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Raihan MM, Otsuka Y, Tsuchida K, Manonukul A, Ohnuma K, Miyashita Y. Damage evaluation of HAp-coated porous titanium foam in simulated body fluid based on compression fatigue behavior. J Mech Behav Biomed Mater 2021; 117:104383. [PMID: 33596530 DOI: 10.1016/j.jmbbm.2021.104383] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 02/02/2021] [Accepted: 02/04/2021] [Indexed: 01/13/2023]
Abstract
Although pure Ti is nontoxic, alloying elements may be released into the surrounding tissue when Ti alloys are used, and this can cause cytotoxicity. Therefore, this study performed the damage evaluation of hydroxyapatite (HAp)-coated porous Ti components subjected to cyclic compression in a simulated body fluid (SBF). The HAp coating layer was deposited on the surface of porous Ti by electrophoresis, and a dense and homogeneous coating morphology was observed on the surface of the porous Ti. To specify damage types of HAp coating in situ, acoustic emission (AE) measurements and microscopic observations were simultaneously conducted during compressive fatigue loading tests to detect the specific failure mode. Compression tests revealed that the interfacial strength between the HAp coating and porous Ti was higher than the yield strength of the porous body (7-9 MPa). The AE signals were detected only in the plastic deformation stage of porous Ti, which indicated that they were generated because of plastic deformation/fractures in the porous body. Compressive fatigue tests revealed that no significant HAp coating damage occurred when the applied maximum stress was within the elastic limit of porous Ti in air. In contrast, the HAp coating exhibited delamination at the initial stage of cyclic loading at all stress levels in SBF, while the fatigue limit of the coated porous substrate, 2 MPa, was not affected by the SBF medium. Though the delamination of the HAp coating in SBF occurred during the early stages of fatigue loading, the amorphous calcium phosphate layer was recovered partly through re-precipitation from SBF. The AE signals from the delamination of the HAp coating or fracture in porous Ti could be identified using the peak voltage and frequencies. As microscopic observations were limited to certain parts of the porous body, AE signals were clustered according to the types of failure. The clustered AE signals were successfully correlated with the fatigue behavior of porous Ti. Corrosion fatigue was determined to be the primary mechanism for the delamination of the HAp coating on porous Ti in SBF.
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Affiliation(s)
- Munshi Mohammad Raihan
- Graduate School of Information and Control Science, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka-shi, Niigata, 940-2188, Japan
| | - Yuichi Otsuka
- Department of System Safety, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka-shi, Niigata, 940-2188, Japan.
| | - Koudai Tsuchida
- Department of Mechanical Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka-shi, Niigata, 940-2188, Japan
| | - Anchalee Manonukul
- National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency (NSTDA), 114 Thailand Science Park, Paholyothin Road, Klong 1, Klong Luang, Pathumthani, Thailand
| | - Kiyoshi Ohnuma
- Department of Bio-engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka-shi, Niigata, 940-2188, Japan
| | - Yukio Miyashita
- Department of Mechanical Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka-shi, Niigata, 940-2188, Japan
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2
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Tite T, Popa AC, Balescu LM, Bogdan IM, Pasuk I, Ferreira JMF, Stan GE. Cationic Substitutions in Hydroxyapatite: Current Status of the Derived Biofunctional Effects and Their In Vitro Interrogation Methods. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E2081. [PMID: 30355975 PMCID: PMC6266948 DOI: 10.3390/ma11112081] [Citation(s) in RCA: 111] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 10/13/2018] [Accepted: 10/19/2018] [Indexed: 12/13/2022]
Abstract
High-performance bioceramics are required for preventing failure and prolonging the life-time of bone grafting scaffolds and osseous implants. The proper identification and development of materials with extended functionalities addressing socio-economic needs and health problems constitute important and critical steps at the heart of clinical research. Recent findings in the realm of ion-substituted hydroxyapatite (HA) could pave the road towards significant developments in biomedicine, with an emphasis on a new generation of orthopaedic and dentistry applications, since such bioceramics are able to mimic the structural, compositional and mechanical properties of the bone mineral phase. In fact, the fascinating ability of the HA crystalline lattice to allow for the substitution of calcium ions with a plethora of cationic species has been widely explored in the recent period, with consequent modifications of its physical and chemical features, as well as its functional mechanical and in vitro and in vivo biological performance. A comprehensive inventory of the progresses achieved so far is both opportune and of paramount importance, in order to not only gather and summarize information, but to also allow fellow researchers to compare with ease and filter the best solutions for the cation substitution of HA-based materials and enable the development of multi-functional biomedical designs. The review surveys preparation and synthesis methods, pinpoints all the explored cation dopants, and discloses the full application range of substituted HA. Special attention is dedicated to the antimicrobial efficiency spectrum and cytotoxic trade-off concentration values for various cell lines, highlighting new prophylactic routes for the prevention of implant failure. Importantly, the current in vitro biological tests (widely employed to unveil the biological performance of HA-based materials), and their ability to mimic the in vivo biological interactions, are also critically assessed. Future perspectives are discussed, and a series of recommendations are underlined.
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Affiliation(s)
- Teddy Tite
- National Institute of Materials Physics, RO-077125 Magurele, Romania.
| | - Adrian-Claudiu Popa
- National Institute of Materials Physics, RO-077125 Magurele, Romania.
- Army Centre for Medical Research, RO-010195 Bucharest, Romania.
| | | | | | - Iuliana Pasuk
- National Institute of Materials Physics, RO-077125 Magurele, Romania.
| | - José M F Ferreira
- Department of Materials and Ceramics Engineering, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - George E Stan
- National Institute of Materials Physics, RO-077125 Magurele, Romania.
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Staniszewski Z, Piegat A, Okroj W, Walkowiak-Przybylo M, Jakubowski W, Walkowiak B, Budner B, Mroz W, Sobolewski P, El Fray M. The effect of carbon nanoparticles on biological properties of polyester nanocomposites. J Biomater Appl 2017; 31:1328-1336. [PMID: 28517978 DOI: 10.1177/0885328217706193] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The aim of present study was to determine the hemocompatibility, cellular response of endothelial cells and bacterial adhesion to a new polyester nanocomposite. The carbon nanoparticle nanocomposite was prepared via in situ polymerization of monomers to obtain material of hardness 55 Sh D similar to polyurethanes used in medical applications, for example, in heart-assisting devices. The carbon nanoparticle-containing polyester exhibits markedly reduced bacterial colonization, as compared to commercially available polyurethanes. Further the nanocomposite possesses markedly improved hemocompatibility, as determined by flow cytometry, and robust endothelialization. Possible explanations for these beneficial properties include surface nanoroughness of carbon nanoparticle-containing nanocomposites and presence of fatty acid sequences within polymer structure.
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Affiliation(s)
- Zygmunt Staniszewski
- 1 Polymer Institute, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology, Poland
| | - Agnieszka Piegat
- 1 Polymer Institute, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology, Poland
| | - Wieslawa Okroj
- 2 Institute of Materials Engineering, Lodz University of Technology, Poland
| | | | - Witold Jakubowski
- 2 Institute of Materials Engineering, Lodz University of Technology, Poland
| | - Bogdan Walkowiak
- 2 Institute of Materials Engineering, Lodz University of Technology, Poland
| | - Boguslaw Budner
- 3 Institute of Optoelectronics, Military University of Technology, Warsaw, Poland
| | - Waldemar Mroz
- 3 Institute of Optoelectronics, Military University of Technology, Warsaw, Poland
| | - Peter Sobolewski
- 1 Polymer Institute, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology, Poland
| | - Miroslawa El Fray
- 1 Polymer Institute, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology, Poland
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Popa AC, Stan GE, Husanu MA, Mercioniu I, Santos LF, Fernandes HR, Ferreira JMF. Bioglass implant-coating interactions in synthetic physiological fluids with varying degrees of biomimicry. Int J Nanomedicine 2017; 12:683-707. [PMID: 28176941 PMCID: PMC5268334 DOI: 10.2147/ijn.s123236] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Synthetic physiological fluids are currently used as a first in vitro bioactivity assessment for bone grafts. Our understanding about the interactions taking place at the fluid-implant interface has evolved remarkably during the last decade, and does not comply with the traditional International Organization for Standardization/final draft International Standard 23317 protocol in purely inorganic simulated body fluid. The advances in our knowledge point to the need of a true paradigm shift toward testing physiological fluids with enhanced biomimicry and a better understanding of the materials' structure-dissolution behavior. This will contribute to "upgrade" our vision of entire cascades of events taking place at the implant surfaces upon immersion in the testing media or after implantation. Starting from an osteoinductive bioglass composition with the ability to alleviate the oxidative stress, thin bioglass films with different degrees of polymerization were deposited onto titanium substrates. Their biomineralization activity in simulated body fluid and in a series of new inorganic-organic media with increasing biomimicry that more closely simulated the human intercellular environment was compared. A comprehensive range of advanced characterization tools (scanning electron microscopy; grazing-incidence X-ray diffraction; Fourier-transform infrared, micro-Raman, energy-dispersive, X-ray photoelectron, and surface-enhanced laser desorption/ionization time-of-flight mass spectroscopies; and cytocompatibility assays using mesenchymal stem cells) were used. The information gathered is very useful to biologists, biophysicists, clinicians, and material scientists with special interest in teaching and research. By combining all the analyses, we propose herein a step forward toward establishing an improved unified protocol for testing the bioactivity of implant materials.
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Affiliation(s)
- AC Popa
- National Institute of Materials Physics, Măgurele
- Army Centre for Medical Research, Bucharest, Romania
| | - GE Stan
- National Institute of Materials Physics, Măgurele
| | - MA Husanu
- National Institute of Materials Physics, Măgurele
| | - I Mercioniu
- National Institute of Materials Physics, Măgurele
| | - LF Santos
- Centro de Química Estrutural, Instituto Superior Técnico (CQE-IST), University of Lisbon, Lisbon
| | - HR Fernandes
- Department of Materials and Ceramics Engineering, Centre for Research in Ceramics and Composite Materials (CICECO), University of Aveiro, Aveiro, Portugal
| | - JMF Ferreira
- Department of Materials and Ceramics Engineering, Centre for Research in Ceramics and Composite Materials (CICECO), University of Aveiro, Aveiro, Portugal
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Skrobot J, Zair L, Ostrowski M, El Fray M. New injectable elastomeric biomaterials for hernia repair and their biocompatibility. Biomaterials 2016; 75:182-192. [DOI: 10.1016/j.biomaterials.2015.10.037] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Revised: 10/11/2015] [Accepted: 10/14/2015] [Indexed: 12/22/2022]
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El Fray M, Strzalkowska D, Mandoli C, Pagliari F, Di Nardo P, Traversa E. Influence of ceria nanoparticles on chemical structure and properties of segmented polyesters. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 53:15-22. [PMID: 26042685 DOI: 10.1016/j.msec.2015.04.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2015] [Revised: 03/14/2015] [Accepted: 04/10/2015] [Indexed: 10/23/2022]
Abstract
In this work, we present new nanocomposite materials derived from segmented copolyesters, comprising ethylene terephthalate (PET) segments and dimerized linoleic acid (DLA), and nanometric cerium oxide particles (CeO2). Nanoparticles were incorporated in situ during polycondensation in various concentrations, from 0.1 up to 0.6 wt.%. It was found that preparation of nanocomposites in situ, during polycondensation, had no significant influence on changes in segmental composition as determined from (1)H and (13)C, as well as 2D NMR. Thermal analysis and calculated degree of crystallinity showed that increasing concentration of ceria nanoparticles lead to an increase in mass content of PET crystallites in hard segments. The XRD investigations also showed an increased intensity of characteristic signals with increasing ceria concentration. Simultaneously, the incorporation of CeO2 led to an increase in tensile strength and elongation at break, indicating a reinforcing and plasticizing effect of ceria nanoparticles. However, the modulus at 10% strain decreased with increasing amount of nanoparticles. The in vitro culture of human cardiac progenitor cells (hCPCs) on the new materials indicated a homogenous cell displacement across the samples after 5 days with no signs of cytotoxicity, indicating good biocompatibility in vitro of CeO2-based nanocomposites and a potential for biomedical applications.
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Affiliation(s)
- M El Fray
- West Pomeranian University of Technology, Szczecin, Polymer Institute, Division of Biomaterials and Microbiological Technologies, Al. Piastów 45, 70-311 Szczecin, Poland.
| | - D Strzalkowska
- West Pomeranian University of Technology, Szczecin, Polymer Institute, Division of Biomaterials and Microbiological Technologies, Al. Piastów 45, 70-311 Szczecin, Poland
| | - C Mandoli
- International Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - F Pagliari
- Laboratory of Molecular and Cellular Cardiology, Department of Internal Medicine, University of Rome "Tor Vergata", Rome 00133, Italy
| | - P Di Nardo
- Laboratory of Molecular and Cellular Cardiology, Department of Internal Medicine, University of Rome "Tor Vergata", Rome 00133, Italy
| | - E Traversa
- International Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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Huang W, Wan Y, Chen J, Xu Q, Li X, Yang X, Li Y, Tu Y. One pot synthesis and characterization of novel poly(ether ester) mutiblock copolymers containing poly(tetramethylene oxide) and poly(ethylene terephthalate). Polym Chem 2014. [DOI: 10.1039/c3py00932g] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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8
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Papageorgiou GZ, Tsanaktsis V, Bikiaris DN. Crystallization of poly(butylene-2,6-naphthalate-co-butylene adipate) copolymers: regulating crystal modification of the polymorphic parent homopolymers and biodegradation. CrystEngComm 2014. [DOI: 10.1039/c4ce00651h] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Random PBNAd copolymers were synthesized. They showed isodimorphic cocrystallization. β PBN crystals were formed in copolymers with high BN content.
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Affiliation(s)
- George Z. Papageorgiou
- Laboratory of Polymer Chemistry and Technology
- Department of Chemistry
- Aristotle University of Thessaloniki
- Thessaloniki, Greece
| | - Vasilios Tsanaktsis
- Laboratory of Polymer Chemistry and Technology
- Department of Chemistry
- Aristotle University of Thessaloniki
- Thessaloniki, Greece
| | - Dimitrios N. Bikiaris
- Laboratory of Polymer Chemistry and Technology
- Department of Chemistry
- Aristotle University of Thessaloniki
- Thessaloniki, Greece
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9
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Su J, Chen Y, Tan L. Preparation and Hydrolytic Degradation of Poly(hexylene Terephthalate-co-Lactide) co-Polyesters From Melting Polycondensation. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 20:99-114. [DOI: 10.1163/156856208x393527] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Jiying Su
- a Institute of Polymer Materials, School of Materials Science and Engineering, Nanchang University, Xuefu Road 999, Nanchang 330031, P. R. China
| | - Yiwang Chen
- b Institute of Polymer Materials, School of Materials Science and Engineering, Nanchang University, Xuefu Road 999, Nanchang 330031, P. R. China; Department of Chemistry, School of Science, Nanchang University, Xuefu Road 999, Nanchang 330031, P. R. China
| | - Licheng Tan
- c Department of Chemistry, School of Science, Nanchang University, Xuefu Road 999, Nanchang 330031, P. R. China
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10
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Younes B, Fotheringham A. Factorial optimization of the effects of melt-spinning conditions on biodegradable as-spun aliphatic-aromatic copolyester fibers. III. Diameter, tensile properties, and thermal shrinkage. J Appl Polym Sci 2011. [DOI: 10.1002/app.34216] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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11
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Younes B, Fotheringham A, EL-Dessouky HM, Haddad G. Factorial Optimization of the Effects of Melt-Spinning Conditions on As-spun Aliphatic-Aromatic Copolyester Fibers I. Spin Draw Ratio, Overall Orientation and Drawability. INT J POLYM MATER PO 2011. [DOI: 10.1080/00914037.2010.531804] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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12
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Younes B, Fotheringham A. Factorial optimization of the effects of extrusion temperature profile and polymer grade on as-spun aliphatic-aromatic copolyester fibers. II. Crystallographic order. J Appl Polym Sci 2010. [DOI: 10.1002/app.32906] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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13
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Physical effects of radiation processes in poly(aliphatic/aromatic-ester)s modified with e-beam radiation. POLYMER 2010. [DOI: 10.1016/j.polymer.2010.01.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Götz C, Handge U, Piatek M, El Fray M, Altstädt V. Influence of e-beam irradiation on the dynamic creep and fatigue properties of poly(aliphatic/aromatic-ester) copolymers for biomedical applications. POLYMER 2009. [DOI: 10.1016/j.polymer.2009.09.051] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Puskas JE, El Fray M, Tomkins M, Dos Santos LM, Fischer F, Altstädt V. Dynamic stress relaxation of thermoplastic elastomeric biomaterials. POLYMER 2009. [DOI: 10.1016/j.polymer.2008.10.030] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Puskas JE, Dos Santos LM, Fischer F, Götz C, El Fray M, Altstädt V, Tomkins M. Fatigue testing of implantable specimens: Effect of sample size and branching on the dynamic fatigue properties of polyisobutylene-based biomaterials. POLYMER 2009. [DOI: 10.1016/j.polymer.2008.10.061] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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17
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Monvisade P, Loungvanidprapa P. Synthesis of poly(ethylene terephthalate-co-isophthalate) via ring-opening polymerization of their cyclic oligomers. JOURNAL OF POLYMER RESEARCH 2008. [DOI: 10.1007/s10965-008-9182-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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18
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Xiang Jun Zhu, Yiwang Chen, Jiying Suxiaohui He, Licheng Tan, Yang Wang. Synthesis of Aliphatic-Aromatic Copolyesters by a Melting Bulk Reaction Between Poly(butylene terephthalate) and DL-Oligo(lactic acid). HIGH PERFORM POLYM 2007. [DOI: 10.1177/0954008307080267] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
DL-Oligo(lactic acid) (OLA) readily reacts with poly(1,4-butylene terephthalate) (PBT) in the melt leading to the formation of high molecular mass poly(1,4-butylene terephthalate-co-DL-lactide) (BLA) copolymers. The analysis from 1H NMR reveals that transesterification between butylene terephthalate (BT) and lactide (LA) segments during synthesis has occurred. The BLA copolymers are segmented copolyesters with random arrangement, as shown by the sequence structure of BLA copolyester chains and as confirmed by their thermal behavior. The BLA copolyesters show only one melting temperature ( Tm), crystallization temperature ( Tc), and thermal decomposition temperature ( T d) when the reaction between PBT and OLA takes place at 280°C for more than 0.5 h. With increased OLA composition, the Tm, Tc and Td decrease due to fewer aromatic sequences. The copolyester with a PBT/OLA starting molar ratio of 5.9/94.1 is soluble in chloroform, while pristine PBT is only soluble in mixed chloroform/phenol solvent. Conventional size-exclusion chromatography (SEC) polystyrene calibration determined weight-average molecular weight of the copolyester (5.9/94.1 mol mol-1 PBT/OLA) to be 11200 g mol-1.
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Affiliation(s)
- Xiang Jun Zhu
- Institute of Polymer Materials, School of Materials Science and Engineering, Nanchang University, Xuefu Road 999, Nanchang 330031, People's Republic of China
| | - Yiwang Chen
- Institute of Polymer Materials, School of Materials Science and Engineering, Nanchang University, Xuefu Road 999, Nanchang 330031, People's Republic of China,
| | - Jiying Suxiaohui He
- Institute of Polymer Materials, School of Materials Science and Engineering, Nanchang University, Xuefu Road 999, Nanchang 330031, People's Republic of China
| | - Licheng Tan
- Department of Chemistry, School of Science, Nanchang University, Xuefu Road 999, Nanchang 330031, People's Republic of China
| | - Yang Wang
- The First Affiliated Hospital of Nanchang University, Yongwaizheng Road 17, Nanchang 330006, People's Republic of China
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19
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Synthesis of poly(ethylene adipate) and poly(ethylene adipate-co-terephthalate) via ring-opening polymerization. Eur Polym J 2007. [DOI: 10.1016/j.eurpolymj.2007.05.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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20
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Preparation and characterization of aliphatic/aromatic copolyesters based on bisphenol-A terephthalate, hexylene terephthalate and lactide mioties. REACT FUNCT POLYM 2007. [DOI: 10.1016/j.reactfunctpolym.2007.02.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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El Fray M, Feldmann M, Ziegler G, Prowans P. Preparation and bioactivity of novel multiblock thermoplastic elastomer/tricalcium phosphate composites. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2007; 18:501-6. [PMID: 17334701 DOI: 10.1007/s10856-007-2010-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2005] [Accepted: 10/24/2005] [Indexed: 05/12/2023]
Abstract
There is a recognized need for improved treatment of osteoarthritis of the finger joints disease. Joint fusions are commonly used for treating the pain and potential deformity of arthritis. At severe deformity, artificial joint replacement is required. The most widely used are space-filler type joints made of high performance silicone rubber. One of the problems that occurs with these artificial replacements is that they can fail, because silicone elastomer used for their fabrication is relatively weak material and show to break apart and fragment. We have recently developed novel poly(aliphatic/aromatic-ester) (PED) material of sufficient mechanical properties and excellent flexibility. To enhance the bioactivity of these polymers (PED) and bone-bonding properties, PED/beta-TCP composites were prepared. The ceramic particles were homogeneously distributed during conventional blending and showed good adhesion to the polymer matrix. The thermal characteristics and mechanical properties of the composites were investigated as a function of beta-TCP content. The Youngs modulus and the yield strength of the composites increased with the increase in beta-TCP volume while the tensile strength and fracture strain decreased. In vitro investigations demonstrated an increase in cytocompatibility with increasing amount of beta-TCP up to 20 vol%.
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Affiliation(s)
- M El Fray
- Szczecin University of Technology, Polymer Institute, Szczecin, Poland.
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Wang L, Xie Z, Bi X, Wang X, Zhang A, Chen Z, Zhou J, Feng Z. Preparation and characterization of aliphatic/aromatic copolyesters based on 1,4-cyclohexanedicarboxylic acid. Polym Degrad Stab 2006. [DOI: 10.1016/j.polymdegradstab.2006.01.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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23
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El Fray M, Prowans P, Puskas JE, Altstädt V. Biocompatibility and fatigue properties of polystyrene-polyisobutylene-polystyrene, an emerging thermoplastic elastomeric biomaterial. Biomacromolecules 2006; 7:844-50. [PMID: 16529422 DOI: 10.1021/bm050971c] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This paper will discuss the biocompatibility and dynamic fatigue properties of polystyrene-b-polyisobutylene-b-polystyrene thermoplastic elastomer with 30 wt % polystyrene (SIBS30), an emerging FDA-approved biomaterial. SIBS30 is a very soft, transparent biomaterial resembling silicone rubber, with superior mechanical properties. Using the hysteresis method adopted for soft biomaterials, the dynamic fatigue properties of SIBS30 were found to be between those of polyurethane and silicone rubber, with fatigue life twice as long as that of silicone. Under single load testing (SLT, 1.25 MPa), SIBS30 displayed less than half the dynamic creep compared to silicone, both in air and in vitro (37 degrees C, simulated body fluid). Hemolysis and 30- and 180-day implantation studies revealed excellent biocompatibility of the new biomaterial. The results presented in this paper indicate that, in comparison with silicone rubber, SIBS30 has similar biocompatibility and superior dynamic fatigue properties.
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Affiliation(s)
- Miroslawa El Fray
- Biomaterials and Functional Polymers Laboratory, Polymer Institute, Szczecin University of Technology, Pulaskiego 10, 70-322 Szczecin, Poland
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Kannan RY, Salacinski HJ, Vara DS, Odlyha M, Seifalian AM. Review paper: Principles and Applications of Surface Analytical Techniques at the Vascular Interface. J Biomater Appl 2006; 21:5-32. [PMID: 16684795 DOI: 10.1177/0885328206065728] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Surface properties have been found to be one of the key parameters which cause degradation and of thrombogenicity in all polymers used in biomedical devices, thus signifying the importance and the necessity for quantitative and accurate characterization of the polymer surface itself as used in the construction of the device. The characterization techniques employed generally involve thermal and spectroscopic measurements, in which class the electrochemical investigations and scanning probe microscopies can also be included. Current hypotheses on the correlations that exist between surface parameters and hemocompatibility and degradation of polymers are examined herein, but concentrating on the field of clinically utilized polymeric materials as used within medical devices themselves. Furthermore, this review provides a brief but complete synopsis of these techniques and other emerging ones, which have proven useful in the analysis of the surface properties of polymeric materials as used in the construction of cardiovascular devices. Statements and examples are given as to how specific information can be acquired from these differing methodologies and how it aids in the design and development of new polymers for usage in biomedical device construction.
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Affiliation(s)
- Ruben Y Kannan
- Biomaterials & Tissue Engineering Centre (BTEC), Academic Division of Surgical and Interventional Sciences, University College London, London, UK
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