title: Ectopic eruption of permanent first molars: a simple interceptive method of treatment.
mesh_terms: D002648:Child; D006801:Humans; D008963:Molar; D009967:Orthodontic Appliances; D009972:Orthodontics, Interceptive / Q000379:methods*; D011140:Polyurethanes; D014079:Tooth Eruption, Ectopic / Q000628:therapy*
chemical_list: D011140:Polyurethanes