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implant deficiencies

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Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001819
EISBN: 978-1-62708-180-1
... and its interactions with implants. The considerations for designing internal fixation devices are also described. The article analyzes failed internal fixation devices by explaining the failures of implants and prosthetic devices due to implant deficiencies, mechanical or biomechanical conditions...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0089543
EISBN: 978-1-62708-226-6
... the failure. Bone screws Casting defects Screws Surgical implants ASTM F75 Casting-related failures Portions of the threads of the screw shown in Fig. 1(a) had broken off, and other threads had cracked. The screw was made from a cast Co-Cr-Mo alloy. A longitudinal section through the screw...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048407
EISBN: 978-1-62708-226-6
... stress concentration was revealed to be high. Crack initiation Surgical implants 316LR Fatigue fracture The plate shown in Fig. 1(a) and (b) was used to treat a pseudarthrosis in the proximal femur. Because healing did not progress, the plate was removed and submitted for investigation...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003500
EISBN: 978-1-62708-180-1
..., namely, design deficiencies, material defects, manufacturing/installation defects, and service life anomalies, with examples. The article describes several common charting methods that may be useful in performing an RCA. It also discusses other failure analysis tools, including review of all sources...
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
... situation. Define the deficiency in terms of the symptoms (or indicators). Determine the impact of the deficiency on the component, product, system, and customer. Set a goal. Collect data to provide a measurement of the deficiency. Determine root cause: Analyze the problem to identify the cause(s...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003539
EISBN: 978-1-62708-180-1
... implant alloy. SEM views located (a) 0.025 mm (0.001 in.) from machined notch tip, and (b) 7.6 mm (0.3 in.) from notch tip. Fatigue striations were not resolvable at any location, and the entire fatigue fracture surface displayed similar crystallographic features. Courtesy of D.O. Cox, Cox and Company...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006776
EISBN: 978-1-62708-295-2
... steel tested in rotating bending. No distinct fatigue striations could be resolved. Crack growth direction from right to left Fig. 39 Crystallographic fatigue in fracture mechanics specimen of cast Co-Cr-Mo-C medical implant alloy. Scanning electron microscope views located (a) 0.025 mm (0.001...
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
... are similar to saltwater, so as a first approximation the galvanic series is useful for implants. However, metals behave differently in different environments. The relative positions of metals and alloys in the galvanic series can vary significantly from one environment to another. The position of alloys...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006774
EISBN: 978-1-62708-295-2
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003508
EISBN: 978-1-62708-180-1
... casting gray cast iron low-alloy steel malleable irons pressure die casting semisolid casting squeeze casting FAILURES OF CASTINGS, like the failures of wrought materials, can occur from service conditions, improper design and/or materials selection, manufacturing deficiencies, or a combination...