Download or read book Hydroxyapatite based Architectured and Nano structured Bioactive Coatings Fabricated by Cold Spray written by Alberto Ion and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cold spray (CS) is considered as a solid-state coating process by impact. As a result, the harmful effects of high-temperature oxidation, evaporation, melting, crystallization, residual thermal stresses, etc., encountered with traditional thermal spray techniques, are minimized or even eliminated. CS can be of interest in the field of biomedical coatings for Bone Tissue Engineering (BTE), namely hydroxyapatite (HAp) coatings. CS can avoid HAps phase transformation into other calcium phosphates (tricalcium phosphate, tetracalcium phosphate, calcium oxide) during the deposition. Our work here first focuses on CS of HAp-based materials while analyzing in details all the CS processing steps (formation of “splats”, adhesion process and further growth process). More specifically, the influence of the raw powder mechanical properties, substrate surface state (i.e. roughness,hardness), CS pressure and stand-off distance between the gun and the substrate, are investigated. Good quality coatings can be obtained while optimizing the aforementioned parameters. It is shown that the build-up of coatings is mostly due to physical phenomena linked to particles packing ability and mechanical anchor on the roughness of the substrate. No consolidation through chemical phenomena is activated leading to coatings with a poor adhesion. Taking advantage of CS, in a second step we extend the approach to novel functionaly-graded enhanced bio-active hybrid coatings introducing whether collagen, bioglass or antimicrobial silver nanoparticles in the HAp feestocks. The as-obtained coatings are then tested at the microstructural, mechanical and biological (in vitro) levels showing good biocompatibility for BTE.
Download or read book Hydroxyapatite Coatings for Biomedical Applications written by Sam Zhang and published by CRC Press. This book was released on 2013-05-14 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydroxyapatite coatings are of great importance in the biological and biomedical coatings fields, especially in the current era of nanotechnology and bioapplications. With a bonelike structure that promotes osseointegration, hydroxyapatite coating can be applied to otherwise bioinactive implants to make their surface bioactive, thus achieving faster healing and recovery. In addition to applications in orthopedic and dental implants, this coating can also be used in drug delivery. Hydroxyapatite Coatings for Biomedical Applications explores developments in the processing and property characterization and applications of hydroxyapatite to provide timely information for active researchers and newcomers alike. In eight carefully reviewed chapters, hydroxyapatite experts from the United States, Japan, Singapore, and China present the latest on topics ranging from deposition processes to biomedical applications in implants and drug delivery. This book discusses: Magnetron sputtering and electrochemical deposition The modification of hydroxyapatite properties by sol–gel deposition to incorporate other elements found in natural bones, such as zinc, magnesium, and fluorine The use of pure hydroxyapatite in drug delivery applications The growth or self-assembly of hydroxyapatite on shape memory alloy Hydroxyapatite composite coatings—with carbon nanotubes, titanium dioxide (TiO2), and others—on the titanium alloy Offering valuable insights and a wealth of data, including numerous tables and figures, this is a rich source of information for research on hydroxyapatite coatings. Each chapter also covers material that provides an accessible stepping stone for those who are new to the field.
Download or read book Bioactive Antibacterial Composite Coatings Deposited By Cold Spray written by Kiran Judd and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Tissue damage, loosening of implants, and the infection of the body are some of the most common complications that arise following surgical procedures. In dental and orthopedic medical implants infections are largely caused by the adhesion and growth of bacteria on the implant surface. Additionally, anatomical differences between the surrounding tissue/bone and the implant material can cause further complications. The usage of biomaterial-based implant coatings has been fundamental to the application of medical implants/devices and have improved mechanical properties. Successful implants must have favorable mechanical properties/wear resistance, provide strong biocompatibility/bioactivity, and display antibacterial properties. To date, bioactive coatings have generally been deposited using thermal spray methods such as plasma spray; however, this method of deposition has led to the melting and degradation of novel bioactive properties of hydroxyapatite (HA) as well as poor coating adhesion. This study discusses a novel approach of depositing biocompatible, bioactive, and antibacterial coatings well below their melting point using the cold spray process. The cold spray process was used to deposit composite powders with 70 wt% titanium (Ti), 20 wt% hydroxyapatite (HA), and 10 wt% chitosan (CS) onto aluminum 6061 (Al6061) substrates. The effect of process parameters was examined and the goal was to achieve antibacterial well-bonded coatings. The biofunctionality and corrosion resistance was investigated by a bacterial cellular assay and corrosion testing in the simulated body fluid (SBF) Hank's Balanced Salt Solution (HBSS). These tests compared the bacterial and corrosion resistance of composite coatings with commonly used implant substrate materials. The preliminary results indicate the phase composition of the Ti and HA remained the same before and after coating deposition. However, it is inconclusive whether CS particles remained in the same phase following deposition. Porous Ti/HA/CS coatings were obtained with more than double the porosity of Ti/HA coatings. Microstructural characterization and phase analysis of feedstock powders and as-deposited coatings was carried out using Field Emission Scanning Electron Microscope/Energy-Dispersive X-ray Spectroscopy (FESEM/EDS) and X-ray Powder Diffraction (XRD). The addition of the CS in the coating offered no improved antibacterial properties when compared to plain Al6061, 316 stainless steel (SS316), and titanium-6 aluminum-4 vanadium (Ti-6Al-4V) substrate samples. The reason for this lack of protection is still being investigated and could be attributed to a change in phase during the application or an insignificant amount of CS depositing.
Download or read book Nanostructured Hydroxyapatite Coatings for Improved Adhesion and Corrosion Resistance for Medical Implants written by Zongtao Zhang and published by . This book was released on 2001 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydroxyapetite (HA) coating on medical implant has been used in commercial application for several decades. The coating, commercially made by thermal spray method, functions as a intermediate layer between human tissues and the metal implant. The coating can speed up early stage healing after operation but the life span is much limited by low interfacial bond strength, which comes from the dissolution of amorphous HA in human body fluid during its service. This amorphous phase is formed in coating process under high temperature. To overcome these problems, we have developed a novel room temperature electrophoretic deposition process to fabricate nanostructured HA coating. This nanostructured HA coating significantly improved coating's bond strength up to 50-60 MPa, 2-3 times better than the thermal sprayed HA coating. The nanostructured HA coating also has corrosion resistance 50-100 times higher than the conventional HA coating. X-ray diffraction shows that all the HA coating is fully crystalline phase. It is expected that the implants with the nanostructured HA coating will have much longer service life. Other benefits derived from this process include room temperature deposition, the ability to control the coating microstructure and phases, and low cost for production.
Download or read book Introduction To Bioceramics An 2nd Edition written by Larry L Hench and published by World Scientific Publishing Company. This book was released on 2013-05-06 with total page 621 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the second edition of the classic book An Introduction to Bioceramics which provides a comprehensive overview of all types of ceramic and glass materials that are used in medicine and dentistry. The enormous growth of the field of bioceramics is due to the recognition by the medical and dental community of the importance of bioactive materials to stimulate repair and regeneration of tissues. This edition includes 21 new chapters that document the science and especially the clinical applications of the new generation of bioceramics in the field of tissue regeneration and repair. Important socioeconomic factors influencing the economics and availability of new medical treatments are covered with updates on regulatory procedures for new biomaterials, methods for technology transfer and ethical issues.The book contains 42 chapters that offer the only comprehensive treatment of the science, technology and clinical applications of all types of bioceramic materials used in medicine and dentistry. Each chapter is written by leaders in their specialized fields and is a thorough review of the subject matter, unlike many conference proceedings. All chapters have been edited to reflect the same writing style, making the book an easy read. The completeness of treatment of all types of bioceramics and their clinical applications makes the book unique in the field and invaluable to all readers.
Download or read book Titanium Alloys written by Jan Sieniawski and published by BoD – Books on Demand. This book was released on 2013-05-15 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book contains six chapters and covers topics dealing with biomedical applications of titanium alloys, surface treatment, relationships between microstructure and mechanical and technological properties, and the effect of radiation on the structure of the titanium alloys.
Download or read book Advances in Calcium Phosphate Biomaterials written by Besim Ben-Nissan and published by Springer Science & Business. This book was released on 2014-04-17 with total page 559 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Calcium Phosphate Biomaterials presents a comprehensive, state-of-the-art review of the latest advances in developing calcium phosphate biomaterials and their applications in medicine. It covers the fundamental structures, synthesis methods, characterization methods, and the physical and chemical properties of calcium phosphate biomaterials, as well as the synthesis and properties of calcium phosphate-based biomaterials in regenerative medicine and their clinical applications. The book brings together these new concepts, mechanisms and methods in contributions by both young and “veteran” academics, clinicians, and researchers to forward the knowledge and expertise on calcium phosphate and related materials. Accordingly, the book not only covers the fundamentals but also open new avenues for meeting future challenges in research and clinical applications. Besim Ben-Nissan is a Professor of Chemistry and Forensic Science at the University of Technology, Sydney, Australia
Download or read book Bioceramic Coatings for Medical Implants written by Robert B. Heimann and published by John Wiley & Sons. This book was released on 2015-05-26 with total page 493 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reflecting the progress in recent years, this book provides in-depth information on the preparation, chemistry, and engineering of bioceramic coatings for medical implants. It is authored by two renowned experts with over 30 years of experience in industry and academia, who know the potentials and pitfalls of the techniques concerned. Following an introduction to the principles of biocompatibility, they present the structures and properties of various bioceramics from alumina to zirconia. The main part of the work focuses on coating technologies, such as chemical vapor deposition, sol-gel deposition and thermal spraying. There then follows a discussion of the major interactions of bioceramics with bone or tissue cells, complemented by an overview of the in-vitro testing methods of the biomineralization properties of bioceramics. The text is rounded off by chapters on the functionalization of bioceramic coatings and a look at future trends. As a result, the authors bring together all aspects of the latest techniques for designing, depositing, testing, and implementing improved and novel bioceramic coating compositions, providing a full yet concise overview for beginners and professionals.
Download or read book Frattura ed Integrit Strutturale Annals 2012 written by Francesco Iacoviello and published by Gruppo Italiano Frattura. This book was released on 2012-10-03 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydroxyapatite HAp for Biomedical Applications written by Michael Mucalo and published by Elsevier. This book was released on 2015-03-06 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydroxyapatite in the form of hydroxycarbonate apatite is the principal mineral component of bone tissue in mammals. In Bioceramics, it is classed as a bioactive material, which means bone tissue grows directly on it when placed in apposition without intervening fibrous tissue. Hydroxyapatite is hence commonly used as bone grafts, fillers and as coatings for metal implants. This important book provides an overview of the most recent research and developments involving hydroxyapatite as a key material in medicine and its application. - Reviews the important properties of hydroxyapatite as a biomaterial - Considers a range of specific forms of the material and their advantages - Reviews a range of specific medical applications for this important material
Download or read book Calcium Orthophosphates written by Sergey V. Dorozhkin and published by CRC Press. This book was released on 2012-06-04 with total page 863 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to a great chemical similarity with the biological calcified tissues, many calcium orthophosphates possess remarkable biocompatibility and bioactivity. Materials scientists use this property extensively to construct artificial bone grafts that are either entirely made of or only surface-coated with the biologically relevant calcium orthophospha
Download or read book Coatings for Biomedical Applications written by Mike Driver and published by Elsevier. This book was released on 2012-02-22 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: The biomaterials sector is rapidly expanding and significant advances have been made in the technology of biomedical coatings and materials, which provide a means to improve the wear of joints, change the biological interaction between implant and host and combine the properties of various materials to improve device performance. Coatings for biomedical applications provides an extensive review of coating types and surface modifications for biomedical applications.The first part of the book explores a range of coating types and their biomedical applications. Chapters look at hydrophilic, mineral and pyrolytic carbon coatings in and ex vivo orthopaedic applications and finally at surface modification and preparation techniques. Part two presents case studies of orthopaedic and ophthalmic coatings, and biomedical applications including vascular stents, cardiopulomonary by-pass equipment and ventricular assist devices.With its clear structure and comprehensive review of research, Coatings for biomedical applications is a valuable resource to researchers, scientists and engineers in the biomedical industry. It will also benefit anyone studying or working within the biomedical sector, particularly those specialising in biomedical coatings. - Provides an extensive review of coating types and surface modifications for biomedical applications - Chapters look at hydrophilic coatings for biomedical applications in and ex vivo, mineral coatings for orthopaedic applications, pyrolytic carbon coating and other commonly-used biomedical coatings - Presents case studies of orthopaedic and ophthalmic coatings, and biomedical applications including vascular stents, cardiopulomonary by-pass equipment and ventricular assist devices
Download or read book Handbook of Thermal Spray Technology written by Joseph R. Davis and published by ASM International. This book was released on 2004-01-01 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference covers principles, processes, types of coatings, applications, performance, and testing and analysis of thermal spray technology. It will serve as an introduction and guide for those new to thermal spray, and as a reference for specifiers and users of thermal spray coatings and thermal spray experts. Coverage encompasses basics of th
Download or read book Biomaterials in Clinical Practice written by Fatima Zivic and published by Springer. This book was released on 2017-10-20 with total page 823 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the properties of biomaterials that have found wide clinical applications, while also reviewing the state-of-the-art in the development towards future medical applications, starting with a brief introduction to the history of biomaterials used in hip arthroplasty. The book then reviews general types of biomaterials – polymers, ceramics, and metals, as well as different material structures such as porous materials and coatings and their applications – before exploring various current research trends, such as biodegradable and porous metals, shape memory alloys, bioactive biomaterials and coatings, and nanometals used in the diagnosis and therapy of cancer. In turn, the book discusses a range of methods and approaches used in connection with biomaterial properties and characterization – chemical properties, biocompatibility, in vivo behaviour characterisation, as well as genotoxicity and mutagenicity – and reviews various diagnostic techniques: histopathological analysis, imagining techniques, and methods for physicochemical and spectroscopic characterization. Properties of stent deployment procedures in cardiovascular surgeries, from aspects of prediction, development and deployment of stent geometries are presented on the basis of novel modelling approaches. The last part of the book presents the clinical applications of biomaterials, together with case studies in dentistry, knee and hip prosthesis. Reflecting the efforts of a multidisciplinary team of authors, gathering chemical engineers, medical doctors, physicists and engineers, it presents a rich blend of perspectives on the application of biomaterials in clinical practice. The book will provide clinicians with an essential review of currently available solutions in specific medical areas, also incorporating non-medical solutions and standpoints, thus offering them a broader selection of materials and implantable solutions. This work is the result of joint efforts of various academic and research institutions participating in WIMB Tempus project, 543898-TEMPUS-1-2013-1-ES-TEMPUS-JPHES, "Development of Sustainable Interrelations between Education, Research and Innovation at WBC Universities in Nanotechnologies and Advanced Materials where Innovation Means Business", co-funded by the Tempus Programme of the European Union.
Download or read book Modern Cold Spray written by Julio Villafuerte and published by Springer. This book was released on 2015-08-24 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the current state of the art of the novel cold spray process. Cold spray is a solid state metal consolidation process, which allows engineers to tailor surface and shape properties by optimizing process parameters, powder characteristics and substrate conditions for a wide variety of applications that are difficult or impossible by other techniques. Readers will benefit from this book's coverage of the commercial evolution of cold spray since the 1980's and will gain a practical understanding of what the technology has to offer.
Download or read book Functional Ceramic Coatings written by Bozena Pietrzyk and published by MDPI. This book was released on 2021-05-26 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ceramic materials in the form of coatings can significantly improve the functionality and applications of other engineering materials. Due to a wide range of controllable features and various deposition methods, it is possible to create tailored substrate–coating systems that meet the requirements of modern technologies. Therefore, it is crucial to understand the relationships between the structures, morphology and the properties of ceramic coatings and expand the base of scientific knowledge about them. This book contains a series of fourteen articles which present research on the production and properties of ceramic coatings designed to improve functionality for advanced applications.
Download or read book Bone Tissue Engineering written by Jeffrey O. Hollinger and published by CRC Press. This book was released on 2004-10-14 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focusing on bone biology, Bone Tissue Engineering integrates basic sciences with tissue engineering. It includes contributions from world-renowned researchers and clinicians who discuss key topics such as different models and approaches to bone tissue engineering, as well as exciting clinical applications for patients. Divided into four sections, t
