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Effect of print orientation on the dimensional accuracy of orthodontic aligners printed 3-dimensionally

Fabrication of orthodontic aligners directly via 3-dimensional (3D) printing presents the potential to increase the efficiency of aligner production relative to traditional workflows; however tunable aspects of the 3D-printing process might affect the dimensional fidelity of the fabricated appliance...

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Bibliographic Details
Published in:American journal of orthodontics and dentofacial orthopedics 2021-11, Vol.160 (5), p.732-742.e1
Main Authors: Boyer, Ryan A., Kasper, F. Kurtis, English, Jeryl D., Jacob, Helder B.
Format: Article
Language:English
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Summary:Fabrication of orthodontic aligners directly via 3-dimensional (3D) printing presents the potential to increase the efficiency of aligner production relative to traditional workflows; however tunable aspects of the 3D-printing process might affect the dimensional fidelity of the fabricated appliances. This study aimed to investigate the effect of print orientation on the dimensional accuracy of orthodontic aligners printed directly with a 3D printer. A digitally designed aligner of 500 μm thickness was printed in 3D in Grey V4 (Formlabs, Somerville, Mass) resin at 8 angulations at 45° intervals (n = 10 per angulation) using a stereolithography 3D printer. Each aligner was scanned with an optical scanner, and all but the intaglio surface of each scan was digitally removed. Each resultant scan file was superimposed onto the isolated intaglio of the designed master aligner file. The dimensional deviation was quantified with Geomagic Control software (3D Systems, Rock Hill, SC), and data were analyzed using R statistical software (version 2018; R Core Team, Vienna, Austria) (P 
ISSN:0889-5406
1097-6752
DOI:10.1016/j.ajodo.2021.01.018