Cerium Dioxide Particles to Tune Radiopacity of Dental Adhesives: Microstructural and Physico-Chemical Evaluation
The insufficient radiopacity of dental adhesives applied under composite restorations makes the radiographic diagnosis of recurrent caries challenging. Consequently, the misdiagnosis may lead to unnecessary replacement of restorations. The aims of this study were to formulate experimental dental adh...
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MDPI AG
2020-02-01
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| Series: | Journal of Functional Biomaterials |
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| Online Access: | https://www.mdpi.com/2079-4983/11/1/7 |
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| author | Isadora Martini Garcia Vicente Castelo Branco Leitune Antonio Shigueaki Takimi Carlos Pérez Bergmann Susana Maria Werner Samuel Mary Anne Melo Fabrício Mezzomo Collares |
| author_facet | Isadora Martini Garcia Vicente Castelo Branco Leitune Antonio Shigueaki Takimi Carlos Pérez Bergmann Susana Maria Werner Samuel Mary Anne Melo Fabrício Mezzomo Collares |
| author_sort | Isadora Martini Garcia |
| collection | DOAJ |
| description | The insufficient radiopacity of dental adhesives applied under composite restorations makes the radiographic diagnosis of recurrent caries challenging. Consequently, the misdiagnosis may lead to unnecessary replacement of restorations. The aims of this study were to formulate experimental dental adhesives containing cerium dioxide (CeO<sub>2</sub>) and investigate the effects of different loadings of CeO<sub>2</sub> on their radiopacity and degree of conversion for the first time.<b> </b>CeO<sub>2</sub> was characterized by X-ray diffraction analysis, Fourier transforms infrared spectroscopy, and laser diffraction for particle size analysis. Experimental dental adhesives were formulated with CeO<sub>2</sub> as the inorganic filler with loadings ranging from 0.36 to 5.76 vol.%. The unfilled adhesive was used as a control. The studied adhesives were evaluated for dispersion of CeO<sub>2</sub> in the polymerized samples<sub>,</sub> degree of conversion, and radiopacity. CeO<sub>2</sub> presented a monoclinic crystalline phase, peaks related to Ce-O bonding, and an average particle size of around 16 µm. CeO<sub>2 </sub>was dispersed in the adhesive, and the addition of these particles increased the adhesives’ radiopacity (<i>p</i> < 0.05). There was a significant decrease in the degree of conversion with CeO<sub>2</sub> loadings higher than 1.44 vol.%. However, all materials showed a similar degree of conversion in comparison to commercially available adhesives. CeO<sub>2</sub> particles were investigated for the first time as a promising compound to improve the radiopacity of the dental adhesives. |
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| language | English |
| last_indexed | 2024-04-13T00:32:25Z |
| publishDate | 2020-02-01 |
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| series | Journal of Functional Biomaterials |
| spelling | doaj.art-6d8efdaf821c4cbfb49dfc761e6766f22022-12-22T03:10:26ZengMDPI AGJournal of Functional Biomaterials2079-49832020-02-01111710.3390/jfb11010007jfb11010007Cerium Dioxide Particles to Tune Radiopacity of Dental Adhesives: Microstructural and Physico-Chemical EvaluationIsadora Martini Garcia0Vicente Castelo Branco Leitune1Antonio Shigueaki Takimi2Carlos Pérez Bergmann3Susana Maria Werner Samuel4Mary Anne Melo5Fabrício Mezzomo Collares6Dental Materials Laboratory, School of Dentistry, Federal University of Rio Grande do Sul, Rua Ramiro Barcelos 2492, Rio Branco, Porto Alegre, RS 90035-003, BrazilDental Materials Laboratory, School of Dentistry, Federal University of Rio Grande do Sul, Rua Ramiro Barcelos 2492, Rio Branco, Porto Alegre, RS 90035-003, BrazilLaboratory for Electrochemical Processes and Corrosion, Engineering School, Federal University of Rio Grande do Sul, Bento Gonçalves, 9500, Prédio 43427, Sala 216, Porto Alegre, RS 91501-970, BrazilLaboratory of Ceramic Materials, Federal University of Rio Grande do Sul, Avenida Osvaldo Aranha 99, Porto Alegre, RS 90035-003, BrazilDental Materials Laboratory, School of Dentistry, Federal University of Rio Grande do Sul, Rua Ramiro Barcelos 2492, Rio Branco, Porto Alegre, RS 90035-003, BrazilDivision of Operative Dentistry, Department of General Dentistry, University of Maryland School of Dentistry, Baltimore, MD 21201, USADental Materials Laboratory, School of Dentistry, Federal University of Rio Grande do Sul, Rua Ramiro Barcelos 2492, Rio Branco, Porto Alegre, RS 90035-003, BrazilThe insufficient radiopacity of dental adhesives applied under composite restorations makes the radiographic diagnosis of recurrent caries challenging. Consequently, the misdiagnosis may lead to unnecessary replacement of restorations. The aims of this study were to formulate experimental dental adhesives containing cerium dioxide (CeO<sub>2</sub>) and investigate the effects of different loadings of CeO<sub>2</sub> on their radiopacity and degree of conversion for the first time.<b> </b>CeO<sub>2</sub> was characterized by X-ray diffraction analysis, Fourier transforms infrared spectroscopy, and laser diffraction for particle size analysis. Experimental dental adhesives were formulated with CeO<sub>2</sub> as the inorganic filler with loadings ranging from 0.36 to 5.76 vol.%. The unfilled adhesive was used as a control. The studied adhesives were evaluated for dispersion of CeO<sub>2</sub> in the polymerized samples<sub>,</sub> degree of conversion, and radiopacity. CeO<sub>2</sub> presented a monoclinic crystalline phase, peaks related to Ce-O bonding, and an average particle size of around 16 µm. CeO<sub>2 </sub>was dispersed in the adhesive, and the addition of these particles increased the adhesives’ radiopacity (<i>p</i> < 0.05). There was a significant decrease in the degree of conversion with CeO<sub>2</sub> loadings higher than 1.44 vol.%. However, all materials showed a similar degree of conversion in comparison to commercially available adhesives. CeO<sub>2</sub> particles were investigated for the first time as a promising compound to improve the radiopacity of the dental adhesives.https://www.mdpi.com/2079-4983/11/1/7dental materialsdentistryadhesiveslight-curing of dental adhesivescomposite resinsmethylmethacrylateoxidesceriumpolymersdentine bonding agents |
| spellingShingle | Isadora Martini Garcia Vicente Castelo Branco Leitune Antonio Shigueaki Takimi Carlos Pérez Bergmann Susana Maria Werner Samuel Mary Anne Melo Fabrício Mezzomo Collares Cerium Dioxide Particles to Tune Radiopacity of Dental Adhesives: Microstructural and Physico-Chemical Evaluation Journal of Functional Biomaterials dental materials dentistry adhesives light-curing of dental adhesives composite resins methylmethacrylate oxides cerium polymers dentine bonding agents |
| title | Cerium Dioxide Particles to Tune Radiopacity of Dental Adhesives: Microstructural and Physico-Chemical Evaluation |
| title_full | Cerium Dioxide Particles to Tune Radiopacity of Dental Adhesives: Microstructural and Physico-Chemical Evaluation |
| title_fullStr | Cerium Dioxide Particles to Tune Radiopacity of Dental Adhesives: Microstructural and Physico-Chemical Evaluation |
| title_full_unstemmed | Cerium Dioxide Particles to Tune Radiopacity of Dental Adhesives: Microstructural and Physico-Chemical Evaluation |
| title_short | Cerium Dioxide Particles to Tune Radiopacity of Dental Adhesives: Microstructural and Physico-Chemical Evaluation |
| title_sort | cerium dioxide particles to tune radiopacity of dental adhesives microstructural and physico chemical evaluation |
| topic | dental materials dentistry adhesives light-curing of dental adhesives composite resins methylmethacrylate oxides cerium polymers dentine bonding agents |
| url | https://www.mdpi.com/2079-4983/11/1/7 |
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