title: Guided bone regeneration by poly(lactic-co-glycolic acid) grafted hyaluronic acid bi-layer films for periodontal barrier applications.
abstract: A novel protocol for the synthesis of biocompatible and degradation controlled poly(lactic-co-glycolic acid) grafted hyaluronic acid (HA-PLGA) was successfully developed for periodontal barrier applications. HA was chemically modified with adipic acid dihydrazide (ADH) in the mixed solvent of water and ethanol, which resulted in a high degree of HA modification up to 85 mol.%. The stability of HA-ADH to enzymatic degradation by hyaluronidase increased with ADH content in HA-ADH. When the ADH content in HA-ADH was higher than 80 mol.%, HA-ADH became soluble in dimethyl sulfoxide and could be grafted to the activated PLGA with N,N'-dicyclohexyl carbodiimide and N-hydroxysuccinimide. The resulting HA-PLGA was used for the preparation of biphasic periodontal barrier membranes in chloroform. According to in vitro hydrolytic degradation tests in phosphate buffered saline, HA-PLGA/PLGA blend film with a weight ratio of 1/2 degraded relatively slowly compared to PLGA film and HA coated PLGA film. Four different samples of a control, OSSIX(TM) membrane, PLGA film, and HA-PLGA/PLGA film were assessed as periodontal barrier membranes for the calvarial critical size bone defects in SD rats. Histological and histomorphometric analyses revealed that HA-PLGA/PLGA film resulted in the most effective bone regeneration compared to other samples with a regenerated bone area of 63.1% covering the bone defect area.
authors.affiliation: Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-dong, Nam-gu, Pohang, Kyungbuk 790-784, Republic of Korea.
authors.forename: Jung Kyu
authors.initials: JK
authors.lastname: Park
authors.forename: Junseok
authors.initials: J
authors.lastname: Yeom
authors.forename: Eun Ju
authors.initials: EJ
authors.lastname: Oh
authors.forename: Mallikarjuna
authors.initials: M
authors.lastname: Reddy
authors.forename: Jong Young
authors.initials: JY
authors.lastname: Kim
authors.forename: Dong-Woo
authors.initials: DW
authors.lastname: Cho
authors.forename: Hyun Pil
authors.initials: HP
authors.lastname: Lim
authors.forename: Nam Sook
authors.initials: NS
authors.lastname: Kim
authors.forename: Sang Won
authors.initials: SW
authors.lastname: Park
authors.forename: Hong-In
authors.initials: HI
authors.lastname: Shin
authors.forename: Dong Jun
authors.initials: DJ
authors.lastname: Yang
authors.forename: Kwang Bum
authors.initials: KB
authors.lastname: Park
authors.forename: Sei Kwang
authors.initials: SK
authors.lastname: Hahn
mesh_terms: D000272:Adipates / Q000737:chemistry; D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry / Q000378:metabolism; D001861:Bone Regeneration; D002234:Carbodiimides / Q000737:chemistry; D016557:Guided Tissue Regeneration, Periodontal / Q000379:methods*; D006820:Hyaluronic Acid / Q000737:chemistry* / Q000378:metabolism; D019344:Lactic Acid / Q000737:chemistry* / Q000378:metabolism; D008422:Materials Testing; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D011100:Polyglycolic Acid / Q000737:chemistry* / Q000378:metabolism; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D051381:Rats; D017207:Rats, Sprague-Dawley; D012886:Skull / Q000166:cytology / Q000473:pathology; D013388:Succinimides / Q000737:chemistry
chemical_list: D000272:Adipates; D001672:Biocompatible Materials; D002234:Carbodiimides; D013388:Succinimides; C032620:succinimide; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid; D006820:Hyaluronic Acid; C010011:adipic dihydrazide