title: Differential moments: an anchorage system.
authors.forename: Malcolm
authors.initials: M
authors.lastname: Meister
authors.forename: Richard S
authors.initials: RS
authors.lastname: Masella
mesh_terms: D002648:Child; D006801:Humans; D009967:Orthodontic Appliances; D009971:Orthodontics, Corrective / Q000295:instrumentation / Q000379:methods*; D010685:Philosophy, Dental; D012008:Recurrence; D013027:Space Maintenance, Orthodontic; D014081:Tooth Extraction