Thermoplastic Disks Used for Commercial Orthodontic Aligners: Complete Physicochemical and Mechanical Characterization
Invisible orthodontic aligners (IOAs) have been introduced in the orthodontic field as an innovative alternative for fixed brackets, in relation to their ability to be easily inserted/removed from the oral cavity without affecting the chewing ability and the aesthetic of the patients. The paper prov...
| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-05-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/10/2386 |
| id |
doaj-41f12069e7bc4008a3ffe4692c512dd3 |
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Article |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Valeria Daniele Ludovico Macera Giuliana Taglieri Alessandra Di Giambattista Giuseppe Spagnoli Alessandra Massaria Massimo Messori Enrico Quagliarini Gianluca Chiappini Vincenzo Campanella Stefano Mummolo Enrico Marchetti Giuseppe Marzo Vincenzo Quinzi |
| spellingShingle |
Valeria Daniele Ludovico Macera Giuliana Taglieri Alessandra Di Giambattista Giuseppe Spagnoli Alessandra Massaria Massimo Messori Enrico Quagliarini Gianluca Chiappini Vincenzo Campanella Stefano Mummolo Enrico Marchetti Giuseppe Marzo Vincenzo Quinzi Thermoplastic Disks Used for Commercial Orthodontic Aligners: Complete Physicochemical and Mechanical Characterization Materials thermoplastic materials invisible orthodontic appliances physicochemical characterization mechanical properties colour change evaluations water absorption behaviour |
| author_facet |
Valeria Daniele Ludovico Macera Giuliana Taglieri Alessandra Di Giambattista Giuseppe Spagnoli Alessandra Massaria Massimo Messori Enrico Quagliarini Gianluca Chiappini Vincenzo Campanella Stefano Mummolo Enrico Marchetti Giuseppe Marzo Vincenzo Quinzi |
| author_sort |
Valeria Daniele |
| title |
Thermoplastic Disks Used for Commercial Orthodontic Aligners: Complete Physicochemical and Mechanical Characterization |
| title_short |
Thermoplastic Disks Used for Commercial Orthodontic Aligners: Complete Physicochemical and Mechanical Characterization |
| title_full |
Thermoplastic Disks Used for Commercial Orthodontic Aligners: Complete Physicochemical and Mechanical Characterization |
| title_fullStr |
Thermoplastic Disks Used for Commercial Orthodontic Aligners: Complete Physicochemical and Mechanical Characterization |
| title_full_unstemmed |
Thermoplastic Disks Used for Commercial Orthodontic Aligners: Complete Physicochemical and Mechanical Characterization |
| title_sort |
thermoplastic disks used for commercial orthodontic aligners: complete physicochemical and mechanical characterization |
| publisher |
MDPI AG |
| series |
Materials |
| issn |
1996-1944 |
| publishDate |
2020-05-01 |
| description |
Invisible orthodontic aligners (IOAs) have been introduced in the orthodontic field as an innovative alternative for fixed brackets, in relation to their ability to be easily inserted/removed from the oral cavity without affecting the chewing ability and the aesthetic of the patients. The paper provides a complete physicochemical and mechanical characterization of thermoplastic materials in the form of disks used for commercial IOAs. A wide palette of specific techniques is considered, from tensile tests and dynamic-mechanical analysis, to X-Ray diffraction (XRD), differential scanning calorimetry (DSC), Fourier transformation infrared spectroscopy (FTIR-ATR) analyses and water absorption tests. The disks are investigated before and after immersion into staining beverages (red wine, coffee, nicotine and artificial saliva), in terms of colour variations, transparency, and microscopic surface modifications by means of colorimetry, UV-VIS absorbance and scanning electron microscopy (SEM). Among all the samples, polyurethane (PU) exhibited the highest crystallinity and the highest values of mechanical and thermal resistance, while the poly(ethylene terephthalate)-glycol (PETG) samples presented better transparency and less ability to absorb water. Moreover, red wine and coffee give noticeable colour variations after 14 days of immersion, together with a slight reduction of transparency. |
| topic |
thermoplastic materials invisible orthodontic appliances physicochemical characterization mechanical properties colour change evaluations water absorption behaviour |
| url |
https://www.mdpi.com/1996-1944/13/10/2386 |
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doaj-41f12069e7bc4008a3ffe4692c512dd32020-11-25T03:03:38ZengMDPI AGMaterials1996-19442020-05-01132386238610.3390/ma13102386Thermoplastic Disks Used for Commercial Orthodontic Aligners: Complete Physicochemical and Mechanical CharacterizationValeria Daniele0Ludovico Macera1Giuliana Taglieri2Alessandra Di Giambattista3Giuseppe Spagnoli4Alessandra Massaria5Massimo Messori6Enrico Quagliarini7Gianluca Chiappini8Vincenzo Campanella9Stefano Mummolo10Enrico Marchetti11Giuseppe Marzo12Vincenzo Quinzi13Department of Industrial and Information Engineering and Economics, University of L’Aquila, Piazzale Pontieri 1, Monteluco di Roio, 67100 L’Aquila, ItalyDepartment of Industrial and Information Engineering and Economics, University of L’Aquila, Piazzale Pontieri 1, Monteluco di Roio, 67100 L’Aquila, ItalyDepartment of Industrial and Information Engineering and Economics, University of L’Aquila, Piazzale Pontieri 1, Monteluco di Roio, 67100 L’Aquila, ItalyDepartment of Industrial and Information Engineering and Economics, University of L’Aquila, Piazzale Pontieri 1, Monteluco di Roio, 67100 L’Aquila, ItalyDepartment of Industrial and Information Engineering and Economics, University of L’Aquila, Piazzale Pontieri 1, Monteluco di Roio, 67100 L’Aquila, ItalyDepartment of Life, Health & Environmental Sciences, Postgraduate School of Orthodontics, University of L’Aquila, P.le Salvatore Tommasi 1, Ed. Delta 6, 67100 Coppito L’Aquila, ItalyDepartment of Engineering ‘Enzo Ferrari’, University of Modena and Reggio Emilia, Via P. Vivarelli 10, 41125 Modena, ItalyDepartment of Construction, Civil Engineering and Architecture, Polytechnic University of Marche, 60121 Ancona, ItalyDepartment of Industrial Engineering and Mathematical Sciences, Polytechnic University of Marche, via Brecce Bianche snc, 60131 Ancona, ItalyDepartment of Clinical Science and Translational Medicine, University of Rome “Tor Vergata”, Via Montpellier 1, 00133 Rome, ItalyDepartment of Life, Health & Environmental Sciences, Postgraduate School of Orthodontics, University of L’Aquila, P.le Salvatore Tommasi 1, Ed. Delta 6, 67100 Coppito L’Aquila, ItalyDepartment of Life, Health & Environmental Sciences, Postgraduate School of Orthodontics, University of L’Aquila, P.le Salvatore Tommasi 1, Ed. Delta 6, 67100 Coppito L’Aquila, ItalyDepartment of Life, Health & Environmental Sciences, Postgraduate School of Orthodontics, University of L’Aquila, P.le Salvatore Tommasi 1, Ed. Delta 6, 67100 Coppito L’Aquila, ItalyDepartment of Life, Health & Environmental Sciences, Postgraduate School of Orthodontics, University of L’Aquila, P.le Salvatore Tommasi 1, Ed. Delta 6, 67100 Coppito L’Aquila, ItalyInvisible orthodontic aligners (IOAs) have been introduced in the orthodontic field as an innovative alternative for fixed brackets, in relation to their ability to be easily inserted/removed from the oral cavity without affecting the chewing ability and the aesthetic of the patients. The paper provides a complete physicochemical and mechanical characterization of thermoplastic materials in the form of disks used for commercial IOAs. A wide palette of specific techniques is considered, from tensile tests and dynamic-mechanical analysis, to X-Ray diffraction (XRD), differential scanning calorimetry (DSC), Fourier transformation infrared spectroscopy (FTIR-ATR) analyses and water absorption tests. The disks are investigated before and after immersion into staining beverages (red wine, coffee, nicotine and artificial saliva), in terms of colour variations, transparency, and microscopic surface modifications by means of colorimetry, UV-VIS absorbance and scanning electron microscopy (SEM). Among all the samples, polyurethane (PU) exhibited the highest crystallinity and the highest values of mechanical and thermal resistance, while the poly(ethylene terephthalate)-glycol (PETG) samples presented better transparency and less ability to absorb water. Moreover, red wine and coffee give noticeable colour variations after 14 days of immersion, together with a slight reduction of transparency.https://www.mdpi.com/1996-1944/13/10/2386thermoplastic materialsinvisible orthodontic appliancesphysicochemical characterizationmechanical propertiescolour change evaluationswater absorption behaviour |