An Investigation Of Chip Formation On Different Penetration Angle For Orthopaedic Surgical Bone Drilling

This work is to investigate the effects of chips formation type on the quality of bone drilling procedure. Totals of 17 drills were design and tested with different geometry namely point angle, helix angle and web thickness on different penetration angle (00, 150, and 300) to mimic the manually control penetration by the surgeon. The results depict that variation in chip formation morphology depends on drills design geometry, drilling parameters and different penetration angle. The chip morphology physical shape in bone drilling in this experiment can be categorized as powder, needle, conical fan, short spiral fan and long conical fan with different size. It can be observed that penetration angle 00 and 150 give the small sizes chips morphology compared to 300 for all the drills design.