title: Effect of low-surface-tension EDTA solutions on the wettability of root canal dentin.
abstract: OBJECTIVE
  This study was conducted to evaluate the effect of reducing the surface tension of ethylenediaminetetraacetic acid (EDTA) solutions on the wettability of root canal dentin.
  
  
  METHODS
  Forty-two extracted teeth were sectioned at the crown, and the apical third and remaining mid-root portion was bisected longitudinally. The root halves were embedded in resin blocks. The experimental groups were treated with 17% EDTA, EDTA-T, and REDTA alone or followed by 2.5% NaOCl. Surface free energies of samples were calculated by measuring contact angles. Surface tension measurements of all solutions were performed with pendant drop method.
  
  
  RESULTS
  The addition of surfactant to the EDTA solution significantly decreased the surface tension of solutions (P < .01). Combined and single use of experimental solutions and NaOCl significantly decreased the water contact angle and increased the surface free energy of root canal dentin (P < .05). EDTA-T alone or combined with NaOCl also increased surface free energy compared with EDTA solution (P < .05).
  
  
  CONCLUSIONS
  The use of low-surface-tensioned EDTA compounds alone or in combination with NaOCl increased the wettability of root canal dentin.
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey. zeliha@hacettepe.edu.tr
authors.forename: Zeliha
authors.initials: Z
authors.lastname: Yilmaz
authors.forename: Berna
authors.initials: B
authors.lastname: Basbag
authors.forename: Hatice Dogan
authors.initials: HD
authors.lastname: Buzoglu
authors.forename: Menemse
authors.initials: M
authors.lastname: Gümüsderelioglu
mesh_terms: D000704:Analysis of Variance; D003786:Dental Pulp Cavity / Q000187:drug effects; D003804:Dentin / Q000187:drug effects*; D004338:Drug Combinations; D004492:Edetic Acid / Q000737:chemistry / Q000494:pharmacology*; D004735:Energy Transfer; D006801:Humans; D012388:Root Canal Irrigants / Q000737:chemistry / Q000494:pharmacology*; D012973:Sodium Hypochlorite / Q000494:pharmacology; D018709:Statistics, Nonparametric; D013500:Surface Tension; D013501:Surface-Active Agents / Q000494:pharmacology; D017155:Wettability / Q000187:drug effects
chemical_list: D004338:Drug Combinations; D012388:Root Canal Irrigants; D013501:Surface-Active Agents; D004492:Edetic Acid; D012973:Sodium Hypochlorite