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.
For road bikes, 18-22mph is pretty average. The world speed record is about 82mph unassisted but that is with a special aerodynamic recumbent bike and athletic rider on the flat desert highway. It is a lot faster with drafting a car or train. In a velodrome or on an exercise bike it can also be faster.