Department of Oromaxillofacial Regeneration, Osaka University, 1-8 Yamada-Oka, Suita 565-0871, Japan.
Dent Mater J. 2011;30(1):1-6. doi: 10.4012/dmj.2010-082. Epub 2011 Jan 26.
A virtual reality (VR) haptic dental training system could be a promising tool for future dental education. One major challenge is to develop a virtual tooth model which similarly reflected a real tooth having multiple layers with different mechanical hardness in each layer. The multi-layered virtual tooth model was successfully constructed in our virtual system. The constructed model allows us to feel tooth cutting which is similar to that with a real tooth. Through a cutting experiment by using the real tooth, a spring coefficient and a damping coefficient of a dental hard tissue were determined 0.8 N/mm and 1.79 Nsec/mm respectively. The feedback force smoothly altered when crossing the border of regions having different mechanical hardnesses. The constructed model introduced in this study could be a promising tool for acquiring dental hand skills in a virtual learning system.
虚拟现实（VR）口腔触觉训练系统可能成为未来口腔医学教育的有前途的工具。一个主要的挑战是开发一个虚拟牙齿模型，该模型类似地反映了一个具有每层不同机械硬度的多层的真实牙齿。我们的虚拟系统中成功构建了多层虚拟牙齿模型。所构建的模型使我们能够感受到类似于用真牙进行的牙齿切割。通过使用真牙进行切割实验，确定了牙科硬组织的弹簧系数和阻尼系数分别为 0.8 N/mm 和 1.79 Nsec/mm。当越过具有不同机械硬度的区域的边界时，反馈力会平滑地改变。本研究中引入的构建模型可能成为虚拟学习系统中获得口腔技能的有前途的工具。
