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RESEARCH PRODUCT
The adaptation of mechanically softened gutta-percha to the canal walls in the presence or absence of smear layer: a scanning electron microscopic study
A. PallarésV. FausG. N. Glickmansubject
SilverMaterials scienceScanning electron microscopeRoot canalSmear layerDentistryRoot Canal Filling Materialschemistry.chemical_compoundstomatognathic systemRoot Canal ObturationmedicineHumansMethenamineGeneral DentistryTitaniumRoot Canal ObturationbiologyEpoxy Resinsbusiness.industryDental Marginal AdaptationGutta-perchabiology.organism_classificationDrug Combinationsmedicine.anatomical_structureDentinal TubulechemistrySmear LayerSodium hypochloriteDentinMicroscopy Electron ScanningDental Pulp CavityGutta-PerchabusinessBismuthLayer (electronics)Root Canal Preparationdescription
Summary The objective of this study was to compare the adaptation of mechanically softened gutta-percha to the root canal wall in the presence and absence of smear layer. The root canals of 20 freshly extracted human maxillary incisors were cleaned and shaped. Prior to obturation, 10 root canals were irrigated with 20 ml of 50% citric acid followed by 20 ml of 5.25% sodium hypochlorite. All canals were obturated with mechanical compaction of gutta-percha and AH-26 sealer. After 72h, each tooth was fractured in half. Scanning electron microscopy demonstrated that the sealer had formed a continuous layer in contact with the canal walls, becoming progressively thinner towards the apex. The sealer pentrated into the dentinal tubules along with projections of gutta-percha only in those teeth without smear layer.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1995-09-01 | International Endodontic Journal |