Overeruption

In dentistry, overeruption is the physiological movement of a tooth lacking an opposing partner in the dental occlusion. Because of the lack of opposing force and the natural eruptive potential of the tooth there is a tendency for the tooth to erupt out of the line of the occlusion.

Etymology

The physiological movement of a tooth lacking an opposing partner in the dental occlusion is termed overeruption, hypereruption, supraeruption, supereruption or continuous eruption.[1]

Pathophysiology

Because of the lack of opposing force and the natural eruptive potential of the tooth there is a tendency for the tooth to erupt out of the line of the occlusion.

Not all teeth lacking an opposing tooth overerupt, even in long term.[2] Unopposed upper jaw molars overerupt more than the unopposed lower jaw molars.[3][4] It is more severe in young people and periodontically affected people.[5] The changes are most visible in the first year after the loss of the opposing tooth.[6]

Treatment

A systematic review on the treatment need for back jaw spaces without any teeth found that overeruption was limited to 2 mm for most studies reviewed. The authors of the review also noted the low quality of evidence and concluded that tooth replacement is not recommended as the chief therapy.[5]

Overeruption can cause interferences in the occlusion and difficulty when constructing dentures. The alveolar bone typically overgrows, but root surfaces can be exposed to the oral environment increasing likelihood of dental caries. Overerupted teeth are often sharp due to lack of tooth wear (dental attrition) by adjacent teeth during chewing.

Overeruption is treated either by forcing the tooth back using orthodontic techniques, or by cutting the interfering part of the tooth and installing a crown.

See also

References
  1. Livas, Christos; Halazonetis, Demetrios J.; Booij, Johan W.; Katsaros, Christos; Ren, Yijin (2016-01-21). "Does fixed retention prevent overeruption of unopposed mandibular second molars in maxillary first molar extraction cases?". Progress in Orthodontics. 17. doi:10.1186/s40510-016-0119-z. ISSN 1723-7785. PMC 4722044. PMID 26798065.
  2. Kiliaridis, S.; Lyka, I.; Friede, H.; Carlsson, G. E.; Ahlqwist, M. (November 2000). "Vertical position, rotation, and tipping of molars without antagonists". The International Journal of Prosthodontics. 13 (6): 480–486. ISSN 0893-2174. PMID 11203673.
  3. Lindskog-Stokland, B.; Hansen, K.; Tomasi, C.; Hakeberg, M.; Wennström, J. L. (February 2012). "Changes in molar position associated with missing opposed and/or adjacent tooth: a 12-year study in women: CHANGES IN MOLAR POSITION". Journal of Oral Rehabilitation. 39 (2): 136–143. doi:10.1111/j.1365-2842.2011.02252.x. PMID 21902708.
  4. Craddock, Helen L.; Youngson, Callum C.; Manogue, Michael; Blance, Andrew (November 2007). "Occlusal Changes Following Posterior Tooth Loss in Adults. Part 1: A Study of Clinical Parameters Associated with the Extent and Type of Supraeruption in Unopposed Posterior Teeth". Journal of Prosthodontics. 16 (6): 485–494. doi:10.1111/j.1532-849X.2007.00212.x. ISSN 1059-941X. PMID 17559530.
  5. Faggion, Clovis Mariano; Giannakopoulos, Nikolaos Nikitas; Listl, Stefan (February 2011). "How strong is the evidence for the need to restore posterior bounded edentulous spaces in adults? Grading the quality of evidence and the strength of recommendations". Journal of Dentistry. 39 (2): 108–116. doi:10.1016/j.jdent.2010.11.002. ISSN 1879-176X. PMID 21093527.
  6. Love, William D.; Adams, Russell L. (March 1971). "Tooth movement into edentulous areas". The Journal of Prosthetic Dentistry. 25 (3): 271–278. doi:10.1016/0022-3913(71)90188-0. PMID 5276850.
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