The daily chewing duties
Take their toll
Unfortunately modern stresses place additional strains on teeth.
Clenching and grinding teeth can wear teeth prematurely.
Like constantly rubbing a pencil it wears down.
As teeth wear, they become blunter to chew.
The inner surfaces are softer, so wear at a faster rate.
So the wear gets worse.
As this happens, the jawline and side profile of the face will change, as the height of the teeth change.