It is estimated that 45 million Americans (and likely 4 million Canadians, keeping the population ratios of the two countries intact-my comment) suffer from bruxism. However, only 4 million guards are fabricated in the US every year.
Source: Glazer H, The Chairside "Night 'n Day Guard", Oral Health, July 2011, Vol 101, No 7, pg 45-48.
Hans Skariah, B.Sc., DMD
Promenade Court Dental Health Group in Mississauga
2233 Hurontario St., Mississauga, ON, Canada
(1/2 km north of the QEW in the Dome Building)