Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering, National Demonstration Center for Experimental Mechanical and Electrical Engineering Education, Tianjin University of Technology, Tianjin, China.
Department of General Surgery, Tianjin Medical University General Hospital, Tianjin, China.
Proc Inst Mech Eng H. 2021 Apr;235(4):378-388. doi: 10.1177/0954411920983662. Epub 2020 Dec 23.
Bone surgery is a complex process involving sustainable and healthy human recuperation, but poor surface quality and loose implant fixtures can affect the recovery time of orthopedic patients. However, it has been demonstrated that the application of ultrasonic vibration during drilling procedures can improve the success of bone remediation procedures. The focus of the present paper was on the investigation of surface quality and pullout strength of drilled holes. After analyzing the special kinematic characteristics of the ultrasonically-assisted drilling (UAD), UAD testing using fresh cortical bone was carried out and compared with the results obtained after conventional drilling (CD) procedures. Surface roughness measurements and microscope examination were used to evaluate surface quality, and an electro-mechanical tensile machine was used to measure pullout resistance. The test findings indicated that surface roughness was reduced by 17-68.7% when using UAD; the axial pullout strength of screws inserted into UAD holes was significantly increased by 4.28-30.1% compared to that of CD. It was found also that low spindle speeds and high feed rates reduced surface quality and the stability of the inserted cortical screws. The findings demonstrated that UAD produced better surface quality and higher pullout strengths, which could provide greater stability for implants and improved post-operative recovery.
骨外科手术是一个复杂的过程，涉及到可持续和健康的人类康复，但表面质量差和植入物松动会影响骨科患者的康复时间。然而，已经证明，在钻孔过程中应用超声振动可以提高骨修复手术的成功率。本文的重点是研究钻孔的表面质量和拔出强度。在分析了超声辅助钻孔（UAD）的特殊运动学特征后，对新鲜皮质骨进行了 UAD 测试，并与传统钻孔（CD）的结果进行了比较。使用表面粗糙度测量和显微镜检查来评估表面质量，并使用电动拉伸机测量拔出阻力。试验结果表明，使用 UAD 时表面粗糙度降低了 17-68.7%；与 CD 相比，插入 UAD 孔中的螺钉的轴向拔出强度显著提高了 4.28-30.1%。还发现低主轴转速和高进给速度会降低表面质量和插入皮质螺钉的稳定性。研究结果表明，UAD 可获得更好的表面质量和更高的拔出强度，从而为植入物提供更大的稳定性并改善术后恢复。
