Effect of Camphorquinone Concentration in Physical-Mechanical Properties of Experimental Flowable Resin Composites
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNIFESP |
Texto Completo: | https://repositorio.unifesp.br/handle/11600/54311 http://dx.doi.org/10.1155/2018/7921247 |
Resumo: | The aim of this study was to evaluate the effect of camphorquinone concentration in physical-mechanical properties of experimental flowable composites in order to find the concentration that results in maximum conversion, balanced mechanical strength, and minimum shrinkage stress. Model composites based on BISGMA/TEGDMA with 70% wt filler loading were prepared containing different concentrations of camphorquinone (CQ) on resin matrix (0.25%, 0.50%, 1%, 1.50%, and 2% by weight). Degree of conversion was determined by FTIR. Surface hardness was assessed before and after 24 h ethanol storage and softening rate was determined. Depth of cure was determined by Knoop hardness evaluation at different depths. Color was assessed by reflectance spectrophotometer, employing the CIE-Lab system. Flexural strength and elastic modulus were determined by a three-point bending test. Shrinkage stress was determined in a Universal Testing Machine in a high compliance system. Data were submitted to ANOVA and Tukey's test (alpha = 0.05). The increase in CQ concentration caused a significant increase on flexural strength and luminosity of composites. Surface hardness was not affected by the concentration of CQ. Composite containing 0.25% wt CQ showed lower elastic modulus and shrinkage stress when compared to others. Depth of cure was 3 mm for composite containing 1% CQ and 2 mm for the other tested composites. Degree of conversion was inversely correlated with softening rate and directly correlated with elastic modulus and shrinkage stress. In conclusion, CQ concentration affects polymerization characteristics and mechanical strength of composites. The concentration of CQ in flowable composite for optimized polymerization and properties was 1% wt of the resin matrix, which allows adequate balance among degree of conversion, depth of cure, mechanical properties, and color characteristics of these materials. |
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Alves Maciel, Dayany da Silva [UNIFESP]Caires-Filho, Arnaldo BonfimFernandez-Garcia, MartaAnauate-Netto, CamilloBruschi Alonso, Roberta Caroline2020-07-08T13:09:56Z2020-07-08T13:09:56Z2018Biomed Research International. London, v. , p. -, 2018.2314-6133https://repositorio.unifesp.br/handle/11600/54311http://dx.doi.org/10.1155/2018/7921247WOS000432527700001.pdf10.1155/2018/7921247WOS:000432527700001The aim of this study was to evaluate the effect of camphorquinone concentration in physical-mechanical properties of experimental flowable composites in order to find the concentration that results in maximum conversion, balanced mechanical strength, and minimum shrinkage stress. Model composites based on BISGMA/TEGDMA with 70% wt filler loading were prepared containing different concentrations of camphorquinone (CQ) on resin matrix (0.25%, 0.50%, 1%, 1.50%, and 2% by weight). Degree of conversion was determined by FTIR. Surface hardness was assessed before and after 24 h ethanol storage and softening rate was determined. Depth of cure was determined by Knoop hardness evaluation at different depths. Color was assessed by reflectance spectrophotometer, employing the CIE-Lab system. Flexural strength and elastic modulus were determined by a three-point bending test. Shrinkage stress was determined in a Universal Testing Machine in a high compliance system. Data were submitted to ANOVA and Tukey's test (alpha = 0.05). The increase in CQ concentration caused a significant increase on flexural strength and luminosity of composites. Surface hardness was not affected by the concentration of CQ. Composite containing 0.25% wt CQ showed lower elastic modulus and shrinkage stress when compared to others. Depth of cure was 3 mm for composite containing 1% CQ and 2 mm for the other tested composites. Degree of conversion was inversely correlated with softening rate and directly correlated with elastic modulus and shrinkage stress. In conclusion, CQ concentration affects polymerization characteristics and mechanical strength of composites. The concentration of CQ in flowable composite for optimized polymerization and properties was 1% wt of the resin matrix, which allows adequate balance among degree of conversion, depth of cure, mechanical properties, and color characteristics of these materials.Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)Univ Fed Sao Paulo, Inst Ciencias Ambientais Quim & Farmaceut, Diadema, SP, BrazilUniv Anhanguera Sao Paulo UNIAN, Sao Paulo, SP, BrazilCSIC, ICTP, Madrid, SpainUniv Metropolitana Santos UNIMES, Santos, SP, BrazilUniv Mogi das Cruzes, NPT, Mogi das Cruzes, SP, BrazilUniv Fed Sao Paulo, Inst Ciencias Ambientais Quim & Farmaceut, Diadema, SP, BrazilFAPESP: 2015/16569-8Web of Science-engHindawi LtdBiomed Research InternationalEffect of Camphorquinone Concentration in Physical-Mechanical Properties of Experimental Flowable Resin Compositesinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleLondoninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UNIFESPinstname:Universidade Federal de São Paulo (UNIFESP)instacron:UNIFESPORIGINALWOS000432527700001.pdfapplication/pdf1659927${dspace.ui.url}/bitstream/11600/54311/1/WOS000432527700001.pdfd2f10de818a5a22ca5e3dd7511041dd8MD51open accessTEXTWOS000432527700001.pdf.txtWOS000432527700001.pdf.txtExtracted texttext/plain52086${dspace.ui.url}/bitstream/11600/54311/8/WOS000432527700001.pdf.txt5bb0fa84dd58cdc1d4e9208f482e1945MD58open accessTHUMBNAILWOS000432527700001.pdf.jpgWOS000432527700001.pdf.jpgIM Thumbnailimage/jpeg6237${dspace.ui.url}/bitstream/11600/54311/10/WOS000432527700001.pdf.jpgf52b23a55edabd310b55447b31f9bcb9MD510open access11600/543112023-06-05 19:21:46.581open accessoai:repositorio.unifesp.br:11600/54311Repositório InstitucionalPUBhttp://www.repositorio.unifesp.br/oai/requestopendoar:34652023-06-05T22:21:46Repositório Institucional da UNIFESP - Universidade Federal de São Paulo (UNIFESP)false |
dc.title.en.fl_str_mv |
Effect of Camphorquinone Concentration in Physical-Mechanical Properties of Experimental Flowable Resin Composites |
title |
Effect of Camphorquinone Concentration in Physical-Mechanical Properties of Experimental Flowable Resin Composites |
spellingShingle |
Effect of Camphorquinone Concentration in Physical-Mechanical Properties of Experimental Flowable Resin Composites Alves Maciel, Dayany da Silva [UNIFESP] |
title_short |
Effect of Camphorquinone Concentration in Physical-Mechanical Properties of Experimental Flowable Resin Composites |
title_full |
Effect of Camphorquinone Concentration in Physical-Mechanical Properties of Experimental Flowable Resin Composites |
title_fullStr |
Effect of Camphorquinone Concentration in Physical-Mechanical Properties of Experimental Flowable Resin Composites |
title_full_unstemmed |
Effect of Camphorquinone Concentration in Physical-Mechanical Properties of Experimental Flowable Resin Composites |
title_sort |
Effect of Camphorquinone Concentration in Physical-Mechanical Properties of Experimental Flowable Resin Composites |
author |
Alves Maciel, Dayany da Silva [UNIFESP] |
author_facet |
Alves Maciel, Dayany da Silva [UNIFESP] Caires-Filho, Arnaldo Bonfim Fernandez-Garcia, Marta Anauate-Netto, Camillo Bruschi Alonso, Roberta Caroline |
author_role |
author |
author2 |
Caires-Filho, Arnaldo Bonfim Fernandez-Garcia, Marta Anauate-Netto, Camillo Bruschi Alonso, Roberta Caroline |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Alves Maciel, Dayany da Silva [UNIFESP] Caires-Filho, Arnaldo Bonfim Fernandez-Garcia, Marta Anauate-Netto, Camillo Bruschi Alonso, Roberta Caroline |
description |
The aim of this study was to evaluate the effect of camphorquinone concentration in physical-mechanical properties of experimental flowable composites in order to find the concentration that results in maximum conversion, balanced mechanical strength, and minimum shrinkage stress. Model composites based on BISGMA/TEGDMA with 70% wt filler loading were prepared containing different concentrations of camphorquinone (CQ) on resin matrix (0.25%, 0.50%, 1%, 1.50%, and 2% by weight). Degree of conversion was determined by FTIR. Surface hardness was assessed before and after 24 h ethanol storage and softening rate was determined. Depth of cure was determined by Knoop hardness evaluation at different depths. Color was assessed by reflectance spectrophotometer, employing the CIE-Lab system. Flexural strength and elastic modulus were determined by a three-point bending test. Shrinkage stress was determined in a Universal Testing Machine in a high compliance system. Data were submitted to ANOVA and Tukey's test (alpha = 0.05). The increase in CQ concentration caused a significant increase on flexural strength and luminosity of composites. Surface hardness was not affected by the concentration of CQ. Composite containing 0.25% wt CQ showed lower elastic modulus and shrinkage stress when compared to others. Depth of cure was 3 mm for composite containing 1% CQ and 2 mm for the other tested composites. Degree of conversion was inversely correlated with softening rate and directly correlated with elastic modulus and shrinkage stress. In conclusion, CQ concentration affects polymerization characteristics and mechanical strength of composites. The concentration of CQ in flowable composite for optimized polymerization and properties was 1% wt of the resin matrix, which allows adequate balance among degree of conversion, depth of cure, mechanical properties, and color characteristics of these materials. |
publishDate |
2018 |
dc.date.issued.fl_str_mv |
2018 |
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2020-07-08T13:09:56Z |
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2020-07-08T13:09:56Z |
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article |
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publishedVersion |
dc.identifier.citation.fl_str_mv |
Biomed Research International. London, v. , p. -, 2018. |
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https://repositorio.unifesp.br/handle/11600/54311 http://dx.doi.org/10.1155/2018/7921247 |
dc.identifier.issn.none.fl_str_mv |
2314-6133 |
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WOS000432527700001.pdf |
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10.1155/2018/7921247 |
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Biomed Research International. London, v. , p. -, 2018. 2314-6133 WOS000432527700001.pdf 10.1155/2018/7921247 WOS:000432527700001 |
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https://repositorio.unifesp.br/handle/11600/54311 http://dx.doi.org/10.1155/2018/7921247 |
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