Reduction of radiation output of the standard dental x-ray machine utilizing copper for external filtration.
D003300:Copper; D003762:Dental Instruments; D003813:Dentistry / Q000295:instrumentation*; D006801:Humans; D011835:Radiation Protection; D011861:Radiography, Dental; D014965:X-Rays
D003300:Copper
DENTISTRY/apparatus and instruments; RADIATION PROTECTION