Birgül Özaşır, Tufan Özaşır, İzel Yeşil, Zeynep Serra Arslan, Kamran Gülşahı
Turkish Endodontic Journal - 2025;10(3):218-223
Purpose: The aim of this in vitro study was to compare the effects of root canal irrigation agents-Dual Rinse HEDP, Propolis, and EDTA-on root dentin microhardness. Methods: Forty human maxillary central incisors were sectioned buccolingually to yield 80 specimens. The samples were embedded in acrylic blocks; their surfaces were sanded and polished. Thereafter they were randomly assigned to four groups (n=20 each): Saline, EDTA, DR HEDP, and Propolis. Vickers microhardness measurements were performed before and after irrigation using a 100-gf load and a 10 s dwell time. Data were analyzed by one-way ANOVA followed by Student-Newman-Keuls multiple comparison test. Results: All irrigation solutions except Saline produced a significant decrease in microhardness (p<0.05). The greatest percentage of hardness loss was observed in the Propolis group (24.24%), followed by DR HEDP (20.61%) and EDTA (19.56%). The Saline group showed no significant change (0.81%). No statistically significant differences were found among the EDTA, DR HEDP, and Propolis groups (p>0.05). Conclusion: Although not statistically significant, Dual Rinse HEDP caused a greater decrease in root dentin microhardness than EDTA.
