Retrograde ObturationRoot Canal ObturationGutta-PerchaRoot Canal Filling MaterialsEpoxy ResinsTooth ApexDental LeakageDental Pulp CavityRoot Canal TherapyEndodonticsZinc Oxide-Eugenol CementCuspidCalcium CompoundsSilicatesDimethylpolysiloxanesAluminum CompoundsRadiography, BitewingSmear LayerCalcium SulfateSodium HypochloriteMaterials TestingDental Marginal AdaptationDental BondingStainless SteelIncisorDrug CombinationsOxidesDental CementsTooth Root