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 Widowmaker 7 was reportedly certified as âThe Worldâs Fastest Motorcycleâ by the Guinness Book of World Records in 1973, and along the way Potter picked up a trio of AHRA records. His fastest pass on number 7 was a run of 8.68 seconds at 172 MPH, though the end result was never as important as the performance.