2016 Glossary - 13

clamping force n: the compressive force applied to a
bolted join by a fastener. The firmness or tightness of
the bolted joint is dependent upon maintaining the
clamping force.
Class I articulator n: see under articulator.
Class I malocclusion n: see under Angle's classification of malocclusion.
Class I removable partial denture n: see under Kennedy classification of removable partial dentures.
Class II articulator n: see under articulator.
Class II malocclusion n: see under Angle's classification of malocclusion.
Class II removable partial denture n: see under Kennedy classification of removable partial dentures.
Class II, Division I malocclusion n: see under Angle's
classification of malocclusion.
Class II, Division II malocclusion n: see under Angle's
classification of malocclusion.
Class III articulator n: see under articulator.
Class III malocclusion n: see under Angle's classification of malocclusion.
Class III removable partial denture n: see under
Kennedy classification of removable partial dentures.
Class IV articulator n: see under articulator.
Class IV removable partial denture n: see under
Kennedy classification of removable partial dentures.
clearance n: (1) a physical state in which physical masses may pass each other without interference. (2) The
gap between 2 bodies.
cleft, gingival n: a vertical opening, slit, or fissure in
the gingiva.
clench v: the habitual and persistent holding of the
jaws and teeth together under pressure. It is frequently due to nervous tension or physical effort.
clicking n: a snapping, cracking, or audible noise generated in the temporomandibular joint by excursions
of the mandible that is also detectable with palpation. Also called crepitus.

clinical crown n: the portion of a tooth that projects
above the free gingival margin.
clinometer n: a device (also called an inclinometer) for
measuring angles of elevation, slope, tilt, inclination,
or depression. The device is used to measure range
of motion in joints and for measuring angles in the
body, particularly in the pelvis, back and neck. clinometric adj; clinometry n.
closed curettage n: see under curettage
closed lock n: an internal (Type II) imbalance of the
temporomandibular joint in which the condyle is
blocked from sliding under the anteriorly and medially displaced articular disk.
closed reduction of a fracture n: repositioning of
bone fragments through manipulation only, that is,
without surgical intervention.
closest speaking space n: the interdental clearance
provided by the maxillary and mandibular incisor
teeth during speaking jaw motion while pronouncing fricatives and sibilants.
clutch coll n: a device affixed to the maxillary and mandibular arches to support components that record
mandibular movement.
coadapted v: in dentistry, the proper realignment of
displaced parts back to their original position, as in
the fractured incisal edge of a central incisor that
may be coadapted and bonded back to its original
position.
coaptation n: proper alignment of the displaced edges
of a wound or the ends of a fractured bone.
col n: taken from a geography term meaning the pass
or depression between 2 mountains; in dentistry it refers to the gingival depression between the
teeth that connects the facial and lingual papillae.
It follows the shape of the interproximal contact in
healthy gingiva.
collagen fiber n: see under fiber.
collagenase n: a metalloproteinase that catalyzes the
breakdown of collagen, a key component of the extracellular matrix. It is also responsible for the cleavage of procollagen, which is secreted by the cell during the normal process of collagen production.
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