high labial arch

high labial arch,

a labial arch wire adapted to lie gingivally to the anterior tooth crowns with auxiliary springs that extend downward in contact with the teeth to be moved.

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arch (pl. es),

n a structure with a curved outline, such as bone.

arch bar,

n See bar, arch.

arch, basal,

n See base, apical.

arch, branchial,

n the small pouches that emerge during embryonic development on each side of the pharynx. Also known as the
pharyngeal arches.

arch, dental,

n the composite structure of the dentition and alveolar ridge or the remains thereof after the loss of some or all of the natural teeth.

arch, dental, contraction,

n See contraction.

arch, dentulous dental

n a dental arch containing natural teeth.

arch, edentulous dental

n a dental arch from which all natural teeth are missing. Also called the
residual alveolar ridge.

arch expansion,

n See expansion.

arch form,

See form, arch.

arch, high labial,

n a labial arch wire adapted so that it lies gingival to the anterior tooth crowns; it has auxiliary springs extending downward in contact with the teeth to be moved.

arch, inferior dental,

n See arch, lower.

arch length,

n the length of a dental arch, usually measured through the points of contact between adjoining teeth.

arch length, available,

n the space available for all teeth.

arch length, deficiency,

n the difference between required and available arch length.

arch length, required,

n the sum of the mesiodistal widths of all teeth.

arch, lower,

n the arch-like curve of the cutting edges and surfaces of the teeth on the mandible. Also known as the
inferior dental arch.

arch, ovoid,

n an arch that curves continuously from the molars on one side to the molars on the opposite side so that two such arches placed back to back describe an oval.

arch, palatine,

n (glossopalatine arch), the pillars of the fauces; the two arches of mucous membrane enclosing the muscles at the sides of the passage from the oral cavity to the pharynx.

arch, partially edentulous dental,

n a dental arch from which one or more but not all teeth are missing.

arch, passive lingual,

n an orthodontic appliance effective in maintaining space and preserving arch length when bilateral primary molars are prematurely lost.

arch, pharyngeal,

n See arch, branchial.

arch, removable lingual,

n an arch wire designed to fit the lingual sur-face of the teeth. It has two posts soldered on each end that fit snugly into the vertical tubes of the molar anchor bands.

arch, stationary lingual,

n an arch wire designed to fit the lingual surface of the teeth and soldered to the anchor bands.

arch, tapering,

n a dental arch that converges from molars to central incisors to such an extent that lines passing through the central grooves of the molars and premolars intersect within 1 inch (2.5 cm) anterior to the central incisors.

arch, trapezoidal

n an arch that has the same convergence as a tapering arch but to a lesser degree. The anterior teeth are somewhat square to abruptly rounded from canine tip to canine tip. The canines act as corners of the arch.

arch, U-shaped,

n a dental arch in which there is little difference in diameter (width) between the first premolars and the last molars; the curve from canine to canine is abrupt, so a dental arch in the shape of a capital U is formed.

arch width,

n the width of a dental arch. The width, which varies in all diameters between the right and left opposites, is determined by direct measurement between the canines, between the first molars, and between the second premolars. These intercanine, interpremolar, and intermolar distances can be cited as arch width.

arch wire,

n a wire applied to two or more teeth through fixed attachments to cause or guide orthodontic tooth movement.

arch wire, full,

n a wire extending from the molar region of one side of an arch to the other.

arch wire, sectional,

n a wire extending to only a few teeth, usually on one side or in the anterior segment.