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GPU-BASED HAPTIC SIMULATOR FOR DENTAL BONE DRILLING

机译：基于GPU的触觉模拟器，用于牙科钻孔

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摘要

Dental bone drilling is an inexact and often a blind art. Dentist risks damaging the invisible tooth roots, nerves and critical dental structures like mandibular canal and maxillary sinus. This paper presents a haptics-based jawbone drilling simulator for novice surgeons. Through the real-time training of tactile sensations based on patient-specific data, improved outcomes and faster procedures can be provided. Previously developed drilling simulators usually adopt penalty-based contact force models and often consider only spherical-shaped drill bits for simplicity and computational efficiency. In contrast, our simulator is equipped with a more precise force model, adapted from the Voxmap-PointShell (VPS) method to capture the essential features of the drilling procedure. In addition, the proposed force model can accommodate various shapes of drill bits. To achieve better anatomical accuracy, our oral model has been reconstructed from Cone Beam CT, using voxel-based method. To enhance the real-time response, the parallel computing power of Graphics Processing Units is exploited through extra efforts for data structure design, algorithms parallelization, and graphic memory utilization. Preliminary results show that the developed system can produce appropriate force feedback at different tissue layers.
机译：牙科骨钻孔是一种不精确的和经常的盲技术。牙医风险损坏无形牙根，神经和关键的牙齿结构像下颌管及上颌窦。本文提出了一种基于触觉，下颚骨钻孔模拟器新手的外科医生。通过根据患者的具体数据触觉，提高结果的实时培训和更快的可以提供程序。以前开发的钻井模拟器通常采用基于罚接触力模型，往往只考虑简单性和计算效率球面形钻头。相比之下，我们的模拟器配备了更精确的力模型，改编自Voxmap-PointShell（VPS）的方法以捕获钻孔过程的基本特征。此外，所提出的力模型可以容纳钻头的各种形状。为了达到更好的解剖精度，我们的口腔模型已经从锥束CT重建，采用基于体素的方法。以提高实时响应，图形处理单元的并行计算能力通过用于数据结构设计，算法并行化，和图形存储器利用额外的努力利用。初步结果表明，该系统可产生在不同的组织层适当的力的反馈。

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