ridge

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ridge

 [rij]
a linear projection or projecting structure; a crest.
alveolar ridge a bony ridge of the maxilla or mandible, the part of the alveolar process that contains the alveoli; called also alveolar crest.
dental ridge any linear elevation on the crown of a tooth.
Dental ridges in a maxillary molar. From Dorland's, 2000.
dermal r's ridges of the skin produced by the projecting papillae of the corium on the palm of the hand and sole of the foot, producing a fingerprint and footprint characteristic of the individual; called also cristae cutis.
genital ridge the more medial part of the urogenital ridge, giving rise to the gonad.
healing ridge an indurated ridge that normally forms deep to the skin along the length of a healing wound.
incisal ridge the part of the crown of an anterior tooth that makes up the actual incisal portion; see incisal surface, under surface.
interureteric ridge a fold on mucous membrane extending across the bladder between the ureteric orifices.
mammary ridge an ectodermal thickening in early embryos, along which the mammary glands subsequently develop.
mesonephric ridge the more lateral portion of the urogenital ridge, giving rise to the mesonephros.
oblique ridge a variable linear elevation obliquely crossing the occlusive surface of a maxillary molar.
urogenital ridge a longitudinal ridge in the embryo, lateral to the mesentery.

ridge

(rij), [TA]
1. A linear elevation, usually rough.
See also: crest.
2. dentistry any linear elevation on the surface of a tooth.
3. The remainder of the alveolar process and its soft tissue covering after the teeth are removed.
[A. S. hyrcg, back, spine]

ridge

(rĭj)
n.
A long, narrow, or crested part of the body: the ridge of the nose.

ridge

(rij) [TA]
1. A linear elevation.
See also: crest
2. dentistry Any linear elevation on the surface of a tooth.
3. The remainder of the alveolar process and its soft tissue covering after the teeth are removed.
[A. S. hyrcg, back, spine]

ridge

(rij) [TA]
1. Linear elevation, usually rough.
See also: crest
2. In dentistry, any linear elevation on tooth surface.
3. Remainder of alveolar process and its soft tissue covering after teeth are removed.
[A. S. hyrcg, back, spine]

Patient discussion about ridge

Q. what causes ridges in fingernails center of nail is splitting down the middle toward the nail bed.

A. Vertical ridges that appear on the nail can indicate disorders as simple as iron deficiency, poor absorption of vitamins and nutrients, overall poor health or they could indicate something as serious as kidney trouble.
it might be wise to get a blood test.

More discussions about ridge