title: An investigation into the use of thermoformed special impression trays.
mesh_terms: D000180:Acrylic Resins; D003748:Dental Equipment; D003761:Dental Impression Technique / Q000295:instrumentation*; D006801:Humans; D011137:Polystyrenes
chemical_list: D000180:Acrylic Resins; D011137:Polystyrenes