439 - Clinical Challenges in Diagnosing Tooth Eruption Failure: A Case Report

Abstract:
Posterior open bite can result from several conditions, including primary failure of eruption (PFE) and mechanical failure of eruption (MFE). PFE is a rare eruption disorder characterized by the inability of teeth to erupt in the absence of mechanical obstruction or ankylosis and is often associated with genetic factors. In contrast, MFE presents similarly but is caused by mechanical obstruction or ankylosis. Accurate diagnosis is essential to guide appropriate management and prevent ineffective orthodontic intervention or unfavorable outcomes.

This presentation discusses a 14-year-old female who presented for comprehensive exam. The patient had an unremarkable medical history and was not on any medications. Clinical examination revealed a right, unilateral posterior open bite due to unerupted posterior teeth. Radiographic evaluation demonstrated a possible retained primary maxillary molar, a supernumerary tooth, and mandibular bone sclerosis. The differential diagnosis includes both MFE and PFE. This report will review clinical and radiographic findings, and management for MFE and PFE.

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