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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
...Abstract Abstract This paper summarizes several cases of metallurgical failure analysis of surgical implants conducted at the Laboratory of Failure Analysis of IPT, in Brazil. Investigation revealed that most of the samples were not in accordance with ISO standards and presented evidence...
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 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...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c9001664
EISBN: 978-1-62708-226-6
... hip screws Plastic deformation Surgical implants 316L UNS S31603 Fatigue fracture Corrosion fatigue In fractures of and around the head of the femur, a compression hip screw surgical implant is sometimes employed to provide bone alignment and fixation during healing. Figure 1 shows...
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
... for surgical implant materials. Additionally, none of the stainless steel piercings passed the pitting-resistance criterion of ISO 5832-1, which implies that [%Cr + 3.3(%Mo)] > 26. Under microscopic examination, most of the jewelry revealed the intense presence of linear irregularities on the surface...
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
... produced 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...
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
... contribution of other factors, such as scientific/technological progress and enhanced exposure of individuals to trauma risk [ 1 , 2 ]. Articles about surgical implants, either orthopedic or dental, report their characteristics such as: biocompatibility, mechanical strength (both static and dynamic...
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
... made 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...
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
.... Manufacturers should never attempt to salvage this type of critical device by welding or any other procedure that might compromise its integrity. Repair welding Surgical implants 316L UNS S31603 Fatigue fracture Joining-related failures Background A “Jewett nail” hip implant failed after 2...
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
... The use of surgically implantable biomedical fixation devices to stabilize fractured bones into proper alignment for subsequent healing is a widely accepted medical practice. 1 Thousands of these devices have been inserted into human beings within the last half-century. 2 In the form of tubes, rods...
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
... the microarcing. 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...
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.c0048421
EISBN: 978-1-62708-226-6
.... No morphological signs 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...
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.c0048400
EISBN: 978-1-62708-226-6
... by the microstructure. Intercrystalline corrosion with pitted grains was indicated by SEM fractography. Improper heat treatment of the steel was interpreted to have led to intercrystalline corrosion and implant separation. Heat treatment Surgical implants 304 UNS S30400 Intergranular fracture Intergranular...
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
... capability without 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...
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...
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.c0048399
EISBN: 978-1-62708-226-6
... on the fracture surface of this pin. Thus, the effect of different conditions of cobalt-chromium alloys on failure behavior was demonstrated as a result of this study. Grain boundaries Surgical implants ASTM F75 Brittle fracture Two of four adjustable Moore pins, which had been used to stabilize...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001801
EISBN: 978-1-62708-241-9
.... Shepard L.A. et al. , Characterization of a failed spinal implant (Harrington rod) , in ASM Conference Proceedings , Metals Park ( 1988 ), pp. 411 – 418 3. ASTM F136-02a , Standard specification for wrought titanium–6 aluminum–4 vanadium ELI (extra low interstitial) alloy for surgical...
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
... on the device "failures" that include fracture, wear, and corrosion. The article first discusses failure modes of long-term orthopedic and cardiovascular implants. The article then focuses on short-term implants, typically bone screws and plates. Lastly, failure modes of surgical tools are discussed...