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Journal of Applied Biomaterials & Functional Materials

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https://www.readbyqxmd.com/read/28525680/abstracts-from-the-national-biomaterial-congress-sib-24-26-may-2017-milan-italy
#1
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May 19, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28525679/retrospective-evaluation-of-healing-of-periapical-lesions-after-unintentional-extrusion-of-mineral-trioxide-aggregate
#2
Levent Demiriz, Ebru Hazar Bodrumlu
BACKGROUND: During the apexification procedure for teeth with open apices, mineral trioxide aggregate (MTA) may be unintentionally extruded. The aim of the present study was the retrospective evaluation of the healing of periapical lesions in permanent incisor teeth with open apices after the unintentional extrusion of MTA. METHODS: The clinical and radiographic records of 55 maxillary permanent central teeth treated by MTA apexification were evaluated. Filled teeth with unintentionally extruded MTA were selected as group 1 (n = 21), whereas the teeth with no MTA extrusion were selected as group 2 (n = 34)...
May 19, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28525677/nonlinear-optical-properties-of-sodium-copper-chlorophyllin-in-aqueous-solution
#3
Jiangting Li, Yufeng Peng, Xueyun Han, Shaoshuai Guo, Kunning Liang, Minggao Zhang
BACKGROUND: Sodium copper chlorophyllin (SCC), as one of the derivatives of chlorophyll - with its inherent green features; good stability for heat, light, acids and alkalies; unique antimicrobial capability; and particular deodori zation performance - is widely applied in some fields such as the food industry, medicine and health care, daily cosmetic industry etc. SCC, as one of the metal porphyrins, has attracted much attention because of its unique electronic band structure and photon conversion performance...
May 19, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28525675/acellular-dermal-matrix-and-heel-reconstruction-a-new-prospective
#4
Alessandro Scalise, Matteo Torresetti, Federica Verdini, Marianna Capecci, Elisa Andrenelli, Alessandro Mengarelli, Maria Gabriella Ceravolo, Sandro Fioretti, Giovanni Di Benedetto
BACKGROUND: Heel reconstruction represents a challenge for all plastic surgeons due to the anatomical and functional features of this weight-bearing area. In the last decade a combined use of acellular dermal matrices and skin grafts has been proposed as a reliable and less invasive alternative for complex wound management; nevertheless only a few cases have been reported in the literature. METHODS: We describe the long-term outcome of 2 cases of severe degloving trauma of the plantar region with massive soft tissue defects of the foot, that underwent surgical reconstruction with artificial dermis and skin grafts...
May 19, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28525678/feed-forward-control-for-magnetic-shape-memory-alloy-actuators-based-on-the-radial-basis-function-neural-network-model
#5
Miaolei Zhou, Yifan Wang, Rui Xu, Qi Zhang, Dong Zhu
Hysteresis exists in magnetic shape memory alloy (MSMA) actuators, which restricts MSMA actuators' application. To describe hysteresis of the MSMA actuators, a hysteresis model based on the radial basis function neural network (RBFNN) is put forward. Then, an inverse RBFNN model is set up, and it is compared with the inverse model based on the traditional cut-and-try method. Finally, to solve hysteresis of the actuators, an inverse model for MSMA actuators is used to build feed-forward controller. Simulation results show the maximum modeling error for inverse hysteresis model designed by neural network is 0...
May 18, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28525676/dynamic-mechanical-analysis-of-carbon-nanotube-reinforced-nanocomposites
#6
Shiuh-Chuan Her, Kuan-Yu Lin
BACKGROUND: To predict the mechanical properties of multiwalled carbon nanotube (MWCNT)-reinforced polymers, it is necessary to understand the role of the nanotube-polymer interface with regard to load transfer and the formation of the interphase region. The main objective of this study was to explore and attempt to clarify the reinforcement mechanisms of MWCNTs in epoxy matrix. METHODS: Nanocomposites were fabricated by adding different amounts of MWCNTs to epoxy resin...
May 18, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28478617/clinical-biomechanical-and-morphological-assessment-of-anterior-cruciate-ligament-kevlar%C3%A2-based-artificial-prosthesis-in-rabbit-model
#7
Santiago de la Garza-Castro, Carlos E González-Rivera, Félix Vílchez-Cavazos, Rodolfo Morales-Avalos, Francisco J Barrera-Flores, Rodrigo E Elizondo-Omaña, Adolfo Soto-Dominguez, Carlos Acosta-Olivo, Oscar F Mendoza-Lemus
BACKGROUND: The aim of this study was to evaluate the clinical, biomechanical and morphological characteristics of a Kevlar®-based prosthetic ligament as a synthetic graft of the anterior cruciate ligament (ACL) in an experimental animal model in rabbits. METHODS: A total of 27 knees of rabbits randomly divided into 3 groups (control, ACL excision and ACL replacement with a Kevlar® prosthesis) were analyzed using clinical, biomechanical and morphological tests at 6, 12 and 18 weeks postprocedure...
April 28, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28478616/effects-of-surfactants-on-the-preparation-of-mno2-and-its-capacitive-performance
#8
Yin Sun, Hangfei Dang, Naibao Huang, Dongchao Wang, Chenghao Liang
Amorphous hydrated manganese dioxide (MnO2) was prepared as an electrode material for supercapacitors by liquid co-precipitation in the presence of polyvinylpyrrolidone (PVP), polyethylene glycol (PEG) and sodium dodecylbenzenesulfonate (SDBS) respectively. The obtained samples were characterized by x-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HRTEM), and electrochemical methods. Physical characterizations confirmed that the addition of surfactants played an important role in the preparation of MnO2...
April 28, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28478615/effect-of-low-intensity-pulsed-ultrasound-on-osteogenic-human-mesenchymal-stem-cells-commitment-in-a-new-bone-scaffold
#9
Valeria Carina, Viviana Costa, Lavinia Raimondi, Stefania Pagani, Maria Sartori, Elisa Figallo, Stefania Setti, Riccardo Alessandro, Milena Fini, Gianluca Giavaresi
PURPOSE: Bone tissue engineering is helpful in finding alternatives to overcome surgery limitations. Bone growth and repair are under the control of biochemical and mechanical signals; therefore, in recent years several approaches to improve bone regeneration have been evaluated. Osteo-inductive biomaterials, stem cells, specific growth factors and biophysical stimuli are among those. The aim of the present study was to evaluate if low-intensity pulsed ultrasound stimulation (LIPUS) treatment would improve the colonization of an MgHA/Coll hybrid composite scaffold by human mesenchymal stem cells (hMSCs) and their osteogenic differentiation...
April 28, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28430346/facile-synthesis-of-reduced-graphene-oxide-fe3o4-nanocomposite-film
#10
Cunqing Ma, Kaiyu Yang, Lili Wang, Xin Wang
BACKGROUND: This study aims at proposing a facile method to prepare rGO/Fe3O4 composite film with adjusted magnetic properties and electronic conductivity. METHODS: Colloidal solution of graphene oxide (GO)/Fe3O4 nanoparticles (F-NPs) with a size in the range of 20-80 nm were prepared by a solution-blending method and heated step-by-step from room temperature to 60°C, 120°C and 160°C for 12 hours, respectively, to obtain a reduced graphene oxide (rGO)/F-NP composite film...
April 20, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28430345/healing-response-of-rat-pulp-treated-with-an-injectable-keratin-hydrogel
#11
Lavanya Ajay Sharma, Robert M Love, Mohammad A Ali, Ajay Sharma, Soraia Macari, Avadhoot Avadhani, George J Dias
BACKGROUND: Keratin has shown promising outcomes as a biomaterial due to its inherent bioactivity, biocompatibility and regenerative effects. The effect of keratin on repair and regeneration of dental tissues has never been studied before. Current therapies to treat pulp tissues involve its replacement with inert, synthetic materials that do not have a proper biological function, leading to failure and tooth loss. This study aimed to develop a biocompatible keratin hydrogel (KH) suitable for pulp therapies...
April 20, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28430344/surfactant-assisted-synthesis-of-polyvinylpyrrolidone-hydroxyapatite-composites-as-a-bone-filler
#12
Masoumeh Meskinfam Langroudi, Masoud Giahi Saravani, Azita Nouri
BACKGROUND: Different methods have been used to prepare bone-like composites from inorganic nanoparticles embedded in polymeric matrixes to obtain the properties and structures required for bone fillers. METHODS: Bone-like nano-hydroxyapatite (nHA) was synthesized using a biomimetic method, with polyvinylpyrrolidone (PVP) as template and sodium dodecyl sulfate (SDS) as surfactant. RESULTS: The results demonstrated the formation of HA composites and showed that polymer and surfactant as the polymer capsule can be properly used to control the size, shape, morphology and dispersion of HA crystals...
April 11, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28430343/fabrication-and-characterization-of-indium-tin-oxide-films
#13
Shiuh-Chuan Her, Chun-Fu Chang
BACKGROUND: Transparent conducting oxide (TCO) films are of particular interest in the field of optoelectronics, due to the requirement for transparent electrodes in applications such as organic light-emitting diodes, solar cells and so on. The aim of this study was to obtain a better understanding of the effects of preparation temperature on indium tin oxide (ITO) films, to improve their performance for optoelectronic applications. METHODS: ITO films were deposited on glass substrate at different temperatures, using direct current (DC) magnetron sputtering...
April 5, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28362040/alternating-air-medium-exposure-in-rotating-bioreactors-optimizes-cell-metabolism-in-3d-novel-tubular-scaffold-polyurethane-foams
#14
Claudia Tresoldi, Ilaria Stefani, Gaia Ferracci, Serena Bertoldi, Alessandro F Pellegata, Silvia Farè, Sara Mantero
BACKGROUND: In vitro dynamic culture conditions play a pivotal role in developing engineered tissue grafts, where the supply of oxygen and nutrients, and waste removal must be permitted within construct thickness. For tubular scaffolds, mass transfer is enhanced by introducing a convective flow through rotating bioreactors with positive effects on cell proliferation, scaffold colonization and extracellular matrix deposition. We characterized a novel polyurethane-based tubular scaffold and investigated the impact of 3 different culture configurations over cell behavior: dynamic (i) single-phase (medium) rotation and (ii) double-phase exposure (medium-air) rotation; static (iii) single-phase static culture as control...
March 27, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28291900/study-of-mesenchymal-stem-cells-cultured-on-a-poly-lactic-co-glycolic-acid-scaffold-containing-simvastatin-for-bone-healing
#15
Dario Mendes Junior, Juliana A Domingues, Moema A Hausen, Silvia M M Cattani, Aguedo Aragones, Alexandre L R Oliveira, Rodrigo F Inácio, Maria L P Barbo, Eliana A R Duek
BACKGROUND: Tissue engineering is a promising alternative for the development of bone substitutes; for this purpose, three things are necessary: stem cells, a scaffold to allow tissue growth and factors that induce tissue regeneration. METHODS: To congregate such efforts, we used the bioresorbable and biocompatible polymer poly(lactic-co-glycolic acid) (PLGA) as scaffold. For the osteoinductive factor, we used simvastatin (SIM), a drug with a pleiotropic effect on bone growth...
March 8, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28256700/clinical-relevance-of-antimicrobial-testing-results-for-dental-restorative-materials
#16
Cher Farrugia, Julie Haider, Liberato Camilleri, Josette Camilleri
BACKGROUND: The antimicrobial activity of restorative materials is clinically relevant because all dental materials are subject to an environment containing bacteria. This study aimed to investigate the use of 2 methodologies referred to in the literature to assess antimicrobial properties of restorative materials and investigate whether material properties alter results of these traditional methodologies. METHODS: A number of dental restorative materials - namely, Chemfil Superior®, Spectrum®, Heliobond®, Ionoseal®, Dyract Extra®, Smart Dentin Replacement (SDR®) and Biodentine® - were characterized by scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), X-ray diffraction (XRD) analysis, Fourier transform infrared (FT-IR) spectroscopy and pH analysis...
February 28, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28222206/titanium-hydroxyapatite-composites-sintered-at-low-temperature-for-tissue-engineering-in-vitro-cell-support-and-biocompatibility
#17
Romina Comín, Mariana P Cid, Luciano Grinschpun, Carlos Oldani, Nancy A Salvatierra
BACKGROUND: In clinical orthopedics, a critical problem is the bone tissue loss produced by a disease or injury. The use of composites from titanium and hydroxyapatite for biomedical applications has increased due to the resulting advantageous combination of hydroxyapatite bioactivity and favorable mechanical properties of titanium. Powder metallurgy is a simple and lower-cost method that uses powder from titanium and hydroxyapatite to obtain composites having hydroxyapatite phases in a metallic matrix...
February 21, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28165606/effect-of-topical-antiinflammatory-drugs-on-mechanical-behavior-of-rabbit-cornea
#18
Domenico Lepore, Roberto De Santis, Monica M Pagliara, Antonio Gloria, Olimpia Oliviero, Carlo Nucci, Giovanni Improta, Maria Triassi, Luigi Ambrosio
BACKGROUND: A variety of antiinflammatory therapies are employed to promote corneal wound healing. The effects of steroidal and nonsteroidal antiinflammatory drugs on the biomechanical properties of rabbit cornea were investigated over time using tensile tests. METHODS: Full-thickness incisions were made and used to analyze the effects of dexamethasone sodium phosphate 0.1% and diclofenac sodium 0.1% on corneal biomechanical properties during wound healing at 7, 14 and 21 days after surgery...
February 4, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28134971/engineering-thermoplastics-for-additive-manufacturing-a-critical-perspective-with-experimental-evidence-to-support-functional-applications
#19
Gianluca Cicala, Alberta Latteri, Barbara Del Curto, Alessio Lo Russo, Giuseppe Recca, Silvia Farè
BACKGROUND: Among additive manufacturing techniques, the filament-based technique involves what is referred to as fused deposition modeling (FDM). FDM materials are currently limited to a selected number of polymers. The present study focused on investigating the potential of using high-end engineering polymers in FDM. In addition, a critical review of the materials available on the market compared with those studied here was completed. METHODS: Different engineering thermoplastics, ranging from industrial grade polycarbonates to novel polyetheretherketones (PEEKs), were processed by FDM...
January 28, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28127744/electrochemical-anodizing-treatment-to-enhance-localized-corrosion-resistance-of-pure-titanium
#20
Davide Prando, Andrea Brenna, Fabio M Bolzoni, Maria V Diamanti, Mariapia Pedeferri, Marco Ormellese
BACKGROUND: Titanium has outstanding corrosion resistance due to the thin protective oxide layer that is formed on its surface. Nevertheless, in harsh and severe environments, pure titanium may suffer localized corrosion. In those conditions, costly titanium alloys containing palladium, nickel and molybdenum are used. This purpose investigated how it is possible to control corrosion, at lower cost, by electrochemical surface treatment on pure titanium, increasing the thickness of the natural oxide layer...
January 26, 2017: Journal of Applied Biomaterials & Functional Materials
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