Mechanical properties of “two generations” of teeth aligners: Change analysis during oral permanence
Aim of this in vitro study was to analyze structural properties of two different polymeric orthodontic aligners, Exceed30 (EX30) and Smart Track (LD30), before and after use. Forty patterns of aligners were randomly selected: 20 LD30 and 20 EX30, worn intra-orally for 14±3 days, 22 h/day. From each...
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| Veröffentlicht in: | Dental Materials Journal 2018/09/27, Vol.37(5), pp.835-842 |
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| creator | CONDO’, Roberta PAZZINI, Luca CERRONI, Loredana PASQUANTONIO, Guido LAGANA’, Giuseppina PECORA, Alessandro MUSSI, Valentina RINALDI, Antonio MECHERI, Barbara LICOCCIA, Silvia MAIOLO, Luca |
| description | Aim of this in vitro study was to analyze structural properties of two different polymeric orthodontic aligners, Exceed30 (EX30) and Smart Track (LD30), before and after use. Forty patterns of aligners were randomly selected: 20 LD30 and 20 EX30, worn intra-orally for 14±3 days, 22 h/day. From each aligner, 10 specimens were prepared from buccal surfaces of the incisor region by the cutting of samples 5×5 mm under a stereomicroscope. All samples were subjected to Fourier transform infrared spectroscopy, micro-Raman spectroscopy, X-ray diffraction, tensile and indentation strength test. LD30 appeared more homogeneous, with a crystalline fraction lower than EX30 and exhibited a higher elastic behavior and a lower tendency to warp after use than EX30. LD30 demonstrated better adaptability to the dental arch and greater consistency of application of orthodontic forces than produced with EX30. However, both materials showed structural modifications that resulted in increased sample hardness and hyper-plasticity. |
| doi_str_mv | 10.4012/dmj.2017-323 |
| format | Article |
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Forty patterns of aligners were randomly selected: 20 LD30 and 20 EX30, worn intra-orally for 14±3 days, 22 h/day. From each aligner, 10 specimens were prepared from buccal surfaces of the incisor region by the cutting of samples 5×5 mm under a stereomicroscope. All samples were subjected to Fourier transform infrared spectroscopy, micro-Raman spectroscopy, X-ray diffraction, tensile and indentation strength test. LD30 appeared more homogeneous, with a crystalline fraction lower than EX30 and exhibited a higher elastic behavior and a lower tendency to warp after use than EX30. LD30 demonstrated better adaptability to the dental arch and greater consistency of application of orthodontic forces than produced with EX30. However, both materials showed structural modifications that resulted in increased sample hardness and hyper-plasticity.</description><identifier>ISSN: 0287-4547</identifier><identifier>EISSN: 1881-1361</identifier><identifier>DOI: 10.4012/dmj.2017-323</identifier><identifier>PMID: 29998941</identifier><language>eng</language><publisher>Japan: The Japanese Society for Dental Materials and Devices</publisher><subject>Adaptability ; Alignment ; Dental materials ; Dentistry ; Elasticity ; Fourier transform infrared spectroscopy ; Fourier transforms ; Hardness ; Humans ; In Vitro Techniques ; Indentation ; Indentation and tensile strength test ; Infrared spectroscopy ; Invisalign ; Materials Testing ; Mechanical properties ; Micro-Raman spectroscopy ; Orthodontic Appliance Design ; Orthodontic Appliances, Removable ; Orthodontics ; Raman spectroscopy ; Spectroscopy ; Spectroscopy, Fourier Transform Infrared ; Spectrum analysis ; Spectrum Analysis, Raman ; Surface Properties ; Teeth ; Tensile Strength ; X-Ray Diffraction</subject><ispartof>Dental Materials Journal, 2018/09/27, Vol.37(5), pp.835-842</ispartof><rights>2018 The Japanese Society for Dental Materials and Devices</rights><rights>Copyright Japan Science and Technology Agency 2018</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c671t-eb558db8c91a7ec7b1577b9cd2259403c683f0b09eefd93515d37a635c13bf333</citedby><cites>FETCH-LOGICAL-c671t-eb558db8c91a7ec7b1577b9cd2259403c683f0b09eefd93515d37a635c13bf333</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,1877,27901,27902</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/29998941$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>CONDO’, Roberta</creatorcontrib><creatorcontrib>PAZZINI, Luca</creatorcontrib><creatorcontrib>CERRONI, Loredana</creatorcontrib><creatorcontrib>PASQUANTONIO, Guido</creatorcontrib><creatorcontrib>LAGANA’, Giuseppina</creatorcontrib><creatorcontrib>PECORA, Alessandro</creatorcontrib><creatorcontrib>MUSSI, Valentina</creatorcontrib><creatorcontrib>RINALDI, Antonio</creatorcontrib><creatorcontrib>MECHERI, Barbara</creatorcontrib><creatorcontrib>LICOCCIA, Silvia</creatorcontrib><creatorcontrib>MAIOLO, Luca</creatorcontrib><creatorcontrib>Institute for Microelectronics and Microsystems - National Research Council (IMM-CNR Via del Fosso del Cavaliere</creatorcontrib><creatorcontrib>University of Rome "Tor Vergata"</creatorcontrib><creatorcontrib>Institute of Complex Systems - National Research Council (ISC-CNR Via del Fosso del Cavaliere</creatorcontrib><creatorcontrib>Department of Chemical Science and Technology</creatorcontrib><creatorcontrib>Department of Clinical Sciences and Translational Medicine</creatorcontrib><creatorcontrib>ENEA - Technical Unit for Material Technologies (UTTMAT Casaccia Research Center</creatorcontrib><title>Mechanical properties of “two generations” of teeth aligners: Change analysis during oral permanence</title><title>Dental Materials Journal</title><addtitle>Dent. Mater. J.</addtitle><description>Aim of this in vitro study was to analyze structural properties of two different polymeric orthodontic aligners, Exceed30 (EX30) and Smart Track (LD30), before and after use. Forty patterns of aligners were randomly selected: 20 LD30 and 20 EX30, worn intra-orally for 14±3 days, 22 h/day. From each aligner, 10 specimens were prepared from buccal surfaces of the incisor region by the cutting of samples 5×5 mm under a stereomicroscope. All samples were subjected to Fourier transform infrared spectroscopy, micro-Raman spectroscopy, X-ray diffraction, tensile and indentation strength test. LD30 appeared more homogeneous, with a crystalline fraction lower than EX30 and exhibited a higher elastic behavior and a lower tendency to warp after use than EX30. LD30 demonstrated better adaptability to the dental arch and greater consistency of application of orthodontic forces than produced with EX30. However, both materials showed structural modifications that resulted in increased sample hardness and hyper-plasticity.</description><subject>Adaptability</subject><subject>Alignment</subject><subject>Dental materials</subject><subject>Dentistry</subject><subject>Elasticity</subject><subject>Fourier transform infrared spectroscopy</subject><subject>Fourier transforms</subject><subject>Hardness</subject><subject>Humans</subject><subject>In Vitro Techniques</subject><subject>Indentation</subject><subject>Indentation and tensile strength test</subject><subject>Infrared spectroscopy</subject><subject>Invisalign</subject><subject>Materials Testing</subject><subject>Mechanical properties</subject><subject>Micro-Raman spectroscopy</subject><subject>Orthodontic Appliance Design</subject><subject>Orthodontic Appliances, Removable</subject><subject>Orthodontics</subject><subject>Raman spectroscopy</subject><subject>Spectroscopy</subject><subject>Spectroscopy, Fourier Transform 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| ispartof | Dental Materials Journal, 2018/09/27, Vol.37(5), pp.835-842 |
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| subjects | Adaptability Alignment Dental materials Dentistry Elasticity Fourier transform infrared spectroscopy Fourier transforms Hardness Humans In Vitro Techniques Indentation Indentation and tensile strength test Infrared spectroscopy Invisalign Materials Testing Mechanical properties Micro-Raman spectroscopy Orthodontic Appliance Design Orthodontic Appliances, Removable Orthodontics Raman spectroscopy Spectroscopy Spectroscopy, Fourier Transform Infrared Spectrum analysis Spectrum Analysis, Raman Surface Properties Teeth Tensile Strength X-Ray Diffraction |
| title | Mechanical properties of “two generations” of teeth aligners: Change analysis during oral permanence |
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