Haptic interaction and volume modeling techniques for realistic dental simulation |
| |
Authors: | Laehyun Kim Se Hyung Park |
| |
Affiliation: | (1) Korea Institute of Science and Technology, Korea |
| |
Abstract: | We present haptic simulation and volume modeling techniques for a virtual dental training system. The system allows dental
students to learn dental procedures and master their skills with realistic tactual feelings. It supports various dental procedures,
such as dental probing, to diagnose carious lesions, drilling operation for cavity preparation, and filling the prepared cavities
with amalgam. The system requires fast and stable haptic rendering and volume modeling techniques working on the virtual tooth.
Collision detection and force computation are implemented on an offset surface in volumetric representation to simulate reasonable
physical interactions between dental tools with a certain volume and the teeth model. To avoid discrete haptic feeling due
to the gap between the fast haptic process (1 KHz) and much slower visual update frequency (30 Hz) during drilling and filling
the cavities, we employed an intermediate implicit surface to be animated between the original and target surfaces. The volumetric
teeth model is converted into a geometric model by an adaptive polygonization method to maintain sharp features in every visual
frame. Volumetric material properties are represented by stiffness and color values to simulate the resistance and texture
information depending on anatomical tissues. Finally, we made a dental workbench to register sensory modalities like visual,
auditory and haptic sensation. |
| |
Keywords: | Dental simulation Haptic interaction Volumetric implicit surface Dental workbench |
本文献已被 SpringerLink 等数据库收录! |
|