INTERPRETATION OF ENDODONTIC FILE LENGTHS USING RADIO VISIOGRAPHY

The purpose of this investigation was to compare RadioVisioGraphy (RVG ) imaging with conventional radiography in determining endodontic file length adjustment. Human cadaver sections with first or second molars were used. Files were inserted into canals at randomly selected lengt hs, from 4 mm short of the radiographic apex to 3 mm beyond. Radiograp hs and RVG images were evaluated to determine the adjustment needed to place the file 0.5 mm from the radiographic apex.Results showed no si gnificant difference in the ability of endodontists to make accurate f ile length adjustments using conventional radiography versus RVG. In t his study, it was found that: (a) accurate file length adjustments can be made from an image two times larger than the actual tooth; (b) RVG is not significantly better than conventional radiography; and (c) if both methods are available, RVG is preferred because of the significa nt reduction in radiation dose.