| OD | Doctor of Optometry; obtained absorbance; occipital dysplasia; occupational dermatitis; occupational... |
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| ol | left eye [Lat. oculus laevus] |
| OS | left eye [Lat. oculus sinister]; occipitosacral; occupational safety; office surgery; Omenn syndrome... |
| PAIN | pyoderma gangrenosum, aphthous stomatitis, inflammatory eye disease, erythema nodosum [disorders ass... |
| PETT | pendular eye-tracking test; positron emission transverse tomography |
| multicuspid tooth | A tooth having a somewhat quadrangular crown with four or five cusps on the grinding surface; the root is bifid in the lower jaw, but there are three conical roots in the upper jaw; there are six molars in each jaw, three on either side behind the premolars in the permanent dentition; in the deciduous dentition there are but four molars in each jaw, two on either side behind the canines. Synonym: dens molaris, cheek tooth, molar, multicuspid tooth. (05 Mar 2000) |
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| contact surface of tooth | The surface of a tooth that faces an adjacent tooth in the dental arch; the contact surface that is closest to the anterior midline of the dental arch is the mesial surface of a tooth; that farthest is the distal surface. Synonym: facies approximalis dentis, facies contactus dentis. (05 Mar 2000) |
| cracked tooth syndrome | <syndrome> A toothache caused by a broken tooth (tooth fracture) without associated cavity or advanced gum disease. Biting on the area of tooth fracture can cause severe sharp pains. These fractures are usually due to chewing or biting hard objects such as hard candies, pencils, nuts, etc. Sometimes, the fracture can be seen by painting a special dye on the cracked tooth. Treatment usually is to protect the tooth with a crown. However, if placing a crown does not relieve pain symptoms, a root canal procedure may be necessary. (12 Dec 1998) |
| crown of tooth | The portion of a tooth covered with enamel. Synonym: corona dentis, anatomical crown. (05 Mar 2000) |
| posterior tooth form | The distinguishing contours of the occlusal surface of the various posterior teeth. (05 Mar 2000) |
| cuspid tooth | <dentistry> A tooth having a crown of thick conical shape and a long, slightly flattened conical root; there are two canine teeth in each jaw, one on either side adjacent to the distal surface of the lateral incisors, in both the deciduous and the permanent dentition. Synonym: dens caninus, canine, cuspid tooth, cuspidate tooth, cuspid, dens angularis, dens cuspidatus, eye tooth. (05 Mar 2000) |
| cuspless tooth | A tooth devoid of cusp formation; severe abrasion of an occlusal surface; a type of artificial denture tooth. (05 Mar 2000) |
| cusp of tooth | An elevation or mound on the crown of a tooth making up a part of the occlusal surface. Synonym: cuspis dentis, cuspis coronae. (05 Mar 2000) |
| premolar tooth | A tooth usually having two tubercles or cusps on the grinding surface and a flattened root, single in the lower jaw and upper second premolar, and furrowed in the upper first premolar. There are four premolars in each jaw, two on either side between the canine and the molars; there are no premolars in the deciduous dentition. Synonym: dens premolaris, bicuspid tooth, dens bicuspidus. (05 Mar 2000) |
| primary tooth | A tooth of the first set of teeth, comprising 20 in all, that erupts between the mean ages of 6 and 28 months of life. Synonym: dens deciduus, baby tooth, deciduous dentition, dens lacteus, first dentition, milk tooth, primary dentition, primary tooth, temporary tooth. (05 Mar 2000) |
| second tooth | One of the 32 teeth belonging to the second or permanent dentition; eruption of the permanent teeth begins from the fifth to the seventh year, and is not completed until the seventeenth to the twenty-third year, when the last of the wisdom teeth appears. Synonym: dens permanens, dens succedaneus, second tooth, secondary dentition, succedaneous dentition, succedaneous tooth. (05 Mar 2000) |
| pulpless tooth | A tooth with a nonvital or necrotic pulp, or one from which the pulp has been extirpated. (05 Mar 2000) |
| natal tooth | A predeciduous supernumerary tooth present at birth. (05 Mar 2000) |
| neck of tooth | The slightly constricted part of a tooth, between the crown and the root. Synonym: cervix dentis, cervical margin of tooth, cervical zone of tooth, collum dentis, dental neck. (05 Mar 2000) |
| neonatal tooth | A tooth erupting up to 30 days after birth. (05 Mar 2000) |