Extraction of primary (baby) teeth for unerupted palatally displaced permanent canine teeth in children.

Cochrane Database Syst Rev

Department of Oral Health and Development, School of Clinical Dentistry, University of Sheffield, Claremont Crescent, Sheffield, UK, S10 2TA.

Published: April 2009

AI Article Synopsis

  • The study investigates how extracting the primary maxillary canine tooth might influence the eruption of the permanent canine tooth, which can sometimes improperly erupt into the roof of the mouth in about 1% to 3% of the population.
  • To gather data, the researchers searched various medical literature databases and selected relevant randomized controlled trials that focused on the effects of the primary canine extraction on the eruption patterns of the ectopic permanent canine.
  • The initial search yielded 324 publications, but after screening and translation, only a few trials provided data that met the criteria for inclusion in the review.

Article Abstract

Background: The permanent canine tooth in the upper (maxillary) jaw sometimes does not erupt into the mouth correctly. In about 1% to 3% of the population these teeth will be diverted into the roof of the mouth (palatally). It has been suggested that if the deciduous canine is removed at the right time this palatal eruption might be avoided.

Objectives: To evaluate the effect of extracting the primary maxillary canine on the eruption of the palatally ectopic maxillary permanent canine.

Search Strategy: We searched the Cochrane Oral Health Group's Trials Register (to April 2008); CENTRAL (The Cochrane Library 2008, Issue 3); MEDLINE (1966 to April 2008); EMBASE (1980 to April 2008). There were no language restrictions. Authors of trials were contacted for further data.

Selection Criteria: Trials were selected if they met the following criteria: a randomised or quasi-randomised controlled trial, involving the extraction of the primary maxillary canine and assessing eruption/non-eruption of the palatally displaced maxillary permanent canine.

Data Collection And Analysis: Seven review authors independently, in duplicate, examined the studies found in the search. The primary outcome was the reported prevalence of eruption or non-eruption of the ectopic permanent canine into the mouth following observation or intervention. Results were to be expressed as risk ratios for dichotomous outcomes with 95% confidence intervals and mean differences for continuous outcomes. Heterogeneity was to be investigated, including both clinical and methodological factors.

Main Results: The search identified 324 publications of which 295 were excluded after reviewing the abstract. Full articles were obtained for the remaining 31, of which 19 were non-English and required translation. Three reports of two randomised controlled trials were identified for possible inclusion in the review; however, the data in the publications were not presented in a form that could be usable and the authors have been contacted for further details.

Authors' Conclusions: There is currently no evidence to support the extraction of the deciduous maxillary canine to facilitate the eruption of the palatally ectopic maxillary permanent canine. Two randomised controlled trials were identified but unfortunately, due to deficiencies in reporting, they cannot be included in the review at the present time.

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http://dx.doi.org/10.1002/14651858.CD004621.pub2DOI Listing

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