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The aim of this study was to determine the reproducibility, reliability and validity of measurements in digital models compared to plaster models. Fifteen pairs of plaster models were obtained from orthodontic patients with permanent dentition before treatment. These were digitized to be evaluated with the program Cécile3 v2.554.2 beta. Two examiners measured three times the mesiodistal width of all the teeth present, intercanine, interpremolar and intermolar distances, overjet and overbite. The plaster models were measured using a digital vernier. The t-Student test for paired samples and interclass correlation coefficient (ICC) were used for statistical analysis. The ICC of the digital models were 0.84 +/- 0.15 (intra-examiner) and 0.80 +/- 0.19 (inter-examiner). The average mean difference of the digital models was 0.23 +/- 0.14 and 0.24 +/- 0.11 for each examiner, respectively. When the two types of measurements were compared, the values obtained from the digital models were lower than those obtained from the plaster models (p &lt; 0.05), although the differences were considered clinically insignificant (differences &lt; 0.1 mm). The Cécile digital models are a clinically acceptable alternative for use in Orthodontics.

Reproducibility, reliability and validity of measurements obtained from Cecile3 digital models