Cargando…
MICROHARDNESS OF COMPOSITE RESINS AT DIFFERENT DEPTHS VARYING THE POST-IRRADIATION TIME
OBJECTIVE: The purpose of this study was to assess the microhardness of posterior composite resins at different depths varying the post-irradiation time. MATERIALS AND METHODS: For each composite resin [Solitaire 2 (SO) - Heraus Kulzer, P60 (P) - 3M, Prodigy Condesable (PC) - Kerr, Surefil (S) - Den...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Faculdade de Odontologia de Bauru da Universidade de São Paulo
2007
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4327434/ https://www.ncbi.nlm.nih.gov/pubmed/19089149 http://dx.doi.org/10.1590/S1678-77572007000400012 |
_version_ | 1782357078362292224 |
---|---|
author | Ciccone-Nogueira, Juliane Cristina Borsatto, Mariana Cristina de Souza-Zaroni, Wanessa Christine Ramos, Renata Pereira Palma-Dibb, Regina Guenka |
author_facet | Ciccone-Nogueira, Juliane Cristina Borsatto, Mariana Cristina de Souza-Zaroni, Wanessa Christine Ramos, Renata Pereira Palma-Dibb, Regina Guenka |
author_sort | Ciccone-Nogueira, Juliane Cristina |
collection | PubMed |
description | OBJECTIVE: The purpose of this study was to assess the microhardness of posterior composite resins at different depths varying the post-irradiation time. MATERIALS AND METHODS: For each composite resin [Solitaire 2 (SO) - Heraus Kulzer, P60 (P) - 3M, Prodigy Condesable (PC) - Kerr, Surefil (S) - Dentsply and Alert (A) - Pentron], 6 specimens (3 mm in diameter; 4mm high) were prepared using a black polyurethane cylindrical matrix. The resins were inserted in a bulk increment and light cured for 40 seconds. Microhardness was analyzed at different depths (top, 0.4 mm, 1.0 mm, 2.0mm, 3.0 mm and 4.0 mm) and at two moments (20 minutes and 24 hours after light-curing). Data were analyzed by ANOVA and Tukey's test (p<0.05). RESULTS: Overall, microhardness means decreased significantly with the increase of depth, being lower in the first moment tested. P, S and PC showed the highest microhardness means. CONCLUSION: It may be concluded that the tested composite resins presented a gradual decrease of microhardness as depth increased and this drop was more accentuated for depths beyond 2 mm. For all materials, higher microhardness means were recorded 24 hours after light activation. P60 yielded the best results at the different depths evaluated. |
format | Online Article Text |
id | pubmed-4327434 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2007 |
publisher | Faculdade de Odontologia de Bauru da Universidade de São Paulo |
record_format | MEDLINE/PubMed |
spelling | pubmed-43274342015-04-16 MICROHARDNESS OF COMPOSITE RESINS AT DIFFERENT DEPTHS VARYING THE POST-IRRADIATION TIME Ciccone-Nogueira, Juliane Cristina Borsatto, Mariana Cristina de Souza-Zaroni, Wanessa Christine Ramos, Renata Pereira Palma-Dibb, Regina Guenka J Appl Oral Sci Original Article OBJECTIVE: The purpose of this study was to assess the microhardness of posterior composite resins at different depths varying the post-irradiation time. MATERIALS AND METHODS: For each composite resin [Solitaire 2 (SO) - Heraus Kulzer, P60 (P) - 3M, Prodigy Condesable (PC) - Kerr, Surefil (S) - Dentsply and Alert (A) - Pentron], 6 specimens (3 mm in diameter; 4mm high) were prepared using a black polyurethane cylindrical matrix. The resins were inserted in a bulk increment and light cured for 40 seconds. Microhardness was analyzed at different depths (top, 0.4 mm, 1.0 mm, 2.0mm, 3.0 mm and 4.0 mm) and at two moments (20 minutes and 24 hours after light-curing). Data were analyzed by ANOVA and Tukey's test (p<0.05). RESULTS: Overall, microhardness means decreased significantly with the increase of depth, being lower in the first moment tested. P, S and PC showed the highest microhardness means. CONCLUSION: It may be concluded that the tested composite resins presented a gradual decrease of microhardness as depth increased and this drop was more accentuated for depths beyond 2 mm. For all materials, higher microhardness means were recorded 24 hours after light activation. P60 yielded the best results at the different depths evaluated. Faculdade de Odontologia de Bauru da Universidade de São Paulo 2007-08 /pmc/articles/PMC4327434/ /pubmed/19089149 http://dx.doi.org/10.1590/S1678-77572007000400012 Text en http://creativecommons.org/licenses/by-nc/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Article Ciccone-Nogueira, Juliane Cristina Borsatto, Mariana Cristina de Souza-Zaroni, Wanessa Christine Ramos, Renata Pereira Palma-Dibb, Regina Guenka MICROHARDNESS OF COMPOSITE RESINS AT DIFFERENT DEPTHS VARYING THE POST-IRRADIATION TIME |
title | MICROHARDNESS OF COMPOSITE RESINS AT DIFFERENT DEPTHS VARYING THE POST-IRRADIATION TIME |
title_full | MICROHARDNESS OF COMPOSITE RESINS AT DIFFERENT DEPTHS VARYING THE POST-IRRADIATION TIME |
title_fullStr | MICROHARDNESS OF COMPOSITE RESINS AT DIFFERENT DEPTHS VARYING THE POST-IRRADIATION TIME |
title_full_unstemmed | MICROHARDNESS OF COMPOSITE RESINS AT DIFFERENT DEPTHS VARYING THE POST-IRRADIATION TIME |
title_short | MICROHARDNESS OF COMPOSITE RESINS AT DIFFERENT DEPTHS VARYING THE POST-IRRADIATION TIME |
title_sort | microhardness of composite resins at different depths varying the post-irradiation time |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4327434/ https://www.ncbi.nlm.nih.gov/pubmed/19089149 http://dx.doi.org/10.1590/S1678-77572007000400012 |
work_keys_str_mv | AT cicconenogueirajulianecristina microhardnessofcompositeresinsatdifferentdepthsvaryingthepostirradiationtime AT borsattomarianacristina microhardnessofcompositeresinsatdifferentdepthsvaryingthepostirradiationtime AT desouzazaroniwanessachristine microhardnessofcompositeresinsatdifferentdepthsvaryingthepostirradiationtime AT ramosrenatapereira microhardnessofcompositeresinsatdifferentdepthsvaryingthepostirradiationtime AT palmadibbreginaguenka microhardnessofcompositeresinsatdifferentdepthsvaryingthepostirradiationtime |