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Journal of Biomedical Materials Research. Part B, Applied Biomaterials

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https://www.readbyqxmd.com/read/28644564/methacrylate-based-root-canal-sealer-containing-chlorexidine-and-%C3%AE-tricalcium-phosphate
#1
Fabrício Mezzomo Collares, Vicente Castelo Branco Leitune, Fernando Freitas Portella, Paula Dapper Santos, Gabriela de Souza Balbinot, Luís Alberto Dos Santos, Clarissa Cavalcanti Fatturi Parolo, Susana Maria Werner Samuel
The aim of this study was to develop and to characterize a methacrylate-based root canal sealer containing chlorhexidine (CHX) and α-tricalcium phosphate (α-TCP). Experimental dual cure methacrylate-based sealer was produced containing 0, 2.5, or 5 wt% of CHX and 0, 25, or 50 wt% of α-TCP. Experimental sealers were evaluated based on flow, film thickness, radiopacity, degree of conversion (DC), degradation in water, pH and antibacterial activity. Flow ranged from 15.09 ± 0.11 to 17.47 ± 0.42 mm...
June 23, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28644516/hemostatic-efficiency-of-modern-topical-sealants-comparative-evaluation-after-liver-resection-and-splenic-laceration-in-a-swine-model
#2
Hamidreza Fonouni, Arash Kashfi, Ali Majlesara, Oliver Stahlheber, Lukas Konstantinidis, Negin Gharabaghi, Thomas W Kraus, Arianeb Mehrabi, Hani Oweira
Parenchymal transection during hepatobiliary surgery can disrupt small vasculature or bile ducts, which could be managed difficultly. Sealants are helpful tools to achieve better hemostasis. The aim of this study is to analyze the hemostatic efficiency of four modern sealants in a porcine model. In this study, 40 landrace pigs were assigned equally to the control (without sealant) and four sealant groups. Standardized liver resection and splenic lesions were performed and left without using sealant (control) or treated with one of the following sealants: TachoSil(®) , Tissucol Duo(®) , Coseal(®) , and FloSeal(®) ...
June 23, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28639367/a-polydopamine-peptide-coating-enables-adipose-derived-stem-cell-growth-on-the-silicone-surface-of-cochlear-implant-electrode-arrays
#3
Philipp Schendzielorz, Kristen Rak, Katrin Radeloff, Johannes Völker, Thomas Gehrke, Agmal Scherzad, Norbert Kleinsasser, Rudolf Hagen, Andreas Radeloff
The simultaneous application of neurotrophic factors with cochlear implantation is proposed to enhance the bioelectrical interface between electrodes and auditory neurons, and thus improve speech intelligibility in patients with cochlear implants (CIs). In cell-based approaches, the goal is to colonize CIs with cells producing neurotrophic factors. This study aims to evaluate whether a polydopamine (PD) functionalization of the hydrophobic silicone surface of the electrode carrier enables colonization of adipose-derived stem cells known to deliver neurotrophic factors...
June 22, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28636267/strontium-releasing-fluorapatite-glass-ceramics-crystallization-behavior-microstructure-and-solubility
#4
Isabelle Denry, Ourania-Menti Goudouri, Jeffrey D Harless, E M Hubbard, Julie A Holloway
The purpose of this work was to investigate the effect of strontium partial replacement for calcium on the crystallization behavior, microstructure and solubility of fluorapatite glass-ceramics. Four glass compositions were prepared with increasing amounts of strontium partially replacing calcium. The crystallization behavior was analyzed by differential scanning calorimetry and X-ray diffraction (XRD). The microstructure was investigated by scanning electron microscopy. The chemical solubility was quantified according to ISO standard 10993-14...
June 21, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28636252/influence-of-analyzed-lubricant-volumes-on-the-amount-and-characteristics-of-generated-wear-particles-from-three-different-types-of-polyethylene-liner-materials
#5
Jana Markhoff, Carmen Zietz, Christian Fabry, Gerhard Fulda, Rainer Bader
The articulating components of artificial joints consist mainly of metals, ceramics, or polymers. Resulting abrasive wear particles can promote osteolysis and aseptic loosening of the endo-prosthetic implants. Ultra-high-molecular-weight-polyethylene is the material used most for bearing couples in total hip replacement. In the present study, three types of polyethylene (PE) liners varying in material composition, i.e., (1) conventional PE (C-PE), (2) sequentially cross-linked PE (SX-PE), (3) cross-linked PE blended with vitamin E (EX-PE) articulating with two types of femoral heads were used...
June 21, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28636168/improved-hemodialysis-with-hemocompatible-polyethersulfone-hollow-fiber-membranes-in-vitro-performance
#6
Surendra Kumar Verma, Akshay Modi, Atul Kumar Singh, Rohit Teotia, Jayesh Bellare
We show that addition of nanozeolite (NZ) and vitamin E D-α-Tocopherol polyethylene glycol succinate (TPGS or T) considerably improves the performance of polyethersulfone (PES or P) hollow fiber membrane (HFM) for hemodialysis. Nanocomposite HFMs were manufactured using PES as a polymer, TPGS as an additive and NZ as a filler to give a composite membrane called PT-NZ. HFMs were spun by dry-wet spinning principle based on liquid-liquid phase separation. TPGS and NZ were successfully incorporated in HFMs, as confirmed by EDX elemental mapping...
June 21, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28636123/sem-imaging-of-the-stimulatory-response-of-raw264-7-cells-against-porphyromonas-gingivalis-using-a-simple-technique-employing-new-conductive-materials
#7
Chisato Takahashi, Yoshiki Umemura, Ayako Naka, Hiromitsu Yamamoto
In the medical biology, it is essential to understand not only biological morphology but also the interaction between biological materials and agents. To study these, electron microscopy (EM) is often utilized. However, sample preparation techniques for EM require a high level of skill and a considerable time. Here, we conducted EM using a simple technique employing a conductive liquid, BEL-1, and compared the results with another simple technique employing an ionic liquid, 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF4 ])...
June 21, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28631360/reduced-cell-attachment-to-poly-2-hydroxyethyl-methacrylate-coated-ventricular-catheters-in-vitro
#8
Brian W Hanak, Chia-Yun Hsieh, William Donaldson, Samuel R Browd, Kenneth K S Lau, William Shain
The majority of patients with hydrocephalus are dependent on ventriculoperitoneal shunts for diversion of excess cerebrospinal fluid. Unfortunately, these shunts are failure-prone and over half of all life-threatening pediatric failures are caused by obstruction of the ventricular catheter by the brain's resident immune cells, reactive microglia and astrocytes. Poly(2-hydroxyethyl methacrylate) (PHEMA) hydrogels are widely used for biomedical implants. The extreme hydrophilicity of PHEMA confers resistance to protein fouling, making it a strong candidate coating for ventricular catheters...
June 20, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28580771/in-vitro-oxidative-degradation-of-a-spinal-posterior-dynamic-stabilization-device
#9
Bernard M Lawless, Daniel M Espino, Duncan E T Shepherd
This study quantified the changes of the frequency-dependant viscoelastic properties of the BDyn (S14 Implants, Pessac, France) spinal posterior dynamic stabilization (PDS) device due to in vitro oxidation. Six polycarbonate urethane (PCU) rings and six silicone cushions were degraded using a 20% hydrogen peroxide/0.1 M cobalt (II) chloride hexahydrate, at 37°C, for 24 days. The viscoelastic properties of the individual components and the components assembled into the BDyn PDS device were determined using Dynamic Mechanical Analysis at frequencies from 0...
June 5, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28580765/in-vitro-evaluation-of-a-basic-fibroblast-growth-factor-containing-hydrogel-toward-vocal-fold-lamina-propria-scar-treatment
#10
Josh D Erndt-Marino, Andrea C Jimenez-Vergara, Patricia Diaz-Rodriguez, Jonathan Kulwatno, Juan Felipe Diaz-Quiroz, Susan Thibeault, Mariah S Hahn
Scarring of the vocal fold lamina propria can lead to debilitating voice disorders that can significantly impair quality of life. The reduced pliability of the scar tissue-which diminishes proper vocal fold vibratory efficiency-results in part from abnormal extracellular matrix (ECM) deposition by vocal fold fibroblasts (VFF) that have taken on a fibrotic phenotype. To address this issue, bioactive materials containing cytokines and/or growth factors may provide a platform to transition fibrotic VFF within the scarred tissue toward an anti-fibrotic phenotype, thereby improving the quality of ECM within the scar tissue...
June 5, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28580716/preparation-and-characterization-of-injectable-pmma-strontium-substituted-bioactive-glass-bone-cement-composites
#11
I Goñi, R Rodríguez, I García-Arnáez, J Parra, M Gurruchaga
In most minimally-invasive procedures used to address severe pain arising from compression fractures of the vertebral bodies, such as percutaneous vertebroplasty (PVP), a poly(methyl methacrylate) (PMMA) bone cement is used. Shortcomings of this type of cement, such as high exotherm temperature and lack of bioactivity, are well known. We prepared different formulations of a composite bone cement, whose solid constituents consisted of PMMA beads and particles of a bioactive glass (BG), where 0-20%(w/w) of the calcium component was substituted by strontium...
June 5, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28580629/three-dimensional-patterning-in-biomedicine-importance-and-applications-in-neuropharmacology
#12
REVIEW
Ajay Vikram Singh, Tanmay Gharat, Madu Batuwangala, Byung-Wook Park, Thomas Endlein, Metin Sitti
Nature manufactures biological systems in three dimensions with precisely controlled spatiotemporal profiles on hierarchical length and time scales. In this article, we review 3D patterning of biological systems on synthetic platforms for neuropharmacological applications. We briefly describe 3D versus 2D chemical and topographical patterning methods and their limitations. Subsequently, an overview of introducing a third dimension in neuropharmacological research with delineation of chemical and topographical roles is presented...
June 5, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28577328/human-embryonic-stem-cell-dispersion-in-electrospun-pcl-fiber-scaffolds-by-coating-with-laminin-521-and-e-cadherin-fc
#13
Mattias Leino, Carolina Astrand, Nanayaa Hughes-Brittain, Brendan Robb, Robert McKean, Véronique Chotteau
Advances in human pluripotent cell cultivation and differentiation protocols have led to production of stem cell-derived progenitors as a promising cell source for replacement therapy. Three-dimensional (3-D) culture is a better mimic of the natural niche for stem cells and is widely used for disease modeling. Here, we describe a nonaggregate culture system of human embryonic stem cells inside electrospun polycaprolactone (PCL) fiber scaffolds combined with defined extracellular proteins naturally occurring in the stem cell niche...
June 3, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28577315/multiscale-regeneration-scaffold-in-vitro-and-in-vivo
#14
Haiping Chen, Shikun Xie, Yuanmo Yang, Jing Zhang, Zhuangya Zhang
Biocompatible scaffolds play an important role in modulating tissue growth. A gelatin and sodium alginate scaffold with a unique structure produced by a combination of 3-D printing, electrospinning, and vacuum freeze-drying has been developed for tissue engineering. The scaffold is composed of a macrostructure, a honeycomb microporous surface morphology, and nanofibers. This structure meets the design criteria for an ideal tissue engineering scaffold. The scaffold degrades and has low cytotoxicity. The biocompatibility of the scaffold is improved by the favorable cell-matrix interaction; cells attach to the scaffold well and secrete large amounts of extracellular matrix in vitro...
June 3, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28570023/strength-toughness-and-reliability-of-a-porous-glass-biopolymer-composite-scaffold
#15
Qiang Fu, Weitao Jia, Grace Y Lau, Antoni P Tomsia
Development of bioactive glass and ceramic scaffolds intended for the reconstruction of large segmental bone defects remains a challenge for materials science due to the complexities involved in clinical implantation, bone-implant reaction, implant degradation and the multiple loading modes the implants subjected to. A comprehensive evaluation of the mechanical properties of inorganic scaffolds and exploration of new ways to toughen brittle constructs are critical prior to their successful application in loaded sites...
June 1, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28561998/deposition-of-mannose-binding-lectin-and-ficolins-and-activation-of-the-lectin-pathway-of-complement-on-the-surface-of-polyurethane-tubing-used-for-cardiopulmonary-bypass
#16
Łukasz Eppa, Izabela Pągowska-Klimek, Anna S Świerzko, Maciej Moll, Wojciech R Krajewski, Maciej Cedzyński
The artificial surface used for cardiopulmonary bypass (CPB) is a crucial factor activating the complement system and thus contributing to the generation of a systemic inflammatory response. The activation of classical and alternative pathways on this artificial surface is well known. In contrast, lectin pathway (LP) activation has not been fully investigated, although noted during CPB in several studies. Moreover, we have recently proved the contribution of the LP to the generation of the systemic inflammatory response syndrome after pediatric cardiac surgery...
May 31, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28561993/removable-partial-denture-alloys-processed-by-laser-sintering-technique
#17
Omar Alageel, Mohamed-Nur Abdallah, Ammar Alsheghri, Jun Song, Eric Caron, Faleh Tamimi
Removable partial dentures (RPDs) are traditionally made using a casting technique. New additive manufacturing processes based on laser sintering has been developed for quick fabrication of RPDs metal frameworks at low cost. The objective of this study was to characterize the mechanical, physical, and biocompatibility properties of RPD cobalt-chromium (Co-Cr) alloys produced by two laser-sintering systems and compare them to those prepared using traditional casting methods. The laser-sintered Co-Cr alloys were processed by the selective laser-sintering method (SLS) and the direct metal laser-sintering (DMLS) method using the Phenix system (L-1) and EOS system (L-2), respectively...
May 31, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28561991/development-of-a-novel-bioactive-glass-suitable-for-osteosarcoma-related-bone-grafts
#18
Alireza Rahimnejad Yazdi, Lawrence Torkan, Stephen D Waldman, Mark R Towler
In this study, zinc borate-based glasses with increasing gallium content (0, 2.5, 5, 10, and 15 wt % Ga) were synthesized and their effect on the viability and proliferation of preosteoblasts and osteosarcoma cancer cells were investigated. Methyl thiazolyl tetrazolium (MTT) cell viability assays using glass degradation extracts revealed that the extracts from glasses with lower Ga contents could enhance the viability of preosteoblasts, while extracts from the glass composition with 15 wt % Ga caused statistically significant reduction of their viability...
May 31, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28561950/poly-n-4-aminobutyl-acrylamide-as-mimetic-polylysine-for-improving-survival-and-differentiation-of-cerebellar-granule-neurons
#19
Yu-Hsin Wang, Shao-Hsuan Chang, Daxen Mau-Hsu, Jyh-Horng Wang, Tai-Horng Young
Poly(N-(4-aminobutyl)-acrylamide) (P4Am) and poly-d-lysine (PDL) possess the same butylamine side chain. The main difference is the peptide structure, which is in the main chain of PDL but in the side chain of P4Am. PDL has been extensively used in the preparation of neuronal cultures. We assumed neurons are sensitive enough to distinguish such structure difference so these two cationic polymers were compared at serial coating concentrations for culturing cerebellar granule neurons from 7-day-old Wistar rats in this study...
May 31, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28561919/current-trends-and-future-perspectives-of-dental-pulp-capping-materials-a-systematic-review
#20
REVIEW
Wellington L O da Rosa, Alexandra R Cocco, Tiago M da Silva, Luana C Mesquita, Arthur Dias Galarça, Adriana F da Silva, Evandro Piva
To systematically review the literature to analyze the current trends and future perspectives of dental pulp capping materials through an analysis of scientific and technological data. This study is reported in accordance with the PRISMA Statement. Nine databases were screened: PubMed (MedLine), Lilacs, IBECS, BBO, Web of Science, Scopus, SciELO, Google Scholar, and The Cochrane Library. Additionally, the following patent applications were searched online in Questel Orbit (Paris, France), USPTO, EPO, JPO, INPI, and Patentscope databases...
May 31, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
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