| progonoma of jaw | A benign neoplasm of neuroectodermal origin that most often involves the anterior maxilla of infants in the first year of life. It presents clinically as a rapidly growing blue-black lesion producing a destructive radiolucency; histologically, it is characterised by small round undifferentiated tumour cells interspersed with larger polyhedral melanin-producing cells arranged in an alveolar configuration. Synonym: melanoameloblastoma, pigmented ameloblastoma, pigmented epulis, progonoma of jaw, retinal anlage tumour. (05 Mar 2000) |
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| protrusive jaw relation | A jaw relation resulting from a protrusion of the mandible. (05 Mar 2000) |
| inversed jaw-winking syndrome | <syndrome> When there are supranuclear lesions of the trigeminal nerve, touching the cornea may produce a brisk movement of the mandible to the opposite side. (05 Mar 2000) |
| terminal jaw relation record | A record of the relationship of the mandible to the maxillae made at the vertical relation of occlusion and at the centric position. (05 Mar 2000) |
| jaw | 1. <anatomy> One of the bones, usually bearing teeth, which form the framework of the mouth. Hence, also, the bone itself with the teeth and covering. In the plural, the mouth. 2. Anything resembling the jaw of an animal in form or action; especially, pl, the mouth or way of entrance; as, the jaws of a pass; the jaws of darkness; the jaws of death. 3. <machinery> A notch or opening. A notched or forked part, adapted for holding an object in place; as, the jaw of a railway-car pedestal. See Axle guard. One of a pair of opposing parts which are movable towards or from each other, for grasping or crushing anything between them, as, the jaws of a vise, or the jaws of a stone-crushing machine. 4. The inner end of a boom or gaff, hollowed in a half circle so as to move freely on a mast. 5. Impudent or abusive talk. Jaw bit, a bar across the jaws of a pedestal underneath an axle box. Jaw breaker, a word difficult to pronounce. Jaw rope, a rope which holds the jaws of a gaff to the mast. Jaw tooth, a molar or grinder; a back tooth. Origin: A modification of chaw, formed under the influence of F. Joue the cheek. See Chaw, Chew. Source: Websters Dictionary (01 Mar 1998) |
| jaw abnormalities | Congenital absence of or defects in structures of the jaw. (12 Dec 1998) |
| jaw bone | The jaw bone. (27 Sep 1997) |
| jaw cysts | Saccular lesions lined with epithelium and contained within pathologically formed cavities in the jaw; also nonepithelial cysts (pseudocysts) as they apply to the jaw, e.g., traumatic or solitary cyst, static bone cavity, and aneurysmal bone cyst. True jaw cysts are classified as odontogenic or nonodontogenic. (12 Dec 1998) |
| jaw, edentulous | The total absence of teeth from either the mandible or the maxilla, but not both. Total absence of teeth from both is mouth, edentulous. Partial absence of teeth in either is jaw, edentulous, partially. (12 Dec 1998) |
| jaw, edentulous, partially | Absence of teeth from a portion of the mandible and/or maxilla. (12 Dec 1998) |
| jaw fixation techniques | The stable placement of surgically induced fractures of the mandible or maxilla through the use of elastics, wire ligatures, arch bars, or other splints. It is used often in the cosmetic surgery of retrognathism and prognathism. (12 Dec 1998) |
| jaw fractures | Fractures of the upper or lower jaw. (12 Dec 1998) |
| jaw jerk | A spasmodic contraction of the temporal muscles following a downward tap on the loosely hanging mandible. Synonym: chin jerk, chin reflex, jaw jerk, mandibular reflex, masseter reflex. (05 Mar 2000) |
| jaw joint | <anatomy, dentistry> The joint that connects the lower jaw to the skull. (12 Jan 1998) |
| jaw neoplasms | Cancers or tumours of the maxilla or mandible unspecified. For neoplasms of the maxilla, maxillary neoplasms is available and of the mandible, mandibular neoplasms is available. (12 Dec 1998) |