title: Effects of enamel etching time on bond strength and morphology.
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods*; D001840:Dental Bonding / Q000379:methods*; D003743:Dental Enamel / Q000648:ultrastructure*; D006801:Humans; D009967:Orthodontic Appliances; D010756:Phosphoric Acids / Q000008:administration & dosage; D013718:Tensile Strength; D013997:Time Factors
chemical_list: D010756:Phosphoric Acids; C030242:phosphoric acid