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(A) This illustration presents the architecture of the proposed multi-stage deep learning model. It incorporates a multi-task network specifically engineered for simultaneous tooth segmentation and classification, supplemented by a hierarchical region of interest-based classification network assigned with the task of predicting the staging of tooth germs. (B) Confusion matrices depicting the model's performance for permanent anterior, permanent premolar, permanent molar teeth, and the overall sample set. (C) Performance comparison among different age groups regarding the mean Dice Similarity Coefficient, average symmetric surface distance, detection and identification accuracy for tooth identification, and mean square error for tooth germ staging. (D) Visual representation of the model's segmentation and classification performance in four representative cases. The red box indicates a tooth with an abnormal orientation, the green box indicates a misclassification, and the yellow box indicates a missed detection. (E) Visual demonstration of the model's segmentation and classification performance across various CBCT imaging sources. (F) A flow chart outlining the end-to-end treatment planning process for premolars using the deep learning model. The input comprises of a CBCT image and a periapical disease prompt, with the output encompassing tooth segmentation, classification, and staging results, culminating in a personalized treatment plan.