[Reliability study in the measurement of the cusp inclination angle of a chairside digital model].

OBJECTIVE: This study aims to evaluate the reliability of the software Picpick in the measurement of the cusp inclination angle of a digital model. METHODS: Twenty-one trimmed models were used as experimental objects. The chairside digital impression was then used for the acquisition of 3D digital models, and the software Picpick was employed for the measurement of the cusp inclination of these models. The measurements were repeated three times, and the results were compared with a gold standard, which was a manually measured experimental model cusp angle. The intraclass correlation coefficient (ICC) was calculated. RESULTS: The paired t test value of the two measurement methods was 0.91. The ICCs between the two measurement methods and three repeated measurements were greater than 0.9. The digital model achieved a smaller coefficient of variation (9.9%). CONCLUSIONS: The software Picpick is reliable in measuring the cusp inclination of a digital model.