Simulation and Evaluation of a Bone Sawing Procedure for Orthognathic Surgery Based on an Experimental Force Model
Simulation and Evaluation of a Bone Sawing Procedure for Orthognathic Surgery Based on an Experimental Force Model
复制标题
基于实验力模型的正颌手术锯骨手术模拟与评估
DOI：
10.1115/1.4026104
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发表时间：
2014-03-01
影响因子：
1.7
通讯作者：
Wang Chengtao
中科院分区：
文献类型：
--
作者：
Lin Yanping;Yu Dedong;Wang Chengtao
骨锯在正颌手术中广泛应用于矫正上颌畸形。成功的骨锯需要高水平的灵活性和经验。虚拟现实（VR）手术模拟器可以提供一种安全、经济、可重复的训练方法。在本研究中，我们开发了一个具有触觉功能的VR训练模拟器来模拟由实验力模型产生的锯骨力。本研究取10个人头骨，测定手术锯骨力。利用五自由度加工中心和微型往复锯，在不同进给速度（20、40和60mm/min）和主轴转速（9800、11,200和12600转/分钟）下锯切不同骨密度的骨标本。用压电测功仪和信号采集系统记录锯切力。所有实验数据的线性相关分析表明，骨锯力与骨密度和刀具进给速度呈显著的正线性相关，与刀具主轴转速呈中等的负线性相关。通过多元回归分析，确定了锯骨过程的预测模型。采用Omega. 6作为触觉装置，基于实验力模型研制了Lefort I型截骨医学模拟器。通过实验得到的力-时间曲线与仿真器计算得到的力-时间曲线的对比表明，基于实验力模型得到的力与模拟得到的数据在正颌手术锯骨过程中具有相同的趋势。
Bone sawing is widely used in orthognathic surgery to correct maxillary deformities. Successful execution of bone sawing requires a high level of dexterity and experience. A virtual reality (VR) surgical simulator can provide a safe, cost-effective, and repeatable training method. In this study, we developed a VR training simulator with haptic functions to simulate bone-sawing force, which was generated by the experimental force model. Ten human skulls were obtained in this study for the determination of surgical bonesawing force. Using a 5-DOF machining center and a microreciprocating saw, bone specimens with different bone density were sawed at different feed rates (20, 40, and 60mm/min) and spindle speeds (9800, 11,200 and 12,600 cycles per minute). The sawing forces were recorded with a piezoelectric dynamometer and a signal acquisition system. Linear correlation analysis of all experimental data indicates that there were significant positive linear correlations between bone-sawing force and bone density and tool feed rate and a moderate negative linear correlation with tool spindle rate. By performing multiple regression analysis, the prediction models for the bone-sawing procedure were determined. By employing Omega. 6 as a haptic device, a medical simulator for the Lefort I osteotomy was developed based on an experimental force model. Comparison of the force-time curve acquired through experiments and the curve computed from the simulator indicate that the obtained forces based on the experimental force model and the acquired data had the same trend for the bone-sawing procedure of orthognathic surgery.