nail matrix

matrix /ma·trix/ (ma´triks) pl. ma´trices   [L.]

1. the intercellular substance of a tissue or the tissue from which a structure develops.

2. groundwork; the base in which or from which a thing develops.

3. a mold or form for casting.

4. a metal or plastic strip used to provide form to a dental restoration.

5. the continuous phase of a composite dental restoration.

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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.

extracellular matrix  (ECM) any substance produced by cells and excreted to the extracellular space within the tissues, serving as a scaffolding to hold tissues together and helping to determine their characteristics.

interterritorial matrix  a paler staining region among the darker territorial matrices.

nail matrix  m. unguis.

territorial matrix  basophilic matrix around groups of cartilage cells.

matrix un´guis  nail bed; also, the proximal part of the nail bed where growth occurs.

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nail matrix.

See nailbed.

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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.