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https://www.readbyqxmd.com/read/28056710/three-dimensional-printing-of-porous-load-bearing-bioceramic-scaffolds
#1
Elena Mancuso, Naif Alharbi, Oana A Bretcanu, Martyn Marshall, Mark A Birch, Andrew W McCaskie, Kenneth W Dalgarno
This article reports on the use of the binder jetting three-dimensional printing process combined with sintering to process bioceramic materials to form micro- and macroporous three-dimensional structures. Three different glass-ceramic formulations, apatite-wollastonite and two silicate-based glasses, have been processed using this route to create porous structures which have Young's modulus equivalent to cortical bone and average bending strengths in the range 24-36 MPa. It is demonstrated that a range of macroporous geometries can be created with accuracies of ±0...
December 1, 2016: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28056168/conformational-changes-and-competitive-adsorption-between-serum-albumin-and-hemoglobin-on-bioceramic-substrate
#2
Cristina Gruian, Christian Rickert, Sascha Nicklisch, Emilia Vanea, Heinz-Jürgen Steinhoff, Simion Simon
Traditional methods to analyze interactions and conformational changes of proteins adsorbed onto biomaterials are limited by the protein's associations with the substrate material and the complexity of the surrounding media. We used EPR spectroscopy in combination with site directed spin labeling (SDSL) to investigate single protein and competitive adsorption kinetics of horse hemoglobin (Hgb) and bovine serum albumin (BSA) on a silica-calcium-phosphate bioceramic substrate. Combined continuous wave and pulsed (DEER) EPR techniques were employed to monitor local mobility/flexibility changes within the proteins and tertiary structure dynamics upon adsorption...
January 5, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28024584/a-comparative-study-on-the-synthesis-mechanism-bioactivity-and-mechanical-properties-of-three-silicate-bioceramics
#3
Aliakbar Najafinezhad, Majid Abdellahi, Hamid Ghayour, Ali Soheily, Akbar Chami, Amirsalar Khandan
In the present study three akermanite (Ca2MgSi2O7), diopside (CaMgSi2O6) and baghdadite (Ca3ZrSi2O9) applicable bioceramics were synthesized via a sol-gel based method. The combination of sol-gel method and the raw materials used in this study presents a new route for the synthesis of the mentioned bioceramics. By the use of thermal analysis, the mechanisms occurred during the synthesis of these bioceramics were investigated. The differences in the structural density and their relation with the degradation rate and mechanical properties of all three ceramics were studied...
March 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28012416/agarose-encapsulated-mesoporous-carbonated-hydroxyapatite-nanocomposites-powder-for-drug-delivery
#4
Elayaraja Kolanthai, P Abinaya Sindu, K Thanigai Arul, V Sarath Chandra, E Manikandan, S Narayana Kalkura
The powder composites are predominantly used for filling of voids in bone and as drug delivery carrier to prevent the infection or inflammatory reaction in the damaged tissues. The objective of this work was to study the synthesis of agarose encapsulation on carbonated hydroxyapatite powder and their biological and drug delivery properties. Mesoporous, nanosized carbonated hydroxyapatite/agarose (CHAp/agarose) powder composites were prepared by solvothermal method and subsequently calcined to study the physico-chemical changes, if it subjected to thermal exposure...
January 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/27987785/electrophoretic-deposition-of-silica-and-its-composite-coatings-on-ti-6al-4v-and-its-in-vitro-corrosion-behaviour-for-biomedical-applications
#5
M Chellappa, U Vijayalakshmi
Novel bioceramics have an intriguing role in implants and prostheses as surface protecting agents. These bioceramics have promising features such as biocompatible, bioactive, and corrosion-resistant natures. Among bioceramics, silica glass and its composite unravel its better desirability against corrosion and wear with interfacial bone bonding capability in physiological systems by nucleating calcium phosphates over the surface, thereby enhancing the osteoinductive property. In the current study, SiO2 and ZnO were obtained by processing silica and zinc oxide precursors at low temperature using low thermal volatilization sol-gel method...
February 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27987751/study-of-in-vitro-bioactivity-and-mechanical-properties-of-diopside-nano-bioceramic-synthesized-by-a-facile-method-using-eggshell-as-raw-material
#6
Amirhossein Kazemi, Majid Abdellahi, Armina Khajeh-Sharafabadi, Amirsalar Khandan, Neriman Ozada
In this study, diopside bioceramic was synthesized using a mechanical milling process and subsequent heat treatment. The simplicity of experiments and also the high energy available in ball milling lead to rapid synthesis of the products in comparison with other synthesis methods. Magnesium oxide (MgO), silicon dioxide (SiO2) and eggshell (as the calcium source) powders were weighted in stoichiometric conditions and milled to initial activation of the surface of the powder's mixture. Then a sintering process was conducted to complete formation of diopside nanopowder and also evaluates its thermal stability...
February 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27987685/biphasic-calcium-phosphates-bioceramics-ha-tcp-concept-physicochemical-properties-and-the-impact-of-standardization-of-study-protocols-in-biomaterials-research
#7
REVIEW
Mehdi Ebrahimi, Michael G Botelho, Sergey V Dorozhkin
Biphasic calcium phosphates (BCP) bioceramics have become the materials of choice in various orthopedic and maxillofacial bone repair procedures. One of their main advantages is their biodegradation rate that can be modified by changing the proportional ratio of the composition phases. For enhanced bone tissue regeneration, the bioactivity of BCP should be increased by optimizing their physicochemical properties. To date, the ideal physicochemical properties of BCP for bone applications have not been defined...
February 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27987661/a-novel-and-economical-route-for-synthesizing-akermanite-ca2mgsi2o7-nano-bioceramic
#8
Armina Khajeh Sharafabadi, Majid Abdellahi, Amirhossein Kazemi, Amirsalar Khandan, Neriman Ozada
Despite the benefits of akermanite, there are limited reports on making powder and dense bulk akermanite (Ca2MgSi2O7) and most articles have focused on building akermanite scaffolds. This study centers on a new and economical route for the synthesis of akermanite bioceramic via high energy ball milling and subsequent sintering of a mixed powders of eggshell (as calcium source), MgO, and SiO2. The mechanisms occurred during akermanite synthesis were carefully investigated. XRD, DTA, FTIR, TGA, SEM, TEM, ICP and EDS were used for analyzing the obtained results...
February 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27987655/bioactivity-and-biocompatibility-of-hydroxyapatite-based-bioceramic-coatings-on-zirconium-by-plasma-electrolytic-oxidation
#9
Salim Levent Aktuğ, Salih Durdu, Emine Yalçın, Kültigin Çavuşoğlu, Metin Usta
In the present work, hydroxyapatite (HAP)-based plasma electrolytic oxide (PEO) coatings were produced on zirconium at different current densities in a solution containing calcium acetate and β-calcium glycerophosphate by a single step. The phase structure, surface morphology, functional groups, thickness and roughness of the coatings were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), eddy current method and surface profilometer, respectively...
February 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27981198/biphasic-calcium-phosphates-bcp-of-hydroxyapatite-ha-and-tricalcium-phosphate-tcp-as-bone-substitutes-importance-of-physicochemical-characterizations-in-biomaterials-studies
#10
Mehdi Ebrahimi, Michael Botelho
The data presented in this article are related to the research article entitled "Biphasic calcium phosphates bioceramics (HA/TCP): Concept, physicochemical properties and the impact of standardization of study protocols in biomaterials research" [1]. This article provides in depth study of BCP bone substitutes as valuable option in the field of tissue engineering. However, there are discrepancies in the literature regarding the ideal physicochemical properties of BCP and the ideal balance between different phase compositions for enhanced bone tissue engineering (M...
February 2017: Data in Brief
https://www.readbyqxmd.com/read/27977894/synthesis-and-characterization-of-a-novel-scaffold-for-bone-tissue-engineering-based-on-wharton-s-jelly
#11
Cristian Martínez, Carlos Fernández, Miguel Prado, Andres Ozols, Daniel G Olmedo
A composite is a material made of more than one component, and the bond between the components is on a scale larger than the atomic scale. The objective of the present study was to synthesize and perform the structural characterization and biological evaluation of a new biocomposite (BCO) based on a novel combination of an organic and an inorganic phase, for bone tissue engineering applications. The organic phase consisted of Wharton's Jelly (WJ), which was obtained from embryonic tissue following a protocol developed by our laboratory...
December 15, 2016: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/27966877/functionalization-of-the-polymeric-surface-with-bioceramic-nanoparticles-via-a-novel-nonthermal-dip-coating-method
#12
Andri K Riau, Debasish Mondal, Melina Setiawan, Alagappan Palaniappan, Gary H F Yam, Bo Liedberg, Subbu S Venkatraman, Jodhbir S Mehta
The only nonthermal method of depositing a bioceramic-based coating on polymeric substrates is by incubation in liquid, e.g., simulated body fluid to form an apatite-like layer. The drawbacks of this method include the long processing time, the production of low scratch resistant coating, and an end product that does not resemble the intended bioceramic composition. Techniques, such as plasma spraying and magnetron sputtering, involving high processing temperature are unsuitable for polymers, e.g., PMMA. Here, we introduce a nonthermal coating method to immobilize hydroxyapatite (HAp) and TiO2 nanoparticles on PMMA via a simple and fast dip coating method...
December 28, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27965170/atomic-scale-modeling-of-iron-doped-biphasic-calcium-phosphate-bioceramics
#13
Sandrine Gomes, Amandeep Kaur, Jean-Marc Grenèche, Jean-Marie Nedelec, Guillaume Renaudin
: Biphasic calcium phosphates (BCPs) are bioceramics composed of hydroxyapatite (HAp, Ca10(PO4)6(OH)2) and beta-Tricalcium Phosphate (β-TCP, Ca3(PO4)2). Because their chemical and mineral composition closely resembles that of the mineral component of bone, they are potentially interesting candidates for bone repair surgery, and doping can advantageously be used to improve their biological behavior. However, it is important to describe the doping mechanism of BCP thoroughly in order to be able to master its synthesis and then to fully appraise the benefit of the doping process...
December 10, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27939732/ion-release-microstructural-and-biological-properties-of-iroot-bp-plus-and-proroot-mta-exposed-to-an-acidic-environment
#14
Jun Tian, Yuanhe Zhang, Zhihui Lai, Mengjie Li, Yu Huang, Hongwei Jiang, Xi Wei
INTRODUCTION: This study evaluated how exposing the novel calcium silicate nanoparticulate bioceramic iRoot BP Plus (Innovative Bioceramix, Vancouver, Canada) to an acidic environment affects ion release from this material and alters MC3T3-E1 preosteoblast viability on and attachment to this material. These factors were compared against those of ProRoot MTA under similar conditions. METHODS: Each material was exposed to phosphate-buffered saline (pH = 7.4) or butyric acid (pH = 5...
January 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/27904662/influence-of-biological-scaffold-regulation-on-the-proliferation-of-chondrocytes-and-the-repair-of-articular-cartilage
#15
Si-Qun Wang, Jun Xia, Jie Chen, Jian-Xi Lu, Yi-Bing Wei, Fei-Yan Chen, Gang-Yong Huang, Jing-Sheng Shi, Yong-Lin Yu
PURPOSE: To investigate the effects of hard tissue engineering scaffold (the material is β-TCP) with different micro-structures on the proliferation of chondrocytes, and the influence of its composite erythrocytes on the repair of articular cartilage defects. METHODS: Rabbit cartilage cells were on β-TCP bioceramic scaffold with different micro-structures in vitro, the proliferation growth trend of chondrocytes within the scaffold was calculated, and a optimal micro-structure suitable for cartilage cell growth was determined...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27881916/osseointegration-of-nanohydroxyapatite-or-nano-calcium-silicate-incorporated-polyetheretherketone-bioactive-composites-in-vivo
#16
Rui Ma, Zhifeng Yu, Songchao Tang, Yongkang Pan, Jie Wei, Tingting Tang
Polyetheretherketone (PEEK) exhibits appropriate biomechanical strength as well as good biocompatibility and stable chemical properties but lacks bioactivity and cannot achieve highly efficient osseointegration after implantation. Incorporating bioceramics into the PEEK matrix is a feasible approach for improving its bioactivity. In this study, nanohydroxyapatite (n-HA) and nano-calcium silicate (n-CS) were separately incorporated into PEEK to prepare n-HA/PEEK and n-CS/PEEK biocomposites, respectively, using a compounding and injection-molding technique, and the in vitro degradation characteristics were evaluated...
2016: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/27870141/periodontal-tissue-engineering-by-nano-beta-tricalcium-phosphate-scaffold-and-fibroblast-growth-factor-2-in-one-wall-infrabony-defects-of-dogs
#17
K Ogawa, H Miyaji, A Kato, Y Kosen, T Momose, T Yoshida, E Nishida, S Miyata, S Murakami, H Takita, B Fugetsu, T Sugaya, M Kawanami
BACKGROUND AND OBJECTIVE: Nanoparticle bioceramics are being investigated for biomedical applications. We fabricated a regenerative scaffold comprising type I collagen and beta-tricalcium phosphate (β-TCP) nanoparticles. Fibroblast growth factor-2 (FGF-2) is a bioeffective signaling molecule that stimulates cell proliferation and wound healing. This study examined the effects, on bioactivity, of a nano-β-TCP/collagen scaffold loaded with FGF-2, particularly on periodontal tissue wound healing...
December 2016: Journal of Periodontal Research
https://www.readbyqxmd.com/read/27860335/development-of-a-synthetic-tissue-engineered-3d-printed-bioceramic-based-bone-graft-with-homogenously-distributed-osteoblasts-and-mineralizing-bone-matrix-in-vitro
#18
Doaa Adel-Khattab, Francesca Giacomini, Renate Gildenhaar, Georg Berger, Cynthia Gomes, Ulf Linow, Martin Hardt, Barbara Peleska, Jens Günster, Michael Stiller, Alireza Houshmand, Khaled Abdel Ghaffar, Ahmed Gamal, Mohamed El-Mofty, Christine Knabe
Over the last decade there have been increasing efforts to develop 3D scaffolds for bone tissue engineering from bioactive ceramics with 3D printing emerging as a promising technology. The overall objective of the present study was to generate a tissue engineered synthetic bone graft with homogenously distributed osteoblasts and mineralizing bone matrix in vitro, thereby mimicking the advantageous properties of autogenous bone grafts and facilitating usage for reconstructing segmental discontinuity defects in vivo...
November 15, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27857514/the-use-of-bioceramics-in-endodontics-literature-review
#19
REVIEW
Stefan Jitaru, Ioana Hodisan, Lucia Timis, Anamaria Lucian, Marius Bud
BACKGROUND AND AIM: Bioceramics are ceramic compounds obtained both in situ and in vivo, by various chemical processes. Bioceramics exhibit excellent biocompatibility due to their similarity with biological materials, like hydroxyapatite. Bioceramics and multi-substituted hydroxyapatite or similar compounds have the ability to induce a regenerative response in the organism. The aim of this paper is to make a literature review on the main bioceramic materials currently used in endodontics and on their specific characteristics...
2016: Clujul Medical (1957)
https://www.readbyqxmd.com/read/27845276/3d-scaffold-with-effective-multidrug-sequential-release-against-bacteria-biofilm
#20
Rafaela García-Alvarez, Isabel Izquierdo-Barba, María Vallet-Regí
: Bone infection is a feared complication following surgery or trauma that remains as an extremely difficult disease to deal with. So far, the outcome of therapy could be improved with the design of 3D implants, which combine the merits of osseous regeneration and local multidrug therapy so as to avoid bacterial growth, drug resistance and the feared side effects. Herein, hierarchical 3D multidrug scaffolds based on nanocomposite bioceramic and polyvinyl alcohol (PVA) prepared by rapid prototyping with an external coating of gelatin-glutaraldehyde (Gel-Glu) have been fabricated...
November 11, 2016: Acta Biomaterialia
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