Influence of exposure to phosphoric and polyacrylic acids on selected microscopic and physical/chemical properties of calcium hydroxide cements
Purpose This study aimed to evaluate if the contact of calcium hydroxide cements with polyacrylic and phosphoric acids would alter selected microscopic and physical and chemical properties. Materials and Methods Chemically activated (Hydro C and Dycal Advanced Formula II) and resin-modified photoact...
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Istanbul University
2020-05-01
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| Series: | European Oral Research |
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| Online Access: | https://cdn.istanbul.edu.tr/file/JTA6CLJ8T5/B48346EFEB134312854C706D2F240576 |
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| author | Isabela Dantas Torres De Araújo Renato Barbosa Soares Camila Pessoa Lopes Isana Álvares Ferreira Boniek Castillo Dutra Borges |
| author_facet | Isabela Dantas Torres De Araújo Renato Barbosa Soares Camila Pessoa Lopes Isana Álvares Ferreira Boniek Castillo Dutra Borges |
| author_sort | Isabela Dantas Torres De Araújo |
| collection | DOAJ |
| description | Purpose This study aimed to evaluate if the contact of calcium hydroxide cements with polyacrylic and phosphoric acids would alter selected microscopic and physical and chemical properties. Materials and Methods Chemically activated (Hydro C and Dycal Advanced Formula II) and resin-modified photoactivated (Ultra-blend Plus) calcium hydroxide cements were examined after exposure to the following different strategies: contact with no substance (control group); rinsing with water and drying; contact with polyacrylic acid, rinsing with water, and drying; and contact with phosphoric acid, rinsing with water, and drying. Surface morphology, determined by scanning electron microscopy (SEM), water sorption and solubility, and the release of hydroxyl ions were evaluated. Results SEM showed a greater impact of the conditioning acids on the surface of the chemically activated cements. Ultra-blend Plus obtained the highest value of sorption (516.8 μg/mm3 ) and solubility (381.1 μg/mm3 ) and Hydro C had the lowest values 251.9 μg/mm3 and 206.3 μg/mm3 respectively. Considering the release of hydroxyl ions in comparison with time, Hydro C and Ultra-blend Plus presented significant statistical difference for polyacrylic and phosphoric acid subgroups. Conclusion Hydro C and Dycal presented intensification of surface irregularities after contact with conditioning acids. The chemically activated materials suffered a decrease in sorption and solubility. The action of the conditioning acids promotes greater increase of the release of hydroxyl ions for Hydro C and Dycal. |
| format | Article |
| id | doaj-art-e9640994893c4d47b5f8f09f055fa58f |
| institution | OA Journals |
| issn | 2651-2823 |
| language | English |
| publishDate | 2020-05-01 |
| publisher | Istanbul University |
| record_format | Article |
| series | European Oral Research |
| spelling | doaj-art-e9640994893c4d47b5f8f09f055fa58f2025-08-20T01:48:11ZengIstanbul UniversityEuropean Oral Research2651-28232020-05-01542697610.26650/eor.20200057123456Influence of exposure to phosphoric and polyacrylic acids on selected microscopic and physical/chemical properties of calcium hydroxide cementsIsabela Dantas Torres De Araújo0https://orcid.org/0000-0002-3946-9303Renato Barbosa Soares1https://orcid.org/0000-0003-2990-1593Camila Pessoa Lopes2https://orcid.org/0000-0002-1494-0867Isana Álvares Ferreira3https://orcid.org/0000-0002-0301-5692Boniek Castillo Dutra Borges4https://orcid.org/0000-0003-4313-5776Federal University of Rio Grande do Norte, Rio-Grande, BrazilFederal University of Rio Grande do Norte, Rio-Grande, BrazilFederal University of Rio Grande do Norte, Rio-Grande, BrazilFederal University of Rio Grande do Norte, Rio-Grande, BrazilFederal University of Rio Grande do Norte, Rio-Grande, BrazilPurpose This study aimed to evaluate if the contact of calcium hydroxide cements with polyacrylic and phosphoric acids would alter selected microscopic and physical and chemical properties. Materials and Methods Chemically activated (Hydro C and Dycal Advanced Formula II) and resin-modified photoactivated (Ultra-blend Plus) calcium hydroxide cements were examined after exposure to the following different strategies: contact with no substance (control group); rinsing with water and drying; contact with polyacrylic acid, rinsing with water, and drying; and contact with phosphoric acid, rinsing with water, and drying. Surface morphology, determined by scanning electron microscopy (SEM), water sorption and solubility, and the release of hydroxyl ions were evaluated. Results SEM showed a greater impact of the conditioning acids on the surface of the chemically activated cements. Ultra-blend Plus obtained the highest value of sorption (516.8 μg/mm3 ) and solubility (381.1 μg/mm3 ) and Hydro C had the lowest values 251.9 μg/mm3 and 206.3 μg/mm3 respectively. Considering the release of hydroxyl ions in comparison with time, Hydro C and Ultra-blend Plus presented significant statistical difference for polyacrylic and phosphoric acid subgroups. Conclusion Hydro C and Dycal presented intensification of surface irregularities after contact with conditioning acids. The chemically activated materials suffered a decrease in sorption and solubility. The action of the conditioning acids promotes greater increase of the release of hydroxyl ions for Hydro C and Dycal.https://cdn.istanbul.edu.tr/file/JTA6CLJ8T5/B48346EFEB134312854C706D2F240576calcium hydroxidehydrogen ion concentrationsolubilitysurface morphologywater absorption |
| spellingShingle | Isabela Dantas Torres De Araújo Renato Barbosa Soares Camila Pessoa Lopes Isana Álvares Ferreira Boniek Castillo Dutra Borges Influence of exposure to phosphoric and polyacrylic acids on selected microscopic and physical/chemical properties of calcium hydroxide cements European Oral Research calcium hydroxide hydrogen ion concentration solubility surface morphology water absorption |
| title | Influence of exposure to phosphoric and polyacrylic acids on selected microscopic and physical/chemical properties of calcium hydroxide cements |
| title_full | Influence of exposure to phosphoric and polyacrylic acids on selected microscopic and physical/chemical properties of calcium hydroxide cements |
| title_fullStr | Influence of exposure to phosphoric and polyacrylic acids on selected microscopic and physical/chemical properties of calcium hydroxide cements |
| title_full_unstemmed | Influence of exposure to phosphoric and polyacrylic acids on selected microscopic and physical/chemical properties of calcium hydroxide cements |
| title_short | Influence of exposure to phosphoric and polyacrylic acids on selected microscopic and physical/chemical properties of calcium hydroxide cements |
| title_sort | influence of exposure to phosphoric and polyacrylic acids on selected microscopic and physical chemical properties of calcium hydroxide cements |
| topic | calcium hydroxide hydrogen ion concentration solubility surface morphology water absorption |
| url | https://cdn.istanbul.edu.tr/file/JTA6CLJ8T5/B48346EFEB134312854C706D2F240576 |
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