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.
1984 The road race becomes the first women's cycling event at the Olympics. 1985 John Howard of the US sets a new bicycle speed record of 152.284 mph. The first person to go over 150 miles an hour on a bicycle. 1995 Fred Rompelberg of the Netherlands sets a new bicycle speed record of 166.9 mph. At the time, he was 50 years old, and the world's oldest professional cyclist.