Dimensional Accuracy of Dental Models Printed with Different Resins Using a Low-Cost LCD 3D Printer

Abstract

This in vitro study investigated the influence of resin formulation on the dimensional accuracy of dental models fabricated using a consumer-grade LCD 3D printer. Thirty full-arch models (n = 10 per group) were printed with three resins: Water-Washable, Ortho Model, and Study Model. All specimens were produced at 50 µm layer height and analyzed using an inEos X5 scanner and Geomagic Control 2014 software. Trueness was quantified using Root Mean Square (RMS) deviation values. One-way ANOVA revealed a significant effect of resin type (F(2,27) = 9.53, p = 0.0007). The water-washable resin showed the lowest mean RMS deviation (109.0 ± 13.8 µm). All materials remained within clinically acceptable limits (<250 µm). Resin selection influences accuracy when using consumer-grade LCD printing systems.