Definition: The physiologic wearing of the teeth. Also known as bruxism or grinding of the teeth.
Location: Incisal and occlusal surfaces.
Shape: A flat occlusal plane with reduced height of the crowns of the teeth.
Internal: Radiolucent on incisal/occlusal surfaces instead of radiopacity of enamel as it’s been worn away.
Number: Frequently effects all anterior teeth or all teeth in the oral cavity.
(click image to enlarge)
(note the flattening of the incisal surfaces with a radiolucent edge)
(note the overall flat or straight occlusal plane)
(note radiolucent incisal edge and decreased height of crown)