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bone

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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
... only after a fatigue crack begins to propagate into the small plate section. A large secondary crack which had developed parallel to the main crack in the center of the surface was revealed. The fifth hole was situated at the transition between the supporting bone and the defect and hence stress...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c9001187
EISBN: 978-1-62708-226-6
... Abstract 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...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c9001579
EISBN: 978-1-62708-226-6
... Abstract Stainless steel is frequently used for bone fracture fixation in spite of its sensitivity to pitting and cracking in chloride containing environments (such as organic fluids) and its susceptibility to fatigue and corrosion fatigue. A 316L stainless steel plate implant used for fixation...
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
... Abstract Threads of a bone screw (Co-Cr-Mo alloy, type ASTM F75) had broken off, and other threads had cracked. 15x sectioning showed porosity, and 155x magnification showed gas holes, segregation, and dissolved oxides. This supports the conclusion that manufacturing defects caused the failure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048410
EISBN: 978-1-62708-226-6
... Abstract A narrow bone plate made of type 316 stainless steel and used to stabilize an open midshaft femur fracture failed. A crack at a plate hole next to the fracture site had been revealed by a radiograph taken 13 weeks after the operation. The plate was revealed to be slightly bent...
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
... to degradation (corrosion and wear), bioadhesion (to bones), and ease of manufacture by different thermomechanical processes and availability/low cost [ 3 – 5 ]. The requirements of chemical composition, microstructure and mechanical properties are well established in standards edited by international...
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Published: 01 June 2019
Fig. 1 Scheme of bone fracture and bone plate positioning More
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Published: 01 June 2019
Fig. 7 Internal surface of bone plate (bone side) and fatigue cracks observed (SEM micrographs) More
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Published: 01 January 2002
Fig. 4 Microradiograph from thin section of cortical bone. The varying x-ray density of the Haversian systems and the enlargement of some blood vessel cavities indicate that the bone is in a stage of remodeling. 77× More
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Published: 01 January 2002
Fig. 18 Stainless steel bone plate with fatigue crack and broken screw. (a) Radiograph taken 13 weeks after operation. Anterior-posterior view. Arrows indicate crack in plate and open fracture gap. (b) Corresponding lateral view. Arrow indicates broken screw. (c) Bend in plate More
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Published: 01 January 2002
Fig. 19 Fracture surfaces of the failed screw and bone plate shown in Fig. 18 . (a) Longitudinal section through fractured screw showing edge of fracture surface and high inclusion content. A large slag inclusion was present at the void under the fracture edge. 55×. (b) Fracture surface More
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Published: 01 January 2002
Fig. 28 Fatigue-fracture surface of broken commercially pure titanium bone plate with mixed fracture morphology. (a) Fracture surface shows fatigue striations, terraces, and tearing ridges, depending on the local crystallographic orientation. 250×. (b) Higher magnification view of the area More
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Published: 01 January 2002
Fig. 29 Heavy pitting corrosion on type 304 stainless steel bone screw. (a) Longitudinal section through head of bone screw showing corrosion tunnels. (b) Etched longitudinal section showing the many primary inclusion lines and corrosion tunnels that follow the inclusions. (c) SEM overview More
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Published: 01 January 2002
Fig. 31 Connective tissue near stainless steel bone plate with impregnation of corrosion products. These products are found extracellularly and in the connective tissue cells. 230× More
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Published: 01 January 2002
Fig. 7 Fracture in an orthopedic bone plate. A failure was caused by fretting damage (loss of protective oxide layer) in the countersunk portion of the plate. More
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Published: 01 December 1992
Fig. 1 Cancellous bone screws and the seven-hole narrow dynamic compression plate. More
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Published: 15 January 2021
Fig. 6 Illustration of fretting wear damage between a bone cement and a metallic femoral stem. Adapted from Ref 36 More
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Published: 15 January 2021
Fig. 1 Fish-bone diagram showing the systems, methodologies, equipment, environment, and human factors that can affect variability in mechanical testing More
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Published: 30 August 2021
Fig. 29 Optical microscopy image of part of the fracture surface of a bone fixation plate. Beach marks can be seen in the image emanating from the filleted radius at the top (medial side) of the fixation hole. More
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Published: 30 August 2021
Fig. 30 Scanning electron microscopy image of fracture origin in a bone fixation plate. The black arrow indicates the origin of the fatigue fracture emanating from a filleted radius from one of the fixation holes. More