Download or read book Bio Tribocorrosion in Biomaterials and Medical Implants written by Yu Yan and published by Elsevier. This book was released on 2013-09-30 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: During their service life, most biomaterials and medical implants are vulnerable to tribological damage. In addition, the environments in which they are placed are often corrosive. The combination of triobology, corrosion and the biological environment has been named ‘bio-tribocorrosion’. Understanding this complex phenomenon is critical to improving the design and service life of medical implants. This important book reviews recent key research in this area. After an introduction to the topography of bio-tribocorrosion, Part one discusses different types of tribocorrosion including fatigue-corrosion, fretting-corrosion, wear-corrosion and abrasion-corrosion. The book also discusses the prediction of wear in medical devices. Part two looks at biological effects on tribocorrosion processes, including how proteins interact with material surfaces and the evolution of surface changes due to bio-tribocorrosion resulting from biofilms and passive films. Part three reviews the issue of bio-tribocorrosion in clinical practice, including dental applications and joint replacement as well the use of coatings and test methods for bio-tribocorrosion. With its international team of contributors, Bio-tribocorrosion in biomaterials and medical implants is a standard reference for those researching and developing medical devices as well as clinicians in such areas as dentistry and orthopaedic surgery. Reviews recent research in bio-tribocorrosion and its role in improving the design and service life of medical implants Discusses types of bio-tribocorrosion including fatigue and wear corrosion Examines biological effects on bio-tribocorrosion processes including interaction of proteins with metal surfaces

Download or read book Bio tribocorrosion in biomaterials and medical implants written by S. Affatato and published by Elsevier Inc. Chapters. This book was released on 2013-09-30 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wear can be defined as a process where interaction between two surfaces or bounding faces of solids within the working environment results in dimensional loss of one solid, with or without any actual decoupling and loss of material. Wear may accelerate corrosion that involves chemical or electrochemical reactions between materials. Both these phenomena fall under the broader category of tribocorrosion. The interactions of mechanical loading and chemical/electrochemical reactions that occur between the elements of a tribological system exposed to biological environments constitute bio-tribocorrosion science.

Download or read book Bio tribocorrosion in biomaterials and medical implants written by J. Geringer and published by Elsevier Inc. Chapters. This book was released on 2013-09-30 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two materials (one being metal) under slight relative motion in a liquid medium are subjected to fretting corrosion. This chapter is dedicated to studying fretting corrosion of implants. After describing the most significant implants subjected to fretting, fretting corrosion is defined. Fretting corrosion is a particular degradation mechanism; it highlights the key role of passive film, crevice corrosion, etc. For demonstrating the electrochemical effect of the fretting corrosion of metal, some investigations are presented at free corrosion potential and at applied potential to measure the specific current density. Moreover, the role of proteins is investigated because they constitute the biological environment and thus play a significant role in fretting corrosion processes. Finally, results from atomic force microscopy (AFM) show the particular debris, size about 100nm. The problem of debris influence is discussed.

Download or read book Bio tribocorrosion in biomaterials and medical implants written by J.J. Ryu and published by Elsevier Inc. Chapters. This book was released on 2013-09-30 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: This chapter discusses synergistic damage mechanisms of modular implants due to mechanical stimulus and electrochemical dissolution. The influences of contact loads, plastic deformation, residual stresses, and environmental conditions are focused to illustrate mechanisms of damage and dissolution. Fretting corrosion is the most prevalent phenomenon that degrades the mechanical and chemical properties of implant materials. It has been explained as an alternating process of fracture and unstable growth of metal oxide film during fatigue contact motion in the corrosive environment. Stress-dependent electrochemical dissolution has also been identified as one of the key mechanisms governing surface degradation in fatigue contact and crevice corrosion of biomedical implants. This damage mechanism incorporates contact-induced residual stress development and stress-assisted dissolution. Understanding of the corrosion damage mechanism of metallic implants is very important in predicting the useful life of implants and optimizing the design of orthopedic implants.

Download or read book Bio tribocorrosion in biomaterials and medical implants written by R.J.K. Wood and published by Elsevier Inc. Chapters. This book was released on 2013-09-30 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: The tribological performance of implant materials within the body where the pH can vary between 7.4 and 4.0, depending on whether the joint is infected or not, is extremely harsh and varies significantly from that experienced in other engineering environments. Three wear mechanisms that affect biomedical and, in particular, orthopaedic implants are regularly reported. These are adhesion, abrasion and fatigue. The wear mechanisms in biomedical implants, particularly hip joints, are reported to be a function of the following variables: type of materials used, contact stresses, lubricants and clearance, surface hardness and roughness, type of articulation due to motion, number of cycles, solution particle count and distribution, and tribocorrosion.

Download or read book Bio tribocorrosion in biomaterials and medical implants written by P. Silva-Bermudez and published by Elsevier Inc. Chapters. This book was released on 2013-09-30 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this chapter, a general overview of current dental implants is presented, identifying weak points where improvements can be made. Particular importance is given to the surface properties of materials susceptible to modifications for improving the biological response for the specific application. Then, the concepts and techniques relevant for the evaluation of the physico-chemical properties and the protein adsorption, biocompatibility, bioactivity and biofilm formation are described. The chapter describes a particular method to modify the chemical and physical properties of materials, known as magnetron sputtering. Finally, an example using Nb2O5 coatings is presented, where also corrosion resistance and adhesion results are included.

Download or read book Bio tribocorrosion in biomaterials and medical implants written by P. Ponthiaux and published by Elsevier Inc. Chapters. This book was released on 2013-09-30 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Articulating systems are complex mechanical systems operating under sliding, rotation, slip, vibrations, weight bearing, and loading conditions. A problem in mechanical systems is the occurrence of tribocorrosion, involving a synergism between corrosion and mechanical wear, and causing increased material degradation. A tribocorrosion protocol allowing separation of the mechanical, corrosive and synergetic contributions to the total loss of material is described, based on electrochemical measurements performed before and during unidirectional sliding. As a case study, the protocol is implemented to test the tribocorrosion resistance of CoCrMo alloys under sliding. The different components of the total wear related to corrosive and mechanical contributions are calculated.

Download or read book Bio tribocorrosion in biomaterials and medical implants written by Y. Takakubo and published by Elsevier Inc. Chapters. This book was released on 2013-09-30 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Total joint replacement (TJR) is one of the success stories of modern medicine, which has reliably provided dramatic pain relief and improved the quality of life for several million patients with a destructive end-stage joint disease. However, the main long-term complication of TJR surgery is prosthetic loosening, often combined with osteolysis following wear, corrosion and failure of the implant. Over the past decade, the biological interactions between various types of wear particles and metal ions from metal-on-polyethylene (MoPE), metal-on-metal (MoM) and ceramic-on-ceramic (CoC) implants, endogenous danger signals (alarmins) and/or bacterial components of the microbiome with the innate and adaptive host defence (immune) system, have become better known. In this chapter, we discuss the role of biomaterials and implant-derived wear and corrosion debris in loosening of TJRs, with particular emphasis on MoM total hip replacements (THR) and hip resurfacing arthroplasty (HRA).

Download or read book Bio tribocorrosion in biomaterials and medical implants written by S. Palaniappan and published by Elsevier Inc. Chapters. This book was released on 2013-09-30 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: In vitro and clinical methods providing data to obtain the wear equations and models for dental composites are summarized. The general criticism about wear equations being less beneficial for practical use for wear prediction is discussed. In general, the objective of this chapter is to find not an alternative to the existing predictive models, but a way of correlating clinical wear observations and results of in vitro models to establish clinical corroboration for the predictive wear models. For future work, analysis of wear patterns in retrieved restorations and artificial neural networks for wear prediction are proposed.

Download or read book Bio tribocorrosion in biomaterials and medical implants written by L.A. Rocha and published by Elsevier Inc. Chapters. This book was released on 2013-09-30 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the oral cavity, materials (including our natural teeth) are exposed to a complex environment, which results in simultaneous mechanical, electrochemical, and microbiological solicitations. Therefore, bio-tribocorrosion is an important cause of degradation of dental materials leading to functional and/or biological detrimental effects due to an increased release of metallic ions and wear debris. This chapter describes the main bio-tribocorrosion phenomena that occur in the oral environment, and discuss the main parameters related to both the materials and the environment affecting bio-tribocorrosion in dental applications.

Download or read book Bio tribocorrosion in biomaterials and medical implants written by C. Valero Vidal and published by Elsevier Inc. Chapters. This book was released on 2013-09-30 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: The influence of protein adsorption on the corrosion behavior of surgical metallic biomaterials is presented in this chapter. The protein structure and the metal ion binding phenomenon are described as the first steps in establishing the degradation mechanisms of biomaterials in body fluids. In addition, the main corrosion mechanisms and the effect of proteins on their thermodynamic and kinetic properties are also considered. Finally, experimental electrochemical techniques used for studying the role of proteins in the degradation mechanisms of implants are analyzed. Future challenges in this field are discussed at the end of the chapter.

Download or read book Bio tribocorrosion in biomaterials and medical implants written by A. Almaguer-Flores and published by Elsevier Inc. Chapters. This book was released on 2013-09-30 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: This chapter first describes the formation, properties, and composition of oral biofilms that can cause periodontal diseases and also serious problems on metallic devices such as dental implants. It includes a description of studies regarding some factors that can influence biofilm formation on a biomaterial surface, such as chemical composition, surface energy, hydrophilicity, and topography. Finally, the chapter points out the importance of understanding the mechanisms of biofilm formation on different biomaterial surfaces, in order to control and prevent the formation of these structures and ensure the long-term successful life of biomedical devices such as dental implants.

Download or read book Bio tribocorrosion in biomaterials and medical implants written by Y. Yan and published by Elsevier Inc. Chapters. This book was released on 2013-09-30 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Total joint replacement (TJR), or joint arthroplasty, is a widely used surgical procedure in which the entire joint is removed and replaced with a prosthetic joint. The most common types of TJR are total hip replacement (THR) and total knee replacement (TKR). The improvement and development of safer, longer lasting and better functioning implants are essential. Recent reports of potential problems caused by ion release in metal-on-metal (MoM) TJRs resulting in the formation of pseudo-tumours therefore need to be properly investigated. This chapter provides an overview of the evolution of TJR, followed by a review of the issues and the science around ion release. The potential corrosion issues and bio-tribocorrosion processes which prevail in TJRs, including orthopaedic implant materials, load-bearing joint replacement materials tribocorrosion, and protein adsorption, are also discussed.

Download or read book Bio tribocorrosion in biomaterials and medical implants written by M.T. Mathew and published by Elsevier Inc. Chapters. This book was released on 2013-09-30 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last few years, tribocorrosion evaluation of artificial joints has become an attractive research area for biomedical scientists and medical professionals. This particular field of study deals with a complex artificial human joint system and many unknown parameters. In this chapter an attempt is made through the perspective of a clinician to bring some insights into this area of research. This chapter addresses the basic tribocorrosion aspects of artificial joints and their clinical implications, beginning with clinical problems, cell responses to the presence of metal particles and ions, and evidence of tribocorrosion from retrieved implants. Then comparisons are made between in vivo and in vitro test conditions, and the complex nature of in vivo joint conditions is discussed. Finally, novel case studies (influence of protein and environment, evidence of synergistic interactions between corrosion and wear) on the research of tribocorrosion of metal-on-metal (MoM) hip joints are also included.

Download or read book Biomaterials and Medical Tribology written by J. Paulo Davim and published by Elsevier. This book was released on 2013-07-31 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: Medical tribology can be defined as the science of tribological phenomena in the human body, both those that naturally occur in the tissues or organs and those that arise after implantation of an artificial device, while biomaterials are inert substances designed to be incorporated into living systems. Biomaterials and medical tribology brings together a collection of high quality articles and case studies focussing on new research and developments in these two important fields. The book provides details of the different types of biomaterial available and their applications, including nanoparticles for biomedical applications, synergism effects during fiction and fretting corrosion experiments, application of biomedical-grade titanium alloys in trabecular bone and artificial joints, fatigue strengthening of an orthopaedic Ti6AI4V alloy, wear determination on retrieved metal-on-metal hip arthoplasty, natural articular joints, the importance of bearing porosity in engineering and natural lubrication, tribological characterization of human tooth enamel, and finally, liposome-based carrier systems and devices used for pulmonary drug delivery. Biomaterials and medical tribology is an essential reference for materials scientists, engineers, and researchers in the field of medical tribology. The title also provides an overview for academics and clinicians in this area.

Download or read book Biotextiles as Medical Implants written by M W King and published by Elsevier. This book was released on 2013-10-31 with total page 739 pages. Available in PDF, EPUB and Kindle. Book excerpt: Textiles play a vital role in the manufacture of various medical devices, including the replacement of diseased, injured or non-functioning organs within the body. Biotextiles as medical implants provides an invaluable single source of information on the main types of textile materials and products used for medical implants. The first part of the book focuses on polymers, fibers and textile technologies, and these chapters discuss the manufacture, sterilization, properties and types of biotextiles used for medical applications, including nanofibers, resorbable polymers and shaped biotextiles. The chapters in part two provide a comprehensive discussion of a range of different clinical applications of biotextiles, including surgical sutures, arterial prostheses, stent grafts, percutaneous heart valves and drug delivery systems.This book provides a concise review of the technologies, properties and types of biotextiles used as medical devices. In addition, it addresses the biological dimension of how to design devices for different clinical applications, providing an invaluable reference for biomedical engineers of medical textiles, quality control and risk assessment specialists, as well as managers of regulatory affairs. The subject matter will also be of interest to professionals within the healthcare system including surgeons, nurses, therapists, sourcing and purchasing agents, researchers and students in different disciplines. Provides an invaluable single source of information on the main types of textile materials and products used for medical implants Addresses the technologies used and discusses the manufacture, properties and types of biotextiles Examines applications of biotextiles as medical implants, including drug delivery systems and stent grafts and percutaneous heart valves

Download or read book Temporomandibular Joint Total Joint Replacement TMJ TJR written by Louis G. Mercuri and published by Springer. This book was released on 2015-12-09 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first text that deals specifically with TMJ TJR. Each chapter is authored by either a basic science researcher or clinician known for their interest and expertise in this field. The text provides the reader with state-of-the-art analysis of all aspects of total temporomandibular joint replacement (TMJ TJR), starting with cutting-edge evidence on the biomechanics of the TMJ. The intriguing history of TMJ TJR is presented to provide an understanding of why some prior TMJ TJR devices failed and how what was learned from those failures has led to the improvements exhibited in present TMJ TJR devices. Expert chapters discuss both stock and custom designs, their indications and contraindications, primary operative techniques, combined TMJ TJR and orthognathic surgical techniques, and the devices' adaption for use as segmental or total mandibular replacement devices after ablative surgery. Clinical outcomes and avoidance as well as management of complications are detailed. Numerous helpful illustrations and radiographs are presented to assist readers in understanding and carrying out the described procedures. Important evidence from both the orthopedic and TMJ TJR literature relating to material sensitivity and mechanical wear will be reported. Finally, the role bioengineered tissue may hold for the future of TMJ TJR will be discussed.