Dental drills (VIDEO) University of Leeds This video is under embargo. Please login to access this video. Caption Difference in aerosol spray of a conventional air-driven dental handpiece (left) vs an electric handpiece (right) Credit University of Leeds Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.