Abfraction

Abfraction

Abfraction is the loss of tooth structure from flexural forces. This has not been supported yet by dental research but it is hypothesized that enamel, especially at the cementoenamel junction (CEJ), undergo this pattern of destruction by separating the enamel rods.

As teeth flex under pressure, the arrangement of teeth touching each other, known as occlusion, causes tension on one side of the tooth and compression on the other side of the tooth. This is believed to cause V-shaped depressions on the side under tension and C-shaped depressions on the side under compression.

This theory does not fully satisfy many researchers because there are many teeth whose occlusion causes tension and compression on either side. Consequently, it would be expected that many more teeth would show signs of abfraction, but this is not the case. Research is ongoing to identify the role abfraction has on this pattern of tooth destruction.

ee also

*Attrition
*Erosion
*Abrasion
*Bruxism

References

* [http://www.thejcdp.com/issue001/gandara/introgan.htm The Journal of Contemporary Dental Practice]
*Summit, James B., J. William Robbins, and Richard S. Schwartz. "Fundamentals of Operative Dentistry: A Contemporary Approach." 2nd edition. Carol Stream, Illinois, Quintessence Publishing Co, Inc, 2001. ISBN 0-86715-382-2.


Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • abfraction — ab·frac·tion ab frak shən n a mechanism that is postulated to explain loss of tooth enamel and dentin in cervical areas of teeth exposed to similar amounts of brushing, general erosion, or abrasion compared to unaffected teeth but to considerably …   Medical dictionary

  • Tooth — Infobox Anatomy Name = Teeth Caption = An adult human s teeth. Caption2 = CGI posterior view of teeth taken from inside of mouthTeeth (singular, Tooth) are small whitish structures found in the jaws (or mouths) of many vertebrates that are used… …   Wikipedia

  • Bruxism — Infobox Disease Name = PAGENAME Caption = DiseasesDB = 29661 ICD10 = ICD9 = ICDO = OMIM = MedlinePlus = 001413 eMedicineSubj = eMedicineTopic = MeshID = Bruxism (from the Greek βρυγμός (brugmós), gnashing of teeth ) is the grinding of the teeth,… …   Wikipedia

  • Tooth enamel — Labeled molar Latin enamelum Code TA …   Wikipedia

  • Abrasion (dental) — Abrasion is the loss of tooth structure by mechanical forces from a foreign element. If this force begins at the cementoenamel junction, then progression of tooth loss can be rapid since enamel is very thin in this region of the tooth. Once past… …   Wikipedia

  • Erosion (dental) — Erosion, otherwise known as acid erosion, is the loss of tooth structure due to chemical dissolution by acids not of bacterial origin. Dental erosion is the most common chronic disease of children ages 5 ndash;17. [Citation last = U.S. Department …   Wikipedia

  • Attrition (dental) — Attrition is the loss of tooth structure by mechanical forces from opposing teeth. Attrition initially affects the enamel and, if unchecked, may proceed to the underlying dentin. Once past the enamel, attrition quickly destroys the softer… …   Wikipedia

  • Email dentaire — Émail dentaire Pour les articles homonymes, voir émail. enamel = émail cementum = cément L émail est la partie externe de la couronne des …   Wikipédia en Français

  • Hypersensibilite dentinaire — Hypersensibilité dentinaire Sommaire 1 Définition 2 Prévalence 3 Diagnostic clinique 4 Diagnostic différentiel 5 …   Wikipédia en Français

  • Hypersensibilité Dentinaire — Sommaire 1 Définition 2 Prévalence 3 Diagnostic clinique 4 Diagnostic différentiel 5 …   Wikipédia en Français

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”