Abstract: Objective: To establish digitized dental model with root based on three-dimensional intraoral scanning and CBCT data, and to record the digital information of crown, root, and occlusion. Methods: Upper and lower dentitions of a female volunteer were scanned by CBCT and intraoral scanner. The resulting DICOM data was used for 3D reconstruction in Mimics software, and the independent digital teeth models with roots data were established. A dentition model with teeth roots was regrouped with independent teeth models built from CT data, and the intraoral dentition model data in Geomagic wrap software. Results: Upper and lower 3D digital full structure dentition models were rebuilt containing details of the morphology and position of the crowns and roots of teeth, and the occlusal relationship of upper and lower dentitions. Conclusion: Three-dimensional intraoral scanning combined with CBCT was used to establish a digital model of full dentition including tooth root. It could realize the observation, measurement, and analysis of the changes in the anatomical morphology, position or displacement of the crown, and the tooth root intuitively in orthodontic treatment.

Key words: CBCT, three-dimensional intraoral scanning, three digital model, dentition