Comparative analysis of mechanical properties of orthodontic aligners produced by different contemporary 3D printers

Objective The aim of this study was to compare the mechanical properties of orthodontic aligners among different commercially available 3D printing devices. Materials and Methods Five 3D printers (Ka:rv LP 550, Swinwon; “KAR”), (L120, Dazz 3D; “L12”), (MiiCraft 125, Miicraft Jena; “MIC”), (Slash 2,...

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Bibliographic Details
Published in:Orthodontics & craniofacial research 2022-08, Vol.25 (3), p.336-341
Main Authors: Zinelis, Spiros, Panayi, Nearchos, Polychronis, Georgios, Papageorgiou, Spyridon N., Eliades, Theodore
Format: Article
Language:English
Subjects:
3-D printers
3D printing
clear aligners
Comparative analysis
Incisors
instrumented indentation testing
Mechanical properties
Orthodontics
Statistical analysis
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Summary:Objective The aim of this study was to compare the mechanical properties of orthodontic aligners among different commercially available 3D printing devices. Materials and Methods Five 3D printers (Ka:rv LP 550, Swinwon; “KAR”), (L120, Dazz 3D; “L12”), (MiiCraft 125, Miicraft Jena; “MIC”), (Slash 2, Uniz; “SLS”) and (Pro 95, SprintRay; “PRO”) were used to prepare orthodontic aligners with dental resin (Tera Harz TC‐85DAW, Graphy). The central incisors of each aligner were cut, prepared and evaluated in terms of Martens‐Hardness (HM), indentation‐modulus (EIT) and elastic‐index (ηIT) as per ISO14577‐1:2002. Force‐indentation curves were recorded and differences among printers were checked with generalized linear regressions (alpha=5%). Results Statistically significant differences were seen for all mechanical properties (P 
ISSN:1601-6335
1601-6343
DOI:10.1111/ocr.12537