Development of a Dental Skills Training Simulator Using Virtual Reality and Haptic Device
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چکیده
The traditional approach to dental skills training has drawbacks in terms of cost, availability, and lack of real-world cases. We develop a virtual reality (VR) dental training system utilizing a haptic (force feedback) device. We generate three-dimensional surface model of the teeth from patient’s data and a realistic model of a dental handpiece with a cylindrical cutting burr. Collision detection between virtual teeth and a tool is realized by the Axis Aligned Bounding Box (AABB) algorithm. We extend the force computation algorithm for a spherical tool to work with a cylindrical tool. Tooth cutting for preparation process is simulated using a surface displacement technique. The realism of the prototype is acceptable and the stability requirements are satisfied by maintaining a haptic update rate at 1 KHz and graphics rate at a minimum of 30 Hz on a moderate PC. A feasibility study of our system has been conducted with dental students and experts from Thammasat University. To the best of our knowledge, this is the first feasibility study of VR dental cutting simulator for skills training. Based on the feedback we obtained, our simulator is found to be very useful and promising as supplemental training.
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تاریخ انتشار 2008