Successful treatment depends not only on the initial diagnosis but also on the accurate assessment of treatment progress. The application of the 3D tooth model benefits the patient by reducing repeated radiation exposure while providing the clinician with a precise treatment evaluation to monitor tooth movement. It is possible to monitor the root position after a pretreatment CBCT scan using a 3D tooth model without additional radiographs. ResultsĪ post-treatment intraoral scan was integrated into the tooth model, and the resulting position of the root could be predicted without additional radiographs. The 3D tooth model was fabricated by combining segmented individual teeth with the intraoral scan. In the CBCT image, tooth segmentation was performed by isolating individual teeth from the maxillary and mandibular alveolar bone using software program. Intraoral scan and CBCT scan of the patient were obtained before treatment. The purpose of this report is to introduce a method for evaluating the 3D root position with minimal radiation using a 3D tooth model composed of an intraoral-scanned crown and a cone-beam computed tomography (CBCT)-scanned root. Radiographs are integral in evaluating implant space and inter-root distance.

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