One hundred thirty five new Profile files 0.04, 0.06 and Greater Taper (GT) were examined immediately upon removal from their original packages for surface debris using the SEM at a magnification of 50x. A second examination of the instruments was performed after they were cleansed in an ultrasonic bath. Results showed that in the first examination, none of the studied instruments was free of metallic spurs or foreign particles as received from the manufacturers. The ultrasonic bath used together with a cleanser solution appeared to be an effective method to minimize the surface impurities from the manufacturing process prior to use in preparing root canals in patients. This method reduces the amount of potential introduction of foreign bodies inside the root canal system.