Download or read book Porous Polysulfone Coated Femoral Stems written by NB. Beals and published by . This book was released on 1987 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concerns about the metal ion release, high stiffness, and reduction in stem strength that are associated with porous metal coatings have prompted investigations of a relatively high-strength porous polymeric coating, porous polysulfone (PPSF). The present study was initiated in order to characterize the mechanical properties of PPSF and PPSF-coated titanium alloy and to evaluate the performance of PPSF as a coating on titanium alloy femoral stems in dogs. PPSF with various porosities was fabricated by sintering particles of Union Carbide P-1700 medical-grade polysulfone. Chemical coupling of PPSF to Ti-6Al-4V alloy specimens was achieved using silyl-reactive polysulfone. The shear strength of the PPSF/titanium alloy interface determined from push-out tests on coated cylindrical rods and transverse sections of the coated canine femoral stems was found to exceed 16 MPa. Tension and punch shear tests performed on the PPSF yielded values of 13 and 21 MPa, respectively. The relationship between strength and porosity characteristics was determined. Fatigue tests performed on PPSF-coated titanium femoral stems revealed no failure of the coating up to 1 million cycles. No difference between PPSF-coated and uncoated titanium specimens was found in the fatigue behavior. PPSF-coated titanium alloy canine femoral stems (32% porosity, 246 μm in average pore size) were implanted in 25 dogs. Evidence of loosening was found only in those animals in which the canal/fill ratio was low. No gross radiographic changes were found in the implanted femurs within the two-year postoperative period. Histology showed bone ingrowth fixation of the prostheses. Results of this investigation indicate that PPSF-coated femoral stems warrant continued investigation.
Download or read book Quantitative Characterization and Performance of Porous Implants for Hard Tissue Applications written by Jack E. Lemons and published by ASTM International. This book was released on 1987 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Press Fit on Lateral Stem Stresses and the Integrity of Porous Coated Femoral Prostheses written by M. Bushelow and published by . This book was released on 1987 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: A strain gage analysis was performed to determine the stresses generated on the lateral surface of two types of porous-coated femoral prostheses. One type of prosthesis was made of wrought titanium (Ti-6Al-4V) alloy with a porous polysulfone coating; the other was a porous-coated alloy meeting the requirements of the ASTM Specification for Cast Cobalt-Chromium-Molybdenum Alloy for Surgical Implant Applications (F 75-82). Various degrees of fit were evaluated, ranging from a loose fit to one in which the stem was cemented into the femoral canal. The results showed that modeling pressfit porous-coated stems using cemented conditions can produce peak stresses on the lateral surface of the stem significantly lower than those for noncemented stems. Based on the fatigue strength of the stem material, the authors show that assessing stem integrity with the assumption that the cemented stem represents a complete bone ingrowth condition may lead to a design evaluation of the femoral stem that is overoptimistic for in vivo fatigue load conditions.
Download or read book Technical Principles Design and Safety of Joint Implants written by G. Buchhorn and published by Seattle ; Toronto : Hogrefe & Huber. This book was released on 1994 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: A summary of the state-of-the-art on factors decisive for the safety and long-term function of total joint replacements, in papers from the third Biomaterials Symposium, held in 1987 at the U. of Gottingen, Germany. The volume is divided into sections on requirements on implant security; strength of the biomaterials; tribology of various couplings; shape and dimensions; corrosion and degradation; implant anchorage; bone reaction and bioactivity; custom made implants; manufacturing and quality control; instruments and implant retrieval; clinical experiences, carcinogenicity, and other aspects. For clinicians and researchers from many fields interested in joint replacement. Annotation copyright by Book News, Inc., Portland, OR
Download or read book Advances in Materials Science and Implant Orthopedic Surgery written by R. Kossowsky and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Materials Science and Implant Orthopedic Surgery brings together experts from major university hospitals, materials scientists specializing in bio-materials, and development engineers working for implant manufacturers to address such issues as: mechanisms of fixation; foreign-body immune response; generation and consequences of ionic and wear debris; materials selection, design and manufacturing schemes; and surgical techniques to maximize the safety and efficacy of the devices.
Download or read book Encyclopedic Handbook of Biomaterials and Bioengineering v 1 2 Materials written by Donald Lee Wise and published by CRC Press. This book was released on 1995 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt: Integrating basic science, engineering, and medical applications, this handbook provides a treatment of materials used in or on the human body - ranging from biopolymers for controlled release drug delivery systems to metal plates used in bone repair and absorbable devices such as sutures.
Download or read book First International Conference on Engineering and Clinical Aspects of Endoprosthetic Fixation written by Institution of Mechanical Engineers (Great Britain). Engineering in Medicine Section and published by . This book was released on 1984 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Implant Materials in Biofunction written by Cornelis de Putter and published by Elsevier Publishing Company. This book was released on 1988 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Non cemented Total Hip Arthroplasty written by Robert Hannon Fitzgerald and published by Raven Press (ID). This book was released on 1988 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biomaterials written by S.V. Bhat and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: As biomaterials are used in medical devices, meeting needs in such diverse surgical disciplines as ophthalmology, cardiology, neuromuscular surgery, orthopaedics, dentistry, etc., they must have intimate contact with patient's tissue or body fluids, providing a real physical interface which seriously restricts developments. This book is written for those who would like to advance their knowledge of biomaterials. The subject matter of the book is divided into twelve chapters dealing with the structure and relationship of biological and man-made biomaterials. The application of these materials for various medical devices, and recent developments in tissue engineering, are also discussed.
Download or read book Biomaterials written by Sujata V. Bhat and published by Alpha Science Int'l Ltd.. This book was released on 2005 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: As biomaterials are used in medical devices, providing needs in such diverse surgical disciplines as ophthalmology, cardiology, neuromuscular surgery, orthopedics, dentistry etc., they must have intimate contact with patient's tissue or body fluid providing a real physical interface, which restricts developments most seriously. This book is written for those who would like to advance their knowledge of biomaterials. The subject matter of the book is divided into twelve chapters dealing with structure and relationship of biological and man made biomaterials. The application of these materials for various medical devices and recent developments in tissue engineering has also covered.
Download or read book Bioceramics written by A. Ravaglioli and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: As recently as 20 years ago, ceramics were widely ignored as potential biomaterials. Interest in bioceramics has increased dramatically over the past decade to the point where it is anticipated they will be the materials of choice for many orthopedic, otologic, maxillofacial and dental applications during the decade of the '90s. Alumina ceramics are being used extensively as articulating comJ1onents in total joint prostheses because of Ithe materials low coefficient of friction and excellent wear resistances. Alumina ceramics are also being used in dental and maxillofacial applica tions because of the materials excellent biocompatibility. Because of its ability to chemically bond to bone, hydroxyapatite is rapidly becoming the material of choice for many dental and maxillofacial applications. For the past decade, one of the most widely researched topics in the field of orthopedics has been the clinical evaluation of joint prostheses based upon stabili zation via tissue ingrowth. It appears that the next generation of joint prostheses will be based upon direct chemically bonding to bone using hydroxyapatite, surface-active glass or surface-active glass ceramics coatings. Resorbable bioceramics are limited to temporary bone space fillers, periodontal pockets treatment and resorbable pharma ceutical delivery systems. Bioceramics is a comprehensive reference textbook covering the history of bio ceramics, present status of bioceramics, and prediction for future use of bioceramics. This book will serve as a major reference for students, as well as experienced bio material researchers. The book presents the state-of-the-art of bioceramics as of 1991.
Download or read book Materials Sciences and Implant Orthopedic Surgery written by R. Kossowsky and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combining experts from the medical and materials sciences, the Institute considered current concepts in medical and materials sciences as they relate to implantable prostheses in orthopedic surgical practice. The syllabus included theory and applications of materials properties, physiological function, and host response to metal and non-metal materials. Total hip prostheses are the most common orthopedic device implanted today involved in over 200,000 operations. Failures occur at the rate of 10~-40~ at ~ to 10 years. Failures are due to loosening, infection, fracture of femoral components, or destruction of the pe 1 vi c components .' All these, and other problems related to the implantation of the devices, the surgical procedures, and device pathology, were. discussed in light of current, as well as, emerging technologies and scientific knowledge. Repeatedly, scientists designing prostheses became aware of a lack of understanding of physiological phenomena associated with biocompatibility; the interchange among practising physicians, basic scientists, and pathologists at this Institute was appreciated. We thank all the contributors and participants for their effort. Thanks are also due to the personnel of the Scientific Affairs Division of NATO. The daily routines of running the Institute were greatly facilitated by the efforts of Pedro Cuevas, M.D, Jose Gutierrez Diaz, M.D, and Dr. Hanita Kossowsky. The devoted help of Nir Kossovsky, M.D, in setting the conference and in editing this book, is sincerely appreci ated.
Download or read book Porous Bioactive Materials written by Kai Zhang and published by . This book was released on 2003 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biomaterials Engineering and Devices Human Applications written by Donald L. Wise and published by Springer Science & Business Media. This book was released on 2000-08-01 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: The medical device and drug industries standards in analytical methodology and are consistently among the strongest techno- quality control. logical performers. Materials are a key The users of Biomaterials Engineering ingredient in their dynamic growth. Devel- and Devices: Human Applications will r- opment of these materials is in a constant resent a broad base of backgrounds ranging state of activity, with the challenge of re- from the basic sciences (e. g. , polymer placing old materials that cannot withstand chemistry and biochemistry) to more the tests of time, and the new materials’ applied disciplines (e. g. , mechanical/ needs coming to the forefront in modern chemical engineering, orthopedics, and applications. This new reference text, pharmaceutics). To meet varied needs, each Biomaterials Engineering and Devices: chapter provides clear ancd fully detailed Human Applications, focuses on materials discussions. This in-depth, but practical, used in or on the human body—materials coverage should also assist recent indu- that define the world of “biomaterials. ” ees to the biomaterials circle. The editors Biomaterials Engineering and Devices: trust that this reference textbook conveys Human Applications focuses on mate- the intensity of this fast moving field in an rials development and characterization. enthusastic presentation. Chapters deal with issues in the selection of Donald L. Wise, PHD proper biomaterials from biocompatibility Debra J. Trantolo, PHD to biostability to structure/function relation- Kai-Uwe Lewandrowski, MD ships. Chapters also focus on the use of Joseph D. Gresser, PHD specific biomaterials based on their physio- Mario V.
Download or read book Composites Applications written by Tom Drozda and published by . This book was released on 1989 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapidly growing field of composite materials provides opportunities for the manufacturing engineer in cost savings and wider material selection. Because composites can be tailored to specific mechanical requirements, new application doors will continue to open. It is hope that the publication of the papers in this volume will stir the imagination of the reader to increase the list of composite uses in manufacturing.
Download or read book Metals Abstracts written by and published by . This book was released on 1989 with total page 1440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
