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Nie WC, Dang HC, Wang XL, Song F, Wang YZ. One-step enzymatic synthesis of poly(p-dioxanone-co-butylene-co-succinate) copolyesters with well-defined structure and enhanced degradability. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.01.055] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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2
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Xichen Zhang, Wyss UP, Pichora D, Goosen MF. An Investigation of Poly(lactic acid) Degradation. J BIOACT COMPAT POL 2016. [DOI: 10.1177/088391159400900105] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
To elucidate the degradation mechanism of poly(lactic acid), the decrease in the intrinsic viscosity of poly(D,L-lactide) in a homogeneous water/ acetone solution was investigated. The hydrolysis of poly(D,L-lactic acid) in water/acetone solution can be catalyzed by protons. The molecular weight degradation of solid poly(D,L-lactic acid) in water was primarily affected by the degree of polymer purity. Polymerization conditions such as initiator concen tration, temperature and time did not have an obvious effect on the molecular weight degradation. In the case of polymer samples with low purity (i.e., directly polymerized or containing solvent or oligomer), degradation was ini tially very rapid. On the other hand, initial degradation of purified polymer was very slow before accelerating.
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Affiliation(s)
- Xichen Zhang
- Queen's University Kingston, Ontario, Canada K7L 3N6
| | - Urs P. Wyss
- Queen's University Kingston, Ontario, Canada K7L 3N6
| | - David Pichora
- Queen's University Kingston, Ontario, Canada K7L 3N6
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3
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Gilmore J, Burg T, Groff RE, Burg KJL. Design and optimization of a novel bio-loom to weave melt-spun absorbable polymers for bone tissue engineering. J Biomed Mater Res B Appl Biomater 2016; 105:1342-1351. [DOI: 10.1002/jbm.b.33700] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Revised: 03/26/2016] [Accepted: 04/14/2016] [Indexed: 01/06/2023]
Affiliation(s)
- Jordon Gilmore
- Department of Bioengineering; College of Engineering and Science; Clemson University; Clemson, SC USA
| | - Timothy Burg
- Department of Veterinary Biosciences and Diagnostic Imaging; College of Veterinary Medicine, University of Georgia; Athens GA USA
| | - Richard E. Groff
- Department of Electrical and Computer Engineering; College of Engineering and Science, Clemson University; Clemson SC USA
| | - Karen J. L. Burg
- Department of Small Animal Medicine and Surgery; College of Veterinary Medicine, University of Georgia; Athens GA USA
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Kundys A, Plichta A, Florjańczyk Z, Frydrych A, Żurawski K. Screening of metal catalysts influence on the synthesis, structure, properties, and biodegradation of PLA-PBA triblock copolymers obtained in melt. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pola.27576] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Anna Kundys
- Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw
| | - Andrzej Plichta
- Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw
| | - Zbigniew Florjańczyk
- Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw
| | - Anita Frydrych
- Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw
| | - Konrad Żurawski
- Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw
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5
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Anionic polymerization of cyclic ester and amide in miniemulsion: Synthesis and characterization of poly(ε-caprolactone) and poly(ε-caprolactone-co-ε-caprolactam) nanoparticles. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.24287] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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6
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Duda A, Kowalski A, Penczek S, Uyama H, Kobayashi S. Kinetics of the Ring-Opening Polymerization of 6-, 7-, 9-, 12-, 13-, 16-, and 17-Membered Lactones. Comparison of Chemical and Enzymatic Polymerizations. Macromolecules 2002. [DOI: 10.1021/ma012207y] [Citation(s) in RCA: 127] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Andrzej Duda
- Department of Polymer Chemistry, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, PL-90−363 Lodz, Poland; and Department of Materials Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan
| | - Adam Kowalski
- Department of Polymer Chemistry, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, PL-90−363 Lodz, Poland; and Department of Materials Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan
| | - Stanislaw Penczek
- Department of Polymer Chemistry, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, PL-90−363 Lodz, Poland; and Department of Materials Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan
| | - Hiroshi Uyama
- Department of Polymer Chemistry, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, PL-90−363 Lodz, Poland; and Department of Materials Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan
| | - Shiro Kobayashi
- Department of Polymer Chemistry, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, PL-90−363 Lodz, Poland; and Department of Materials Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan
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7
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Ponsart S, Coudane J, Vert M. A novel route to poly(epsilon-caprolactone)-based copolymers via anionic derivatization. Biomacromolecules 2002; 1:275-81. [PMID: 11710111 DOI: 10.1021/bm005521t] [Citation(s) in RCA: 107] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Poly(epsilon-caprolactone) (PCL) is known to biodegrade under composting or water sewage plant conditions. However, as compared with poly(alpha-hydroxy acids) derived from lactic and glycolic acids, PCL is much more resistant to chemical hydrolysis and is achiral, a feature that limits very much the possibility of property modulation through the configurational structure of polymer chains. For the sake of enlarging the family of PCL-type polymers, a novel method is proposed which is based on the anionic activation of PCL chain by the removal of a proton from the methylene group in alpha-position of the ester carbonyl present in the main chain, using a nonnucleophilic base such as lithium diisopropyl amide (LDA). This activation leads to a polycarbanion onto which various electrophile groups can be attached. The feasibility of the process was first shown on poly(methyl acrylate), (PMA), whose polyacrylic main chain is resistant to strong bases. The PMA polycarbanion was modified by various electrophiles, namely benzaldehyde, naphthoyl chloride, benzyl chloroformate, and iodomethane. In a second stage, the same reactions were performed successfully on PCL. The degree of substitution depended on the experimental conditions. PCL underwent main chain degradation during the formation of the polycarbanion whereas the reaction with the electrophiles did not cause any further main chain cleavages. The degradation of PCL chains can be limited enough to give access to novel functional PCL polymers.
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Affiliation(s)
- S Ponsart
- Centre de Recherche sur les Biopolymères Artificiels, Faculty of Pharmacy, 15, Avenue Charles Flahault, 34060 Montpellier, France
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8
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Pezzin A, Duek E. Hydrolytic degradation of poly(para-dioxanone) films prepared by casting or phase separation. Polym Degrad Stab 2002. [DOI: 10.1016/s0141-3910(02)00174-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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9
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Polacco G, Cascone MG, Lazzeri L, Ferrara S, Giusti P. Biodegradable hollow fibres containing drug-loaded nanoparticles as controlled release systems. POLYM INT 2002. [DOI: 10.1002/pi.1086] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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10
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Storey RF, Mullen BD, Melchert KM. SYNTHESIS OF NOVEL HYDROPHILIC POLY(ESTER-CARBONATES) CONTAINING PENDENT CARBOXYLIC ACID GROUPS. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2001. [DOI: 10.1081/ma-100104943] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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11
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Minuth WW, Schumacher K, Strehl R, Kloth S. Physiological and cell biological aspects of perfusion culture technique employed to generate differentiated tissues for long term biomaterial testing and tissue engineering. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2001; 11:495-522. [PMID: 10896044 DOI: 10.1163/156856200743832] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Optimal results in biomaterial testing and tissue engineering under in vitro conditions can only be expected when the tissue generated resembles the original tissue as closely as possible. However, most of the presently used stagnant cell culture models do not produce the necessary degree of cellular differentiation, since important morphological, physiological, and biochemical characteristics disappear, while atypical features arise. To reach a high degree of cellular differentiation and to optimize the cellular environment, an advanced culture technology allowing the regulation of differentiation on different cellular levels was developed. By the use of tissue carriers, a variety of biomaterials or individually selected scaffolds could be tested for optimal tissue development. The tissue carriers are to be placed in perfusion culture containers, which are constantly supplied with fresh medium to avoid an accumulation of harmful metabolic products. The perfusion of medium creates a constant microenvironment with serum-containing or serum-free media. By this technique, tissues could be used for biomaterial or scaffold testing either in a proliferative or in a postmitotic phase, as is observed during natural development. The present paper summarizes technical developments, physiological parameters, cell biological reactions, and theoretical considerations for an optimal tissue development in the field of perfusion culture.
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Affiliation(s)
- W W Minuth
- Department of Anatomy, University of Regensburg, Germany.
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12
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Ponsart S, Coudane J, Morgat JL, Vert M. Synthesis of3H and fluorescence-labelled poly (DL-Lactic acid). J Labelled Comp Radiopharm 2001. [DOI: 10.1002/jlcr.495] [Citation(s) in RCA: 14] [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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Kowalski A, Duda A, Penczek S. Kinetics and Mechanism of Cyclic Esters Polymerization Initiated with Tin(II) Octoate. 3. Polymerization of l,l-Dilactide. Macromolecules 2000. [DOI: 10.1021/ma000125o] [Citation(s) in RCA: 356] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Adam Kowalski
- Department of Polymer Chemistry, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, PL-90−363 Lodz, Poland
| | - Andrzej Duda
- Department of Polymer Chemistry, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, PL-90−363 Lodz, Poland
| | - Stanislaw Penczek
- Department of Polymer Chemistry, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, PL-90−363 Lodz, Poland
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14
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Kowalski A, Libiszowski J, Duda A, Penczek S. Polymerization of l,l-Dilactide Initiated by Tin(II) Butoxide. Macromolecules 2000. [DOI: 10.1021/ma991751s] [Citation(s) in RCA: 222] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Adam Kowalski
- Department of Polymer Chemistry, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, PL-90-363 Lodz, Poland
| | - Jan Libiszowski
- Department of Polymer Chemistry, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, PL-90-363 Lodz, Poland
| | - Andrzej Duda
- Department of Polymer Chemistry, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, PL-90-363 Lodz, Poland
| | - Stanislaw Penczek
- Department of Polymer Chemistry, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, PL-90-363 Lodz, Poland
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15
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Ge H, Hu Y, Yang S, Jiang X, Yang C. Preparation, characterization, and drug release behaviors of drug-loaded ?-caprolactone/L-lactide copolymer nanoparticles. J Appl Polym Sci 2000. [DOI: 10.1002/(sici)1097-4628(20000214)75:7<874::aid-app3>3.0.co;2-g] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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16
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ARVANITOYANNIS IOANNISS. Totally and Partially Biodegradable Polymer Blends Based on Natural and Synthetic Macromolecules: Preparation, Physical Properties, and Potential as Food Packaging Materials. ACTA ACUST UNITED AC 1999. [DOI: 10.1081/mc-100101420] [Citation(s) in RCA: 235] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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17
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Dubois P, Krishnan M, Narayan R. Aliphatic polyester-grafted starch-like polysaccharides by ring-opening polymerization. POLYMER 1999. [DOI: 10.1016/s0032-3861(98)00110-4] [Citation(s) in RCA: 126] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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18
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Li SM, Espartero JL, Foch P, Vert M. Structural characterization and hydrolytic degradation of a Zn metal initiated copolymer of L-lactide and epsilon-caprolactone. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 1997; 8:165-87. [PMID: 8996692 DOI: 10.1163/156856296x00237] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A bioresorbable aliphatic polyester was synthesized by bulk copolymerization of a 1/1 M/M L,L-lactide/epsilon-caprolactone mixture using zinc metal as initiator. The actual composition of the copolymer was found to be 1.5/1 as deduced from 1H NMR spectra obtained in DMSO-d6 solutions where higher resolution was obtained as compared with chlorinated solvents. Resonances due to L-lactyl units (L) exhibited triads stereosensitivity, epsilon-oxycaproyl units (C) being sensitive to dyads. Average lengths of both poly(lactic acid) and polycaprolactone sequences were evaluated and showed the presence of rather long PLA blocks. Furthermore, no CLC triad signal was found, suggesting the absence of transesterification rearrangements. 10 x 10 x 2 mm specimens made of the copolymer were allowed to age in isoosmolar pH = 7.4 phosphate buffer at 37 degrees C. Degradation was monitored by various analytical techniques such as SEC, X-ray diffractometry, DSC, and 1H NMR. Data were compared with the behaviour of PCL and PLA homopolymers allowed to age under similar conditions. Crystallinity and composition changes are discussed in terms of preferential degradation in L- and C-containing amorphous domains, crystallized long PLA blocks being much more resistant.
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Affiliation(s)
- S M Li
- CRBA-URA CNRS 1465, University Montpellier 1, Faculty of Pharmacy, France
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19
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Kricheldorf HR, Lossin M. Polylactones. 34. Polymerizations of meso-andrac-D, L-Lactide by Means of Grignard Reagents. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 1997. [DOI: 10.1080/10601329708014945] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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20
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Dubois P, Ropson N, Jérôme R, Teyssié P. Macromolecular Engineering of Polylactones and Polylactides. 19. Kinetics of Ring-Opening Polymerization of ε-Caprolactone Initiated with Functional Aluminum Alkoxides. Macromolecules 1996. [DOI: 10.1021/ma951738h] [Citation(s) in RCA: 132] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ph. Dubois
- Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman, B6, 4000 Liège, Belgium
| | - N. Ropson
- Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman, B6, 4000 Liège, Belgium
| | - R. Jérôme
- Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman, B6, 4000 Liège, Belgium
| | - Ph. Teyssié
- Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman, B6, 4000 Liège, Belgium
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21
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The synthesis of a homochiral methacrylate macromonomer by polymerisation of (R)- or (S)-methyl ?-hydroxyisobutyrate. Polym Bull (Berl) 1996. [DOI: 10.1007/bf00319230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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22
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Nakayama A, Kawasaki N, Arvanitoyannis I, Iyoda J, Yamamoto N. Synthesis and degradability of a novel aliphatic polyester: poly(β-methyl-δ-valerolactone-co-L-lactide). POLYMER 1995. [DOI: 10.1016/0032-3861(95)93933-d] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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24
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Arvanitoyannis I, Nakayama A, Kawasaki N, Yamamoto N. Novel star-shaped polylactide with glycerol using stannous octoate or tetraphenyl tin as catalyst: 1. Synthesis, characterization and study of their biodegradability. POLYMER 1995. [DOI: 10.1016/0032-3861(95)94344-s] [Citation(s) in RCA: 106] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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25
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Arvanitoyannis I, Nakayama A, Kawasaki N, Yamamoto N. Synthesis and study of novel biodegradable oligo(ester amide)s based on sebacic acid, octadecanedioic acid, 1,6-hexanediamine and ɛ-caprolactone: 2. POLYMER 1995. [DOI: 10.1016/0032-3861(95)93118-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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26
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Novel polylactides with aminopropanediol or aminohydroxymethylpropanediol using stannous octoate as catalyst; synthesis, characterization and study of their biodegradability: 2. POLYMER 1995. [DOI: 10.1016/0032-3861(95)95307-m] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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27
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Coombes AG, Meikle MC. Resorbable synthetic polymers as replacements for bone graft. CLINICAL MATERIALS 1993; 17:35-67. [PMID: 10150176 DOI: 10.1016/0267-6605(94)90046-9] [Citation(s) in RCA: 129] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The potential of resorbable synthetic polymers derived from the poly(alpha-hydroxy acids), poly(lactide) and poly(glycolide), to fulfill a role as bone graft substitutes is reviewed. The various elements of the relationship between the degradation behaviour of resorbable implants and polymer synthesis and chain structure, implant morphology, processing and dimensions have been defined. The production of resorbable polymeric implants has been extensively documented so as to provide a wide basis for selection of an appropriate manufacturing technique. The key requirement of implant dimensional stability over the early stages of bone healing is emphasised so as to provide a stable surface on which osteoblasts and/or their precursor cells may migrate and secrete bone matrix. Minimisation of the content of slow resorbing polymers such as poly(L-lactide) is recommended, consistent with retention of an adequate implant degradation characteristic. The review concludes with a summary of alternative resorbable polymers such as the polyphosphazines which are interesting candidate materials for bone repair and reconstruction.
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Affiliation(s)
- A G Coombes
- Department of Pharmaceutical Sciences, University of Nottingham, University Park, UK
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