title: Simple acrylic occlusal key as a substitute of head holders in cephalometric orthopantomography.
authors.forename: M S
authors.initials: MS
authors.lastname: Badawi
authors.forename: M
authors.initials: M
authors.lastname: Deheis
mesh_terms: D000180:Acrylic Resins; D002508:Cephalometry / Q000295:instrumentation* / Q000379:methods; D004867:Equipment Design; D006801:Humans; D011862:Radiography, Panoramic / Q000295:instrumentation* / Q000379:methods
chemical_list: D000180:Acrylic Resins