title: Microscopic analysis of the quality of obturation and physical properties of MTA Fillapex.
abstract: This study analyzed the quality of obturation and physical properties of MTA Fillapex and AH Plus sealer. A sample of 30 human maxillary central incisors were instrumented with Protaper until a F5 (50/05) file. Both sealers were mixed with Rhodamine-B dye to allow visualization on a confocal laser-scanning microscope (CLSM). Next, the canals were filled using the single cone technique. After setting, all samples were sectioned at 2, 4, and 6 mm from the apex. CLSM was used to analyze the gaps and sealer penetration into the dentinal tubules. All samples were scanned 10 µm below the dentin surface and images were recorded at 100× magnification using the fluorescent mode. Additionally, the solubility, flowability and setting time of the sealers were evaluated. All the measured quantities of the examined materials were evaluated for significant differences by means of statistical analysis. The CLSM analysis of the MTA Fillapex showed the highest percentage of gaps at all sections (P = 0.0001). Physical tests revealed adequate properties for both sealers except for a higher solubility of the MTA Fillapex (P = 0.0001). The MTA Fillapex presented flowability and intratubular penetration similar to the AH Plus. Nevertheless, the MTA Fillapex sealer presented a higher solubility and considerable quantity of gaps between the sealer/dentin interface in relation to the AH Plus sealer. Clinicians must take into consideration, the quality of endodontic sealers as it is essential in the outcome of the root canal filling.
authors.affiliation: Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru - São Paulo, Brazil.
authors.forename: Pablo Andrés
authors.initials: PA
authors.lastname: Amoroso-Silva
authors.forename: Bruno Martini
authors.initials: BM
authors.lastname: Guimarães
authors.forename: Marina Angélica
authors.initials: MA
authors.lastname: Marciano
authors.forename: Marco Antonio Hungaro
authors.initials: MA
authors.lastname: Duarte
authors.forename: Bruno Cavalini
authors.initials: BC
authors.lastname: Cavenago
authors.forename: Ronald
authors.initials: R
authors.lastname: Ordinola-Zapata
authors.forename: Marcela Milanezi de
authors.initials: MM
authors.lastname: Almeida
authors.forename: Ivaldo Gomes de
authors.initials: IG
authors.lastname: Moraes
mesh_terms: D003804:Dentin / Q000648:ultrastructure; D006801:Humans; D007180:Incisor / Q000648:ultrastructure*; D018613:Microscopy, Confocal; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012389:Root Canal Obturation / Q000379:methods*; D012995:Solubility; D013499:Surface Properties
chemical_list: D012387:Root Canal Filling Materials
keywords: MTA Fillapex; confocal microscopy; physical properties