In vitro accuracies of 3D printed models manufactured by two different printing technologies

Abstract

PurposeThis study aims to compare the accuracies of full-arch models printed by twodifferent 3D printing technologies.Materials and MethodsA mandibular horseshoe-shaped master model was designed with RapidFormXOR2 software The master model was printed 10 times with 3D printers using directlight processing (DLP) and PolyJet technology (n=20). The printed models werethen scanned with an industrial scanner and saved in STL file. All digital modelssuperimposed with the master model STL file and comparison of the truenesswas performed using Geomagic Control 3D analysis software. The precision wascalculated by superimposing combinations of the 10 data sets in each group.ResultsThe trueness of printed models was 46 μm for the DLP printer and 51 μm for PolyJetprinter; however, this difference was not statistically significant (p=0.155). Theprecision of printed models was 43 μm for the DLP printer and 54 μm for PolyJetprinter. DLP printed models were more precise than the PolyJet printed models(p