Research on interactive algorithm of teeth segmentation based on geodesic path
基于测地路径的牙齿模型交互分割算法研究

Separation individual tooth from three-dimensional dental model is an important step in computer aided orthodontics treatment. Because of different shapes of every tooth and huge difference among different people, it is difficult to partition individual tooth automatically. Therefore, this paper presents an interactive segmentation algorithm, whose process is firstly picking up feature points on triangle mesh of dental model interactively, then approximating the geodesic path between feature points and finally partitioning individual tooth from dental model by region grow algorithm once the geodesic path is closed. The experiment indicates that our algorithm runs fast and needs little interactive operation, while the border of the segmented tooth is smooth and meets the clinical requirement of orthodontics.