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Patient's understanding on forthcoming dental surgeries is required bypatient-centered care and helps reduce fear and anxiety. Due to the gap ofexpertise between patients and dentists, conventional techniques of patienteducation are usually not effective for explaining surgical steps. In thispaper, we present \textit{OralViewer} -- the first interactive application thatenables dentist's demonstration of dental surgeries in 3D to promote patients'understanding. \textit{OralViewer} takes a single 2D panoramic dental X-ray toreconstruct patient-specific 3D teeth structures, which are then assembled withregistered gum and jaw bone models for complete oral cavity modeling. Duringthe demonstration, \textit{OralViewer} enables dentists to show surgery stepswith virtual dental instruments that can animate effects on a 3D model inreal-time. A technical evaluation shows our deep learning based model achievesa mean Intersection over Union (IoU) of 0.771 for 3D teeth reconstruction. Apatient study with 12 participants shows \textit{OralViewer} can improvepatients' understanding of surgeries. An expert study with 3 board-certifieddentists further verifies the clinical validity of our system.

OralViewer: 3D Demonstration of Dental Surgeries for Patient Education with Oral Cavity Reconstruction from a 2D Panoramic X-ray