Bio-Medical Materials and Engineering - Volume 15, issue 3
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The aim of
Bio-Medical Materials and Engineering is to promote the welfare of humans and to help them keep healthy. This international journal is an interdisciplinary journal that publishes original research papers, review articles and brief notes on materials and engineering for biological and medical systems.
Articles in this peer-reviewed journal cover a wide range of topics, including, but not limited to: Engineering as applied to improving diagnosis, therapy, and prevention of disease and injury, and better substitutes for damaged or disabled human organs; Studies of biomaterial interactions with the human body, bio-compatibility, interfacial and interaction problems; Biomechanical behavior under biological and/or medical conditions; Mechanical and biological properties of membrane biomaterials; Cellular and tissue engineering, physiological, biophysical, biochemical bioengineering aspects; Implant failure fields and degradation of implants. Biomimetics engineering and materials including system analysis as supporter for aged people and as rehabilitation; Bioengineering and materials technology as applied to the decontamination against environmental problems; Biosensors, bioreactors, bioprocess instrumentation and control system; Application to food engineering; Standardization problems on biomaterials and related products; Assessment of reliability and safety of biomedical materials and man-machine systems; and Product liability of biomaterials and related products.
Abstract: Local bone loss after implantation of traditional stem‐type prostheses remains an unsolved problem during the long‐term application of total hip replacement. The stress shielding effect and osteolysis were thought to be the two main factors that result in local bone loss after prosthesis implantation. A newly designed stemless cervico‐trochanteric (C‐T) prosthesis was thus developed to reduce stress shielding and osteolysis caused by the implantation of conventional stem‐type prosthesis. Eight synthetic femora were implanted with C‐T and porous coated anatomic (PCA) prostheses. Under 2,000‐Newton load, the surface strains of proximal femora were compared between the intact, PCA press‐fit femora and the…C‐T implanted femora with three different fixation modes: two‐screw fixation, three‐screw fixation, and three‐screw combined with cement fixation. The results revealed that stress shielding in the C‐T implanted femora was significantly eliminated compared to that of the PCA implanted femora (p<0.01). No statistical difference in strain magnitude was found for the C‐T implanted femora among the three different fixation modes (p>0.1). The C‐T implanted femur has more physiological strain distribution. Moreover, from the C‐T prosthetic characteristic design, the localized osteolysis would be also reduced due to the overall coverage of neck‐trochanteric area. The newly designed C‐T prosthesis may be a useful alternative to the traditional stem‐type prosthesis in the future.
Keywords: Hip arthroplasty, stemless prosthesis, strain measurement, stress shielding, osteolysis