Tooth Abrasion

The pathologic wearing away of the tooth substance by brushing, bruxism, clenching, and other mechanical causes. It is differentiated from TOOTH ATTRITION in that this type of wearing away is the result of tooth-to-tooth contact, as in mastication, occurring only on the occlusal, incisal, and proximal surfaces. It differs also from TOOTH EROSION, the progressive loss of the hard substance of a tooth by chemical processes not involving bacterial action. (From Jablonski, Dictionary of Dentistry, 1992, p2) (NLM, Medical Subject Headings)

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Tooth 32

The lower right 3rd molar, as defined by the Universal tooth numbering system.

Tooth 31

The lower right 2nd molar, as defined by the Universal tooth numbering system.

Tooth 30

The first, permanent, six-year molar of the lower right arch as defined by the Universal tooth numbering system.

Tooth 2

The upper right 2nd molar, as defined by the Universal tooth numbering system.

Tooth 19

The first, permanent, six-year molar of the lower left arch as defined by the Universal tooth numbering system.

Tooth 18

The lower left 2nd molar, as defined by the Universal tooth numbering system.