Bruxism is a term that refers to excessive grinding of the teeth or clenching. It can cause a variety of problems, including excessive wear, pain in jaw muscles, or even the breaking of teeth. It falls under a broader category of TMJ disorders.
Excessive wear of the teeth
This wear may be noticed as a flattening of the back teeth, or as the shortening of front teeth. Sometimes half of the front teeth or more may be worn down. Sometimes the wear is manifested as notches in the teeth at the gumline. For years, many dentists blamed these notches on over-zealous toothbrushing, but in recent years it has been discovered that the notches are caused by slight flexing of the teeth from bruxism. These notches expose areas of dentin that may be very sensitive to cold or air.
Breaking of teeth
As teeth wear, the edges of front teeth and the cusps or corners of back teeth will begin to show microfractures or cracks. These cracks can be seen with magnified vision or an intraoral camera.
Bruxism may cause a a generalized soreness and/or a cold sensitivity in the teeth.
Growth of Tori
A taurus (plural tori) is a thickening of the bone in the jaw, usually in the area of the premolars and molars. In the upper jaw, it is usually seen in on the outside (buccal) surface of the bone. In the lower jaw, it is usually seen on the inside (lingual) surface.
—Dr. David Hall
Read Dr. Hall’s blog posts about TMJ disorder.