Application of 3D tooth model for monitoring of implant space and inter-root distance without radiographs: A proof of concept study

Abstract Background Radiographs are integral for evaluating of implant space and inter-root distance. The purpose of this report is to introduce a method for evaluating 3D root position with minimal radiation using 3D tooth model which is composed of intraoral-scanned crown and CBCT-scanned root. Materials and methods An intraoral scan and CBCT scan of the patient were obtained before treatment. In the CBCT image, tooth segmentation was performed by isolating individual tooth from the maxillary and mandibular alveolar bone using software program. By combining segmented individual tooth with the intraoral scan, consequently, 3D tooth model was fabricated. Results After treatment, the additional intraoral scan at post-treatment was integrated into the tooth model and the resulting position of the root could be predicted without additional radiographs. It is possible to monitor the root position using 3D tooth model without the need for additional radiographs after a pretreatment CBCT scan. Conclusion The application of 3D tooth model benefits the patient by reducing radiation exposure while providing the clinician with a precise treatment evaluation for monitoring tooth movement.