title: In vitro and in vivo evaluation of the biocompatibility of a calcium phosphate/poly(lactic-co-glycolic acid) composite.
abstract: This study assess the effects of bioceramic and poly(lactic-co-glycolic acid) composite (BCP/PLGA) on the viability of cultured macrophages and human dental pulp fibroblasts, and we sought to elucidate the temporal profile of the reaction of pulp capping with a composite of bioceramic of calcium phosphate and biodegradable polymer in the progression of delayed dentine bridge after (30 and 60 days) in vivo. Histological evaluation of inflammatory infiltrate and dentin bridge formation were performed after 30 and 60 days. There was similar progressive fibroblast growth in all groups and the macrophages showed viability. The in vivo study showed that of the three experimental groups: BCP/PLGA composite, BCP and calcium hydroxide (Ca(OH)(2)) dentin bridging was the most prevalent (90 %) in the BCP/PLGA composite after 30 days, mild to moderate inflammatory response was present throughout the pulp after 30 days. After 60 days was observed dentine bridging in 60 % and necrosis in 40 %, in both groups. The results indicate that understanding BCP/PLGA composite is biocompatible and by the best tissue response as compared to calcium hydroxide in direct pulp capping may be important in the mechanism of delayed dentine bridge after 30 and 60 days.
authors.affiliation: Department of Restorative Dentistry, Dentistry Faculty, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, Belo Horizonte, MG, 31270-901, Brazil.
authors.forename: A
authors.initials: A
authors.lastname: Gala-García
authors.forename: M B H
authors.initials: MB
authors.lastname: Carneiro
authors.forename: G A B
authors.initials: GA
authors.lastname: Silva
authors.forename: L S
authors.initials: LS
authors.lastname: Ferreira
authors.forename: L Q
authors.initials: LQ
authors.lastname: Vieira
authors.forename: M M
authors.initials: MM
authors.lastname: Marques
authors.forename: R D
authors.initials: RD
authors.lastname: Sinisterra
authors.forename: M E
authors.initials: ME
authors.lastname: Cortes
mesh_terms: D001672:Biocompatible Materials; D002130:Calcium Phosphates / Q000008:administration & dosage*; D002478:Cells, Cultured; D006801:Humans; D066298:In Vitro Techniques; D019344:Lactic Acid / Q000008:administration & dosage*; D008855:Microscopy, Electron, Scanning; D011100:Polyglycolic Acid / Q000008:administration & dosage*; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer
chemical_list: D001672:Biocompatible Materials; D002130:Calcium Phosphates; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid; C020243:calcium phosphate