Aim: Efficient practical training on root canal treatment can be conducted using three-dimensional (3D) printed tooth replicas. Methodology: An extracted maxillary first premolar with a type II canal (Vertucci classification) was enlarged using Ni-Ti rotary files. Cone-beam computed tomography (CBCT) was used to scan the tooth and collect data for 3D printing. In particular, the part connecting the main canals (the isthmus), was designed with three parts (coronal, middle, and apical), and the lateral canal was designed on both sides of the apical area. Thirty-four 3D-printed tooth replicas were scanned with micro-computed tomography (micro-CT). Repeatability was evaluated in terms of the total volume and three area measurements by the ratio of the difference between the measured value and average reference value. The data were statistically analyzed using the Kruskal-Wallis test with the Bonferroni correction. Results: The ratio of the difference between the measured and reference values was significantly lower in the main area than in the lateral canal or isthmus (p<0.001). Upon a further subdivision, the differences for the entire canal and main canals were significantly lower than those for all other parts: coronal, middle, apical, subleft, and subright (p<0.001). Although there was a difference in repeatability between samples in a narrow area, there was no difference in the overall value. Conclusions: 3D printed tooth replicas using images of teeth of interest for root canal treatment practice seems to be a useful way to learn the actual treatment process. Authors:
Sungeun Yang, The Catholic University of Korea School of Medicine, South Korea

About the Presenter(s)
Professor Sungeun Yang is a University Professor/Principal Lecturer at Sungeun Yang, The Catholic University of Korea School of Medicine in South Korea

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