A Framework for Orthodontic Treatment Simulation

Maria Andréia F. RodriguesRafael G. BarbosaMilton E. B. NetoIsabel M. M. P. Ribeiro

An interactive computer-based training tool for using in Orthodontics is aimed at students and experienced professionals who need to predict orthodontic treatment outcomes. Usually, treatment planning and the choice of a proper appliance model are based exclusively on clinician expertise, and most orthodontists work on a trial and error basis, estimating an "ideal" loading condition that can lead to a precise and aimed tooth movement. Therefore, the orthodontist and patient have a strong need for a method which enables them to compute realistic pictures of the expected teeth positioning to circumvent unexpectedly situations that eventually may occur in practice. In this paper we present a framework for orthodontic treatment simulation. We start the study with one- year orthodontic experiment. Based on the data provided by this experiment, the system generates anatomical structures from digitized landmarks, dental cast, X-Rays and photographic records. In particular, we investigate different morphing approaches to find out an approximate solution to represent the empirical outcome. The morphing tool produces soft tissue contouring from hard tissue movements to simulate the changes in shape that the dental arch performs. This gives both the orthodontist and the patient freedom to explore and verify in practice the temporal evolution of the planned treatment.

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