ABSTRACT This study evaluated the effect of glycolic acid (GA) as a final irrigant on the long‐term bond strength of AH Plus and Bio‐C Sealer. Forty‐eight single‐rooted teeth were assigned to four groups ( n = 12): ethylenediaminetetraacetic acid (EDTA) + AH Plus, glycolic acid + AH Plus, EDTA + Bio‐C Sealer, and glycolic acid + Bio‐C Sealer. The bond strength and failure pattern were evaluated immediately and after 6 months, while the interface adaptation and sealer penetrability were also assessed. Immediate bond strength did not differ between groups, but after 6 months AH Plus showed higher values than Bio‐C Sealer. The failure pattern was similar among all groups at both evaluation time points. EDTA + AH Plus exhibited superior interface adaptation compared with EDTA + Bio‐C Sealer, particularly in the cervical third. Sealer penetrability was comparable among groups. Glycolic acid produced similar outcomes to EDTA, and AH Plus maintained greater bond strength over time.
Alves et al. (Fri,) studied this question.