This study intended to assess the performance of dental X-ray machines as regards time of exposure and kilovoltage with an analysis of 127 X-ray machines sold by Funk and Dabi Atlante in the South of Minas Gerais State. The values obtained, both time of exposure and kilovoltage for each model of X-ray machine studied, were organized into frequency distribution tables and presented in histograms. Results obtained, once processed, were indicative of an exposure time performance that was unsatisfactory for Funk Model X-10, whereas the Dabi Atlante machines Models Spectro II, Trophy, and Spectro 1070, proved satisfactory as to performance in a comparison of real exposure and nominal exposure times. We examined the nominal kilovoltage of these same machines and, as a whole, they showed lesser kilovoltage than that preconized, indicative of performance short of that expected. Professionals are advised of the need for periodic maintenance in order to remedy the deficiencies presented by the machines, at least in part
Frequency; Radiation; Time of exposure
