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metric data among the three devices. It is suggested that conventional keratometry overestimates the total corneal power in daily practice. Copyright © 2020 Rie Hoshikawa et al.Objective To compare the efficacy of various techniques used for final irrigation on sealer penetration in the apical one-third of curved root canals. Material and Methods. Sixty-five freshly extracted maxillary first molar teeth with mesiobuccal roots having more than 20° of root curvature were used. The root canals were instrumented and randomly divided into