J. Orthod.
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British Journal of Orthodontics, Vol 15, 199-203, Copyright © 1988 by British Orthodontic Society


ARTICLES

Incidence of lower second permanent molar impaction

R Evans
Bristol Dental Hospital.

The incidence of lower second molar impaction was investigated, comparing the records of two samples of 200 orthodontic patients referred consecutively, in 1976 and 1986. A further study compared 50 cases showing both bilateral and unilateral impactions, with a non- impacted control group. This allowed possible causes of the impactions to be examined, particularly concerning the effect of premature loss of deciduous teeth on the distribution of crowding.





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Copyright © 1988 British Orthodontic Society.