denture base

base (bās)

1. the lowest part or foundation of anything; see also basis.

2. the main ingredient of a compound.

3. in chemistry, a substance that combines with acids to form salts; a substance that dissociates to give hydroxide ions in aqueous solutions; a substance whose molecule or ion can combine with a proton (hydrogen ion); a substance capable of donating a pair of electrons (to an acid) for the formation of a coordinate covalent bond.

4. a unit of a removable dental prosthesis.

5. in genetics, a nucleotide, particularly one in a nucleic acid sequence.

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buffer base  the sum of all the buffer anions in the blood, used as an index of the degree of metabolic disturbance in the acid-base balance.

denture base  the material in which the teeth of a denture are set and which rests on the supporting tissues when the denture is in place in the mouth.

nitrogenous base  an aromatic, nitrogen-containing molecule that serves as a proton acceptor, e.g., purine or pyrimidine.

ointment base  a vehicle for the medicinal substances carried in an ointment.

purine bases  a group of chemical compounds of which purine is the base, including adenine, guanine, hypoxanthine, theobromine, uric acid, and xanthine.

pyrimidine bases  a group of chemical compounds of which pyrimidine is the base, including uracil, thymine, and cytosine.

record base  baseplate.

base of stapes  footplate.

temporary base , trial base baseplate.

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denture base

n.

1. The part of a denture that rests on the oral mucus membrane and to which teeth are attached.

2. The part of a complete or partial denture that rests on the denture foundation and to which teeth are attached.

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denture base,

the part of a denture that covers the soft tissue of the mouth. It is commonly made of resin or a combination of resins and metal. Also called saddle.

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base,

n 1. the foundation or support on which something rests; the point of attachment of a part; the principal ingredient of a material.
n 2. a compound that yields hydroxyl ions in water solution and causes neutralization of acid to form a salt and water.
3. the part of a denture that supports the prosthetic teeth and receives support from the oral mucosa, anchoring teeth, or alveolar ridge. See also basic. Opposite: acid.

base, acrylic resin,

n a denture base made of an acrylic resin.

base, apical (basal arch),

n the portion of the jawbone that gives support to the teeth.

base, cement,

n a layer of insulated, sometimes medicated dental cement placed in the deep portions of a cavity preparation to protect the pulp, reduce the bulk of the metallic restoration, or eliminate undercuts in a tapered preparation.

base, denture,

n 1. the part of a denture that fits the oral mucosa of the basal seat, restores the normal contours of the soft tissues of the dentulous oral cavity, and supports the artificial teeth.
n 2. the portion of a denture that overlies the soft tissue, usually fabricated of resin or combinations of resins and metal.

base, extension (free-end),

n a unit of a removable prosthesis that extends anteriorly or posteriorly, terminating without end support by a natural tooth.

base, film,

n a thin, flexible, transparent sheet of cellulose acetate or similar material.

base, mandibular,

n the body of the mandible, on which the teeth and alveolar tissues are situated.

base, material,

n a substance from which a denture base may be made (e.g., acrylic resin, vulcanite, polystyrene resin, and metal).

base, metal,

n the basal surface of a denture constructed of metal (e.g., aluminum, gold, and cobalt-chromium) to which the teeth are attached.

base, plastic,

n a denture base, baseplate, or record base made of a plastic material.

base, record,

n See baseplate.

base, shellac,

n a resinous material adapted to maxillary or mandibular casts to form baseplates.

base, sprue,

n See crucible former.

base, temporary,

n See baseplate.

base, tinted denture,

n a denture base that simulates the coloring and shading of natural oral tissues.

base, trial,

n See baseplate.