| Gothic arch tracing | A tracing of mandibular movements made by means of a device attached to the opposing arches; its shape resembles that of an arrowhead or a Gothic arch, and when the instrument's marking point is at the apex of the arch, the jaws are considered to be in centric relation. Synonym: arrow point tracing, Gothic arch tracing, Gothic arch, stylus tracing. (05 Mar 2000) |
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| ribbon arch | A thin, ribbon-shaped, rectangular orthodontic arch wire applied to the dental arch's so that its widest dimension is parallel to the labial or buccal surfaces of the teeth. (05 Mar 2000) |
| ribbon arch appliance | An appliance consisting of a rectangular wire inserted into a specially designed bracket attached to the labial and buccal surfaces of the teeth. (05 Mar 2000) |
| right aortic arch | <radiology> Types: mirror image branching (95% most likely to be congenital ht disease), 90% tetralogy of Fallot (TOF) (25%) ** decreased PBF, 2.5% truncus (30-50%) ** increased PBF, 1.5% transposition (TGV) (5%), aberrant left subclavian artery (5% most likely to be congenital heart disease) (12 Dec 1998) |
| groove for arch of aorta | A broad, deep sulcus arching superiorly over the hilus on the mediastinal surface of the left lung formed as a result of the aortic arch impressing or indenting the lung. (05 Mar 2000) |
| pharyngopalatine arch | One of a pair of ridges or folds of mucous membrane which passes downward from the posterior margin of the soft palate to the lateral wall of the pharynx. It encloses the palatopharyngeus muscle and forms the posterior margin of the tonsillar fossa. It also demarcates the isthmus of fauces from oropharynx. Synonym: arcus palatopharyngeus, pharyngopalatine arch, posterior palatine arch, posterior pillar of fauces. (05 Mar 2000) |
| W-arch | A fixed maxillary expansion device attached to the lingual part of the molars, with either bilateral or unilateral extension arms. (05 Mar 2000) |
| collapse of dental arch | Movement of teeth to fill a space which would normally be filled by another, missing tooth, creating a malpositioning of adjacent and opposing teeth. (05 Mar 2000) |
| plantar arch | The arterial arch formed by the lateral plantar artery running across the bases of the metatarsal bones and anastomosing with the dorsal pedis artery, either of two bony arch's of the foot, longitudinal arch or transverse arch. See: medial longitudinal arch of foot, lateral longitudinal arch of foot, transverse arch of foot. Synonym: arcus plantaris, plantar arterial arch. (05 Mar 2000) |
| plantar arterial arch | The arterial arch formed by the lateral plantar artery running across the bases of the metatarsal bones and anastomosing with the dorsal pedis artery, either of two bony arch's of the foot, longitudinal arch or transverse arch. See: medial longitudinal arch of foot, lateral longitudinal arch of foot, transverse arch of foot. Synonym: arcus plantaris, plantar arterial arch. (05 Mar 2000) |
| plantar venous arch | The arch formed by the plantar digital veins from the toes which accompanies the plantar arterial arch. Synonym: arcus venosus plantaris. (05 Mar 2000) |
| wire arch | A wire conforming to the dental arch; used to restore the normal curve to the denture. (05 Mar 2000) |
| coracoacromial arch | A protective arch formed by the smooth inferior aspect of the acromion and the coracoid process of the scapula with the coracoacromial ligament spanning between them. This osseoligamentous structure overlies the head of the humerus, preventing its upward displacement from the glenoid fossa. (05 Mar 2000) |
| Corti's arch | <anatomy> The arch formed by the junction of the heads of Corti's inner and outer pillar cells. (05 Mar 2000) |
| costal arch | That portion of the inferior aperture of the thorax formed by the articulated cartilages of the seventh to tenth (false) ribs. Synonym: arcus costalis, arcus costarum. (05 Mar 2000) |