Relationship between Reflectivity, Chemical Composition and Mechanical Behaviour of Orthodontic Bonding Nanofiller Resin Materials: A Proposal of an Alternative Method of Investigation

Roberta Condò; Gianluca Mampieri; Alessandro Cioffi; Paola Pirelli; Aldo Giancotti; Luca Maiolo; Francesco Maita; Annalisa Convertino; Ivano Lucarini; Andrea Notargiacomo; Julietta V. Rau; Marco Fosca; Giuseppe Marzo

doi:10.3390/app122412538

Applied Sciences (Dec 2022)

Relationship between Reflectivity, Chemical Composition and Mechanical Behaviour of Orthodontic Bonding Nanofiller Resin Materials: A Proposal of an Alternative Method of Investigation

Roberta Condò,
Gianluca Mampieri,
Alessandro Cioffi,
Paola Pirelli,
Aldo Giancotti,
Luca Maiolo,
Francesco Maita,
Annalisa Convertino,
Ivano Lucarini,
Andrea Notargiacomo,
Julietta V. Rau,
Marco Fosca,
Giuseppe Marzo

Affiliations

Roberta Condò: Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”, Via Montpellier, 1, 00133 Rome, Italy
Gianluca Mampieri: Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”, Via Montpellier, 1, 00133 Rome, Italy
Alessandro Cioffi: Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”, Via Montpellier, 1, 00133 Rome, Italy
Paola Pirelli: Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”, Via Montpellier, 1, 00133 Rome, Italy
Aldo Giancotti: Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”, Via Montpellier, 1, 00133 Rome, Italy
Luca Maiolo: Institute for Microelectronics and Microsystems, National Research Council, Via del Fosso del Cavaliere, 100, 00133 Rome, Italy
Francesco Maita: Institute for Microelectronics and Microsystems, National Research Council, Via del Fosso del Cavaliere, 100, 00133 Rome, Italy
Annalisa Convertino: Institute for Microelectronics and Microsystems, National Research Council, Via del Fosso del Cavaliere, 100, 00133 Rome, Italy
Ivano Lucarini: Institute for Microelectronics and Microsystems, National Research Council, Via del Fosso del Cavaliere, 100, 00133 Rome, Italy
Andrea Notargiacomo: Institute for Photonics and Nanotechnologies, National Research Council, Via del Fosso del Cavaliere, 100, 00133 Rome, Italy
Julietta V. Rau: Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, Via del Fosso del Cavaliere, 100, 00133 Rome, Italy
Marco Fosca: Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, Via del Fosso del Cavaliere, 100, 00133 Rome, Italy
Giuseppe Marzo: Department of Life, Health & Environmental Sciences, University of L’Aquila, 67100 L’Aquila, Italy

DOI: https://doi.org/10.3390/app122412538
Journal volume & issue: Vol. 12, no. 24
p. 12538

Abstract

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Background: Relationships between reflectivity, hardness and chemical composition of the dispersed phase, included in orthodontic composites Transbond XTTM (Trans), Light-Cure Orthodontic Paste (Leone) and Bisco Ortho Bracket Paste LC (Bisco), were investigated in vitro to evaluate whether reflectivity results can be useful in internal material composition interpretation, thus obtaining information on mechanical behaviours. Methods: Light transmission through 36 resin discs was measured with a UV/Vis spectrophotometer, evaluating the spectral range from 190–1100 nm. To have a benchmark of material hardness and internal composition, Vickers measurements and Cross-Sectional Focus Ion Beam Scanning Electron Microscopy (FIB/SEM) analysis were provided. Results: Bisco has the highest reflectivity, Leone shows an absorption pattern in the UV region similar to Bisco and Transbond has the lowest reflectivity compared to the others. This trend is confirmed by FIB/SEM imaging, showing a more similar induced roughness and internal composition for Bisco and Leone, with respect to Transbond. Higher filler presence in the composition of Bisco and Leone justifies a higher hardness of these two materials, with respect to Transbond, as confirmed by Vickers measurements. Conclusions: Bisco and Leone show similar optical responses and similarities in mechanical performance. This statement is explained by the lower and similar filler content as confirmed also by FIB/SEM analysis. The inner composition of Bisco and Leone provides a higher value of microhardness, as demonstrated by Vickers measurements. Therefore, this study confirms that the UV-Vis analysis can also offer a significant overview on the internal material composition, thus indirectly providing information on the mechanical properties of orthodontic composites.

Published in Applied Sciences

ISSN: 2076-3417 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Engineering (General). Civil engineering (General); Science: Biology (General); Science: Physics; Science: Chemistry
Website: http://www.mdpi.com/journal/applsci

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