Radiation safety and quality assurance in US dental hygiene programmes, 1990.

A 1990 survey of US dental hygiene programmes indicated substantial advances in radiation safety and quality assurance techniques since 1985. None the less, further improvements are possible to minimize operator and patient exposure to ionizing radiation from dental radiography. Conversion to faster receptor speed, the use of rectangular collimation and more frequent performance of quality assurance tests represent possible improvements for some establishments.