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A projection. Usually refers to the most coronal portion of an edentulous ridge. An elevated, irregular ridge. A long raised part on a bone. An apex that is stretched laterally to form a line, often wavy or wrinkled, used in various ways for plant parts—for example, crested cacti are plants with aberrant growing points that…

A crackling or grating noise in a joint during movement. The harsh noise generated when fractured bone ends rub against each other, the sound produced when the parched, inflamed surfaces of the pleura come into contact during respiration in pleurisy cases, and when air-filled tissues are compressed. This sound is reminiscent of footsteps on a…

A snapping or grating noise and/or sensation in a joint during movement; related to the temporomandibular joint, a crackling sound made when one opens and closes the jaw; the noise made when the ends of fractured bone rub together. Crackling sound, such as that produced by the grating of ends of a broken bone. A…

Property of a material, usually metal, to deform or elongate under pressure that is either cyclic or constant. The time-dependent plastic deformation of a material under a static load or constant stress. In dentistry, creep may be destructive to dental amalgam restoration. In osteopathic medicine, creep is used to alter the responsiveness of tissues to…

Multiple superficial cracks or loss of surface integrity that may or may not progress into complete fractures. Minute fissures on the surface of natural or artificial teeth.  

A saucer‐shaped defect of soft tissue or bone, often seen interdentally. A circular depression with an elevated area at the periphery.  

Extraoral restoration replacing a portion of the cranium or face and retained by skin‐penetrating implants or adhesives.  

Bone taken from any of the bones surrounding the brain.  

Any of the bones surrounding the brain, comprising the paired bones (i.e., parietal and temporal) and the unpaired bones (i.e., occipital, frontal, sphenoid, and ethmoid). Also called calvarial bone. One of the bones in the skull. Osseous structure of the head including the frontal, parietal, temporal, occipital, sphenoid, ethmoid, nasal, vomer, and lacrimal bones, and…

Commercially pure titanium.