title: Enamel pretreatment: a critical variable in direct bonding systems.
mesh_terms: D000268:Adhesiveness; D000293:Adolescent; D002648:Child; D001840:Dental Bonding; D003743:Dental Enamel / Q000032:analysis / Q000187:drug effects*; D003799:Dental Stress Analysis; D005069:Evaluation Studies as Topic; D006801:Humans; D008854:Microscopy, Electron; D009967:Orthodontic Appliances; D010756:Phosphoric Acids / Q000494:pharmacology*; D013499:Surface Properties; D013997:Time Factors
chemical_list: D010756:Phosphoric Acids