Thermocycling effect on microhardness of laboratory composite resins
The aim of this study was to evaluate the thermocycling effect on microhardness of laboratory composite resins. 30 disks were fabricated, 5 mm of diameter and 2mm of width, using 3 laboratory resins: G1 (n=10) - RESILAB MASTER (Wilcos-Brasil), G2 (n=10) - Vita VMLC (VITA Zahnfabrik-Germany), and G3...
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| Format: | Article |
| Language: | English |
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Universidade Estadual de Campinas
2016-01-01
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| Series: | Brazilian Journal of Oral Sciences |
| Subjects: | |
| Online Access: | https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8642994 |
| _version_ | 1819350026755768320 |
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| author | Sarina Maciel Braga Pereira Anderson Almeida Castilho Susana María Salazar-Marocho Karla Mychellyne Costa Oliveira Vanessa Zulema Ccahuana Váquez Marco Antonio Bottino |
| author_facet | Sarina Maciel Braga Pereira Anderson Almeida Castilho Susana María Salazar-Marocho Karla Mychellyne Costa Oliveira Vanessa Zulema Ccahuana Váquez Marco Antonio Bottino |
| author_sort | Sarina Maciel Braga Pereira |
| collection | DOAJ |
| description | The aim of this study was to evaluate the thermocycling effect on microhardness of laboratory composite resins. 30 disks were fabricated, 5 mm of diameter and 2mm of width, using 3 laboratory resins: G1 (n=10) - RESILAB MASTER (Wilcos-Brasil), G2 (n=10) - Vita VMLC (VITA Zahnfabrik-Germany), and G3 (n=10) - Vita Zeta (VITA Zahnfabrik-Germany). Vickers microhardness (HV) of all specimens was evaluated using a microhardness tester FM-700 (Future Tech- 50 g/10s). The specimens were measured before and after the thermocycling (3.000 times and 12.000 times - 5° /55°C±1). The microhardness values before cycling were (mean±SD): G1: 55.50±4.6; G2: 35.54±2.5; G3: 27.97±1.6.; after 3.000 thermocycles: G1: 55.54±3,9; G2: 29.92±2,73; G3:21.01±1.4 and after 12.000 cycles G1:54.27±3.2; G2: 30.91±1.6. G3: 23.81±0.9. Variance analysis (ANOVA) and Tukey’s test was accomplished (p<0,05), the highest microhardness values were observed in G1; G2 and G3 showed reduction of microhardness values. It was concluded that, after thermocycling, the tested laboratory composites resins are susceptible to the decrease of surface microhardness. |
| first_indexed | 2024-12-24T19:09:53Z |
| format | Article |
| id | doaj.art-197f94cc6fa94a389544aafab8c62054 |
| institution | Directory Open Access Journal |
| issn | 1677-3225 |
| language | English |
| last_indexed | 2024-12-24T19:09:53Z |
| publishDate | 2016-01-01 |
| publisher | Universidade Estadual de Campinas |
| record_format | Article |
| series | Brazilian Journal of Oral Sciences |
| spelling | doaj.art-197f94cc6fa94a389544aafab8c620542022-12-21T16:43:01ZengUniversidade Estadual de CampinasBrazilian Journal of Oral Sciences1677-32252016-01-0162210.20396/bjos.v6i22.8642994Thermocycling effect on microhardness of laboratory composite resinsSarina Maciel Braga Pereira0Anderson Almeida Castilho1Susana María Salazar-Marocho2Karla Mychellyne Costa Oliveira3Vanessa Zulema Ccahuana VáquezMarco Antonio Bottino4Paulista State University/São José dos CamposPaulista State University/São José dos Campos,Paulista State University/São José dos CamposPaulista State University/São José dos CamposPaulista State University, São José dos CamposThe aim of this study was to evaluate the thermocycling effect on microhardness of laboratory composite resins. 30 disks were fabricated, 5 mm of diameter and 2mm of width, using 3 laboratory resins: G1 (n=10) - RESILAB MASTER (Wilcos-Brasil), G2 (n=10) - Vita VMLC (VITA Zahnfabrik-Germany), and G3 (n=10) - Vita Zeta (VITA Zahnfabrik-Germany). Vickers microhardness (HV) of all specimens was evaluated using a microhardness tester FM-700 (Future Tech- 50 g/10s). The specimens were measured before and after the thermocycling (3.000 times and 12.000 times - 5° /55°C±1). The microhardness values before cycling were (mean±SD): G1: 55.50±4.6; G2: 35.54±2.5; G3: 27.97±1.6.; after 3.000 thermocycles: G1: 55.54±3,9; G2: 29.92±2,73; G3:21.01±1.4 and after 12.000 cycles G1:54.27±3.2; G2: 30.91±1.6. G3: 23.81±0.9. Variance analysis (ANOVA) and Tukey’s test was accomplished (p<0,05), the highest microhardness values were observed in G1; G2 and G3 showed reduction of microhardness values. It was concluded that, after thermocycling, the tested laboratory composites resins are susceptible to the decrease of surface microhardness.https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8642994Composite resins. Microhardness. Thermocycling |
| spellingShingle | Sarina Maciel Braga Pereira Anderson Almeida Castilho Susana María Salazar-Marocho Karla Mychellyne Costa Oliveira Vanessa Zulema Ccahuana Váquez Marco Antonio Bottino Thermocycling effect on microhardness of laboratory composite resins Brazilian Journal of Oral Sciences Composite resins. Microhardness. Thermocycling |
| title | Thermocycling effect on microhardness of laboratory composite resins |
| title_full | Thermocycling effect on microhardness of laboratory composite resins |
| title_fullStr | Thermocycling effect on microhardness of laboratory composite resins |
| title_full_unstemmed | Thermocycling effect on microhardness of laboratory composite resins |
| title_short | Thermocycling effect on microhardness of laboratory composite resins |
| title_sort | thermocycling effect on microhardness of laboratory composite resins |
| topic | Composite resins. Microhardness. Thermocycling |
| url | https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8642994 |
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