Abstract
Failure of eruption (FOE) of first and second permanent molars is rare, with an estimated prevalence of 0.01% in the case of the first permanent molar and 0.06% in the case of the second.
From Volume 11, Issue 4, October 2018 | Pages 133-138
Failure of eruption (FOE) of first and second permanent molars is rare, with an estimated prevalence of 0.01% in the case of the first permanent molar and 0.06% in the case of the second.
Primary failure of eruption (PFE) is an isolated condition causing a localized failure of tooth eruption with no other identifiable local or systemic involvement. It is rare, with an estimated incidence of 0.06% with a gender ratio of 2.25:1 (F:M).2 It has been described based upon the following clinical features:3
Frazier-Bowers et al described three different forms of PFE:4
Radiographically, full root development is seen and the tooth is normally orientated in the eruption path.5 There is no evidence of any obstruction, eg overlying bone/pathology associated with the teeth which have failed to erupt. There will be evidence of bone resorption supra-coronally, giving rise to the classical ‘chimney’-like appearance6 (Figure 1) over the lower first permanent molars only. This appearance suggests a normal resorption process and deficiency of eruptive force to move the tooth along the path of eruption. Figure 2 is another example of a patient with PFE affecting the upper left first and second permanent molar teeth.
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