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Journal of Materials Science. Materials in Medicine

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https://www.readbyqxmd.com/read/28074434/lessons-learned-from-the-world-s-first-successful-penis-allotransplantation
#1
REVIEW
Andre van der Merwe, Amir Zarrabi, Alexander Zühlke, Nicola Barsdorf, Rafique Moosa
We performed a successful penis allotransplantation on 11 December 2014. Sharing the lessons learned might help more patients in need to be treated this way. We divided the project into manageable segments that was each overseen by an expert. The ethical review and conduct paved the way for a publically acceptable and successful project. Screening for a psychological stable recipient is important. The most difficult part of the project was finding a donor penis. This was successfully negotiated with the family of a brain dead donor by creating a neo-phallus for the donor, thereby maintaining the dignity of the donor...
February 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28070692/design-considerations-of-an-analytic-intelligence-for-predicting-the-efficacy-of-tissue-engineered-composites
#2
Gabriela Voskerician
No abstract text is available yet for this article.
February 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28070691/biological-characteristic-effects-of-human-dental-pulp-stem-cells-on-poly-%C3%AE%C2%B5-caprolactone-biphasic-calcium-phosphate-fabricated-scaffolds-using-modified-melt-stretching-and-multilayer-deposition
#3
Natkrita Wongsupa, Thongchai Nuntanaranont, Suttatip Kamolmattayakul, Nuttawut Thuaksuban
Craniofacial bone defects such as alveolar cleft affect the esthetics and functions that need bone reconstruction. The advanced techniques of biomaterials combined with stem cells have been a challenging role for maxillofacial surgeons and scientists. PCL-coated biphasic calcium phosphate (PCL-BCP) scaffolds were created with the modified melt stretching and multilayer deposition (mMSMD) technique and merged with human dental pulp stem cells (hDPSCs) to fulfill the component of tissue engineering for bone substitution...
February 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28070690/reconstruction-of-defects-of-the-trachea
#4
Margot Den Hondt, Jan Jeroen Vranckx
The trachea has a complex anatomy to fulfill its tasks. Its unique fibro-cartilaginous structure maintains an open conduit during respiration, and provides vertical elasticity for deglutition, mobility of the neck and speech. Blood vessels pierce the intercartilaginous ligaments to perfuse the ciliated epithelium, which ensures effective mucociliary clearance. Removal of a tracheal segment affected by benign or malignant disease requires airtight restoration of the continuity of the tube. When direct approximation of both tracheal ends is no longer feasible, a reconstruction is needed...
February 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28044252/antibacterial-activity-and-mechanism-of-ag-zno-nanocomposite-against-anaerobic-oral-pathogen-streptococcus-mutans
#5
Shilei Wang, Jie Wu, Hao Yang, Xiangyu Liu, Qiaomu Huang, Zhong Lu
Dental caries is a widespread disease mainly caused by the anaerobic oral pathogen Streptococcus mutans (S. mutans). Ag/ZnO nanocomposite is an efficient antibacterial agent because of its high antibacterial activity and low cytotoxicity. In this study, rod-like Ag/ZnO nanocomposite was synthesized through a deposition-precipitation method and characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The activity of Ag/ZnO nanocomposite against S. mutans was evaluated by determining the minimal inhibitory concentration, minimum bactericidal concentration and growth inhibition curve...
January 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28025802/the-effect-of-tissue-surface-modification-with-collagenase-and-addition-of-tgf-%C3%AE-3-on-the-healing-potential-of-meniscal-tears-repaired-with-tissue-glues-in-vitro
#6
Agnieszka Izabela Bochyńska, Gerjon Hannink, Renate Verhoeven, Dirk W Grijpma, Pieter Buma
The aim of the current in vitro study was to investigate if tissue surface modification with collagenase and addition of the TGF-β3 can increase the number of cells present in meniscus tears repaired with the use of newly developed tissue adhesives based on isocyanate-terminated block copolymers. Cylindrical explants were harvested from the inner part of bovine menisci. To simulate a full-thickness tear, the central core of the explants was removed and glued back into the defect, with or without incubation in collagenase solution prior to gluing...
January 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28012155/influence-of-chitosan-chitin-nanofiber-composites-on-cytoskeleton-structure-and-the-proliferation-of-rat-bone-marrow-stromal-cells
#7
Victoria V Kiroshka, Valentina A Petrova, Daniil D Chernyakov, Yulia O Bozhkova, Katerina V Kiroshka, Yulia G Baklagina, Dmitry P Romanov, Roman V Kremnev, Yury A Skorik
Chitosan scaffolds have gained much attention in various tissue engineering applications, but the effect of their microstructure on cell-material spatial interactions remains unclear. Our objective was to evaluate the effect of chitosan-based matrices doping with chitin nano-whiskers (CNW) on adhesion, spreading, cytoskeleton structure, and proliferation of rat bone marrow stromal cells (BMSCs). The behavior of BMSCs during culture on chitosan-CNW films was determined by the molecular mass, hydrophobicity, porosity, crosslinking degree, protonation degree and molecular structure of the composite chitosan-CNW films...
January 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28012154/mass-spectrometry-comparison-of-nerve-allograft-decellularization-processes
#8
Alonda C Pollins, Justine S Kim, Richard B Boyer, Wesley P Thayer
Peripheral nerve repair using nerve grafts has been investigated for several decades using traditional techniques such as histology, immunohistochemistry, and electron microscopy. Recent advances in mass spectrometry techniques have made it possible to study the proteomes of complex tissues, including extracellular matrix rich tissues similar to peripheral nerves. The present study comparatively assessed three previously described processing methods for generating acellular nerve grafts by mass spectrometry...
January 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28012153/zero-valent-zinc-nanoparticles-promote-neuroglial-cell-proliferation-a-biodegradable-and-conductive-filler-candidate-for-nerve-regeneration
#9
Umran Aydemir Sezer, Kevser Ozturk, Basak Aru, Gulderen Yanıkkaya Demirel, Serdar Sezer, Mehmet Recep Bozkurt
Regeneration of nerve, which has limited ability to undergo self-healing, is one of the most challenging areas in the field of tissue engineering. Regarding materials used in neuroregeneration, there is a recent trend toward electrically conductive materials. It has been emphasized that the capacity of conductive materials to regenerate such tissue having limited self-healing ability improves their clinical utility. However, there have been concerns about the safety of materials or fillers used for conductance due to their lack of degradability...
January 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28000114/evaluation-of-a-laminin-alginate-biomaterial-adipocytes-and-adipocyte-derived-stem-cells-interaction-in-animal-autologous-fat-grafting-model-using-7-tesla-magnetic-resonance-imaging
#10
Yo-Shen Chen, Yu-Sheng Hsueh, Yen-Yu Chen, Cheng-Yu Lo, Hao-Chih Tai, Feng-Huei Lin
Biomaterials are often added to autologous fat grafts both as supporting matrices for the grafted adipocytes and as cell carrier for adipose-derived stem cells (ADSCs). This in vivo study used an autologous fat graft model to test a lamininalginate biomaterial, adipocytes, and ADSCs in immune-competent rats. We transplanted different combinations of shredded autologous adipose tissue [designated "A" for adipose tissue]), laminin-alginate beads [designated "B" for bead], and ADSCs [designated "C" for cell]) into the backs of 15 Sprague-Dawley rats...
January 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28000113/adhesion-and-differentiation-of-saos-2-osteoblast-like-cells-on-chromium-doped-diamond-like-carbon-coatings
#11
Elena Filova, Marta Vandrovcova, Miroslav Jelinek, Josef Zemek, Jana Houdkova, Jan Remsa, Tomas Kocourek, Lubica Stankova, Lucie Bacakova
Diamond-like carbon (DLC) thin films are promising for use in coating orthopaedic, dental and cardiovascular implants. The problem of DLC layers lies in their weak layer adhesion to metal implants. Chromium is used as a dopant for improving the adhesion of DLC films. Cr-DLC layers were prepared by a hybrid technology, using a combination of pulsed laser deposition (PLD) from a graphite target and magnetron sputtering. Depending on the deposition conditions, the concentration of Cr in the DLC layers moved from zero to 10...
January 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28000112/aldehyde-reduction-in-a-novel-pericardial-tissue-reduces-calcification-using-rabbit-intramuscular-model
#12
Hao Shang, Steven M Claessens, Bin Tian, Gregory A Wright
Calcification is a major factor that limits the durability of bioprosthetic valve. A novel bovine pericardial tissue treated with aldehyde capping chemistry and glycerolization was evaluated for its resistance to calcification in comparison with porcine tissues treated with amino oleic acid and bovine pericardial tissue with ethanol rinsing in a rabbit intramuscular model. Tissue discs from the test and control tissues were implanted in rabbits for 60 days. The explanted discs were subject to X-ray imaging, calcium quantification and histology analysis...
January 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/27995493/expression-of-cd68-positive-macrophages-in-the-use-of-different-barrier-materials-to-prevent-peritoneal-adhesions-an-animal-study
#13
Christoph Brochhausen, Volker H Schmitt, Andreas Mamilos, Christine Schmitt, Constanze N E Planck, Taufiek K Rajab, Helmut Hierlemann, C James Kirkpatrick
In preventing postoperative adhesion formation the optimal barrier material has still not been found. It is therefore imperative to assess the biocompatibility of potential barrier devices. Macrophages play a decisive role in the regulation of wound healing, tissue regeneration and foreign body reaction. Since the number of CD68-positive macrophages represents an important parameter within biomaterial testing, in the present study it was analysed whether a correlation exists between the total number of CD68-positive macrophages and the extent of fibrosis or inflammation in peritoneal adhesion prevention using biomaterials...
January 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/27995492/synthesis-and-characterization-of-plga-collagen-composite-scaffolds-as-skin-substitute-produced-by-electrospinning-through-two-different-approaches
#14
Ali Reza Sadeghi-Avalshahr, Mohammad Khorsand-Ghayeni, Samira Nokhasteh, Amir Mahdi Molavi, Hojjat Naderi-Meshkin
Skin damage can occur for many reasons, including burns and injuries, which in extreme cases can even lead to death. Different methods such as electrospinning are used to produce scaffolds used in skin tissue engineering. Natural and synthetic polymers were used in this method. It was observed that the use of both natural and synthetic polymers gives better results for cell culturing rather than using of each material solely. In this study, scaffolds of poly(lactic-co-glycolic acid) and collagen were prepared using coating and common solvent methods...
January 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/27995491/preparation-and-characterization-of-laser-melted-mg-sn-zn-alloys-for-biomedical-application
#15
Cijun Shuai, Yuanzhuo Zhou, Xin Lin, Youwen Yang, Chengde Gao, Xiong Shuai, Hong Wu, Xinyan Liu, Ping Wu, Pei Feng
The rapid degradation rate of Magnesium (Mg) alloy limits its biomedical application even though it possesses outstanding biological performance and biomechanical compatibility. In this study, a combined method of laser rapid melting and alloying Zinc (Zn) was proposed to decrease the degradation rate of Mg-Sn alloy. The microstructure, degradation behaviors and mechanical properties of the laser-melted Mg-5Sn-xZn (x = 0, 2, 4, 6 and 8 wt.%) alloys were investigated. The results indicated that the grain size of the alloys decreased with increasing Zn content, due to the increased number of nucleation particles formed in the process of solidification...
January 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/27995490/hydrogel-tissue-expanders-for-stomatology-part-i-methacrylate-based-polymers
#16
Jakub Hrib, Jakub Sirc, Petr Lesny, Radka Hobzova, Miroslava Duskova-Smrckova, Jiri Michalek, Roman Smucler
In order to create a soft tissue surplus, implantable volume expanders are often utilized in dental surgery. Implanted tissue expanders should gradually increase their volume, exerting a constant pressure on the surrounding tissue for weeks. Current tissue expanders are based predominantly on externally inflatable balloons or on osmotically active tissue expanders that use soft hydrogels wrapped in perforated plastic coatings, which limit fluid entry and swelling. We have designed and examined tissue expanders based on the controlled rate expansive hydrogels synthesized from copolymers of selected methacrylates and N-vinylpyrrolidone, cross-linked with a combination of non-degradable (glycol dimethacrylates) and hydrolytically degradable (N,O-dimethacryloylhydroxylamine) cross-linkers...
January 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/27943066/antibacterial-and-anticancerous-drug-loading-kinetics-for-10-x-cuo-xzno-20cao-60sio2-10p2o5-2%C3%A2-%C3%A2-%C3%A2-x%C3%A2-%C3%A2-%C3%A2-8-mesoporous-bioactive-glasses
#17
Shikha Garg, Swati Thakur, Aayush Gupta, Gurbinder Kaur, Om Prakash Pandey
In the present study, antibacterial and anticancerous drug loading kinetics for the (10-x)CuO-xZnO-20CaO-60SiO2-10P2O5 (2≤x≤8, varying in steps of 2) mesoporous bioactive glasses (MBGs) have been studied. XRD analysis of the as prepared glass samples proved its amorphous nature. Scanning electron microscopy (SEM) revealed the apatite layer formation on the surface of the MBGs after soaking for 15 days in SBF. Ion dissolution studies of calcium, phosphorous and silicon have been performed using inductively coupled plasma (ICP)...
January 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/27915402/an-easy-to-use-wound-dressing-gelatin-bioactive-nanoparticle-gel-and-its-preliminary-in-vivo-study
#18
Chen Wang, Feiyan Zhu, Yang Cui, Huihui Ren, Yue Xie, Ailing Li, Lijun Ji, Xiaozhong Qu, Dong Qiu, Zhenzhong Yang
Beyond promoting hard tissue repairing, bioactive glasses (BGs) have also been proved to be beneficial for wound healing. Nano-scale BGs prepared by sol-gel method were found to have a better performance as they have a larger specific surface area. In this work, bioactive nanoparticles (nBPs) with mean diameter of 12 nm (BP-12) instead of conventional BGs were mixed with gelatin to form an easy-to-use hydrogel as a dressing for skin wound. It was found that the composite of BP-12 and gelatin could form a hydrogel (BP-12/Gel) under 25 °C, which showed pronounced thixotropy at a practically accessible shear rate, therefore become easy to be used for wound cover...
January 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/27896599/inflammatory-cell-response-to-ultra-thin-amorphous-and-crystalline-hydroxyapatite-surfaces
#19
Louise Rydén, Omar Omar, Anna Johansson, Ryo Jimbo, Anders Palmquist, Peter Thomsen
It has been suggested that surface modification with a thin hydroxyapatite (HA) coating enhances the osseointegration of titanium implants. However, there is insufficient information about the biological processes involved in the HA-induced response. This study aimed to investigate the inflammatory cell response to titanium implants with either amorphous or crystalline thin HA. Human mononuclear cells were cultured on titanium discs with a machined surface or with a thin, 0.1 μm, amorphous or crystalline HA coating...
January 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/27896598/bacterial-and-fungal-biofilm-formation-on-anodized-titanium-alloys-with-fluorine
#20
Concepcion Perez-Jorge, Maria-Angeles Arenas, Ana Conde, Juan-Manuel Hernández-Lopez, Juan-Jose de Damborenea, Steve Fisher, Alessandra M Agostinho Hunt, Jaime Esteban, Garth James
Orthopaedic device-related infections are closely linked to biofilm formation on the surfaces of these devices. Several modified titanium (Ti-6Al-4V) surfaces doped with fluorine were studied in order to evaluate the influence of these modifications on biofilm formation by Gram-positive and Gram-negative bacteria as well as a yeast. The biofilm studies were performed according to the standard test method approved by ASTM (Designation: E2196-12) using the Rotating Disk Reactor. Four types of Ti-6Al-4V samples were tested; chemically polished (CP), two types of nanostructures containing fluorine, nanoporous (NP) and nanotubular (NT), and non-nanostructured fluorine containing samples (fluoride barrier layers, FBL)...
January 2017: Journal of Materials Science. Materials in Medicine
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