title: Fabrication and characterization of poly(D,L-lactide-co-glycolide)/hydroxyapatite nanocomposite scaffolds for bone tissue regeneration.
abstract: Conventional methods in fabrication of scaffolds based on polymer/bioceramic composites frequently make use of solution casting then particle leaching. The residues of common organic solvents can get trapped in this technique hence provide safety concerns on final scaffold. In this study, N-methyl pyrrolidone was used as an approved solvent for parenteral pharmaceutical products especially implants with acceptable toxicological profile. A combined freeze drying and solvent casting methods were adopted for complete removal of the solvent from final scaffold structure. Biodegradable scaffolds based on poly (D,L-lactide-co-glycolide) and different percentages of nanohydroxyapatite (25, 35, and, 45% w/w) were characterized thoroughly regarding porosity, pore distribution as well as their bioactivity and biocompatibility. The results showed 70-80% porosity with a size distribution in the range of 50-200 mum for different conditions. Bioactivity of the scaffolds was directly dependent on the bioceramic content in the samples according to the results. Composites and neat samples showed the same cytocompatibility profile. (c) 2010 Wiley Periodicals, Inc. J Biomed Mater Res, 2010.
authors.affiliation: Department of Materials Science and Engineering, Iran University of Science and Technology (IUST), Tehran, Iran.
authors.forename: Neda
authors.initials: N
authors.lastname: Aboudzadeh
authors.forename: Mohammad
authors.initials: M
authors.lastname: Imani
authors.forename: Mohammad Ali
authors.initials: MA
authors.lastname: Shokrgozar
authors.forename: Alireza
authors.initials: A
authors.lastname: Khavandi
authors.forename: Jafar
authors.initials: J
authors.lastname: Javadpour
authors.forename: Yousef
authors.initials: Y
authors.lastname: Shafieyan
authors.forename: Mehdi
authors.initials: M
authors.lastname: Farokhi
mesh_terms: D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry*; D001826:Body Fluids / Q000737:chemistry; D001861:Bone Regeneration / Q000502:physiology*; D002460:Cell Line; D049109:Cell Proliferation; D017886:Durapatite / Q000737:chemistry*; D048091:Guided Tissue Regeneration / Q000295:instrumentation / Q000379:methods; D006801:Humans; D019344:Lactic Acid / Q000737:chemistry*; D008422:Materials Testing; D015394:Molecular Structure; D011100:Polyglycolic Acid / Q000737:chemistry*; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D016062:Porosity; D013499:Surface Properties; D023822:Tissue Engineering / Q000295:instrumentation* / Q000379:methods; D054457:Tissue Scaffolds / Q000737:chemistry*
chemical_list: D001672:Biocompatible Materials; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid; D017886:Durapatite