retention groove

retention groove,

a depression formed by the opposing vertical constrictions in a prepared tooth cavity, which improves the holding ability of a restoration.

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groove,

n a linear channel or sulcus.

groove, abutment,

n a transverse groove that may be cut in the bone across the alveolar ridge to furnish positive seating for the implant framework and to prevent tension of the tissue.

groove, developmental,

n a fine depressed line in the enamel of a tooth that marks the union of the lobes of the crown in its development.

groove, gingiva, free,

n the shallow line or depression on the surface of the gingiva at the junction of the free and attached gingivae.

groove, interdental,

n a linear, vertical depression on the surface of the interdental papillae; functions as a spillway for food from the interproximal areas.

groove, labiomental,

n a natural indentation in the chin, just below the lips, that takes its form from the muscles and bones lying beneath the skin.

groove, linguogingival,

n vertical groove on the lingual surface of certain anterior teeth that originates in the lingual pit and extends cervically and slightly distal onto the cingulum.

groove, marginal,

n a developmental groove that forms across the marginal ridges of posterior teeth.

groove, nasolacrimal

n a linear depression that extends from the eye to the olfactory sac in an embryo and separates the lateral nasal process from the maxillary process.

groove, retention,

n a groove formed by opposing vertical constrictions in the preparation of a tooth that provides improved retention of the restoration.