Formulation and Characterization of Experimental Adhesive Systems Charged with Different Concentrations of Nanofillers: Physicomechanical Properties and Marginal Gap Formation
This study aimed to formulate and characterize experimental dental adhesives charged with different concentrations of nanofillers. Different concentrations (0, 7.5 wt%, and 15 wt%) of nanosized silica (50 nm) were added to the bond of a two-bottle experimental etch-and-rinse adhesive system (EA0, EA...
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MDPI AG
2024-02-01
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| Online Access: | https://www.mdpi.com/2076-3417/14/5/2057 |
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| author | Camila Rodrigues Paiva Correia Laiza Tatiana Poskus José Guilherme Antunes Guimarães Alice Gonçalves Penelas Cristiane Mariote Amaral Rayane Fernandes da Silva Machado Eduardo Moreira da Silva |
| author_facet | Camila Rodrigues Paiva Correia Laiza Tatiana Poskus José Guilherme Antunes Guimarães Alice Gonçalves Penelas Cristiane Mariote Amaral Rayane Fernandes da Silva Machado Eduardo Moreira da Silva |
| author_sort | Camila Rodrigues Paiva Correia |
| collection | DOAJ |
| description | This study aimed to formulate and characterize experimental dental adhesives charged with different concentrations of nanofillers. Different concentrations (0, 7.5 wt%, and 15 wt%) of nanosized silica (50 nm) were added to the bond of a two-bottle experimental etch-and-rinse adhesive system (EA0, EA7.5, and EA15). The following physicomechanical properties were evaluated: degree of conversion (DC%), ultimate tensile strength (UTS), flexural strength (FS), static modulus of elasticity (SME), dynamic modulus of elasticity (DME), and glass transition temperature (Tg). Marginal integrity (%MG) was evaluated in standardized class I cavities hybridized with the EAs and restored using two dental composites (CON-conventional and OBF-bulk-fill): EA0CON, EA7.5CON, EA15CON, EA0OBF, EA7.5OBF, and EA15OBF. Gap formation was measured in the occlusal and mesial tooth-restoration interfaces using a 3D laser confocal microscope. Microtensile bond strength (µTBS) was evaluated using dentin-composite beams (1 × 1 mm) obtained from restorations. Data were submitted to ANOVA and Tukey’s test (α = 0.05). For DC% and Tg, EA15 < EA0 = EA7.5 (<i>p</i> < 0.05). For UTS, EA0 < EA7.5 < EA15. For FS, SME, and DME, EA0 < EA7.5 = EA15 (<i>p</i> < 0.05). For the gap formation analysis, there were statistical differences only for the conventional composite (EA0CON > EA7.5CON = EA15CON). The lowest values (<i>p</i> < 0.05) of µTBS were observed for the groups restored with EAs without inorganic content. In conclusion, charging dental adhesives with nanofillers may be a suitable strategy for improving their properties as well as their interaction with dental substrates. |
| first_indexed | 2024-04-25T00:34:38Z |
| format | Article |
| id | doaj.art-b416da348a1a44e9a02a672a1969aec1 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-04-25T00:34:38Z |
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| spelling | doaj.art-b416da348a1a44e9a02a672a1969aec12024-03-12T16:39:58ZengMDPI AGApplied Sciences2076-34172024-02-01145205710.3390/app14052057Formulation and Characterization of Experimental Adhesive Systems Charged with Different Concentrations of Nanofillers: Physicomechanical Properties and Marginal Gap FormationCamila Rodrigues Paiva Correia0Laiza Tatiana Poskus1José Guilherme Antunes Guimarães2Alice Gonçalves Penelas3Cristiane Mariote Amaral4Rayane Fernandes da Silva Machado5Eduardo Moreira da Silva6Analytical Laboratory of Restorative Biomaterials-LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói 24210-240, BrazilAnalytical Laboratory of Restorative Biomaterials-LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói 24210-240, BrazilAnalytical Laboratory of Restorative Biomaterials-LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói 24210-240, BrazilAnalytical Laboratory of Restorative Biomaterials-LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói 24210-240, BrazilAnalytical Laboratory of Restorative Biomaterials-LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói 24210-240, BrazilAnalytical Laboratory of Restorative Biomaterials-LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói 24210-240, BrazilAnalytical Laboratory of Restorative Biomaterials-LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói 24210-240, BrazilThis study aimed to formulate and characterize experimental dental adhesives charged with different concentrations of nanofillers. Different concentrations (0, 7.5 wt%, and 15 wt%) of nanosized silica (50 nm) were added to the bond of a two-bottle experimental etch-and-rinse adhesive system (EA0, EA7.5, and EA15). The following physicomechanical properties were evaluated: degree of conversion (DC%), ultimate tensile strength (UTS), flexural strength (FS), static modulus of elasticity (SME), dynamic modulus of elasticity (DME), and glass transition temperature (Tg). Marginal integrity (%MG) was evaluated in standardized class I cavities hybridized with the EAs and restored using two dental composites (CON-conventional and OBF-bulk-fill): EA0CON, EA7.5CON, EA15CON, EA0OBF, EA7.5OBF, and EA15OBF. Gap formation was measured in the occlusal and mesial tooth-restoration interfaces using a 3D laser confocal microscope. Microtensile bond strength (µTBS) was evaluated using dentin-composite beams (1 × 1 mm) obtained from restorations. Data were submitted to ANOVA and Tukey’s test (α = 0.05). For DC% and Tg, EA15 < EA0 = EA7.5 (<i>p</i> < 0.05). For UTS, EA0 < EA7.5 < EA15. For FS, SME, and DME, EA0 < EA7.5 = EA15 (<i>p</i> < 0.05). For the gap formation analysis, there were statistical differences only for the conventional composite (EA0CON > EA7.5CON = EA15CON). The lowest values (<i>p</i> < 0.05) of µTBS were observed for the groups restored with EAs without inorganic content. In conclusion, charging dental adhesives with nanofillers may be a suitable strategy for improving their properties as well as their interaction with dental substrates.https://www.mdpi.com/2076-3417/14/5/2057dental adhesivesinorganic fillermechanical propertiesmarginal gapsbond strength |
| spellingShingle | Camila Rodrigues Paiva Correia Laiza Tatiana Poskus José Guilherme Antunes Guimarães Alice Gonçalves Penelas Cristiane Mariote Amaral Rayane Fernandes da Silva Machado Eduardo Moreira da Silva Formulation and Characterization of Experimental Adhesive Systems Charged with Different Concentrations of Nanofillers: Physicomechanical Properties and Marginal Gap Formation Applied Sciences dental adhesives inorganic filler mechanical properties marginal gaps bond strength |
| title | Formulation and Characterization of Experimental Adhesive Systems Charged with Different Concentrations of Nanofillers: Physicomechanical Properties and Marginal Gap Formation |
| title_full | Formulation and Characterization of Experimental Adhesive Systems Charged with Different Concentrations of Nanofillers: Physicomechanical Properties and Marginal Gap Formation |
| title_fullStr | Formulation and Characterization of Experimental Adhesive Systems Charged with Different Concentrations of Nanofillers: Physicomechanical Properties and Marginal Gap Formation |
| title_full_unstemmed | Formulation and Characterization of Experimental Adhesive Systems Charged with Different Concentrations of Nanofillers: Physicomechanical Properties and Marginal Gap Formation |
| title_short | Formulation and Characterization of Experimental Adhesive Systems Charged with Different Concentrations of Nanofillers: Physicomechanical Properties and Marginal Gap Formation |
| title_sort | formulation and characterization of experimental adhesive systems charged with different concentrations of nanofillers physicomechanical properties and marginal gap formation |
| topic | dental adhesives inorganic filler mechanical properties marginal gaps bond strength |
| url | https://www.mdpi.com/2076-3417/14/5/2057 |
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