title: Direct bonding of orthodontic brackets (I).
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D000180:Acrylic Resins; D001840:Dental Bonding / Q000379:methods*; D006801:Humans; D009967:Orthodontic Appliances
chemical_list: D000180:Acrylic Resins