Methods: Forty-two extracted human anterior teeth were used. Mid-root portion were bisected longitudinally. The specimens were randomly assigned to seven experimental groups (n=6). The flat dentin surface was prepared with carborundum paper. Surface roughness of each dentin surface was measured with a contact profilometer (Mitutoyo SJ-400). The value of surface roughness was accepted 0.60 µm. One-half of each root samples were kept for control measurement. The experimental group were treated as follows: groups 1: 17 % EDTA, group 2: 17% EDTA followed by 2.5 % NaOCl, groups 3: REDTA, group 4: REDTA followed by 2,5 % NaOCl, group 5: EDTA-T, group 6: EDTA-T followed by 2.5 % NaOCl. Group 7: 2,5 % NaOCl. Then all samples surfaces were submerged in deionized water before contact angle measurement. Drop shape analyses system DSA 100 (Krüss, Germany) was used to measure the contact angles from top-view images of sessile drop. Statistical analysis was performed using Kruskal-Wallis test (p<0.05).
Results: There was significant difference between all groups (p<0.05). Compared to the control group; combined and single use of EDTA significantly decreased the contact angle of dentine surface. Contact angle levels were between 39,9±17,7 and -4,5±14,9.
Conclusion: Use of low surface tensioned EDTA compounds alone or in combination with NaOCl increased the wettability of root canal dentine.