| CCEI | Crown-Crisp Experimental Index |
|---|---|
| CH | case history; Chediak-Higashi [syndrome]; chiasma; Chinese hamster; chloral hydrate; cholesterol; Ch... |
| Cr | chromium; cranium, cranial; creatinine; crown |
| CRD | carbohydrate-recognition domain; chronic renal disease; chronic respiratory disease; child restraint... |
| CRL | cell repository line; Certified Record Librarian; complement receptor location; complement receptor ... |
| crown lengthening | Technique combining controlled eruptive tooth movement and incision of the supracrestal gingival attachment to allow for proper restoration of a destroyed or damaged crown of a tooth. Controlled eruption of the tooth is obtained using orthodontic appliances. During this eruptive phase, repeated incisions are made at the junctional epithelium of the sulcus and the supracrestal connective tissue to prevent coronal displacement of the gingiva and of the attachment apparatus. (12 Dec 1998) |
|---|---|
| crown of head | The topmost part of the head. Synonym: crown of head. (05 Mar 2000) |
| crown of tooth | The portion of a tooth covered with enamel. Synonym: corona dentis, anatomical crown. (05 Mar 2000) |
| crown of Venus | Papular lesions of secondary syphilis on the forehead near the hair margin. See: collar of Venus. (05 Mar 2000) |
| crown-rump length | In utero measurement corresponding to the sitting height (crown to rump) of the foetus. Length is considered a more accurate criterion of the age of the foetus than is the weight. The average crown-rump length of the foetus at term is 36 cm. (12 Dec 1998) |
| crown tubercle | Tubercle of cuneate nucleus, the bulbous rostral extremity of the fasciculus cuneatus corresponding to the position of the cunate nucleus, lying lateral to the clava and separated from the tuberculum cinereum on its lateral side by the posterior lateral sulcus. Synonym: tuberculum nuclei cuneati, tuberculum cuneatum, wedge-shaped tubercle. (05 Mar 2000) |
| tooth crown | The upper part of the tooth, which joins the lower part of the tooth (tooth root) at the cervix (tooth cervix) at a line called the cementoenamel junction. The entire surface of the crown is covered with enamel which is thicker at the extremity and becomes progressively thinner toward the cervix. (12 Dec 1998) |
| jacket crown | A hollow crown of acrylic resin, fused porcelain or cast gold, combinations of gold and acrylic or gold and porcelain; it fits over the prepared stump of the natural crown. (05 Mar 2000) |
| Addison's clinical planes | A series of plane's used as landmarks in thoracoabdominal topography; the trunk is divided vertically by a median plane from the upper border of the manubrium of the sternum to the pubic symphysis, by a lateral plane drawn vertically on either side through a point half way between the anterior superior iliac spine and the median plane at the interspinal plane, and by an interspinal plane passing vertically through the anterior superior iliac spine on either side; transversely the trunk is divided by a transthoracic plane passing across the thorax 3.2 cm above the lower border of the body of the sternum, by a transpyloric plane midway between the jugular notch of the sternum and the pubic symphysis, corresponding to the disc between the first and second lumbar vertebrae, and by an intertubercular plane passing through the iliac tubercles and cutting usually the fifth lumbar vertebra; the plane's formed on these lines, and also on transverse plane's cutting the upper edge of the manubrium and the upper edge of the pubic symphysis, constitute the clinical plane's of Addison. (05 Mar 2000) |
| pathology, clinical | A subspecialty of pathology which deals with the laboratory analysis of specimens of human blood and other fluids. (12 Dec 1998) |
| chemistry, clinical | The specialty of analytical chemistry applied to assays of physiologically important substances found in blood, urine, tissues, and other biological fluids for the purpose of aiding the physician in making a diagnosis or following therapy. (12 Dec 1998) |
| pharmacology, clinical | The branch of pharmacology that deals directly with the effectiveness and safety of drugs in humans. (12 Dec 1998) |
| phase I clinical trial | <pharmacology> The earliest stage clinical trial for studying an experimental drug in humans. Phase I trials are generally comparatively small and are used to determine toxicity and maximum dose. They provide an initial evaluation of a drug's safety and pharmacokinetics-how the drug is absorbed, what tissues it reaches and how long it takes to leave the body. Such studies also usually test various doses of the drug (dose-ranging) to obtain an indication of the appropriate dose to use in later studies. The patients in these trials usually have advanced disease and have already received best available chemotherapy, therefore, seeing a repose is significant partially because this means there is a lack of cross-resistance between two anti-cancer drugs. (31 Dec 1997) |
| phase II clinical trial | <pharmacology> Usually focus on the activity of the new product as a single agent in a noncomparative, open study. (31 Dec 1997) |
| phase III clinical trial | <pharmacology> An advanced stage clinical trial that should conclusively show how well a drug works as compared to other treatments. Phase III trials are large, frequently multi-institution tests. They generally compare the relative value of the new drug compared with the current standard treatment and measure whether a new drug extends survival or otherwise improves the health of patients on treatment (clinical improvement) rather than just provide surrogate marker data. These studies generally last longer and are larger than phase II trials. (31 Dec 1997) |