matrix holder

matrix holder.

See matrix retainer.

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holder,

n an apparatus or instrument that is used to hold something.

film holder, precision,

n a stainless steel device used to hold the film firmly in place during a dental radiographic procedure, which provides the rectangular collimation necessary for the paralleling technique.

film holder, Rinn X-C-P,

n a name brand reusable film-positioning device with aiming capability made from a combination of plastic and stainless steel that is especially suited to the paralleling technique.

Ilm holder, Stabe,

n.pr a name brand disposable film-positioning device made from styrofoam that is especially suited to the paralleling or bisecting angle techniques.

holder, broach,

n See broach holder.

holder, clamp,

n See holder, rubber dam clamp.

holder, matrix,

n See retainer, matrix.

holder, rubber dam,

n an apparatus used to hold a rubber dam in place on the face and to secure the edges of the dam clear of the field of operation.

holder, rubber dam clamp (clamp holder),

n See forceps, rubber dam clamp.

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matrix (mā´triks),

n 1. an intergranular substance that acts somewhat as a cementing material for other particles; e.g., zinc phosphate cement is made of undissolved zinc oxide particles, surrounded and held or cemented together by phosphate compounds. The phosphate compounds make up the matrix.
n 2. a mechanical or artificial wall that completes the mold into which plastic material is inserted.
n 3. a mold into which something is formed. See also bone; splint.

matrix, amalgam,

n a metal form, usually of stainless steel, about 0.0015 to 0.002 inch thick, adapted to a prepared cavity to supply the missing wall so that the plastic amalgam will be confined when it is condensed into the cavity.

matrix, celluloid,

n a strip of celluloid used to mold cement into the desired shape. See also strip, plastic.

matrix, custom,

n a matrix made especially for a given location, tooth, or preparation.

matrix, fibrous, of alveolar bone,

n collagen fibers in the alveolar bone, calcified by the accumulation of hydroxyapatite, a calcium salt.

matrix, fibrous, of bone,

n a component of bone tissue consisting of collagen fibers.

matrix, fibrous, of periodontal ligament,

n major component consisting of collagen and oxytalan fibers whose function is to provide support to the tooth.

matrix holder,

n See retainer, matrix.

matrix, intermicrobial

(in´turmīkrō´bēl),
n an intercellular substance found in plaque, which is made from derivatives of saliva, gingival fluids, and microorganisms.

matrix, mechanical,

n (proprietary matrix), a patented or manufactured type of matrix.

matrix, plastic,

n a matrix of resin or plastic for use with cold-curing resin or cement.

matrix, platinum,

n a matrix of wrought platinum foil, usually 0.001 inch or thinner, adapted to a die of a preparation for a fired porcelain restoration; serves as a vehicle to carry and maintain the applications of porcelain when they are placed in a furnace for firing.

matrix, proprietary,

n See matrix, mechanical.

matrix retainer,

n a mechanical device used to secure the ends of metal or plastic bands around a tooth to provide a form into which a restorative material can be condensed to replace a portion of tooth substance removed in cavity preparation. See also retainer, matrix.

matrix, T-band,

n a matrix material cut with a T-shaped projection at one end; the lugs are bent over to engage the band as it encircles the tooth.