title: A three-layered nano-carbonated hydroxyapatite/collagen/PLGA composite membrane for guided tissue regeneration.
abstract: Functional graded materials (FGM) provided us one new concept for guided tissue regeneration (GTR) membrane design with graded component and graded structure where one face of the membrane is porous thereby allowing cell growth thereon and the opposite face of the membrane is smooth, thereby inhibiting cell adhesion in periodontal therapy. The goal of the present study was to develop a three-layered graded membrane, with one face of 8% nano-carbonated hydroxyapatite/collagen/poly(lactic-co-glycolic acid) (nCHAC/PLGA) porous membrane, the opposite face of pure PLGA non-porous membrane, the middle layer of 4% nCHAC/PLGA as the transition through layer-by-layer casting method. Then the three layers were combined well with each other with flexibility and enough high mechanical strength as membrane because the three layers all contained PLGA polymer that can be easily used for practical medical application. This high biocompatibility and osteoconductivity of this biodegraded composite membrane was enhanced by the nCHAC addition, for the same component and nano-level crystal size with natural bone tissue. The osteoblastic MC3T3-E1 cells were cultured on the three-layered composite membrane, the primary result shows the positive response compared with pure PLGA membrane.
authors: Department of Oral Health Science, Graduate School of Dental Medicine, Hokkaido University, Kita Ku Kita13 Nishi 7, Sapporo 060-8586, Japan. liao@den.hokudai.ac.jp
authors: Susan
authors: S
authors: Liao
authors: Wei
authors: W
authors: Wang
authors: Motohiro
authors: M
authors: Uo
authors: Shoji
authors: S
authors: Ohkawa
authors: Tsukasa
authors: T
authors: Akasaka
authors: Kazuchika
authors: K
authors: Tamura
authors: Fuzhai
authors: F
authors: Cui
authors: Fumio
authors: F
authors: Watari
mesh_terms: D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry; D001861:Bone Regeneration; D018786:Bone Substitutes / Q000737:chemistry; D001842:Bone and Bones / Q000378:metabolism; D002244:Carbon / Q000737:chemistry*; D002448:Cell Adhesion; D002460:Cell Line; D049109:Cell Proliferation; D018920:Coculture Techniques; D003094:Collagen / Q000737:chemistry*; D017886:Durapatite / Q000737:chemistry*; D005109:Extracellular Matrix / Q000378:metabolism; D048091:Guided Tissue Regeneration / Q000295:instrumentation* / Q000379:methods*; D019344:Lactic Acid / Q000737:chemistry*; D008422:Materials Testing; D051379:Mice; D008855:Microscopy, Electron, Scanning; D049329:Nanostructures / Q000737:chemistry; D036103:Nanotechnology; D010006:Osteoblasts / Q000378:metabolism; D011100:Polyglycolic Acid / Q000737:chemistry*; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011108:Polymers / Q000737:chemistry*; D013499:Surface Properties; D013997:Time Factors; D023822:Tissue Engineering / Q000295:instrumentation* / Q000379:methods*; D014961:X-Ray Diffraction
chemical_list: D001672:Biocompatible Materials; D018786:Bone Substitutes; D011108:Polymers; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid; D002244:Carbon; D003094:Collagen; D017886:Durapatite