Abrasion is the loss of tooth
structure by mechanical forces from a foreign
element. If this force begins at the cementoenamel
junction, then progression of tooth loss can
be rapid since enamel is very thin in this region of
the tooth. Once past the enamel, abrasion quickly destroys
the softer dentin and cementum structures.
Possible sources of this wearing of
tooth are toothbrushes, toothpicks, floss,
and any dental appliance frequently set in and removed
from the mouth. The appearance is commonly described
as V-shaped when caused by excessive
pressure during tooth brushing.
The teeth most commonly affected are premolars