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Journal of Biomedical Materials Research. Part B, Applied Biomaterials

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https://www.readbyqxmd.com/read/28067984/controlled-release-of-clarithromycin-from-plga-microspheres-enhances-bone-regeneration-in-rabbit-calvaria-defects
#1
Ali Alenezi, Yoshihito Naito, Takayuki Terukina, Widyasri Prananingrum, Yohei Jinno, Tatsuaki Tagami, Tetsuya Ozeki, Silvia Galli, Ryo Jimbo
This study evaluated the sustained release effect of clarithromycin-loaded in PLGA microspheres in a rabbit calvaria defect model. Four bone defects (ø5.0) were created in the calvaria of New Zealand White rabbits (n = 21, n = 7/time point). The defects were randomly designated to four groups. Group 1: No augmentation (sham), Group 2: beta-tricalcium phosphate (β-TCP), Group 3: β-TCP with 0.12 µg clarithromycin, and Group 4: β-TCP with 6.12 µg PLGA microspheres loaded with 0.12 µg Clarithromycin...
January 9, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28024095/recent-development-of-transcatheter-closure-of-atrial-septal-defect-and-patent-foramen-ovale-with-occluders
#2
REVIEW
Baiyu Tang, Feng Su, Xiangke Sun, Qin Wu, Quansheng Xing, Suming Li
Atrial septal defect (ASD) and patent foramen ovale (PFO) are common clinical congenital heart defects. As an effective method for the treatment of ASD and PFO, transcatheter closure with occluders presents many advantages, including safety, ease of operation, minimal invasiveness, and reduced complications. This contribution reviews the various types of occluders currently used in clinical applications and under development, including non degradable occluders, partially degradable occluders, and totally degradable occluders...
December 26, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28024094/effect-on-surface-character-and-mechanical-property-of-unsintered-hydroxyapatite-poly-l-lactic-acid-uha-plla-material-by-uv-treatment
#3
Akinori Moroi, Masaki Okuno, Go Kobayashi, Hitoshi Gamo, Izumi Serizawa, Kunio Yoshizawa, Hiroumi Ikawa, Koichiro Ueki
Materials fabricated with unsintered hydroxyapatite/poly-l-lactic acid (uHA/PLLA) exhibit biological activity and biocompatibility, but are also hydrophobic. This hydrophobicity limits the ability of cells or tissues to adhere to the surface of the material and thereby prevents the materials from exhibiting effective biological activity. In this study, we examined the effects of ultraviolet (UV) treatment on the hydrophobicity of uHA/PLLA. We compared the contact angle, mechanical strength, cell attachment, and cell differentiation capacity between untreated uHA/PLLA and uHA/PLLA treated with UV light...
December 26, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27935195/ultrahigh-molecular-weight-polyethylene-graphene-oxide-nanocomposites-wear-characterization-and-biological-response-to-wear-particles
#4
S Suñer, N Gowland, R Craven, R Joffe, N Emami, J L Tipper
In the field of total joint replacements, polymer nanocomposites are being investigated as alternatives to ultrahigh molecular weight polyethylene (UHMWPE) for acetabular cup bearings. The objective of this study was to investigate the wear performance and biocompatibility of UHMWPE/graphene oxide (GO) nanocomposites. This study revealed that low concentrations of GO nanoparticles (0.5 wt %) do not significantly alter the wear performance of UHMWPE. In contrast, the addition of higher concentrations (2 wt %) led to a significant reduction in wear...
December 9, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27925384/co-micellized-pluronic-mixture-with-thermo-sensitivity-and-residence-stability-as-an-injectable-tissue-adhesion-barrier-hydrogel
#5
Se Heang Oh, Jun Goo Kang, Jin Ho Lee
Although the tissue adhesion which leads to various complications frequently occurs after surgery, the development of an ideal tissue adhesion barrier is still a challenge. In this study, a thermo-sensitive hydrogel, which can fulfill the essential requirements of tissue adhesion barrier (that is, ease of handling for surgeon, flowing down prevention after application, stable residence on the injury during wound healing, and no use of toxic additives), was developed using biocompatible polyethylene glycol-polypropylene glycol copolymers (Pluronic F127/F68/P123 mixture)...
December 7, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27910198/degradation-and-biocompatibility-of-photoembossed-plga-acrylate-blend-for-improved-cell-adhesion
#6
Nanayaa F Hughes-Brittain, Lin Qiu, Wen Wang, Ton Peijs, Cees W M Bastiaansen
We have shown previously that PMMA-acrylate photopolymers are biocomopatible and can exhibit improved cell adhesion compared to PMMA, due to an increase in negative surface charge caused by UV radiation PLGA has been used widely in soft tissue regeneration due to its high biocompatibility and cell adhesion. This polymer is also biodegradable and can be utilised in the field of vascular regeneration. In this study, PLGA is blended with a triacrylate monomer (TPETA) to create a degradable photopolymer blend. Surface relief structures are formed on this PLGA-TPETA by photoembossing...
December 2, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27898194/inflammatory-cell-induced-corrosion-in-total-knee-arthroplasty-a-retrieval-study
#7
Arianna Cerquiglini, Johann Henckel, Harry S Hothi, Anna Di Laura, John A Skinner, Alister J Hart
Metal release in patients with joint replacements is associated with local tissue reactions, pain, and ultimately revision of implants. One of the causes of this metal loss is speculated to be due to a mechanism of inflammatory cell-induced corrosion (ICIC). In this knee retrieval study, we aimed to: (1) identify the extent and location of ICI corrosion patterns on our femoral and tibial components and (2) correlate our findings with implant and clinical information. We investigated 28 femoral and 9 tibial components made of polished CoCr for presence of ICIC, using macroscopic and microscopic screening and statistical analyses to identify any significant correlations between our results and clinical information...
November 29, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27898187/tissue-engineering-acellular-scaffolds-the-significant-influence-of-physical-and-procedural-decellularization-factors
#8
F Starnecker, F Koenig, C Hagl, N Thierfelder
The importance of decellularized medical products has significantly increased during the last years. In this paper, we evaluated the effects of selected physical and procedural decellularization (DC) factors with the aim to systematically assess their influence on DC results. 72 porcine aortic walls (AW) were divided into three groups and exposed to a DC solution for 4 h and 8 h, either continuously or in repeated cycles. The AW were rocked (90bpm), whirled (10 l/min), sonicated (120W, 45 kHz) or exposed to a combination of these treatments, followed by 10 washing cycles...
November 29, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27889952/effects-of-different-doses-of-2-3-dimercaptosuccinic-acid-modified-fe2-o3-nanoparticles-on-intercalated-discs-in-engineered-cardiac-tissues
#9
Yongchao Mou, Shuanghong Lv, Fei Xiong, Yao Han, Yuwei Zhao, Junjie Li, Ning Gu, Jin Zhou
Although iron oxide nanoparticles (IRONs) were applied in clinical magnetic resonance imaging in vivo and magnetic tissue engineering in vitro widely, the underlying effects of IRONs on the development of cardiomyocytes especially the intercellular junctions, intercalated discs (IDs), remain an unknown issue. Given the critical role of three-dimensional (3D) engineered cardiac tissues (ECTs) in evaluation of nanoparticles toxicology, it remained necessary to understand the effects of IRONs on IDs assembly of cardiomyocytes in 3D environment...
November 27, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27889939/the-performance-of-cpc-plga-and-bio-oss-%C3%A2-for-bone-regeneration-in-healthy-and-osteoporotic-rats
#10
Claire I A van Houdt, Dietmar J O Ulrich, John A Jansen, Jeroen J J P van den Beucken
The current study aimed to evaluate the biological performance of calcium phosphate cement (CPC) with polylactic-co-glycolic acid (PLGA) micro-particles and Bio-Oss(®) in ovariectomized and healthy rats. Thirty-two Wistar rats received alternating experimental CPC/PLGA and Bio-Oss(®) in femoral condyle defects in both femurs 6 weeks after ovariectomy (OVX, n = 16) or sham operation (SHAM, n = 16). Six weeks after OVX or SHAM surgery, bone morphology was analyzed by in vivo computed tomography (CT) to confirm osteoporotic bone condition...
November 27, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27889932/interaction-of-hepes-buffer-with-glass-ceramic-scaffold-can-hepes-replace-tris-in-sbf
#11
Dana Rohanová, Diana Horkavcová, Laine Paidere, Aldo Roberto Boccaccini, Pavlína Bozděchová, Petr Bezdička
An international standard (ISO: 23317:2014) exists for the in vitro testing of inorganic biomaterials in simulated body fluid (SBF). This standard uses TRIS buffer to maintain neutral pH in SBF, but in our previous paper, we showed that the interaction of a tested glass-ceramic material with TRIS can produce false-positive results. In this study, we evaluated whether the HEPES buffer, which also belongs to the group of Good's buffers, would be more suitable for SBF. We compared its suitability in two media: SBF with HEPES and demineralized water with HEPES...
November 27, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27886447/synthesis-of-novel-quaternary-silica-hybrid-bioactive-microspheres
#12
A Angelopoulou, E Κ Efthimiadou, G Kordas
PURPOSE: To survey the preparation of novel hybrid microspheres of quaternary silicate glassy composition (SiO2 P2 O5 CaONa2 O) and the prospect of using them as an osteogenic system with enhanced bioactive properties for the development of hydroxyapatite. METHOD: In line with our previous synthetic procedure a two-step process was followed, wherein polystyrene (PS) microspheres were prepared by the emulsifier free-emulsion polymerization method and constituted the core for the sol-gel coating of the silicate inorganic shell...
November 25, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27875037/preparation-of-chitosan-amino-multiwalled-carbon-nanotubes-nanocomposite-beads-for-bilirubin-adsorption-in-hemoperfusion
#13
Wenhui Zong, Jian Chen, Wenyan Han, Jie Chen, Yue Wang, Weichao Wang, Guanghui Cheng, Lailiang Ou, Yaoting Yu
Chitosan-carbon nanotube composite beads combines the advantages of chitosan in forming a stable biocompatible framework and carbon nanotube that provide nanometer effects (high strength and high specific surface area etc.). In this study, chitosan/amino multiwalled carbon nanotubes (CS/AMWCNT) composite beads was prepared by phase-inversion method, in which CS and AMWCNT was crosslinked by ethylene glycol diglycidyl ether (EGDE). The CS/AMWCNT nanocomposite beads produced has been characterized by BET, SEM, TGA, and Raman spectroscopy which exhibited enhanced thermal stability due to the incorporation of AMWCNT...
November 22, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27875036/drug-loaded-nanoparticle-coating-on-totally-bioresorbable-plla-stents-to-prevent-in-stent-restenosis
#14
Jian Zhao, Zhichao Mo, Fangfang Guo, Donglu Shi, Qian Qian Han, Qing Liu
Biodegradable polymer poly (dl-lactide) (PDLLA) has been used as drug coating material for drug-eluting stents due to its excellent biocompatibility and sustained drug release ability. However, the uniform thin layer drug eluting coating on a stent not only inhibits the blood vessel's smooth muscle cell overgrowth but also delay the endotheliation process which is often associated with the occurrence of acute thrombosis. Therefore, in this study, we developed a novel coating method using PDLLA nanoparticles (NPs) as a coating to overcome this issue...
November 22, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27875027/tribology-of-flexible-and-sliding-spinal-implants-development-of-experimental-and-numerical-models
#15
Sophie Le Cann, Julien Chaves-Jacob, Jean-Marie Rossi, Jean-Marc Linares, Patrick Chabrand
New fusionless devices are being developed to get over the limits of actual spinal surgical treatment, based on arthrodesis. However, due to their recentness, no standards exist to test and validate those devices, especially concerning the wear. A new tribological first approach to the definition of an in vitro wear protocol to study wear of flexible and sliding spinal devices is presented in this article, and was applied to a new concept. A simplified synthetic spine portion (polyethylene) was developed to reproduce a simple supra-physiological spinal flexion (10° between two vertebrae)...
November 22, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27860210/limitation-of-the-antibiotic-eluting-bone-graft-substitute-an-example-of-gentamycin-impregnated-calcium-sulfate
#16
Chang-Chin Wu, Yang-Kai Huang, Wei-Jen Chang, Yun-Ching Wu, Chen-Chie Wang, Kai-Chiang Yang
Patients with inadequate volume of alveolar processes or bone defects commonly require graft substitutes in oral, maxillofacial or orthopedic surgery. Ridge augmentation and reconstruction of facial bony defects with bone graft materials achieve better outcomes in functional and aesthetic rehabilitation. The injectable calcium sulfate filler is used widely in intra-operative applications. Calcium sulfate bone filler has been shown to upregulate bone formation-related mRNA genes in vitro and improve osseointegration in vivo...
November 18, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27860159/evaluation-of-corrosion-resistance-of-implant-use-ti-zr-binary-alloys-with-a-range-of-compositions
#17
Teisuke Akimoto, Takeshi Ueno, Yusuke Tsutsumi, Hisashi Doi, Takao Hanawa, Noriyuki Wakabayashi
Although titanium-zirconium (Ti-Zr) alloy has been adopted for clinical applications, the ideal proportion of Zr in the alloy has not been identified. In this study, we investigated the biocompatibility of Ti-Zr alloy by evaluating its corrosion resistance to better understand whether there is an optimal range or value of Zr proportion in the alloy. We prepared pure Ti, Ti-30Zr, Ti-50Zr, Ti-70Zr, and pure Zr (mol% of Zr) samples and subjected them to anodic polarization and immersion tests in a lactic acid + sodium chloride (NaCl) solution and artificial saliva...
November 18, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27862947/osteogenic-potential-of-stem-cells-seeded-bioactive-nanocomposite-scaffolds-a-comparative-study-between-human-mesenchymal-stem-cells-derived-from-bone-umbilical-cord-wharton-s-jelly-and-adipose-tissue
#18
Saeid Kargozar, Masoud Mozafari, Seyed Jafar Hashemian, Peiman Brouki Milan, Sepideh Hamzehlou, Mansooreh Soleimani, Mohammad Taghi Joghataei, Mazaher Gholipourmalekabadi, Alireza Korourian, Kazem Mousavizadeh, Alexander M Seifalian
Bone regeneration is considered as an unmet clinical need, the aim of this study is to investigate the osteogenic potential of three different mesenchymal stem cells (MSCs) derived from human bone marrow (BM-MSCs), umbilical cord Wharton's jelly (UC-MSCs), and adipose (AD-MSCs) seeded on a recently developed nanocomposite scaffold (bioactive glass/gelatin) implanted in rat animal models with critical size calvarial defects. In this study, after isolation, culture, and characterization, the MSCs were expanded and seeded on the scaffolds for in vitro and in vivo studies...
November 15, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27862914/in-vivo-biocompatibility-vascularization-and-incorporation-of-integra-%C3%A2-dermal-regenerative-template-and-flowable-wound-matrix
#19
Thomas Später, Florian S Frueh, Wolfgang Metzger, Michael D Menger, Matthias W Laschke
Integra(®) matrix wound dressing (MWD) is used for the reconstruction of full-thickness skin defects. For the treatment of complex wounds, this dermal substitute is available as a flowable wound matrix (FWM) of identical composition. To clarify whether variations in sample preparation and consistency affect the biocompatibility and tissue incorporation, we herein compared MWD and FWM. The matrices were characterized using scanning electron microscopy and histology. Moreover, they were implanted in mouse dorsal skinfold chambers to analyze their in vivo performance over 2 weeks...
November 14, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27801972/development-of-a-chitosan-based-tissue-engineered-renal-proximal-tubule-conduit
#20
I-Ni Chiang, Wan-Chen Huang, Chao-Yuan Huang, Yeong-Shiau Pu, Tai-Horng Young
Renal proximal tubule cells (RPTCs) are responsible for glomerular filtration and maintenance of water/electrolyte balance. To regenerate a proximal tubule, sufficient cell numbers and normal cell function are requisite. Collagen has been routinely used as a substrate for culturing human RPTCs (HRPTCs); however, the role of biomaterials has not been thoroughly explored. In this study, RPTCs retrieved from human nephrectomy/nephroureterectomy specimens were cultivated on chitosan as a substrate in serum-free condition for up to 150 days...
November 1, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
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