Root Canal Working Length Determination Using the Radiovisiography Monitor Image.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
Pagination or Media Count:
The purpose of this in vitro investigation was to evaluate if an examiner could accurately determine endodontic file length adjustments from RVG video images, with enhancement, compared to E-speed radiographs. Segments of two maxillae and one mandible from human cadavers were used as the experimental specimens. Size 10 K-type endodontic files were set at various lengths from 3.0 mm short of the image apex to 1.0 mm beyond the apex for each of four experimental canals maxillary molar and canine, mandibular molar and premolar. Using an aligning device, and with a tissue equivalent, images were made using E-speed film and the RVG sensor at 70 kVp and 8 mA. Four examiners viewed the 20 images in each of the three formats x-ray, RVG positive video image, RVG contrast reversal video image and recorded the necessary length adjustments to place the tip of the file 1.0 mm coronal to the image apex. Free manipulation of the contrast enhancement control was allowed when viewing the RVG images on the monitor.
- Anatomy and Physiology