orthodontic band

orthodontic band,

a thin metal ring, usually made of stainless steel, that is fitted over a tooth and bonded or cemented to it for securing orthodontic attachments to the tooth. See also adjustable orthodontic band.

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band [band]

1. a part, structure, or appliance that binds; for anatomical structures, see frenulum, tenia, trabecula, and vinculum.

2. in dentistry, a thin metal strip fitted around a tooth or its roots.

3. in histology, a zone of a myofibril of striated muscle.

4. in cytogenetics, a segment of a chromosome stained brighter or darker than the adjacent bands; used in identifying the chromosomes and in determining the exact extent of chromosomal abnormalities. Called Q-bands, G-bands, C-bands, T-bands, etc., according to the staining method used. See also layer, stria, and stripe.

A band the dark-staining zone of a sarcomere, whose center is traversed by the H band.

H band a pale zone sometimes seen traversing the center of the A band of a striated myofibril.

I band the band within a striated myofibril, seen as a light region under the light microscope and as a dark region under polarized light.

M band the narrow dark band in the center of the H band.

matrix band a cylindrical metal band with a special clamp or holder (the matrix retainer); it is filled with softened impression compound and seated over a tooth so that the compound flows into the prepared cavity and an impression of the tooth can be obtained. It is also used for placement and contouring of certain restorative materials.

orthodontic band a band fitted over a tooth to anchor an orthodontic fixed appliance.

Z band a thin membrane in a myofibril, seen on longitudinal section as a dark line in the center of the I band; the distance between Z bands delimits the sarcomeres of striated muscle.

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band,

n 1. a cord, tie, chain, or metal collar by which something is bound.
n 2. a contrasting strip or strip of material running through or along the edge of a material.

band adapter,

n See adapter, band.

band, adjustable orthodontic,

n a band provided with an adjusting screw to permit alteration in size.

band, apron,

n See apron band.

band, orthodontic,

n a thin metal ring, usually stainless steel, that secures orthodontic attachments to a tooth. The band, with orthodontic attachments welded or soldered to it, is closely adapted to fit the contours of the tooth and then is cemented into place.

band, pusher,

n an instrument used to adapt the metal band to the tooth.

band remover,

n an instrument used to remove bands from the teeth.

band, rubber,

n See elastic.

band, slip,

n a band formed when a metal is placed under a load and one grain tends to slip or slide on another.

band, striated

n See muscle, striations.