Bruxism, commonly known as "tooth grinding," is the process of clenching together and the grinding of the upper and lower teeth. During sleep, the biting force of clenched jaws can be up to six times greater than during waking hours.

Bruxism can cause complications over the years:
- Wear down tooth enamel
- Break fillings or other dental work
- Worsening of TMJ dysfunction
- Jaw pain, toothaches, headaches, or earaches
- Tooth sensitivity
- Tooth mobility
- Chipped teeth
- Erodes gums and supporting bones contributing to gum disease

There is no cure for bruxism; however, the condition can be managed. The most common procedure to help to allieviate pain and discomfort is a Nightguard.