margin

(mar′jĭn)

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[L. margo, border]

1. A border or boundary such as the edge of a structure, or of a pathological specimen removed from the body surgically.
SEE: margo
2. In dentistry, the apical extent or boundary of enamel adjacent to the cementum of the tooth root; the junction of a restoration with the cavosurface angle of a prepared cavity in enamel.

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