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Article

Dimensional Accuracy Evaluation of Temporary Dental Restorations with Different 3D Printing Systems

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Department of Dental Biomaterials Science, Dental Research Institute, School of Dentistry, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul 03080, Korea
2
Department of Aeronautical & Mechanical Engineering, Inha Technical College, 100 Inha-ro, Michuhol-gu, Incheon 22212, Korea
3
Department of Oral Anatomy, Dental Research Institute, Center for Future Dentistry, School of Dentistry, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul 03080, Korea
4
Department of Dental Science, Dental Research Institute, School of Dentistry, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul 03080, Korea
*
Authors to whom correspondence should be addressed.
Academic Editor: Gianrico Spagnuolo
Materials 2021, 14(6), 1487; https://doi.org/10.3390/ma14061487
Received: 9 February 2021 / Revised: 12 March 2021 / Accepted: 16 March 2021 / Published: 18 March 2021
(This article belongs to the Special Issue 3D-Printed Dental Materials)
With the advent of 3D printing technologies in dentistry, the optimization of printing conditions has been of great interest, so this study analyzed the accuracy of 3D-printed temporary restorations of different sizes produced by digital light processing (DLP) and liquid crystal display (LCD) printers. Temporary restorations of 2-unit, 3-unit, 5-unit, 6-unit, and full-arch cases were designed and printed from a DLP printer using NextDent C&B or an LCD printer using Mazic D Temp (n = 10 each). The restorations were scanned, and each restoration standard tessellation language (STL) file was superimposed on the reference STL file, by the alignment functions, to evaluate the trueness through whole/point deviation. In the whole-deviation analysis, the root-mean-square (RMS) values were significantly higher in the 6-unit and full-arch cases for the DLP printer and in the 5-unit, 6-unit, and full-arch cases for the LCD printer. The significant difference between DLP and LCD printers was found in the 5-unit and full-arch cases, where the DLP printer exhibited lower RMS values. Color mapping demonstrated less shrinkage in the DLP printer. In the point deviation analysis, a significant difference in direction was exhibited in all the restorations from the DLP printer but only in some cases from the LCD printer. Within the limitations of this study, 3D printing was most accurate with less deviation and shrinkage when a DLP printer was used for short-unit restorations. View Full-Text
Keywords: 3D printing; digital dentistry; temporary dental restoration; dimensional measurement accuracy 3D printing; digital dentistry; temporary dental restoration; dimensional measurement accuracy
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MDPI and ACS Style

Moon, W.; Kim, S.; Lim, B.-S.; Park, Y.-S.; Kim, R.J.-Y.; Chung, S.H. Dimensional Accuracy Evaluation of Temporary Dental Restorations with Different 3D Printing Systems. Materials 2021, 14, 1487. https://doi.org/10.3390/ma14061487

AMA Style

Moon W, Kim S, Lim B-S, Park Y-S, Kim RJ-Y, Chung SH. Dimensional Accuracy Evaluation of Temporary Dental Restorations with Different 3D Printing Systems. Materials. 2021; 14(6):1487. https://doi.org/10.3390/ma14061487

Chicago/Turabian Style

Moon, Wonjoon, Seihwan Kim, Bum-Soon Lim, Young-Seok Park, Ryan J.-Y. Kim, and Shin H. Chung 2021. "Dimensional Accuracy Evaluation of Temporary Dental Restorations with Different 3D Printing Systems" Materials 14, no. 6: 1487. https://doi.org/10.3390/ma14061487

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