj-art-15f35e7fe501417f8f3f7047a64b81f1 |
| institution | Kabale University |
| issn | 2178-6011 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Universidade Estadual Paulista |
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| series | Brazilian Dental Science |
| spelling | doaj-art-15f35e7fe501417f8f3f7047a64b81f12025-08-22T17:55:03ZengUniversidade Estadual PaulistaBrazilian Dental Science2178-60112014-01-0117110.14295/bds.2014.v17i1.949Ultimate tensile strength and microhardness of glass ionomer materialsPaula Roberta Perondi0Pedro Henrique Cabral Oliveira1Alessandra Cassoni2André Figueiredo Reis3José Augusto Rodrigues4M.Sc., Camilo Castelo Branco University - Department of Restorative Dentistry. Carolina Fonseca, 584 São Paulo – SP, Brazil - CEP: 08230-030, Phone (Fax): 55(11) 2070-0000M.Sc. student, Guarulhos University – UnG, Department of Restorative Dentistry - Dental Research Division. Praça Teresa Cristina, 229, Centro - Guarulhos - SP, Brazil - CEP 07023-070, Phone (Fax): 55(11) 2087-3594Ph.D., Guarulhos University – UnG, Department of Restorative Dentistry - Dental Research Division. Praça Teresa Cristina, 229, Centro - Guarulhos - SP, Brazil - CEP 07023-070, Phone (Fax): 55(11) 2087-3594Ph.D., Guarulhos University – UnG, Department of Restorative Dentistry - Dental Research Division. Praça Teresa Cristina, 229, Centro - Guarulhos - SP, Brazil - CEP 07023-070, Phone (Fax): 55(11) 2087-3594Ph.D., Guarulhos University – UnG, Department of Restorative Dentistry - Dental Research Division. Praça Teresa Cristina, 229, Centro - Guarulhos - SP, Brazil - CEP 07023-070, Phone (Fax): 55(11) 2087-3594 Objective: This study evaluated the ultimate tensile strength (UTS) and microhardness (µKH) of conventional (CO) and hybrid resin-modified glass ionomer (RM). Material and methods: Nine specimens to UTS and twelve for µKHN of glass ionomer materials were obtained using special molds. The materials were manipulated and CO groups were allowed to self-cure for five minutes and RM were subjected to light-activation as indicated by manufactures through a glass slide. All specimens were dark-stored in 100% relative humidity for 24h. For UTS test, specimens were tested in tension in a universal testing machine (crosshead speed of 1 mm/min) until failure. For µKHN test a Knoop diamond indenter was used to make five indentations in the upper/light irradiated surface of the specimens. UTS and µKHN data were submitted to one-way ANOVA, followed by Tukey’s test (?= 5%). Results: The results for UTS were: Ionomaster: 7.0 (±1.6)A; Maxxion R: 8.8 (±3.7)A Vidrion R: 8.8 (±3.9)A; ChemFil Rock: 10.7 (±4.6)AB; Vitremer: 13.1 (±3.3)BC; Vitrofil R: 14.9 (±7.8)CD; Ionoseal: 14.5 (±8.2)CD; Resiglass: 16.3 (±2.3)D. The results for µKH: Ionomaster: 24.3 (±6.6)B; Maxxion R: 17.7 (±4.7)A, Vidrion R: 31.0 (±9.4) B; ChemFil Rock: 31.1 (±8.5)B; Vitremer: 20.3 (±3.3)A; Vitrofil R: 16.5 (±5.1)A; Ionoseal: 13.1 (±8.5)A; Resiglass: 21.6 (±5.2)A. Conclusion: It was observed that the hybrid resin-modified ionomers generally have higher cohesive strength than conventional ones, but lower microhardness. https://ojs.ict.unesp.br/index.php/cob/article/view/949 |
| spellingShingle | Paula Roberta Perondi Pedro Henrique Cabral Oliveira Alessandra Cassoni André Figueiredo Reis José Augusto Rodrigues Ultimate tensile strength and microhardness of glass ionomer materials Brazilian Dental Science |
| title | Ultimate tensile strength and microhardness of glass ionomer materials |
| title_full | Ultimate tensile strength and microhardness of glass ionomer materials |
| title_fullStr | Ultimate tensile strength and microhardness of glass ionomer materials |
| title_full_unstemmed | Ultimate tensile strength and microhardness of glass ionomer materials |
| title_short | Ultimate tensile strength and microhardness of glass ionomer materials |
| title_sort | ultimate tensile strength and microhardness of glass ionomer materials |
| url | https://ojs.ict.unesp.br/index.php/cob/article/view/949 |
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