Cobalt, Chromium Implant Wear PDF Download
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Author: Hayley Floyd
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Hayley Floyd
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Rocco Varano
Publisher:
ISBN:
Category :
Languages : en
Pages : 358
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Book Description
"The influence of carbon (C) content, microstructure, crystallography and mechanical properties on the wear behaviour of metal-on-metal (MM) hip implants made from commercially available cobalt-chromium-molybdenum (CoCrMo) alloys designated as American Society of Testing and Materials (ASTM) grade F1537, F75 and as-cast were studied in this work. The as-received bars of wrought CoCrMo alloys (ASTM F1537 of either about 0.05% or 0.26% C) were each subjected to various heat treatments to develop different microstructures. Pin and plate specimens were fabricated from each bar and were tested against each other using a linear reciprocating pin-on-plate apparatus in 25% by volume bovine serum solution. The applied normal load was 9.81 N and the reciprocating plate had a sinusoidal velocity with an average speed of 26 mm/s. The wear was measured gravimetrically and it was found to be most strongly affected by alloy C content, irrespective of grain size or carbide morphology. More precisely, the wear behaviour was directly correlated to the dissolved C content of the alloys. Increased C in solid-solution coincided with lower volumetric wear since C helps to stabilize the face-centred cubic (FCC) crystal structure thus limiting the amount of strain induced transformation (SIT) to the hexagonal close-packed crystal structure (HCP). Based on the observed surface twinning in and around the contact zone and the potentially detrimental effect of the HCP phase, it was postulated that the MM wear behaviour of CoCrMo alloys in the present study was controlled by a deformation mechanism, rather than corrosion or tribochemical reactions." --
Author: Richard H. Rothman
Publisher: W.B. Saunders Company
ISBN:
Category : Medical
Languages : en
Pages : 200
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Author: Paul A. Banaszkiewicz
Publisher: Cambridge University Press
ISBN: 1107627362
Category : Medical
Languages : en
Pages : 301
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Book Description
The must-have book for candidates preparing for the oral component of the FRCS (Tr and Orth).
Author: Moeed Akbar
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Xianglin Shi
Publisher: Springer Science & Business Media
ISBN: 1461507936
Category : Science
Languages : en
Pages : 232
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These proceedings focus on the latest research in molecular mechanisms of metal-induced toxicity and carcinogenesis. The conference promoted a multidisciplinary investigative approach and included presentations from international experts on state-of-the-art information in this field.
Author: Charles Rivière
Publisher: Springer Nature
ISBN: 3030242439
Category : Medical
Languages : en
Pages : 346
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Book Description
This open access book describes and illustrates the surgical techniques, implants, and technologies used for the purpose of personalized implantation of hip and knee components. This new and flourishing treatment philosophy offers important benefits over conventional systematic techniques, including component positioning appropriate to individual anatomy, improved surgical reproducibility and prosthetic performance, and a reduction in complications. The techniques described in the book aim to reproduce patients’ native anatomy and physiological joint laxity, thereby improving the prosthetic hip/knee kinematics and functional outcomes in the quest of the forgotten joint. They include kinematically aligned total knee/total hip arthroplasty, partial knee replacement, and hip resurfacing. The relevance of available and emerging technological tools for these personalized approaches is also explained, with coverage of, for example, robotics, computer-assisted surgery, and augmented reality. Contributions from surgeons who are considered world leaders in diverse fields of this novel surgical philosophy make this open access book will invaluable to a wide readership, from trainees at all levels to consultants practicing lower limb surgery
Author: Lars Hjalmarsson
Publisher: Swedish Dental Assn
ISBN: 9789162879235
Category : Medical
Languages : en
Pages : 83
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Author: Ilona Swiatkowska
Publisher: Academic Press
ISBN: 0128217421
Category : Science
Languages : en
Pages : 294
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Book Description
Nearly all orthopaedic surgeons have implanted a cobalt-chromium hip, and most general practitioners have at least one patient with a cobalt-chromium prosthesis on their books. The recent worldwide controversy surrounding metal-on-metal bearings – and increasing concern over the use of metallic biomaterials in general – means that advice on how to manage patients with metal implants is of great interest to these professionals. Specifically, they want to know if there are any diagnostic tests that could be performed to gain clues about implant performance and the risk of local or systemic toxicity. Biomarkers of Hip Implant Function aims to bring together all established and promising new biomarkers and critically evaluate their clinical usefulness. Researchers will benefit from an updated, comprehensive view of the topic to identify underexplored areas. Orthopaedic surgeons and general practitioners will use the book to monitor implant performance and manage their patients. The work may also benefit engineers and joint implant manufacturers by guiding improvements in implant design, and be of interest to regulators and policymakers to inform guidelines on the follow-up of hip implant recipients. Covers all established and candidate biomarkers of hip implant wear, periprosthetic infection, and toxicity Summarises recent research into blood titanium levels associated with well-functioning and malfunctioning hip implants to aid implant revision decisions Reviews over 50 cases of suspected systemic cobalt toxicity to raise awareness of its symptoms and clinical presentation, and guide investigations and treatment decisions
Author: Saverio Affatato
Publisher: Elsevier
ISBN: 0857096125
Category : Technology & Engineering
Languages : en
Pages : 449
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Book Description
Although hip, knee and other orthopaedic implants are well-established prostheses, much remains to be understood about how these implants wear in use. This important book summarises the wealth of recent research in this area and its implications for implant and joint design. After an introductory overview, the book reviews the causes and prevention of implant wear. Part one discusses fundamental issues such as tissue response to wear, the anatomy and biomechanics of hips and knees as well as the materials and design issues they raise for hip, knee and other types of orthopaedic implant. Part two considers wear phenomena in a range of materials, including ultra-high molecular weight (UHMWPE), metal and ceramic joints. It also covers surgical and other factors influencing wear as well as ways of detecting, analysing and predicting implant wear and failure. With its distinguished editor and international team of contributors, Wear of orthopaedic implants and artificial joints is a standard reference for implant manufacturers, surgeons and those researching this important area. Summarises the wealth of recent research into the wear of orthopaedic implants and artificial joints and discusses the implications for implant and joint design Reviews the causes and prevention of implant wear, tissue response to wear, the anatomy and biomechanics of hips and knees and the materials and design issues they raise for orthopaedic implants Considers wear phenomena in a range of materials, including ultra-high molecular weight (UHMWPE), metal and ceramic joints
