From Volume 43, Issue 5, June 2016 | Pages 482-486
This report describes the prosthetic management of a 15-year-old patient with an infra-occluded first permanent molar due to primary failure of eruption (secondary retention). An indirect composite onlay restoration was used to stimulate the periodontal fibres, improve function and restore occlusal stability. This paper describes the clinical technique involved.
Several terms can be used to describe a tooth with arrested eruption and an abnormal position below the occlusal plane, such as infra-occlusion or submergence.
Generalized arrested or delayed dental eruption is usually related to a syndrome or systemic condition (Table 1). On occasion, one permanent molar tooth may have arrested or delayed eruption, which is not associated with a syndrome or systemic condition. There is a prevalence of 0.01% in first permanent molars, and 0.06% in second permanent molars.1 For diagnostic purposes, affected teeth can be classified (Table 2) as:
Primary failure of eruption (PFE) is defined as non-syndromic eruption failure of permanent teeth in the absence of mechanical obstructions. This condition demonstrates some or all of the features listed below, as described by Proffit and Vig:4
As PFE incorporates features of both primary and secondary retention, it suggests that this condition may have two separate mechanisms or two manifestations of the same mechanism.5
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