Fracture of a Bone Drill
A stainless tool steel bone drill broke during an operation on a patient and was examined. It showed two fatigue fractures, one of which had started from a sharp-edged, coarsely milled slot (fracture A1), and the other from a point on the outer sheath surface which was not subjected to particularly high stresses (fracture A2). Fatigue fracture A1 resulted from the stress concentration built up at this point as a result of the sharp edges and the coarse machining grooves. The remains of a number, which had been inscribed with an electrical engraving tool for identification purposes, were found...
Friedrich Karl Naumann, Ferdinand Spies, Fracture of a Bone Drill, ASM Failure Analysis Case Histories: Medical and Biomedical Devices, ASM International, 2019, https://doi.org/10.31399/asm.fach.med.c9001187
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