2016 Glossary - 4

anneal v: to heat a material followed by cooling in a
controlled fashion to improve the material's physical
properties. The process results in (1) degassing; (2)
removal of internal stresses providing the required
amount of toughness, temper, or softness; and (3)
driving impurities from the surface of the material.
anodontia n: the congenital absence of deciduous
(primary) and succedaneous (permanent) teeth.
antagonist tooth n: a tooth in the opposing jaw that
articulates with the subject tooth in centric and/or
eccentric movement.
anterior guidance n: how the lingual surfaces of the
maxillary anterior teeth affect the excursive movements of the mandible when in contact with the incisal edges of the mandibular anterior teeth.
anterior guide pin n: the rigid part of an articulator
that is attached to one member and contacts the anterior guide table found on the opposing member.
It is used to (1) establish the predetermined vertical
dimension, (2) prevent wear and fracture of mounted
cast's teeth, and (3) provide guidance (in conjunction
with the guide table and condylar elements of the
articulator) for the horizontal movements of the articulators' separate members.
anterior guide table n: a flat adjustable device in one
member of the dental articulator that receives the
guide pin of the other member and establishes a
base for recreating anterior guidance.
anterior nasal spine n: an anatomic landmark that is
a sharp protruding bone formed by the frontward
prolongation of the left and right segments of the
maxillae. It is adjacent to the inferior border of the
anterior orifice of the nose.
anterior open occlusion n: an absence of contact of
opposing anterior teeth or their substitutes in any
jaw positions.
anterior programming device n: a custom-made
device placed between the opposing anterior teeth
to separate them and eliminate their influence on
the naturally programmed jaw muscles with the intent of deprogramming the muscles and, therefore,
changing the habitual jaw position to a more physiological position.
4

anterior protected articulation n: an occlusal scheme
where the anterior teeth are in contact in all lateral
and protrusive excursive jaw movements while the
posterior teeth contact only in the static position of
centric occlusion.
anteroposterior curve n: an imaginary line passed
through the functional cusps tips of the posterior
teeth to the tip of the cuspid tooth on the ipsilateral
side that forms an approximate curve.
Ante's Law n: eponymous (Irwin H. Ante) term that
postulates that the in-bone root surface of the supporting teeth for a fixed partial denture should be
equal to or greater than the in-bone surface area of
the missing tooth or teeth being replaced. Additionally, the in-bone root surface of a removable partial
denture abutment tooth or teeth plus the mucosal
area of the supporting soft tissue should equal the
in-bone surface area of the teeth being replaced.
anti-rotation n: a feature in implant design that prevents rotation of fastened parts. This feature may be
found within the implant body and within prosthetic
components.
antrum n: an anatomic cavity within bone, such as the
maxilla.
apertognathia n: an occlusal relationship where opposing teeth are not in contact (ie, an anterior open
bite).
apical abscess n: a localized collection of pus and inflamed tissue located at or around the apical end of
a tooth.
apical curettage n: see under curettage
apicoectomy n: intentional surgical excision of the apical end of a tooth root.
arc of closure n: an elliptical or circular arc representing the mandibular path of closure.
arcon n: term derived from the words "articulator" and
"condyle" describing a type of articulator that simulates temporomandibular anatomy.
arch bar n: a rigid bar or wire used to stabilize teeth
and implants and used for intra-arch fixation in the
treatment of fractures of the maxilla or mandible.
arch form n: the outline of the dental arch as viewed
from a horizontal plane (ie, ovoid, square, or tapered).



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