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Journal of Nanomaterials
Volume 2013 (2013), Article ID 845205, 5 pages
http://dx.doi.org/10.1155/2013/845205
Research Article

Experimental Investigations on Microcracks in Vibrational and Conventional Drilling of Cortical Bone

1Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, International Joint Research Center of Aerospace Biotechnology and Medical Engineering, Ministry of Science and Technology of China, School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China
2Research Institute of Beihang University in Shenzhen, Shenzhen 518057, China

Received 14 June 2013; Revised 17 July 2013; Accepted 18 July 2013

Academic Editor: Xiaoming Li

Copyright © 2013 Yu Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Bone drilling is widely used in orthopedic surgery. Microcracks will be generated in bone drilling, which may cause fatigue damages and stress fractures. Fresh bovine cortical bones were drilled via vibrational and conventional ways. Drilling operations were performed by a dynamic material testing machine, which can provide the vibration while maintaining uniform feed motion. The drill site and bone debris were observed through scanning electron microscope (SEM). The experimental results showed that fewer and shorter micro-cracks were formed in vibrational drilling than those formed in conventional way. And the surface morphology of bone debris from two different drilling ways was also quite different. It is expected that vibrational drilling in orthopedic surgery operation could decrease the microdamage to the bone, which could lower the incidence of stress fracture and contribute to the postoperative recovery.