Category: C
-
Cryotherapy
Extraorally, the postsurgical application of cold dressings to reduce inflammation and pain. Intraorally, the freezing of tissue with a cold device. The topical application of ice. The removal of unwanted tissue by freezing. Skin tags, for example, might be surgically removed by a dermatologist applying frozen liquid nitrogen. Also called cryosurgery. Use of cold to…
-
Cryosurgery
Destruction of tissue by extreme cold. Usually achieved with liquid nitrogen or carbon dioxide. Destruction of diseased or unwanted tissues by freezing. Surgery which uses extremely cold instruments to destroy tissue. Use of extreme cold (e.g., liquid nitrogen) to destroy unwanted tissue (e.g., warts, cataracts, skin cancer). The cooling agent is applied by means of…
-
Crown‐root ratio
The ratio determined by measuring the total height of the tooth above alveolar bone compared with the height of the tooth’s root within alveolar bone; it is typically evaluated by radiograph.
-
Crown‐implant ratio
The ratio determined by measuring the total height of the restoration and implant.
-
Crown lengthening
A surgical procedure designed to increase the extent of supragingival tooth structure, primarily for restorative purposes, by apically positioning the gingival margins with or without the removal of supporting bone. A periodontal procedure often performed for esthetic purposes in which excessive gum tissue is surgically removed in order to expose more of the surface of…
-
Crown height space (CHS)
Distance from the crest of bone to the plane of occlusion in the posterior region and to the incisal edge of the same arch in the anterior region, available for a prosthesis.
-
Crown exposure
This procedure is used in an otherwise periodontally healthy area to remove enlarged gingival tissue to provide an anatomically correct gingival relationship with the anatomic crowns. In some instances, removal of supporting bone (ostectomy) may be required.
-
Crown
Highest part of an object, such as with the normally exposed part of a natural tooth covered by enamel, or an artificial restoration replacing part or all of the coronal portion of a tooth or implant abutment for esthetic and functional purposes. To place on the head, as to place a crown on a tooth,…
-
Crowding
Discrepancy between tooth sizes and arch length and/or tooth positioning that results in malalignment and abnormal contact relationships between teeth. A stress-related psychological state that may be produced by a perceived high-population density.
-
Cross‐sectional study
A type of study that involves the observation of a defined population at a single point in time or time interval.