Apical surgery vs apical surgery with simultaneous orthograde retreatment: A prospective cohort clinical study of teeth affected by persistent periapical lesion. G Ital Endodon [Internet]. 2018 Jun. 30 [cited 2025 Oct. 11];32(1):2-8. Available from: https://www.giornaleitalianoendodonzia.it/gie/article/view/9