title: [Crawford and Barros helmets: critical study and suggestions for their improvement (I)].
mesh_terms: D005115:Extraoral Traction Appliances; D005592:Fracture Fixation / Q000295:instrumentation*; D006801:Humans; D008337:Mandibular Fractures / Q000628:therapy*; D008440:Maxillary Fractures / Q000628:therapy*; D009968:Orthodontic Appliances, Removable; D013165:Splints
vernacular_title: Capacetes de Crawford e de Barros: estudo crítico e sugestões para seu aperfeiçoamento (I).