title: Impaction of first permanent molars: differential diagnosis and disimpaction technique.
authors.forename: C P
authors.initials: CP
authors.lastname: McClea
mesh_terms: D003937:Diagnosis, Differential; D004867:Equipment Design; D006801:Humans; D008963:Molar; D009967:Orthodontic Appliances; D014087:Tooth Movement Techniques / Q000295:instrumentation / Q000379:methods*; D014095:Tooth, Impacted / Q000175:diagnosis / Q000628:therapy*