title: [Basic concept of orthopedic force (author's transl)].
mesh_terms: D000818:Animals; D005115:Extraoral Traction Appliances; D000882:Haplorhini; D008445:Maxillofacial Development; D009968:Orthodontic Appliances, Removable; D009971:Orthodontics, Corrective; D012886:Skull / Q000254:growth & development