title: Effect of rhBMP-2 with PLGA/gelatin sponge type (PGS) carrier on alveolar ridge augmentation in dogs.
abstract: Recombinant human bone morphogenetic protein-2 has been shown to promote bone formation because of its osteoinductive property. The purpose of this study was to evaluate the efficacy of rhBMP-2 delivered on a poly (D, L-lactic-co-glycolic acid) copolymer/gelatin sponge (PGS) in vertical alveolar ridge augmentation on height-reduced edentulous mandible to verify the retention of rhBMP-2 withstanding the pressure of soft tissues. Coronal defects of the alveolar bone were created in six adult beagle dogs. After a healing period of 9 weeks, PGSs with or without rhBMP-2 (0 or 0.4 mg mL(-1)) were implanted on the defects(6 mm in height, 30 mm in length, 8 mm in width). Sixteen weeks after implantation, the bone mineral content (BMC) and the total bone area were measured by peripheral quantitative computed tomography. The BMC and the total bone area of the defect sites with rhBMP-2 group were significantly greater (133+/-33 mg mm(-1), 277+/-54 mm2, respectively) than those of the control group (80+/-19 mg mm(-1), 155+/-49 mm2, respectively) (P<0.01, P<0.0001, respectively; paired t-test). From the histological analyses, the height of newly formed bone in the experimental group was greater than that of the control group (4.3+/-0.9 mm, 0.22+/-0.28 mm, P<0.0001, n=6, paired t-test). These results indicate that PGS has characteristics of effective bone graft substitutes for implantation of rhBMP-2 on vertical alveolar ridge augmentation in huge defect of mandibles in dogs.
authors.affiliation: Section of Periodontology, Department of Hard Tissue Engineering, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan. Noriko.peri@tmd.ac.jp
authors.forename: N
authors.initials: N
authors.lastname: Kawakatsu
authors.forename: S
authors.initials: S
authors.lastname: Oda
authors.forename: A
authors.initials: A
authors.lastname: Kinoshita
authors.forename: S
authors.initials: S
authors.lastname: Kikuchi
authors.forename: H
authors.initials: H
authors.lastname: Tsuchioka
authors.forename: T
authors.initials: T
authors.lastname: Akizuki
authors.forename: C
authors.initials: C
authors.lastname: Hayashi
authors.forename: S
authors.initials: S
authors.lastname: Kokubo
authors.forename: I
authors.initials: I
authors.lastname: Ishikawa
authors.forename: Y
authors.initials: Y
authors.lastname: Izumi
mesh_terms: D000540:Alveolar Ridge Augmentation / Q000379:methods*; D000818:Animals; D001672:Biocompatible Materials; D001696:Biomechanical Phenomena; D015519:Bone Density / Q000187:drug effects; D055396:Bone Morphogenetic Protein 2; D019485:Bone Morphogenetic Proteins / Q000494:pharmacology*; D001861:Bone Regeneration / Q000187:drug effects*; D004285:Dogs; D004337:Drug Carriers; D005780:Gelatin; D019344:Lactic Acid; D008297:Male; D008334:Mandible / Q000000981:diagnostic imaging / Q000187:drug effects / Q000601:surgery*; D011100:Polyglycolic Acid; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011994:Recombinant Proteins / Q000494:pharmacology*; D014057:Tomography, X-Ray Computed; D016212:Transforming Growth Factor beta / Q000494:pharmacology*; D014945:Wound Healing / Q000187:drug effects / Q000502:physiology
chemical_list: D001672:Biocompatible Materials; D055396:Bone Morphogenetic Protein 2; D019485:Bone Morphogenetic Proteins; D004337:Drug Carriers; D011994:Recombinant Proteins; D016212:Transforming Growth Factor beta; C499469:recombinant human bone morphogenetic protein-2; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid; D005780:Gelatin