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  1. [해외논문]   Editorial Board   SCIE


    Journal of the mechanical behavior of biomedical materials v.81 ,pp. ii - ii , 2018 , 1751-6161 ,

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  2. [해외논문]   High performance resorbable composites for load-bearing bone fixation devices   SCIE

    Heimbach, Bryant (Department of Biomedical Engineering, University of Connecticut, United States ) , Tonyali, Beril (Department of Materials Science and Engineering, University of Connecticut, 97 North Eagleville Rd, Unit 3136, Storrs, CT 06269, United States ) , Zhang, Dianyun (Department of Mechanical Engineering, University of Connecticut, 191 Auditorium Road, Unit 3139, Storrs, CT 06269-3139, United States ) , Wei, Mei (Department of Biomedical Engineering, University of Connecticut, United States)
    Journal of the mechanical behavior of biomedical materials v.81 ,pp. 1 - 9 , 2018 , 1751-6161 ,

    초록

    Abstract Bone fractures are some of the most common injuries annually, and many require a fixation device to help properly heal. The present study focuses on developing a bioresorbable composite that has high strength and stiffness for bone fixation applications. To achieve this, a design of experiments was performed, testing the effect of long fiber reinforcement type, matrix type, matrix amount, and particle reinforcement amount on the flexural properties of the composite. Based on these results, the ideal resorbable long fiber reinforcement, particle reinforcement, and matrix material are degummed silk fibroin, hydroxyapatite, and polylactic acid, respectively. Through further optimizations of the particle reinforcement phase a flexural modulus and strength of 13.7 GPa and 437 MPa, respectively, was achieved. Both values are among the highest found in literature, with the strength far exceeding the requirement for a fixation device and the highest for such a bioresorbable composite material, showing great promise for use as a bioresorbable fixation device. Graphical abstract [DISPLAY OMISSION]

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  3. [해외논문]   Study on titanium-magnesium composites with bicontinuous structure fabricated by powder metallurgy and ultrasonic infiltration   SCIE

    Jiang, S. (Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, School of Materials Science and Engineering, Harbin Institute of Technology, P.O. Box 433, Harbin 150001, PR China ) , Huang, L.J. (State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, P.O. Box 433, Harbin 150001, PR China ) , An, Q. (Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, School of Materials Science and Engineering, Harbin Institute of Technology, P.O. Box 433, Harbin 150001, PR China ) , Geng, L. (State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, P.O. Box 433, Harbin 150001, PR China ) , Wang, X.J. (Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, School of Materials Science and Engineering, Harbin Institute of Technology, P.O. Box 433, Harbin 150001, PR China ) , Wang, S. (Key Laboratory of Advanced Structural-Functional Integration Materials & Green Man)
    Journal of the mechanical behavior of biomedical materials v.81 ,pp. 10 - 15 , 2018 , 1751-6161 ,

    초록

    Abstract Titanium-magnesium (Ti-Mg) composites with bicontinuous structure have been successfully fabricated by powder metallurgy and ultrasonic infiltration for biomaterial potential. In the composites, Ti phase is distributed continuously by sintering necks, while Mg phase is also continuous, distributing at the interconnected pores surrounding the Ti phase. The results showed that the fabricated Ti-Mg composites exhibited low modulus and high strength, which are very suitable for load bearing biomedical materials. The composites with 100 μm and 230 μm particle sizes exhibited Young's modulus of 37.6 GPa and 23.4 GPa, 500.7 MPa and 340 MPa of compressive strength and 631.5 MPa and 375.2 MPa of bending strength, respectively. Moreover, both of the modulus and strength of the composites increase with decreasing of Ti particle sizes. In vitro study has been done for the preliminary evaluation of the Ti-Mg composites.

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  4. [해외논문]   Strength and fracture mechanism of iron reinforced tricalcium phosphate cermet fabricated by spark plasma sintering   SCIE

    Tkachenko, Serhii (CEITEC - Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic ) , Horynová (CEITEC - Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic ) , , Miroslava (CEITEC - Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic ) , Casas-Luna, Mariano (CIITEC - Centro de Investigación e Innovación Tecnológica, Instituto Politécnico Nacional, Mexico City, Mexico ) , Diaz-de-la-Torre, Sebastian (Faculty of Civil Engineering, Brno University of Technology, Brno, Czech Republic ) , Dvoř (CEITEC - Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic ) , á (CEITEC - Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic ) , k, Karel (CEITEC - Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic) , Celko, Ladislav , Kaiser, Jozef , Montufar, Edgar B.
    Journal of the mechanical behavior of biomedical materials v.81 ,pp. 16 - 25 , 2018 , 1751-6161 ,

    초록

    Abstract The present work studies the microstructure and mechanical performance of tricalcium phosphate (TCP) based cermet toughened by iron particles. A novelty arises by the employment of spark plasma sintering for fabrication of the cermet. Results showed partial transformation of initial alpha TCP matrix to beta phase and the absence of oxidation of iron particles, as well as a lack of chemical reaction between TCP and iron components during sintering. The values of compressive and tensile strength of TCP/Fe cermet were 3.2 and 2.5 times, respectively, greater than those of monolithic TCP. Fracture analysis revealed the simultaneous action of crack-bridging and crack-deflection microstructural toughening mechanisms under compression. In contrast, under tension the reinforcing mechanism was only crack-bridging, being the reason for smaller increment of strength. Elastic properties of the cermet better matched values reported for human cortical bone. Thereby the new TCP/Fe cermet has potential for eventual use as a material for bone fractures fixation under load-bearing conditions. Highlights SPS improves the contact and anchorage of the Fe reinforcements with the TCP matrix. Addition of Fe increases 3.2 and 2.5 times the compressive and tensile strength of TCP. The main toughening mechanism in tension and compression is crack-bridging. In compression also crack-deflection toughening increases the strength of TCP. Fracture morphology of Fe in tension is dimpling while in compression is shear bands. Graphical abstract [DISPLAY OMISSION]

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  5. [해외논문]   Titanium surface bio-functionalization using osteogenic peptides: Surface chemistry, biocompatibility, corrosion and tribocorrosion aspects   SCIE

    Trino, Luciana D. (São Paulo State University (Unesp), School of Sciences, Bauru, SP 17033-360, Brazil ) , Bronze-Uhle, Erika S. (São Paulo State University (Unesp), School of Sciences, Bauru, SP 17033-360, Brazil ) , Ramachandran, Amsaveni (Department of Oral Biology, College of Dentistry, University of Illinois at Chicago, Chicago, IL, 60612, USA ) , Lisboa-Filho, Paulo N. (São Paulo State University (Unesp), School of Sciences, Bauru, SP 17033-360, Brazil ) , Mathew, Mathew T. (Department of Biomedical Sciences, College of Medicine at Rockford, University of Illinois-School of Medicine at Rockford, Rockford, IL, 61107-1897, USA ) , George, Anne (Department of Oral Biology, College of Dentistry, University of Illinois at Chicago, Chicago, IL, 60612, USA)
    Journal of the mechanical behavior of biomedical materials v.81 ,pp. 26 - 38 , 2018 , 1751-6161 ,

    초록

    Abstract Titanium (Ti) is widely used in biomedical devices due to its recognized biocompatibility. However, implant failures and subsequent clinical side effects are still recurrent. In this context, improvements can be achieved by designing biomaterials where the bulk and the surface of Ti are independently tailored. The conjugation of biomolecules onto the Ti surface can improve its bioactivity, thus accelerating the osteointegration process. Ti was modified with TiO 2 , two different spacers, 3-(4-aminophenyl) propionic acid (APPA) or 3-mercaptopropionic acid (MPA) and dentin matrix protein 1 (DMP1) peptides. X-ray photoelectron spectroscopy analysis revealed the presence of carbon and nitrogen for all samples, indicating a success in the functionalization process. Furthermore, DMP1 peptides showed an improved coverage area for the samples with APPA and MPA spacers. Biological tests indicated that the peptides could modulate cell affinity, proliferation, and differentiation. Enhanced results were observed in the presence of MPA. Moreover, the immobilization of DMP1 peptides through the spacers led to the formation of calcium phosphate minerals with a Ca/P ratio near to that of hydroxyapatite. Corrosion and tribocorrosion results indicated an increased resistance to corrosion and lower mass loss in the functionalized materials, showing that this new type of functional material has attractive properties for biomaterials application. Highlights An efficient bio-functionalization occurred in the presence of spacers molecules. The peptides formed minerals with a Ca/P ratio near to that of hydroxyapatite. The peptides had a positive influence on osteogenic differentiation. Bio-functionalization increased the resistance to corrosion with lower mass loss. Graphical abstract [DISPLAY OMISSION]

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  6. [해외논문]   The impact of shape memory test on degradation profile of a bioresorbable polymer   SCIE

    Musioł, Marta (Polish Academy of Sciences, Centre of Polymer and Carbon Materials, 34, M. Curie-Skłodowska St., 41-819 Zabrze, Poland ) , Jurczyk, Sebastian (Institute for Engineering of Polymer Materials and Dyes, Paint and Plastics Department in Gliwice, 50A Chorzowska St., 44-100 Gliwice, Poland ) , Kwiecień (Polish Academy of Sciences, Centre of Polymer and Carbon Materials, 34, M. Curie-Skłodowska St., 41-819 Zabrze, Poland ) , , Michał (Polish Academy of Sciences, Centre of Polymer and Carbon Materials, 34, M. Curie-Skłodowska St., 41-819 Zabrze, Poland ) , Smola-Dmochowska, Anna (Polish Academy of Sciences, Centre of Polymer and Carbon Materials, 34, M. Curie-Skłodowska St., 41-819 Zabrze, Poland ) , Domań (Polish Academy of Sciences, Centre of Polymer and Carbon Materials, 34, M. Curie-Skłodowska St., 41-819 Zabrze, Poland ) , ski, Marian (Polish Academy of Sciences, Centre of Polymer and Carbon Materials, 34, M. Curie-Skłodowska St., 41-819 Zabrze, Poland ) , Janeczek, Henryk (Polish Academy of Sciences, Centre of Polymer and Carbon Materials, 34, M. Curie-Skłodowska St., 41-819 Zabrze, Pola) , Włodarczyk, Jakub , Klim, Magdalena , Rydz, Joanna , Kawalec, Michał , Sobota, Michał
    Journal of the mechanical behavior of biomedical materials v.81 ,pp. 39 - 45 , 2018 , 1751-6161 ,

    초록

    Abstract The semicrystalline poly(L-lactide) (PLLA) belongs to the materials with shape memory effect (SME) and as a bioresorbable and biocompatible polymer it have found many applications in medical and pharmaceutical field. Assessment of the SME impact on the polymer degradation profile plays crucial role in applications such as drug release systems or in regenerative medicine. Herein, the results of in vitro degradation studies of PLLA samples after SME full test cycle are presented. The samples were loaded and deformed in two manners: progressive and non-progressive. The performed experiments illustrate also influence of the material mechanical damages, caused e.g. during incorrect implantation of PLLA product, on hydrolytic degradation profile. Apparently, degradation profiles are significantly different for the material which was not subjected to the deformation and the deformed ones. The materials after deformation of 50% (in SME cycle) was characterized by non-reversible morphology changes. The effect was observed in deformed samples during the SME test which were carried out ten times.

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  7. [해외논문]   On the stability efficiency of anchorage self-tapping screws: Ex vivo experiments on miniscrew implants used in orthodontics   SCIE

    Migliorati, Marco (Orthodontics Department, School of Dentistry, University of Genova, largo Rosanna Benzi 10, 16132 Genova, Italy ) , Drago, Sara (Orthodontics Department, School of Dentistry, University of Genova, largo Rosanna Benzi 10, 16132 Genova, Italy ) , Dalessandri, Domenico (Orthodontics Department, School of Dentistry, University of Brescia, piazzale Spedali Civili 1, 25123 Brescia, Italy ) , Lagazzo, Alberto (Section of Materials Engineering, Department of Civil, Chemical and Environmental Engineering (DICCA), University of Genova, via Opera Pia 15, 16145 Genova, Italy ) , Gallo, Fabio (Section of Biostatistics, Department of Health Sciences (DISSAL), University of Genova via Pastore 1, 16132 Genova, Italy ) , Capurro, Marco (Section of Materials Engineering, Department of Civil, Chemical and Environmental Engineering (DICCA), University of Genova, via Opera Pia 15, 16145 Genova, Italy ) , Silvestrini-Biavati, Armando (Orthodontics Department, School of Dentistry, University of Genova, largo Rosanna Benzi 10, 16132 Genova, Italy)
    Journal of the mechanical behavior of biomedical materials v.81 ,pp. 46 - 51 , 2018 , 1751-6161 ,

    초록

    Abstract Background The clinical success of orthodontic miniscrews is strictly related to primary stability, which depends on bone viscoelastic properties too. In this study, we evaluated the short time mechanical response of native bone to miniscrews, by a laboratory test based on dynamic loading. Methods Thirty-six segments of porcine ribs were first scanned by cone-beam computerized tomography to obtain insertion-site cortical thickness, cortical and marrow bone density. Twelve different types of miniscrews were implanted in the bone samples to evaluate the elastic compliance of the implants in response to a point force applied at the screw head normally to the screw axis. The compliance was measured dynamically in a Dynamic Mechanical Analysis apparatus as the Fourier Response Function between the signals of displacement and force. The measurements were repeated in five days successive to the insertion of the miniscrew. Findings The elastic compliance was positively related to observation timepoints, but it was not related neither to the screw type nor to the value of the insertion torque. Interpretation Stability behavior is significantly related to the short time response of native bone rather than to the screw design or the insertion torque values. Highlights A dynamic analysis is necessary to test a viscoelastic material such the bone. Geometry and insertion torque did not influence the early stability of miniscrews. In the initial period after miniscrew placement a torque loss of 38% can be expected.

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  8. [해외논문]   Effects of crystal refining on wear behaviors and mechanical properties of lithium disilicate glass-ceramics   SCIE

    Zhang, Zhenzhen (State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Oral Diseases, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Changle Xi Road 145, Xi'an, Shaanxi, China ) , Guo, Jiawen (State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Oral Diseases, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Changle Xi Road 145, Xi'an, Shaanxi, China ) , Sun, Yali (Zhengzhou Central Hospital Affiliated to Zhengzhou University, Zhengzhou, China ) , Tian, Beimin (State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Oral Diseases, Department of Periodontology, School of Stomatology, Fourth Military Medical University, Changle Xi Road 145, Xi'an, Shaanxi, China ) , Zheng, Xiaojuan (State Key Laboratory of Military Stomatology & National Clinical Research Center for) , Zhou, Ming , He, Lin , Zhang, Shaofeng
    Journal of the mechanical behavior of biomedical materials v.81 ,pp. 52 - 60 , 2018 , 1751-6161 ,

    초록

    Abstract Objectives The purpose of this study is to improve wear resistance and mechanical properties of lithium disilicate glass-ceramics by refining their crystal sizes. Methods After lithium disilicate glass-ceramics (LD) were melted to form precursory glass blocks, bar (N = 40, n = 10) and plate (N = 32, n = 8) specimens were prepared. According to the differential scanning calorimetry (DSC) of precursory glass, specimens G1–G4 were designed to form lithium disilicate glass-ceramics with different crystal sizes using a two-step thermal treatment. In the meantime, heat-pressed lithium disilicate glass-ceramics (GC-P) and original ingots (GC-O) were used as control groups. Glass-ceramics were characterized using X-ray diffraction (XRD) and were tested using flexural strength test, nanoindentation test and toughness measurements. The plate specimens were dynamically loaded in a chewing simulator with 350 N up to 2.4 × 10 6 loading cycles. The wear analysis of glass-ceramics was performed using a 3D profilometer after every 300,000 wear cycles. Wear morphologies and microstructures were analyzed by scanning electron microscopy (SEM). One-way analysis of variance (ANOVA) was used to analyze the data. Multiple pairwise comparisons of means were performed by Tukey's post-hoc test. Results Materials with different crystal sizes (p Conclusions After crystal refining, lithium disilicate glass-ceramic with medium-sized crystals showed the highest wear resistance and mechanical properties. Highlights Lithium disilicate crystal is refined by thermally controlled crystallization. Medium crystal size ceramic shows the highest wear resistance and mechanical properties. Small crystal size ceramic lacking interlocking microstructure shows lower strength. Large crystal size ceramics show lower wear resistance. Graphical abstract [DISPLAY OMISSION]

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  9. [해외논문]   Reinforcing effect of graphene oxide reinforcement on the properties of poly (vinyl alcohol) and carboxymethyl tamarind gum based phase-separated film   SCIE

    Yadav, Indu (Department of Biotechnology and Medical engineering, National Institute of Technology, Rourkela 769008, India ) , Nayak, Suraj K. (Department of Biotechnology and Medical engineering, National Institute of Technology, Rourkela 769008, India ) , Rathnam, V.S. Sharan (Department of Biotechnology and Medical engineering, National Institute of Technology, Rourkela 769008, India ) , Banerjee, Indranil (Department of Biotechnology and Medical engineering, National Institute of Technology, Rourkela 769008, India ) , Ray, Sirsendu S. (Department of Biotechnology and Medical engineering, National Institute of Technology, Rourkela 769008, India ) , Anis, Arfat (SABIC Polymer Research Center, King Saud University, Riyadh 11421, Saudi Arabia ) , Pal, Kunal (Department of Biotechnology and Medical engineering, National Institute of Technology, Rourkela 769008, India)
    Journal of the mechanical behavior of biomedical materials v.81 ,pp. 61 - 71 , 2018 , 1751-6161 ,

    초록

    Abstract The current study deals with the preparation and the characterization of the PVA-CMT-GO films. The PVA-CMT film was translucent in nature and smooth to touch. The addition of GO resulted in the formation of agglomerated structures. XRD studies suggested that the incorporation of GO increased the average crystallite size. The mechanical properties of the films as determined by stress relaxation studies suggested that all the films were viscoelastic in nature. The drug release study showed a decrease in the amount of the drug release with the increase in the GO content. The PVA-CMT-GO films (without drug) showed certain degree of antimicrobial activity owing to the inherent antimicrobial property of GO. The drug loaded films also showed good antimicrobial property. It was found that the prepared films altered the cell proliferation of the human skin keratinocytes in a composition-dependent manner. Highlights Poly(vinyl alcohol) (PVA)-carboxymethyl tamarind (CMT) gum film was prepared. PVA-CMT film was reinforced with graphene oxide (GO) in varied proportions. GO reinforced films showed larger crystallite size and antimicrobial property. Viscoelastic nature of the films were estimated from stress relaxation study. Cell proliferation of keratinocytes was altered by the presence of GO. Graphical abstract [DISPLAY OMISSION]

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  10. [해외논문]   Simulating damage onset and evolution in fully bio-resorbable composite under three-point bending   SCIE

    Gao, Xi (International Doctoral Innovation Centre, University of Nottingham Ningbo China, 315100, China ) , Chen, Menghao (Faculty of Engineering, University of Nottingham, NG7 2RD, United Kingdom ) , Yang, Xiaogang (International Doctoral Innovation Centre, University of Nottingham Ningbo China, 315100, China ) , Harper, Lee (Faculty of Engineering, University of Nottingham, NG7 2RD, United Kingdom ) , Ahmed, Ifty (Faculty of Engineering, University of Nottingham, NG7 2RD, United Kingdom ) , Lu, Jiawa (International Doctoral Innovation Centre, University of Nottingham Ningbo China, 315100, China)
    Journal of the mechanical behavior of biomedical materials v.81 ,pp. 72 - 82 , 2018 , 1751-6161 ,

    초록

    Abstract This paper presents a strain-based damage model to predict the stress-strain relationship and investigate the damage onset and evolution of the fibre and matrix of a fully bio-resorbable phosphate glass fibre reinforced composite under three-point bending. The flexural properties of the composite are crucial, particularly when it is employed as implant for long bone fracture. In the model, the 3D case of the strain and stress was used and the response of the undamaged material was assumed to be linearly elastic. The onset of damage was indicated by two damage variables for the fibre and matrix, respectively. The damage evolution law was based on the damage variable and the facture energy of the fibre and matrix, individually. A finite element (FE) model was created to implement the constitutive model and conduct numerical tests. An auto-adaptive algorithm is integrated in the FE model to improve the convergence. The FE model was capable of predicting the flexural modulus with around 3% relative error, and the flexural strength within 2% relative error in comparison with the experimental data. The numerical indices showed that the top surface of the sample was the most vulnerable under three-point bending. It was also found that the damage initiated in the fibre, was the primary driver for composite failure under three-point bending.

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