It is not uncommon for people to grind their teeth heavily these days usually during sleep. This is called Bruxism.
This results in
- pains and even muscle spasms in the face and jaws.
- Cracks and chips in the teeth
- Wear and shortening of the teeth.
Longterm this can be very destructive to the teeth resulting in short stubby teeth or broken teeth.
Fitting a nightsplint interrupts the grinding , protects the teeth from wearing down further and treats the jaw symptoms(the temporomandibular joint or TMJ problems).