2016 Glossary - 14

collateral ligaments n: in the jaw this refers to paired
ligaments that limit motion of the lower jaw within the confines of physiologic motion. Ligaments
connect bone to bone and do not stretch, so when
working collaterally they limit joint movement. One
example of collateral ligaments is in the temporomandibular joint, where they assist in the hinging
motion of the joint and prevent the head of the condyle from popping out of the joint.
color n: (1) to apply colors; (2) to produce color or color
effects; (3) to apply or combine colors to produce an
effect.
combination clasp n: a clasp for a removable dental
prosthesis that has a circumferential retainer comprising a wrought wire retentive clasp and a cast reciprocal (stabilizing) arm.
combination syndrome n: the clinical changes observed when an edentulous maxillary arch is opposed by a mandible with retained anterior teeth
that may or may not be extruded and missing posterior teeth. Over time, there is a loss of bone in the
premaxilla, loss of bone in the edentulous posterior
mandible, overgrowth of the maxillary tuberosities,
and hyperplasia of the hard palate mucosa. Also referred to as anterior hyperfunction syndrome, or Kelly syndrome.
comminuted fracture n: a complex bone fracture
characterized by breaks in several places in the same
area, crushed and/or splintered.
commissure n: a meeting point or junction between
2 anatomic structures, that is, corners of the mouth.
commissural adj
commissure splint n: a device placed between the lips
that helps increase the separation between the lips.
Such a device is often used when surgical, electrical, or chemical damage of the lips has caused contracture or restriction of the lips. Also known as a lip
splint.
compact bone n: concentrically arranged dense bone
solidly filled with inorganic salts and organic ground
substance with the presence of small spaces called
lacunae filled with osteocytes (bone cells).
14

compensating curve n: the curve created by the alignment of the occlusal and incisal surfaces of artificial
teeth that compensates for the condylar path when
the mandible moves from centric to eccentric positions and provides for a balanced occlusion. The
compensating curve corresponds to the curve of
Spee in a natural dentition.
complementary colors n: (1) two different colors that
form a neutral color when mixed together in correct
proportions; complementary colored light creates
white light upon mixture in an additive process,
and mixtures are determined by the laws of additive
color. If complementary, colorants mixed together
form gray or black, and mixtures are determined by
the laws of subtractive colorant mixtures; (2) colors
directly opposite on the color wheel. Complementary colorants form gray or black when mixed. Also
follows the laws of subtractive color.
complete arch subperiosteal implant n: an implant
that is placed in a manner such that it rests on the
osseous residual ridge and under the periosteum
and provides for abutments that support a fixed
or removable dental prosthesis over the completely edentulous ridge. Such devices are described by
how they relate to the alveolar bone, which provides
support. A subperiosteal implant can be described
as an eposteal dental implant. See also eposteal
dental implant.
complete cleft palate n: a cleft or opening that extends through the anterior portion of the alveolar
ridge as well as the primary and secondary palates.
complete crown n: a restoration, frequently made of
cast metal or a ceramic material, that covers all 5 surfaces of a tooth-the mesial, distal, occlusal, facial,
and lingual.
complete denture n: prosthesis, usually removable,
used to replace all of the dentition and related structures of the maxillary or mandiblular arch.
complete denture prosthetics n: (1) the replacement
of the natural teeth in at least one arch using manmade materials; (2) the art and science involving
methods of restoring the appearance and function
of an edentulous mouth.



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