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306 PATHOLOGY OF THE HARD TISSUES OF THE TEETH.
Supplemental groove. A shallow long-shaped depression in the surface of a
tooth, generally with a smoothly rounded bottom. Supplemental grooves differ from
developmental grooves in that they do not mark the junction of lobes.
Supplemental lobe. A lobe that does not belong to the typical form of the
tooth ; an additional lobe.
Supplemental ridge. A ridge on the surface of a tooth that does not belong
to the typical form of the tooth; an additional ridge.
Suppuration. The act of pus formation. The formation of pus.
Temporary teeth. See Deciduous Teeth.
The bite. The power of force with which the teeth may be closed in the crush-
ing of food, is called the strength of the bite, or simply, the bite. It is measured
with the gnathodyuamometer.
Thick-necked. A tooth in which the mesio-distal diameter of the neck is nearly
equal to that of the crown. See Bell-crowned.
Note. The word neck and the Latin word cervix, the neck, have had some use in dentistry
in which cervical has been the adjective form. The word cervical was used to represent a constric-
tion, or a supposed constriction, between the crown of a tooth and its root, and, as used, its meaning
was much too vague to serve the purposes of modern dentistry. Cervical is now practically obsolete.
Thirds. Division of a crown of a tooth; as to length, into occlusal, or incisal
third, middle third and gingival third; as to mesio-distal breadth, into mesial third,
middle third, and distal third.
Tine. A tooth, a spike, as of a fork; a prong, as of an antler. (Webster.) A
slender pointed instrument; as an exploring tine.
Toilet of the cavity. Consists in freeing the internal surfaces of the cavity
from all chips or fine dust. The final cleaning of cavity walls before beginning a
filling.
Transverse ridge. A ridge formed of two triangular ridges, which join to
form a continuous ridge across the occlusal surface of a tooth.
Triangular ridge. A ridge running from the point of a cusp toward the cen-
tral portion of the occlusal surface of a tooth.
Trypsin. One of the enzymes. See Enzyme.
Tubercle. A slight rounded elevation on the surface of a tooth. Tubercles
occur frequently on the linguo-gingival ridge of the incisors, and occasionally upon
various parts of other teeth. They are deviations from the typical tooth forms.
Tubules. (PI. Tubuli.) The minute tubular canals which radiate from the pulp
chamber and canals through the dentin to the dento-enamel junction in the crown
and to the dento-cemental junction in the root of the tooth.
I'litis. A general inflammation of the gums as distinguished from gingivitus,
which is confined to the free margins of the gums and immediate neighborhood.
VISCOUS saliva. Saliva that is noticeably thick or gummy. Usually the saliva
is a very thin, watery fluid, but some persons have saliva that has so large a pro-
portion of mucus that it is thick and tenacious to a very noticeable degree. See
Ropy Saliva.
Whorls. Circular forms or segments of circular forms with the form elements
arranged somewhat after the plan of the spokes of a wheel. Or form elements
arranged around a center.
Wrinkle, n. A small ridge or prominence formed by the contraction of a smooth
surface. A wrinkled tooth is one the ordinary smooth surface of the enamel of which
i« ridged and furrowed.
Zones of injury. Said particularly of the injuries of the teeth in atrophy.
These injuries are spread in sheets or zones through certain parts of the enamel and
dentin.
Zooglea. A colony of microorganisms imbedded in a viscous gelatinous sub
•tanee.