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KMID : 1035320190460020061
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Korean Society for Dental Materials
2019 Volume.46 No. 2 p.61 ~ p.74
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Effect of accelerated aging on long-term accuracy of full arches manufactured using various 3-dimensional printers
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Moon Joon-Mo
Jeong Chang-Seop
Jeoung Su-Ha
Kim Jeong-Mi
Bae Ji-Myung
Park Young-Bum
Oh Seung-Han
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Abstract
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Full arch models play an important role in clear aligner orthodontic therapy and the preparation of prosthodontic appliances.
Three dimensional (3D) printed full arches are very popular with the benefit of easy production and good mechanical propertiesfor fabricating clear aligner. However, the accuracy of 3D printed full arches after long storage have not been proved yet.
The objective of this study was to estimate the long-term accuracy of 3D full arches produced by the four types of 3D printers(stereo-lithography apparatus (SLA), digital light projector (DLP), PolyjetTM (POL), and fused deposition modeling (FDM)) followingan accelerated aging treatment. The highest accuracy was produced by POL (before treatment) and SLA (after treatment)group, respectively. Comparisons between absolute mean trueness for the 3D printed full arches before and after treatmentindicated that the deviation of the trueness values of FDM group were significantly higher than those of other experimentalgroups (p<0.05). In addition, all trueness relative errors for FDM group were greater than 0.04 after treatment, which washigh compared to those of other experimental groups. Therefore, the long-term storage of full arches fabricated by FDMtype 3D printer is not recommended and the 3D printed full arches should be used immediately whenever possible.
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KEYWORD
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Full arch model, Long-term accuracy, Accelerated aging, Three dimensional (3D) printer
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