title: Effects of a nonrinse conditioner and 17% ethylenediaminetetraacetic acid on the etch pattern of intact human permanent enamel.
abstract: The purpose of this study was to evaluate the effects of 2 new acid-etching solutions, nonrinse conditioner (NRC) and 17% ethylenediaminetetraacetic acid (EDTA), on enamel surface morphology, and to compare the new solutions with traditional 37% phosphoric acid. The effect of prolonged etching time was also investigated. The buccal surfaces of 80 extracted third molars were etched with one of the 3 acids for 15, 30, or 60 seconds. The central regions of the specimens were examined with a scanning electron microscope. Shorter etching time with phosphoric acid resulted in a relatively smooth enamel surface compared with longer treatments. Irrespective of treatment time, NRC produced an aprismatic etch pattern, which suggested a potentially retentive morphological character. EDTA treatment had the least effect of all etchants tested.
authors.affiliation: Department of Pedodontics, Hacettepe University, Faculty of Dentistry, Ankara, Turkey. zaferc@hotmail.com
authors.forename: Z C
authors.initials: ZC
authors.lastname: Cehreli
authors.forename: N
authors.initials: N
authors.lastname: Altay
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods*; D002614:Chelating Agents / Q000008:administration & dosage*; D003461:Crystallography; D003743:Dental Enamel / Q000187:drug effects* / Q000648:ultrastructure; D003747:Dental Enamel Solubility / Q000187:drug effects; D004492:Edetic Acid / Q000008:administration & dosage*; D006801:Humans; D008298:Maleates / Q000008:administration & dosage; D008855:Microscopy, Electron, Scanning; D008964:Molar, Third; D010756:Phosphoric Acids / Q000008:administration & dosage; D013386:Succinates / Q000008:administration & dosage; D013997:Time Factors
chemical_list: D002614:Chelating Agents; D008298:Maleates; D010756:Phosphoric Acids; D013386:Succinates; C030272:maleic acid; D004492:Edetic Acid; C005229:itaconic acid