2016 Glossary - 48
axis. Casts are arbitrarily mounted without use of a
facebow. The maximum intercuspal position is the
only reproducible position using this type of articulator. It does not allow for adjustments to duplicate
mandibular movements. See also cast relator.
nonanatomic teeth n: artificial teeth with occlusal surfaces that are not anatomically correct. These teeth
are designed in accordance with mechanical principles and are not intended for anatomic duplication.
See also zero-degree teeth.
nonarcon articulator n: an articulator with the equivalent condylar guidance compartment attached to
the lower member and the condyle equivalent hinge
axis compartment attached to the upper member.
nonfunctional side n: the side of the arch located contralaterally to the functional side, which the mandible moves away from during lateral excursive movement.
nonrigid connector n: a connector that allows a limited movement between the retainer and the pontic
components of a fixed partial denture. Its usage is indicated in cases where a single path of insertion cannot be achieved due to nonparalleled abutments.
cclude (occluded; occluding) v: (1) to close
or bring together; (2) to bring the teeth together in alignment for chewing.
occluder n: a type of articulator.
occluding jaw record n: a registration record of maximum intercuspation.
occlusal adj: pertaining to the contacting surfaces of
opposing maxillary and mandibular posterior teeth,
prostheses, or prosthetic baseplates with their associated wax rims.
occlusal adjustment n: any adjustment (reshaping,
selective grinding) to the occluding surfaces of teeth
or restorations intended to change or improve the
manner in which opposing teeth fit together as in
occlusal embrasure n: the interdental space located
coronally to the contact area.
occlusal force n: force applied to opposing teeth that
results from contraction of the muscles of mastica48
tion; the force created during mastication via the action of muscles.
occlusal form n: the shape on the chewing surfaces of
a tooth or a row of teeth.
occlusal guard (bite guard, mouth guard, night guard)
n: a plastic removable dental appliance that covers
a dental arch separating opposing teeth from each
other so that teeth cannot damage each other during parafunctional activity.
occlusal pivot n: a raised area placed on the occlusal
surface of a tooth (usually on a molar) that acts as a
fulcrum and limits mandibular full closure, thereby
inducing rotation of the lower jaw.
occlusal plane n: (1) an imaginary plane formed by the
incisal edges of the anterior teeth and the occlusal
cusps of the posterior teeth. The plane represents
the curvature formed by these edges. (2) The surface
of wax occlusal rims used for removable partial and
complete dentures that simulates the incisal edges
of the anterior teeth and the occlusal cusps of the
posterior teeth. (3) A flat or curved guide for making
dental prostheses that is used to position the incisal
edges of the anterior teeth and the occlusal cusps of
the posterior teeth.
occlusal pressure n: force applied to the occlusal surfaces of teeth.
occlusal reduction n: the amount (in millimeters) of
tooth structure removed from the occlusal surface of
teeth in order to provide adequate interdental space
for a restorative material.
occlusal reshaping n: the act of physical recontouring
the occlusal surfaces of teeth.
occlusal surface n: the anatomic masticatory surfaces
of posterior teeth as outlined by the mesial and distal marginal ridges and the buccal and lingual cusp
occlusal vertical dimension n: a vertical measurement of the relationship of the maxilla and mandible
when the existing teeth are in maximum intercuspation. See also vertical dimension.
occlusal wear n: the loss of tooth structure caused by
attrition or abrasion due to functional and parafunctional contact of opposing teeth.