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Jafari S, Soleimani M, Badinezhad M. Application of different mathematical models for further investigation of in vitro drug release mechanisms based on magnetic nano-composite. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-03537-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Szczepańczyk P, Szlachta M, Złocista-Szewczyk N, Chłopek J, Pielichowska K. Recent Developments in Polyurethane-Based Materials for Bone Tissue Engineering. Polymers (Basel) 2021; 13:polym13060946. [PMID: 33808689 PMCID: PMC8003502 DOI: 10.3390/polym13060946] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 02/24/2021] [Accepted: 02/25/2021] [Indexed: 11/16/2022] Open
Abstract
To meet the needs of clinical medicine, bone tissue engineering is developing dynamically. Scaffolds for bone healing might be used as solid, preformed scaffolding materials, or through the injection of a solidifiable precursor into the defective tissue. There are miscellaneous biomaterials used to stimulate bone repair including ceramics, metals, naturally derived polymers, synthetic polymers, and other biocompatible substances. Combining ceramics and metals or polymers holds promise for future cures as the materials complement each other. Further research must explain the limitations of the size of the defects of each scaffold, and additionally, check the possibility of regeneration after implantation and resistance to disease. Before tissue engineering, a lot of bone defects were treated with autogenous bone grafts. Biodegradable polymers are widely applied as porous scaffolds in bone tissue engineering. The most valuable features of biodegradable polyurethanes are good biocompatibility, bioactivity, bioconductivity, and injectability. They may also be used as temporary extracellular matrix (ECM) in bone tissue healing and regeneration. Herein, the current state concerning polyurethanes in bone tissue engineering are discussed and introduced, as well as future trends.
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Preparation and characterization of diatomite and hydroxyapatite reinforced porous polyurethane foam biocomposites. Sci Rep 2020; 10:13308. [PMID: 32764640 PMCID: PMC7413266 DOI: 10.1038/s41598-020-70421-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 07/30/2020] [Indexed: 11/09/2022] Open
Abstract
Porous three-dimensional (3D) polyurethane-based biocomposites were produced utilizing diatomite and hydroxyapatite as fillers. Diatomite and Hydroxyapatite (HA) were utilized to reinforce the morphological, chemical, mechanical, and thermal properties of polyurethane foam (PUF). Diatomite and Hydroxyapatite were added into polyurethane at variable percentages 0, 1, 2, and 5. The mechanical properties of PUF were analyzed by the compression test. According to the compression test results, the compressive strength of the polyurethane foam is highest in the reinforced foam at 1% by weight hydroxyapatite compared to other reinforced PUFs. Scanning electron microscopy (SEM) images presented structural differences on foam by adding fillers. Functional groups of PUF were defined by Fourier Transform Infrared Spectroscopy (FTIR) and the thermal behavior of PUF was studied with Thermogravimetric Analysis (TGA). The obtained results revealed that PUF/HA biocomposites indicated higher thermal degradation than PUF/Diatomite biocomposites.
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Zamani D, Moztarzadeh F, Bizari D. Alginate-bioactive glass containing Zn and Mg composite scaffolds for bone tissue engineering. Int J Biol Macromol 2019; 137:1256-1267. [DOI: 10.1016/j.ijbiomac.2019.06.182] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Revised: 06/16/2019] [Accepted: 06/24/2019] [Indexed: 12/22/2022]
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Meskinfam M, Bertoldi S, Albanese N, Cerri A, Tanzi M, Imani R, Baheiraei N, Farokhi M, Farè S. Polyurethane foam/nano hydroxyapatite composite as a suitable scaffold for bone tissue regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 82:130-140. [DOI: 10.1016/j.msec.2017.08.064] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 08/13/2017] [Accepted: 08/16/2017] [Indexed: 01/10/2023]
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Marzec M, Kucińska-Lipka J, Kalaszczyńska I, Janik H. Development of polyurethanes for bone repair. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 80:736-747. [PMID: 28866223 DOI: 10.1016/j.msec.2017.07.047] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 01/23/2017] [Accepted: 07/29/2017] [Indexed: 12/12/2022]
Abstract
The purpose of this paper is to review recent developments on polyurethanes aimed at the design, synthesis, modifications, and biological properties in the field of bone tissue engineering. Different polyurethane systems are presented and discussed in terms of biodegradation, biocompatibility and bioactivity. A comprehensive discussion is provided of the influence of hard to soft segments ratio, catalysts, stiffness and hydrophilicity of polyurethanes. Interaction with various cells, behavior in vivo and current strategies in enhancing bioactivity of polyurethanes are described. The discussion on the incorporation of biomolecules and growth factors, surface modifications, and obtaining polyurethane-ceramics composites strategies is held. The main emphasis is placed on the progress of polyurethane applications in bone regeneration, including bone void fillers, shape memory scaffolds, and drug carrier.
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Affiliation(s)
- M Marzec
- Department of Polymer Technology, Faculty of Chemistry, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland
| | - J Kucińska-Lipka
- Department of Polymer Technology, Faculty of Chemistry, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland.
| | - I Kalaszczyńska
- Department of Histology and Embryology, Center for Biostructure Research, Medical University of Warsaw, Chalubinskiego 5, 02-004 Warsaw, Poland; Centre for Preclinical Research and Technology, Banacha 1b, 02-097 Warsaw, Poland
| | - H Janik
- Department of Polymer Technology, Faculty of Chemistry, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland
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Bozkurt Y, Sahin A, Sunulu A, Aydogdu MO, Altun E, Oktar FN, Ekren N, Gunduz O. Electrospun Nanocomposite Materials, A Novel Synergy of Polyurethane and Bovine Derived Hydroxyapatite. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/1742-6596/829/1/012015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Hafezi M, Safarian S, Khorasani MT, Abu Osman NA. Polyurethane/58S bioglass nanofibers: synthesis, characterization, and in vitro evaluation. RSC Adv 2016. [DOI: 10.1039/c5ra24786a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this study, polyurethane nanofibers containing 5 and 10 wt% synthesized 58S bioglass were designed and fabricated by the electrospinning process.
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Affiliation(s)
- Masoud Hafezi
- Department of Biomedical Engineering
- Faculty of Engineering
- University of Malaya
- Kuala Lumpur
- Malaysia
| | - Shokofeh Safarian
- Department of Biomaterials
- Tehran Science and Research Branch
- Islamic Azad University
- Tehran
- Iran
| | | | - Noor Azuan Abu Osman
- Department of Biomedical Engineering
- Faculty of Engineering
- University of Malaya
- Kuala Lumpur
- Malaysia
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9
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Bioactive glass reinforced elastomer composites for skeletal regeneration: A review. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 53:175-88. [DOI: 10.1016/j.msec.2015.04.035] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Revised: 04/02/2015] [Accepted: 04/21/2015] [Indexed: 01/21/2023]
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Harmata AJ, Ward CL, Zienkiewicz KJ, Wenke JC, Guelcher SA. Investigating the Effects of Surface-Initiated Polymerization of ε-Caprolactone to Bioactive Glass Particles on the Mechanical Properties of Settable Polymer/Ceramic Composites. JOURNAL OF MATERIALS RESEARCH 2014; 29:2398-2407. [PMID: 25798027 PMCID: PMC4364443 DOI: 10.1557/jmr.2014.254] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Injectable bone grafts with strength exceeding that of trabecular bone could improve the management of a number of orthopaedic conditions. Ceramic/polymer composites have been investigated as weight-bearing bone grafts, but they are typically weaker than trabecular bone due to poor interfacial bonding. We hypothesized that entrapment of surface-initiated poly(ε-caprolactone) (PCL) chains on 45S5 bioactive glass (BG) particles within an in situ-formed polymer network would enhance the mechanical properties of reactive BG/polymer composites. When the surface-initiated PCL molecular weight exceeded the molecular weight between crosslinks of the network, the compressive strength of the composites increased 6- to 10-fold. The torsional strength of the composites exceeded that of human trabecular bone by a factor of two. When injected into femoral condyle defects in rats, the composites supported new bone formation at 8 weeks. The initial bone-like strength of BG/polymer composites and their ability to remodel in vivo highlight their potential for development as injectable grafts for repair of weight-bearing bone defects.
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Affiliation(s)
- Andrew J Harmata
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 37235 ; Center for Bone Biology, Vanderbilt Medical Center, Nashville, TN 37232
| | - Catherine L Ward
- Orthopaedic Task Area, U.S. Army Institute of Surgical Research, San Antonio, TX 78234
| | - Katarzyna J Zienkiewicz
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 37235
| | - Joseph C Wenke
- Orthopaedic Task Area, U.S. Army Institute of Surgical Research, San Antonio, TX 78234
| | - Scott A Guelcher
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 37235 ; Center for Bone Biology, Vanderbilt Medical Center, Nashville, TN 37232 ; Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235
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Abstract
AbstractIn the present work Polyurethane (PU)/Bioglass (BG) composite materials were synthesized with different content of BG (10 and 20 mol.%) as filler. The 85S Bioglass was synthesized via polystep sol-gel method. The chemical composition of BG is 85SiO2-10CaO-5P2O5 (wt.%). The synthesis of PU was carried out by a two-step polyaddition reaction. The 85S BG was added in situ during the polymerization reaction. In vitro bioactivity of the prepared composites was examined in the presence of 1.5 SBF for 7 days in static conditions. The structure of synthesized PU/BG composites before and after in vitro test was determined by XRD, FTIR and SEM. XRD of the samples before in vitro test proved that the phase of γCa2P2O7 in the PU/20BG is visible. FTIR revealed the presence of urethane bond between OH-(from BG) and NCO groups (from PU). Based on FTIR results after in vitro test in 1.5 SBF solutions, A/B-carbonate containing hydroxyapatite (CO3HA) was formed. XRD proved that HA was formed on the surface of the samples, but Ca2P2O7 does not undergo any changes in the 1.5 SBF solution. SEM depicted the nano-HA agglomerated in spherical particles after immersion in 1.5 SBF for 7 days.
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Cherng JY, Hou TY, Shih MF, Talsma H, Hennink WE. Polyurethane-based drug delivery systems. Int J Pharm 2013; 450:145-62. [DOI: 10.1016/j.ijpharm.2013.04.063] [Citation(s) in RCA: 196] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Revised: 04/19/2013] [Accepted: 04/20/2013] [Indexed: 01/21/2023]
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El-Gendy R, Yang XB, Newby PJ, Boccaccini AR, Kirkham J. Osteogenic differentiation of human dental pulp stromal cells on 45S5 Bioglass® based scaffolds in vitro and in vivo. Tissue Eng Part A 2012; 19:707-15. [PMID: 23046092 DOI: 10.1089/ten.tea.2012.0112] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The increasing clinical demand for bone substitutes has driven significant progress in cell-based therapies for bone tissue engineering. The underpinning goals for success are to identify the most appropriate cell source and to provide three-dimensional (3D) scaffolds that support cell growth and enhance osteogenic potential. In this study, human dental pulp stromal cells (HDPSCs) were cultured under basal or osteogenic conditions either in monolayers or on 3D Bioglass® scaffolds in vitro for 2 or 4 weeks. Cell-scaffold constructs were also implanted intraperitoneally in nude mice for 8 weeks. Osteogenic potential was assessed using quantitative real-time polymerase chain reaction and histological/immunohistochemical assays. In monolayer culture, osteoinductive conditions enhanced HDPSC expression of osteogenic gene markers (COL1A1, RUNX2, OC, and/or OCN) compared with basal conditions while culture of HDPSCs on 3D scaffolds promoted osteogenic gene expression compared with monolayer culture under both basal and osteogenic conditions. These results were confirmed using histological and immunohistochemical analyses. In vivo implantation of the HDPSC 3D Bioglass constructs showed evidence of sporadic woven bone-like spicules and calcified tissue. In conclusion, this study has demonstrated the potential of using a combination of HDPSCs with 3D 45S5 Bioglass scaffolds to promote bone-like tissue formation in vitro and in vivo, offering a promising approach for clinical bone repair and regeneration.
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Affiliation(s)
- Reem El-Gendy
- Biomaterials and Tissue Engineering Group, Leeds Dental Institute, University of Leeds, Leeds, United Kingdom
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Li Y, Wang Y, Wang P, Zhang B, Yan W, Sun J, Pan J. In vitrocytocompatibility evaluation of MGF-Ct24E chemically grafted and physically blended with maleic anhydride modified poly(D, L-lactic acid). JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 24:849-64. [DOI: 10.1080/09205063.2012.723957] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Yuxiao Li
- a Research Center of Bioinspired Material Science and Engineering, College of Bioengineering, Chongqing University , Chongqing , China
| | - Yuanliang Wang
- a Research Center of Bioinspired Material Science and Engineering, College of Bioengineering, Chongqing University , Chongqing , China
| | - Pinpin Wang
- a Research Center of Bioinspired Material Science and Engineering, College of Bioengineering, Chongqing University , Chongqing , China
| | - Bingbing Zhang
- a Research Center of Bioinspired Material Science and Engineering, College of Bioengineering, Chongqing University , Chongqing , China
| | - Weiwei Yan
- a Research Center of Bioinspired Material Science and Engineering, College of Bioengineering, Chongqing University , Chongqing , China
| | - Jiaoxia Sun
- a Research Center of Bioinspired Material Science and Engineering, College of Bioengineering, Chongqing University , Chongqing , China
| | - Jun Pan
- a Research Center of Bioinspired Material Science and Engineering, College of Bioengineering, Chongqing University , Chongqing , China
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Asefnejad A, Behnamghader A, Khorasani MT, Farsadzadeh B. Polyurethane/fluor-hydroxyapatite nanocomposite scaffolds for bone tissue engineering. Part I: morphological, physical, and mechanical characterization. Int J Nanomedicine 2011; 6:93-100. [PMID: 21289986 PMCID: PMC3025589 DOI: 10.2147/ijn.s13385] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
In this study, new nano-fluor-hydroxyapatite (nFHA)/polyurethane composite scaffolds were fabricated for potential use in bone tissue engineering. Polyester urethane samples were synthesized from polycaprolactone, hexamethylene diisocyanate, and 1,4-butanediol as chain extender. Nano fluor-hydroxyapatite (nFHA) was successfully synthesized by sol-gel method. The solid–liquid phase separation and solvent sublimation methods were used for preparation of the porous composites. Mechanical properties, chemical structure, and morphological characteristics of the samples were investigated by compressive test, Fourier transform infrared, and scanning electron microscopy (SEM) techniques, respectively. The effect of nFHA powder content on porosity and pore morphology was investigated. SEM images demonstrated that the scaffolds were constituted of interconnected and homogeneously distributed pores. The pore size of the scaffolds was in the range 50–250 μm. The result obtained in this research revealed that the porosity and pore average size decreased and compressive modulus increased with nFHA percentage. Considering morphological, physical, and mechanical properties, the scaffold with a higher ratio of nFHA has suitable potential use in tissue regeneration.
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Affiliation(s)
- Azadeh Asefnejad
- Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
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Effects of chitosan-coated pressed calcium sulfate pellets combined with recombinant human bone morphogenetic protein 2 on bone formation in femoral condyle-contained bone defects. J Craniofac Surg 2010; 21:188-97. [PMID: 20098183 DOI: 10.1097/scs.0b013e3181c50f8f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Calcium sulfate has a rapid degradation rate and little osteoinductive capability. Chitosan-coated pressed calcium sulfate pellets combined with recombinant human bone morphogenetic protein 2 (rhBMP-2) have been developed that exhibit decreased resorption speed and increased compressive strength and osteoinduction. A rabbit femoral condyle-contained bone defect model was used to study the restoration of the defects treated with chitosan-coated pressed calcium sulfate pellets combined with rhBMP-2, chitosan-coated pressed calcium sulfate pellets, and uncoated pressed calcium sulfate pellets. No pellets were implanted in the control group. After 3 and 13 weeks, the results indicated that chitosan-coated pressed calcium sulfate pellets exhibited relatively slower resorption that closely coincides with the growth rate of new bone and enhanced osteogenesis when combined with rhBMP-2.
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Ho WF, Lai CH, Hsu HC, Wu SC. Surface modification of a Ti-7.5Mo alloy using NaOH treatment and Bioglass coating. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2010; 21:1479-1488. [PMID: 20069344 DOI: 10.1007/s10856-010-3990-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2009] [Accepted: 01/04/2010] [Indexed: 05/28/2023]
Abstract
The objective of this study was to propose a surface modification for a low-modulus Ti-7.5Mo alloy to initiate the formation of hydroxyapatite (HA) during in vitro bioactivity tests in simulated body fluid (SBF). Specimens of commercially pure titanium (c.p. Ti) and Ti-7.5Mo were initially immersed in a 15 M NaOH solution at 60 degrees C for 24 h, resulting in the formation of a porous network structure composed of sodium titanate (Na(2)Ti(5)O(11)). Afterwards, bioactive Bioglass particles were deposited on the surface of NaOH-treated c.p. Ti and Ti-7.5Mo. The specimens were then immersed in SBF at 37 degrees C for 1, 7 and 28 days, respectively. The apatite-forming ability of the NaOH-treated and Bioglass-coated Ti-7.5Mo was higher than that of the c.p. Ti under the same condition. The X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDS) results indicated that the deposited amounts of calcium phosphate were much greater for the surface-treated Ti-7.5Mo than for the c.p. Ti, a finding attributable to or correlated with the higher pH value of the SBF containing surface-treated Ti-7.5Mo. Moreover, in the surface-treated Ti-7.5Mo, the pH value of the SBF approached a peak of 7.66 on the first day. A combination of NaOH treatment and subsequent Bioglass coating was successfully used to initiate in vitro HA formation in the surface of the Ti-7.5Mo alloy.
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Affiliation(s)
- Wen-Fu Ho
- Department of Materials Science and Engineering, Da-Yeh University, 168 University Road, Dacun, Changhua, 51591, Taiwan, ROC.
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Baino F, Verné E, Vitale-Brovarone C. Feasibility, tailoring and properties of polyurethane/bioactive glass composite scaffolds for tissue engineering. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2009; 20:2189-2195. [PMID: 19488679 DOI: 10.1007/s10856-009-3787-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2009] [Accepted: 05/19/2009] [Indexed: 05/27/2023]
Abstract
This research work aims to propose highly porous polymer/bioactive glass composites as potential scaffolds for hard-tissue and soft-tissue engineering. The scaffolds were prepared by impregnating an open-cells polyurethane sponge with melt-derived particles of a bioactive glass belonging to the SiO(2)-P(2)O(5)-CaO-MgO-Na(2)O-K(2)O system (CEL2). Both the starting materials and the composite scaffolds were investigated from a morphological and structural viewpoint by X-ray diffraction analysis and scanning electron microscopy. Tensile mechanical tests, carried out according to international ISO and ASTM standards, were performed by using properly tailored specimens. In vitro tests by soaking the scaffolds in simulated body fluid (SBF) were also carried out to assess the bioactivity of the porous composites. It was found that the composite scaffolds were highly bioactive as after 7 days of soaking in SBF a HA layer grew on their surface. The obtained polyurethane/CEL2 composite scaffolds are promising candidates for tissue engineering applications.
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Affiliation(s)
- Francesco Baino
- Materials Science and Chemical Engineering Department, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy.
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Hyde GK, McCullen SD, Jeon S, Stewart SM, Jeon H, Loboa EG, Parsons GN. Atomic layer deposition and biocompatibility of titanium nitride nano-coatings on cellulose fiber substrates. Biomed Mater 2009; 4:025001. [PMID: 19208941 DOI: 10.1088/1748-6041/4/2/025001] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Atomic layer deposition (ALD) is investigated as a process to produce inorganic metallic bio-adhesive coatings on cellulosic fiber substrates. The atomic layer deposition technique is known to be capable of forming highly conformal and uniform inorganic thin film coatings on a variety of complex surfaces, and this work presents an initial investigation of ALD on porous substrate materials to produce high-precision biocompatible titanium oxynitride coatings. X-ray photoelectron spectroscopy (XPS) confirmed TiNOx composition, and transmission electron microscopy (TEM) analysis showed the coatings to be uniform and conformal on the fiber surfaces. Biocompatibility of the modified structures was determined as a function of coating layer thickness by fluorescent live/dead staining of human adipose-derived adult stem cells (hADSC) at 6, 12 and 24 h. Cell adhesion showed that thin TiNOx coatings yielded the highest number of cells after 24 h with a sample coated with a 20 A coating having approximately 28.4 +/- 3.50 ng DNA. By altering the thickness of the deposited film, it was possible to control the amount of cells adhered to the samples. This work demonstrates the potential of low temperature ALD as a surface modification technique to produce biocompatible cellulose and other implant materials.
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Affiliation(s)
- G K Hyde
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA
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Zawadzak E, Bil M, Ryszkowska J, Nazhat SN, Cho J, Bretcanu O, Roether JA, Boccaccini AR. Polyurethane foams electrophoretically coated with carbon nanotubes for tissue engineering scaffolds. Biomed Mater 2008; 4:015008. [DOI: 10.1088/1748-6041/4/1/015008] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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