面向牙齿钻削手术仿真的体建模方法

Voxel-based modeling for haptic-enabled dental drilling simulation

通过分析虚拟牙齿钻削手术对模型的要求,建立了基于线性表的均匀立方体体素网格模型,设计了材料去除与模型重构算法,实时模拟钻削中模型的拓扑结构变化,并采用点绘制方法进行图形显示。采用0.1mm的剖分粒度进行实验,证明牙齿体素模型的实时性可以满足1kHz的力觉反馈和30Hz的图形显示要求,设计的模型重构算法可以较精确地实现多种不同尺寸工具的钻削仿真。

This paper establishes a linear list-based uniform cube-voxel model through the analysis of the requirements of virtual teeth drilling operation modeling. A material removal and reconstruction algorithm is designed for real-time simulation of topology update caused by drilling operation and point-based rendering is used for image processing. The experimental re- suits show that the model decomposed by 0.1 mm could well satisfy the demand of the force feedback frequency of 1 kHz and the model reconstruction frequency of 30Hz. At the same time, the model reconstruction algorithm can precisely simulate various drilling tools in different sizes.