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Surgical screws

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Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001097
EISBN: 978-1-62708-214-3
... Abstract Two type 316L stainless steel orthopedic screws broke approximately 6 weeks after surgical implant. The screws had been used to fasten a seven-hole narrow dynamic compression plate to a patient's spine. The broken screws and screws of the same vintage and source were examined using...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001804
EISBN: 978-1-62708-241-9
.... The results of the study indicated that the screw failed due to fatigue fracture stemming from surface cracks generated by stress concentration likely caused by grooves left by improper machining. surgical screws fatigue fracture machining defects stainless steel cracking optical and...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001264
EISBN: 978-1-62708-215-0
... with screws. The applicable specification at the time of manufacture was ASTM F55-66T, which pertains to stainless steel bars and wires for surgical implants. Three samples were cut from the plate portion of the implant, two in the vicinity of the fracture and one away from the fracture. These...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001803
EISBN: 978-1-62708-241-9
... deleterious effects on the body. Metallic materials such as stainless steel, 316L, cobalt-chromium alloys, and pure titanium and its alloys have been used for surgical implant materials. The α+β-type titanium alloy, such as Ti6Al4V, has been most widely used as an implant material for artificial hip joints...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006753
EISBN: 978-1-62708-295-2
... routine inspections and maintenance, which may increase in frequency over time. In many cases, avoiding failures beyond a certain predetermined desired life provides no benefit, such as when a surgical implant is designed to far outlive the human recipient. There is also a point of diminishing return on...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006783
EISBN: 978-1-62708-295-2