Category: C
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Commissure splint
A device placed between the lips that helps increase the separation between them. 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.
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Commissure
A meeting point or junction between two anatomic structures, such as the corners of the mouth. The place of joining (e.g. the faces of joining carpels). Bundle of nerve fibers passing from one side to the other side of the brain or spinal cord. A structure which joins two similar tissues, e.g. a group of…
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Comminuted fracture
A complex bone fracture characterized by breaks in several places in the same area, crushed and/or splintered. A fracture where the bone is broken in several places. A fracture in which the bone is broken into more than two pieces. A crushing force is usually responsible and there is often extensive injury to surrounding soft…
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Comminute
The reduction of food into small parts, comminution. To reduce to small fragments, usually by mechanical means macerate.
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Commercially pure titanium (CP‐Ti)
Biocompatible metal commonly used for dental implants. It is an alloy of approximately 99 wt.% titanium and small amounts (from 0.18 to 0.40 wt.%) of oxygen with trace amounts (less than 0.25 wt.%) of iron, carbon, hydrogen, and nitrogen. Commercially pure titanium is classified in multiple grades. The amount of oxygen determines the grade of…
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Comfort cap
Element designed to fit over a component such as the transmucosal abutment. Intended to cover the component to protect the intraoral tissues from a detectable edge and/or prevent damage to the exposed surfaces of the component.
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Combination syndrome
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 and in the edentulous posterior mandible, overgrowth of the maxillary tuberosities, and hyperplasia of the…
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Combination clasp
A clasp for a removable dental prosthesis that has a circumferential retainer comprising a wrought wire retentive clasp and a cast reciprocal (stabilizing) arm.
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Color scale
An orderly arrangement of colors showing graduated change in some attribute or attributes of color as a value scale.
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Color rendering index
A number from 1 to 100 given to a light source to indicate its relative equivalence to pure white light which has a color rendering index (CRI) of 100. The closer the number is to 100, the more it resembles pure white light.