Simulation of postoperative 3D facial morphology using a physics-based head model |
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Authors: | Yoshimitsu Aoki Shuji Hashimoto Masahiko Terajima Akihiko Nakasima |
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Affiliation: | (1) Department of Applied Physics, School of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan e-mail: aoki, shuji@shalab.phys.waseda.ac.jp, JP;(2) Department of Orthodontics, Faculty of Dentistry, Kyushu University 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan e-mail: teraji@d7.dion.ne.jp; nakasima@dent.kyushu-u.ac.jp, JP |
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Abstract: | We propose a prototype of a facial surgery simulation system for surgical planning and the prediction of facial deformation.
We use a physics-based human head model. Our head model has a 3D hierarchical structure that consists of soft tissue and the
skull, constructed from the exact 3D CT patient data. Anatomic points measured on X-ray images from both frontal and side
views are used to fire the model to the patient's head.
The purposes of this research is to analyze the relationship between changes of mandibular position and facial morphology
after orthognathic surgery, and to simulate the exact postoperative 3D facial shape. In the experiment, we used our model
to predict the facial shape after surgery for patients with mandibular prognathism. Comparing the simulation results and the
actual facial images after the surgery shows that the proposed method is practical. |
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Keywords: | : Head modeling – Physics-based deformation – Surgical simulation – Orthodontics – X-ray image |
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