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.
Allan Abbott, a cycling enthusiast and motorcycle racer, elevated the motor-paced bicycle speed record at the Bonneville Salt Flats, reaching 223 km/h (139 mph) in 1973.he hour record for bicycles is the record for the longest distance cycled in one hour on a bicycle. The most famous type of record is for upright bicycles meeting the requirements of the Union Cycliste Internationale (UCI) for old or modern bicycles.