How much do you know? Check out what is true and what is false below (click the question mark to find out!) as Mr Dorsey, the best teacher in this universe, challenges you - what do you know?

It is an aggravated assault in Louisiana, to bite someone with your false teeth, but simple assault if you bit someone with your natural teeth.
The enamel on your teeth is the hardest substance in your body
Most people brush their teeth for an average 90 seconds
Famous actor James Dean had no front teeth
Nylon bristles were introduced in 1938 by Colgate
In Vermont, USA, it is illegal for women to wear false teeth without the written permission of their husbands
A full set of baby teeth contains 25 teeth
The tooth is the only part of the human body that can't repair itself
The first orthodontic braces were made by Pierre Fauchard in 1974
Braces sell off the alarm in airport metal detectors