Zheng Qingchun, Xia Lei, Zhang Xu, Zhang Chunqiu, Hu Yahui
Technol Health Care. 2018;26(5):843-856. doi: 10.3233/THC-181245.
Thermal damage induced by bone drilling is a common problem during surgical procedures. A recent and promising method utilizes high-frequency low-amplitude vibration in the feed direction during drilling and has the potential to reduce drilling temperature, minimizing the risk of thermal damage.
The purpose of this study was to investigate the effects of ultrasonically-assisted drilling (UAD) on cortical bone temperature.
A series of experiments was conducted to compare the cortical bone temperature during UAD with that during conventional drilling (CD). A thermo-mechanical 3D finite element model (FEM) of UAD was developed, using ABAQUS, to help understand temperature changes during drilling of cortical bone. The numerical simulation results of FEM showed good agreement with the experimental data. Subsequently, a predictive model was developed for bone temperature during drilling, using multiple regression analysis based on the results from numerical simulation.
The results showed drill diameter had the greatest influence on drilling temperature, followed by the rotational speed of the drill. Additionally, the variation of vibration frequency had more influence on the drilling temperature than did the amplitude.
Ultrasonically-assisted drilling is helpful to lower drilling temperature to reduce the thermal damage of bone tissue.
在外科手术过程中，骨钻孔引起的热损伤是一个常见问题。一种最新且有前景的方法是在钻孔过程中沿进给方向利用高频低振幅振动，这有可能降低钻孔温度，将热损伤风险降至最低。
本研究旨在探讨超声辅助钻孔（UAD）对皮质骨温度的影响。
进行了一系列实验，比较超声辅助钻孔过程中与传统钻孔（CD）过程中的皮质骨温度。利用ABAQUS开发了超声辅助钻孔的热-机械三维有限元模型（FEM），以帮助理解皮质骨钻孔过程中的温度变化。有限元模型的数值模拟结果与实验数据吻合良好。随后，基于数值模拟结果，采用多元回归分析建立了钻孔过程中骨温度的预测模型。
结果表明，钻头直径对钻孔温度影响最大，其次是钻头转速。此外，振动频率的变化对钻孔温度的影响比振幅更大。
超声辅助钻孔有助于降低钻孔温度，减少骨组织的热损伤。
