nasolacrimal groove

nasolacrimal groove

Etymology: L, nasus, nose, lacrima, tear; D, groeve, a shallow depression

a groove on the nasal surface of the upper jaw.

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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.

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nasolacrimal

pertaining to the nose and lacrimal apparatus.

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nasolacrimal apparatus

see lacrimal duct.

nasolacrimal duct

see nasal duct.

nasolacrimal duct obstruction

may be a congenital defect or the result of infection or injury; causes tears to run down the affected side.

nasolacrimal furrow

formed in the embryo by the fusion of the two maxillary processes; develops eventually into the nasolacrimal duct.

nasolacrimal groove

nasolacrimal furrow.

nasolacrimal radiography

see dacryocystorhinography.

nasolacrimal sac

see lacrimal sac.

nasolacrimal system

includes the lacrimal ducts, lacrimal sac and nasolacrimal duct.

nasolacrimal urticaria

hay fever; an uncommon manifestation of atopy in dogs.