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.
The competition to create the fastest production motorcycle ended in a truce that lasted about 8 years, after just over a century of one-upmanship by motorcycle manufacturers that began with the 1894â1897 Hildebrand & WolfmÃ¼ller and ended with the 1999 Suzuki Hayabusa.