Tooth impaction


Tooth impaction

Impacted and embedded teeth are the two main types of unerupted teeth found in the mouth, and can sometimes be confused with each other. In both cases, the teeth remain below the surface of the gum and ,often, bone, rather than erupting into an exposed position within the mouth; however, the reason for the failure to erupt differs. Impacted teeth result from a situation in which an unerupted tooth is wedged against another tooth or teeth or otherwise directed so that it cannot erupt normally. In contrast, an embedded tooth is an unerupted tooth that is covered, usually completely, with bone. The former is "physically" blocked in its path of eruption, while the latter is compromised by its lack of eruptive force often without known etiology. Certain systemic and local pathologic conditions may be associated with both (i.e., cleidocranial dystosis)..
Mandibular third molars are the most commonly found unerupted teeth, while maxillary third molars are second most common.


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  • impaction — The process or condition of being impacted. dental i. confinement of a tooth in the alveolus and prevention of its eruption into normal position. SEE ALSO: impacted tooth …   Medical dictionary

  • impaction — /im pak sheuhn/, n. 1. an act or instance of impacting. 2. the state of being impacted; close fixation. 3. Dentistry. the condition in which a tooth is impacted. [1730 40; < LL impaction (s. of impactio), equiv. to L impact(us), ptp. of impingere …   Universalium

  • impaction — noun 1. the condition of being pressed closely together and firmly fixed • Derivationally related forms: ↑impact • Hypernyms: ↑condition, ↑status 2. a disorder in which feces are impacted in the lower colon • Hypernyms: ↑disorder, ↑ …   Useful english dictionary

  • impaction — n. state of being firmly wedged in; overcrowded condition; condition in which a tooth is unable to fully erupt (Dentistry) …   English contemporary dictionary

  • impaction — /ɪmˈpækʃən/ (say im pakshuhn) noun 1. the act of impacting. 2. the state of being impacted; close fixation. 3. Dentistry a tooth which has not erupted that is embedded in the jawbone …   Australian English dictionary

  • Wisdom tooth — A wisdom tooth, in humans, is any of the usually four third molars. Wisdom teeth usually appear between the ages of 17 and 25.[1] Most adults have four wisdom teeth, but it is possible to have more, in which case they are called supernumerary… …   Wikipedia

  • impacted tooth — noun a disorder in which a tooth is so crowded in its socket that it cannot erupt normally • Syn: ↑impaction • Hypernyms: ↑disorder, ↑upset * * * impacted tooth noun A tooth, esp a wisdom tooth, wedged between the jawbone and another tooth and… …   Useful english dictionary

  • Dental impaction — Teeth pressing together. For example, molar teeth (the large teeth in the back of the jaw) can be impacted, cause pain and require pain medication, antibiotics, and surgical removal. * * * the blocking of a tooth by a physical barrier, usually… …   Medical dictionary


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