irregular dentin - ορισμός. Τι είναι το irregular dentin
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Τι (ποιος) είναι irregular dentin - ορισμός

LOSS OF TOOTH SUBSTANCE BY MECHANICAL CONTACT WITH OBJECTS OTHER THAN TOOTH-TOOTH CONTACT
Relative dentin abrasivity; Tooth abrasion; Relative dentin abrasion; Radiotracer dentin abrasion; Radioactive dentin abrasion
  • Abrasion occurring on the cervical margins from the effects of friction from toothbrushing and abrasive toothpastes

Irregular moon         
  • Callisto}}
  • Distant ''Cassini'' image of Himalia
  • Phoebe]], Saturn's largest irregular satellite
  • KBOs]].
  • The orbits of Jupiter's irregular satellites, showing how they cluster into groups. Satellites are represented by circles that indicate their relative sizes. An object's position on the horizontal axis shows its distance from Jupiter. Its position on the vertical axis indicates its [[orbital inclination]]. The yellow lines indicate its [[orbital eccentricity]]  (i.e. the extent to which its distance from Jupiter varies during its orbit).
  • Irregular satellites of Uranus (green) and Neptune (blue) (excluding Triton). For explanation, see Jupiter diagram
  • Irregular satellites of Saturn, showing how they cluster into groups. For explanation, see Jupiter diagram
  • The power law for the size distribution of objects in the Kuiper belt, where ''q'' ≈ 4 and thus N ~ D<sup>−3</sup>. That is, for every Kuiper belt object of a particular size, there are approximately 8 times as many objects half that size and a thousands times as many objects one-tenth that size.
NATURAL SATELLITE FOLLOWING A DISTANT, INCLINED, AND OFTEN ECCENTRIC AND RETROGRADE ORBIT
Irregular satellites; Irregular natural satellites; Irregular moons; Irregular natural satellite; Irregular satellite
In astronomy, an irregular moon, irregular satellite or irregular natural satellite is a natural satellite following a distant, inclined, and often eccentric and retrograde orbit. They have been captured by their parent planet, unlike regular satellites, which formed in orbit around them.
Irregular chess opening         
IMPRECISE TERM FOR AN INFREQUENTLY USED CHESS OPENING
A00 (chess opening); Irregular openings (chess); Irregular openings; ECO A00; Irregular chess openings; Irregular opening; Unorthodox opening; Unorthodox chess openings; Unorthodox chess opening; Irregular Chess Openings
In chess, irregular opening is a traditional term for any opening considered unusual or unorthodox. In the early 19th century it was used for any opening not beginning with 1.
English irregular verbs         
VERBS WITH LESS COMMON CONJUGATIONS IN ENGLISH
Irregular verbs in English; Irregular English verbs
The English language has many irregular verbs, approaching 200 in normal use—and significantly more if prefixed forms are counted. In most cases, the irregularity concerns the past tense (also called preterite) or the past participle.

Βικιπαίδεια

Abrasion (dental)

Abrasion is the non-carious, mechanical wear of tooth from interaction with objects other than tooth-tooth contact. It most commonly affects the premolars and canines, usually along the cervical margins. Based on clinical surveys, studies have shown that abrasion is the most common but not the sole aetiological factor for development of non-carious cervical lesions (NCCL) and is most frequently caused by incorrect toothbrushing technique.

Abrasion frequently presents at the cemento-enamel junction and can be caused by many contributing factors, all with the ability to affect the tooth surface in varying degrees.

The appearance may vary depending on the cause of abrasion, however most commonly presents in a V-shaped caused by excessive lateral pressure whilst tooth-brushing. The surface is shiny rather than carious, and sometimes the ridge is deep enough to see the pulp chamber within the tooth itself.

Non-carious cervical loss due to abrasion may lead to consequences and symptoms such as increased tooth sensitivity to hot and cold, increased plaque trapping which will result in caries and periodontal disease, and difficulty of dental appliances such as retainers or dentures engaging the tooth. It may also be aesthetically unpleasant to some people.

For successful treatment of abrasion, the cause first needs to be identified and ceased (e.g. overzealous brushing). Once this has occurred, subsequent treatment may involve the changes in oral hygiene, application of fluoride to reduce sensitivity, or the placement of a restoration to help prevent further loss of tooth structure and aid plaque control.