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      Study of bone-like hydroxyapatite/polyamino acid composite materials for their biological properties and effects on the reconstruction of long bone defects

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          Abstract

          Purpose

          The purpose of this study was to investigate the effect of bone-like hydroxyapatite/polyamino acid (BHA/PAA) in the osteogenesis and reconstruction of long segmental bone defects.

          Methods

          In vitro, MG63 cells were cultured with BHA/PAA. The osteoinductive activity of the BHA/PAA material was evaluated using inverted microscopy, scanning electron microscopy, MTT proliferation assay, and the determination of alkaline phosphatase activity and Ca 2+ content. In vivo, the radial bone defect was made in 20 New Zealand White rabbits, and then these animal were randomly divided into two groups (n=10), the experimental group (with BHA/PAA) and the control group (without BHA/PAA). Postoperatively, the osteogenesis effect of BHA/PAA was evaluated through X-ray, hematoxylin–eosin staining, observation of the gross bone specimen, immunohistochemistry, and fluorescent confocal scanning microscopy.

          Results

          In vitro, BHA/PAA promoted the adhesion, growth, and calcium nodule formation of MG63 cells, and it had good osteogenesis activity. In vivo, with BHA/PAA material degradation and absorption, the new bone gradually formed, and the bone defect gradually recovered in the experimental group. In the control group, a limited bone formation was found at the bone broken ends, and the bone defect was obviously visible.

          Conclusion

          In vitro and in vivo, we confirmed that BHA/PAA was effective in inducing osteogenesis and reconstructing a long segmental bone defect.

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          Most cited references 24

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          Synthetic bone graft substitutes.

          Replacement of extensive local bone loss is a significant clinical challenge. There are a variety of techniques available to the surgeon to manage this problem, each with their own advantages and disadvantages. It is well known that there is morbidity associated with harvesting of autogenous bone graft and limitations in the quantity of bone available. Alternatively allografts have been reported to have a significant incidence of postoperative infection and fracture as well as the potential risk of disease transmission. During the past 30 years a variety of synthetic bone graft substitutes has been developed with the aim to minimize these complications. The benefits of synthetic grafts include availability, sterility and reduced morbidity. The present article examines the relevance of synthetic bone graft substitutes, their mechanical properties and clinical application.
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            Physico-chemistry of initial microbial adhesive interactions--its mechanisms and methods for study.

            In this review, initial microbial adhesive interactions are divided into adhesion to substratum surfaces, coaggregation between microbial pairs and co-adhesion between sessile and planktonic microorganisms of different strains or species. The physico-chemical mechanisms underlying the adhesive interactions are described and a critical review is given of currently employed methods to study microbial adhesive interactions, with an emphasis on the use of the parallel plate flow chamber. Subsequently, for each of the three microbial adhesive interactions distinguished, the role of Lifshitz-van der Waals, acid-base and electrostatic interactions is described based on existing literature.
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              Current approaches to experimental bone grafting.

               Steven Lane,  H Sandhu (1987)
              A number of osteogenic, osteoinductive, and osteoconductive substances currently are being investigated for use in bone repair. It is conceivable that a selected combination of osteogenic cells, osteoinductive factors, and osteoconductive matrices can be combined and fabricated into an implantable material custom-suited to particular clinical demands. Consequently, it is crucial that potential graft substances be experimentally characterized in terms of their precise contribution to the bone-forming mechanisms. In this article, the authors review current areas of research in the realm of experimental grafting, including the current understanding of materials that manifest osteogenic, osteoinductive, or osteoconductive properties.
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                Author and article information

                Journal
                Drug Des Devel Ther
                Drug Des Devel Ther
                Drug Design, Development and Therapy
                Drug Design, Development and Therapy
                Dove Medical Press
                1177-8881
                2015
                17 December 2015
                : 9
                : 6497-6508
                Affiliations
                [1 ]Department of Orthopedics Surgery, The First People’s Hospital of Zunyi City, Zunyi, People’s Republic of China
                [2 ]Department of Orthopedic Surgery, The First Affiliated Hospital, Chongqing Medical University, Chongqing, People’s Republic of China
                Author notes
                Correspondence: Dian-ming Jiang, Department of Orthopedic Surgery, The First Affiliated Hospital, Chongqing Medical University, No 1 Youyi Road, Yuzhong District, Chongqing 400016, People’s Republic of China, Tel +86 139 8383 6636, Fax +86 23 8901 1212, Email jdm571026@ 123456vip.163.com
                Article
                dddt-9-6497
                10.2147/DDDT.S96207
                4687625
                © 2015 Yan and Jiang. This work is published by Dove Medical Press Limited, and licensed under Creative Commons Attribution – Non Commercial (unported, v3.0) License

                The full terms of the License are available at http://creativecommons.org/licenses/by-nc/3.0/. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed.

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                Original Research

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