A Proposed In Vitro Methodology for Assessing the Accuracy of Three-Dimensionally Printed Dental Models and the Impact of Storage on Dimensional Stability

The objective of this study was to propose a standardised methodology for assessing the accuracy three-dimensional printed (3DP) full-arch dental models and impact storage using two printing technologies. A reference model (RM) comprising seven spheres 3D-printed digital light processing (MAX UV, MAX) stereolithography (Form 2, F2) five times per printer. diameter (n = 35) represented dimensional trueness (DT), while twenty-one vectors 105) extending between sphere centres (FT). Samples were measured at (T1) six (T2) weeks commercial profilometer assess their stability. Significant (p < 0.05) contraction in DT occurred T1 T2 with medium deviation 108 µm 99 MAX, 117 118 F2, respectively. No significant > deviations detected FT. median evenly distributed across arch MAX <50 versus where greatest error 278 posterior region. Storage did not significantly model’s contrast FT 0.05). proposed able 3DP. impacted up 6 post-printing.