Effect of Printing Layer Thickness on the Trueness and Margin Quality of 3D-Printed Interim Dental Crowns

The information in the literature on effect of printing layer thickness interim 3D-printed crowns is limited. In present study, trueness and margin quality composite resin was investigated compared with milled crowns. were printed 3 different thicknesses (20, 50, 100 ?m) by using a hybrid based acrylic esters inorganic microfillers or from polymethylmethacrylate (PMMA) discs digitized an intraoral scanner (test scans). compare tool 3D analysis software used to superimpose test scans computer-aided design file manual alignment virtually separate surfaces. Deviations at surfaces calculated root mean square (RMS). Margin examined under stereomicroscope graded. data evaluated one-way ANOVA Tukey HSD tests. affected Milled had higher intaglio occlusal than ?m-layer highest quality, while 20 ?m lowest. varied depending location margin.