THE ROOT CANAL PROCEDURE, STEP BY STEP. 1  An opening is drilled through the biting surface to allow access to the tooth pulp. 2  Tooth roots are cleaned and disinfected using special needles and rinsing substances (e.g., sodium hypochlorite, EDTA, and chlorhexidine).
In 1973 the Widowmaker 7 was confirmed as the fastest motorcycle on Earth by Guinness Book of World Records, recording an 8.68-second 1/4 mile run at 172 mph. Obviously it's been dethroned since then, but it's still a cool piece of two-wheeled history. Most Popular.
Technically, the land speed record for a bicycle is held by Bruce Bursford, who pedaled to an astonishing 208 mph in August, 1995. Bursford's record carries a caveat, however: He was sitting on a specially designed, stationary bike with helium-filled tires and a two-foot chain ring, set on rollers.anadian cyclist Sam Whittingham holds the record for fastest speed on a flat, paved surface without using a pace vehicle; he reached 81 mph in Battle Mountain, Nevada in 2001.