2016 Glossary - 39
aw n: either of 2 bony structures (maxilla or
mandible) that are intended to bear natural
teeth or support prosthetic teeth.
jaw malposition n: abnormal or anomalous
position of the mandible.
jaw relation n: any relationship of the mandible to its
joint n: where 2 or more skeletal bones meet (intersect); functions to allow the movement of the individual bones. See also temporomandibular joint.
junction n: the process of joining together, as in 2 different structures.
* cementodentinal junction: the zone where the
dentin and cementum meet.
* cementoenamel junction: the zone where the
cementum and enamel meet at the cervical section of the tooth.
* dentinoenamel junction: the zone where the
dentin and enamel meet.
* mucogingival junction: the zone where the gingiva and alveolar mucosa meet.
junctional epithelium n: found at the base of the
gingival sulcus, it is a single layer or multiple layers
of nonkeratinized epithelial cells that adhere to the
tooth surface at this location. A calibrated periodontal probe is used to measure the depth of this gingival sulcus. Also known as epithelial attachment.
juvenile periodontitis n: a deteriorating periodontal
disease found in adolescents in which the periodontal damage is greater than what would normally
be expected when considering the localized irritating factors found on adjacent teeth; inflammatory
changes become excessive leading to observed
bone loss, tooth migration, and/or extrusion. See
also periodontitis and the subcategory aggressive
juxtaposition n: 2 things placed side by side or in close
eeper n: a device used for holding something
in a desired position. In dentistry, this is typically understood to mean a magnetized alloy fixed to 1 component of a restoration to
which a magnet may adhere.
Kennedy classification of removable partial dentures n: the most widely accepted and used classification system for removable partial dentures. Kennedy classification is based on the location of the
* Class I: characterized by bilateral edentulism located distal to the remaining natural teeth.
* Class II: characterized by unilateral edentulism
distal to the remaining natural teeth.
* Class III: characterized by unilateral edentulism
when natural teeth are located both mesially and
distally to the edentulous area.
* Class IV: observed when the edentulism is located mesially to the natural teeth.
keratinized gingiva n: the portion of the gingiva extending from the mucogingival junction to the gingival margin.
keratocyst n: a cutaneous cyst that is similar to an epidermoid cysts but is not limited to a specified location on the body. They are frequently reported in
persons with nevoid basal cell carcinoma syndrome.
keratosis n: a horny, keratinous growth, particularly on
the skin. Also known as a wart or callus.
keyway n: an interlock connection that uses a matrix
and patrix between the units of a fixed dental prosthesis. Once it is soldered in place it holds the pontic
in its proper relationship to the edentulous ridge and
the opposing teeth and reinforces the connector.
abial adj: of or relating to the lip.
labial flange n: the ridge, edge, or projection
of a denture that is positioned toward the vestibule located on the lip side of the mouth.
labial vestibule n: the segment of the oral cavity that
is anterior to the bicuspids and lies between the lips
and the adjacent teeth or the corresponding edentulous residual ridge.