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Published: 01 January 2002
Fig. 39 Crystallographic fatigue in fracture mechanics specimen of cast Co-Cr-Mo-C medical 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 More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c9001690
EISBN: 978-1-62708-226-6
... the weight of the patient, while cyclic loads can total up to 3 × 10 6 cycles per year. 4 The premature failure of metallic implants can be influenced by several factors, including mechanical design, material selection, manufacturing practice, medical installation procedure, postoperative...
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
.... Chesnutt J.C. and Williams J.C. : “ Comments on the Electron Fractography of Alpha Titanium ,” Metall. Trans. A , 1977 , 8 ( 3 ), pp. 514 – 515 10.1007/BF02661765 . Selected references Selected references • Friction and Wear of Medical Implants and Prosthetic Devices , Materials...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006811
EISBN: 978-1-62708-329-4
... and Drug Administration (FDA) defines a medical device as an instrument, apparatus, implement, machine, or implant intended for use in the diagnosis, cure, mitigation, treatment, or prevention of disease that does not achieve its primary intended purposes through chemical action and is not dependent upon...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001841
EISBN: 978-1-62708-241-9
... Abstract Ultrasonic cleaning is widely used in the production of medical devices such as guide wires and vascular implants. There are many cases, however, where cleaning frequencies have been close to the natural frequency of the device, producing resonant vibrations large enough to cause damage...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c9001610
EISBN: 978-1-62708-222-8
... conditions (passivation and surface roughness). Review of ASTM medical device standards, 8 however, does not provide any quantitative data concerning surface roughness and finish of surgical implants. One standard, 9 concerning the practice for surface preparation of metallic surgical implants, states...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c9001606
EISBN: 978-1-62708-226-6
.... Recommendations to improve the fixation implant design are suggested, and the potential benefits of the substitution of titanium or a titanium alloy for the stainless steel are discussed. Biomaterials Biomechanics Fatigue crack growth Medical device 300 series Fatigue fracture The use...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001133
EISBN: 978-1-62708-214-3
... Abstract A femoral knee implant was returned to the casting vendor for analysis after exhibiting poor bond strength between the cast substrate and a sintered porous coating. Both the coating and the substrate were manufactured from a cobalt-chromium-molybdenum alloy. Metallographic analysis...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001805
EISBN: 978-1-62708-241-9
... ) 5. Nitronic 60 Brochure, High Performance Alloys, Inc. , www.hpalloy.com Selected references Selected references • James B.A. , Medical Device Failure Analysis , Materials for Medical Devices , Vol 23 , ASM Handbook , Narayan R.J. , Ed., ASM International , 2012...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.9781627083294
EISBN: 978-1-62708-329-4
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048419
EISBN: 978-1-62708-226-6
... of type 316LR stainless steel and some mechanical fretting and very few corrosion pits were revealed. Type 304 stainless steel was deemed not to be satisfactory as an implant material. Inclusions Surgical implants 304 UNS S30400 Pitting corrosion Figure 1 shows a screw head that exhibits...
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
... Abstract This article commences with a description of the prosthetic devices and implants used for internal fixation. It describes the complications related to implants and provides a list of major standards for orthopedic implant materials. The article illustrates the body environment and its...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048413
EISBN: 978-1-62708-226-6
... on the surface during cyclic loading were observed. The material was showed by the deformation structure to be in the cold-worked condition and was termed to not be the cause of the implant failure. Cyclic loads Slip bands Surgical implants 316L UNS S31603 Fatigue fracture Figure 1(a) shows...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048400
EISBN: 978-1-62708-226-6
... not to be in compliance with standards (type 304 stainless steel without molybdenum). The screws and washers were found to be made of remelted implant-quality type 316L stainless steel and were intact. Signs of sensitization, characterized by chromium carbide precipitates at the grain boundaries, were revealed...
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
.... 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 revealed gas...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c9001573
EISBN: 978-1-62708-226-6
.... Arcing Pitting (wear) Surgical implants Wire Ti-6Al-4V Titanium nitride coating UNS R56406 Surface treatment related failures (Other, miscellaneous, or unspecified) wear Background The TiN coated back surgery wires were made of Ti6A14V. The reported failure was the presence of pits...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048397
EISBN: 978-1-62708-226-6
... Phase transformations Surgical implants Chromium steel Uniform corrosion The four-hole Lane plate shown in Fig. 1(a) was inserted 46 years ago and remained in the body for 26 years. A large portion of the plate disintegrated and consisted mainly of corrosion products. Figure 1(b) shows...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048420
EISBN: 978-1-62708-226-6
... to be possible. Biochemistry Surgical implants Wear particles 316LR Pitting corrosion Figure 1 shows a plate hole with the area that was in contact with the screw head. In contrast to Example, the attack on this high-quality type 316LR stainless steel was only shallow. Figure 1(a) shows...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048421
EISBN: 978-1-62708-226-6
... of corrosion were observed in connection with fretting structures. Surgical implants Wear particles Titanium Fretting wear Figure 1(a) shows a portion of a titanium screw head with a lip of material that was transported by fretting at a plate-hole edge. A flat fretting zone is visible...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048405
EISBN: 978-1-62708-226-6
.... The screws were used with a relatively rigid plate to treat a fracture complication in the upper end of the femur. The fatigue failures were explained by signs of unstable fixation revealed by radiographs. Surgical implants 316LR Fatigue fracture Fatigue fracture can occur on different thread...