Abstract
Statement of problem
When 3-dimensional printing casts, the operator can change the type of resin and the
printing layer thickness, reducing the fabrication time. However, how these parameters
affect the accuracy of 3-dimensionally printed casts is unknown.
Purpose
The purpose of this in vitro study was to evaluate the accuracy of 3-dimensionally
printed casts by using a stereolithography (SLA) 3-dimensional printer (Forms2) with
3 different layer thickness (25, 50, and 100 μm) and 2 different resins (Gray and
Cast) and by comparing the time to obtain each cast.
Material and Methods
One master cast was scanned, and a single file was printed several times. The printed
casts were then scanned by using a laboratory scanner. The standard tessellation language
(STL) files provided by the laboratory scanner were superimposed and compared by using
a software program (Geomagic Control; 3D Systems). The 2-way ANOVA test was used for
the trueness evaluation, followed by the Tukey test to identify differences among
the groups (α=.05).
Results
No statistically significant differences in accuracy were found among the 3 different
layers for either resin (P>.05). Printing time doubled as layer thickness decreased.
Conclusions
This study showed that when printing casts, the fastest printing settings can be used
without losing accuracy and that the laboratory digital workflow can be accelerated
with selection of the resin and cast layer, as the type of resin and layer thickness
did not influence the quality of the casts.
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Article info
Publication history
Published online: July 01, 2021
Identification
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© 2021 by the Editorial Council for the Journal of Prosthetic Dentistry.
