title: Etching of young permanent teeth with acid gel--a comparison between the effect of 15 seconds & 60 seconds of etching.
abstract: The purpose of present study was to compare the effect of 15 seconds & 60 seconds of etching of young permanent teeth in vitro with 50% phosphoric acid gel using scanning electron microscope. 25 pairs of enamel surfaces selected for the study were divided into 3 experimental groups. The control group consisted of unetched enamel surfaces. In Group II, the effect of 50% phosphoric acid gel was compared with 37% phosphoric acid solution for 15 seconds whereas in group III, the effect of 15 seconds & 60 seconds of etching with 50% phosphoric acid gel was compared. The degree of etching pattern was evaluated by using scoring pattern from 1-3. Results showed no significant difference between the etching pattern obtained with the use of 37% solution and 50% gel for 15 seconds. But it was observed that etching with 50% for 15 seconds resulted in equal or even an enhanced etching pattern as compared to the pattern obtained in 60 seconds with 50% phosphoric acid gel.
authors.affiliation: Dept. of Pedodontics & Preventive Dentistry, Nair Hospital Dental College, Mumbai.
authors.forename: N R
authors.initials: NR
authors.lastname: Thosar
authors.forename: S G
authors.initials: SG
authors.lastname: Damle
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods*; D001641:Bicuspid / Q000187:drug effects / Q000648:ultrastructure; D019229:Dentition, Permanent; D004305:Dose-Response Relationship, Drug; D005782:Gels; D006801:Humans; D066298:In Vitro Techniques; D008855:Microscopy, Electron, Scanning; D010756:Phosphoric Acids / Q000008:administration & dosage / Q000494:pharmacology; D011897:Random Allocation; D013499:Surface Properties; D013997:Time Factors
chemical_list: D005782:Gels; D010756:Phosphoric Acids; C030242:phosphoric acid