Abstract:Statement of problem. Little peer-reviewed information is available regarding the accuracy and reproducibility of digitally fabricated casts in comparison with conventional nondigital methods.Purpose. The purpose of this in vitro study was to compare the accuracy and reproducibility of a digital impression and cast fabrication with a conventional impression and cast fabrication.Material and Methods. Conventional impressions were made via a one-step single viscosity (OS/SV) technique with vinyl siloxanether material of a typodont master model, and conventional casts were cast from dental stone. Digital impressions were obtained with a digital scanner, and digital SLA models were printed. The typodont and fabricated casts were digitized with a structured light scanner and saved in surface tessellation language (STL) format. All STL records were superimposed via a best-fit method. The digital impression and cast fabrication method was compared with the conventional impression and cast fabrication method for discrepancy, accuracy, and reproducibility. The Levene test was used to determine equality of variances and a 1-way analysis of variance (ANOVA) was conducted to assess the overall statistical significance of differences among the groups (n=5, α=.05).

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