Deonizio, Marili Doro Andrade Influence of apical patency and cleaning of the apical foramen on periapical extrusion in retreatment. [electronic resource] - Brazilian dental journal - 482-6 p. digital Publication Type: Journal Article ISSN: 1806-4760 Standard No.: 10.1590/0103-6440201302016 doi Subjects--Topical Terms: HumansRoot Canal Filling MaterialsRoot Canal Preparation--methodsTooth Apex--physiology