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(A) Pre-operative radiograph of a young necrotic upper left central incisor with open apex and a periapical lesion; (B) radiograph of the calcium hydroxide medication; (C) working length radiograph of the file inducing bleeding; (D) radiograph of the coronal barrier positioned; (E) 6-months control radiograph; (F) 1-year control radiograph; (G) 2-years control radiograph; (H) 3-years control radiograph; (I) 3-years clinical image.
