Saunders, W P The effect of smear layer upon the coronal leakage of gutta-percha fillings and a glass ionomer sealer. [electronic resource] - International endodontic journal Sep 1992 - 245-9 p. digital Publication Type: Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial ISSN: 0143-2885 Standard No.: 10.1111/j.1365-2591.1992.tb01157.x doi Subjects--Topical Terms: CitratesCitric AcidDental LeakageDentin-Bonding AgentsGlass Ionomer CementsGutta-PerchaHumansRoot Canal Filling MaterialsSmear LayerZinc Oxide-Eugenol Cement