International Journal of Computerized Dentistry, Pre-Print
Monaco, Carlo / Arena, Antonio / Marziali, Andrea / Consolo, Ugo
Seite 1 – 20
Aim: This in vitro study aimed to evaluate the depth of reading of intraoral scanners (IOSs) inside the gingival sulcus.
Materials and methods: A knife-edge preparation for a full crown was performed on a Frasaco model. The gingival sulcus of the scanned model was modified using a dedicated software (Model Creator, Exocad DentalCAD 2.4 Plovdiv) by setting the coronal (CW) and apical (AW) widths and sulcus depths (D). Two dental models with different sulcus depths (1 mm or 2 mm) were printed using the digital light processing (DLP) technique. Each model was scanned ten times with seven IOSs: Emerald, Trios3, Carestrem 3600, Dentalwings, Condor, True Definition Scanner (TDS), and Omnicam. Measurements of D values were performed using 3Shape 3D viewer software. The normality of the data distribution was evaluated using the Shapiro–Wilk test (P<.05). A nonparametric Levene test was performed to check for homoscedasticity. The data were statistically analyzed with Kruskal–Wallis test (α=.05) and Nemenyi’s test.
Result: All IOSs were able to read within the 1 mm-deep gingival sulcus, albeit with some statistically significant differences (P<.001). Only Trios3 was able to read the 2 mm-deep gingival sulcus (P<.001).
Conclusion: The depth of reading of different IOSs can vary significantly. In the model with a 2-mm sulcus, even in the absence of oral fluids, the depth of reading is incomplete, suggesting that deep preparations into the sulcus are difficult to detect with IOSs.