nail matrix

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matrix

 [ma´triks] (pl. ma´trices) (L.)
1. the intercellular substance of a tissue, as bone matrix, or the tissue from which a structure develops, as hair or nail matrix.
2. a metal or plastic band used to provide proper form to a dental restoration, such as amalgam in a prepared cavity.
Matrices: A, Simple metal strip with a wooden wedge. B, Circumferential band of copper to encase the entire crown. From Baum et al., 1995.
bone matrix the intercellular substance of bone, consisting of collagenous fibers, ground substance, and inorganic salts.
cartilage matrix the intercellular substance of cartilage consisting of cells and extracellular fibers embedded in an amorphous ground substance.
nail matrix (matrix un´guis) the nail bed.

nail ma·trix

[TA]
the area of the corium on which the nail rests; it is extremely sensitive and presents numerous longitudinal ridges on its surface. According to some anatomists, the nail bed is the portion covered by the body of the nail, the nail bed being only the part on which the root of the nail rests.

nail matrix

See nailbed.

nail bed

(nāl bed)
The area of the corium on which the nail rests; it is extremely sensitive and presents numerous longitudinal ridges on its surface.
Synonym(s): keratogenous membrane (2) , matrix unguis.

nail matrix

transverse, fold-like invagination of embryonic ectoderm at dorsal aspects of digital termini; differentiates into keratinocytes, which undergo enzymic degradation to form nail plate; dorsal matrix forms dorsal nail plate; most distal area of ventral matrix forms ventral nail plate; remainder of matrix forms intermediate nail plate; distal limit of matrix is visible (through nail plate) as distal limit of lunula