Abstract
Dental retention is a common phenomenon that affects permanent and supernumerary teeth, with an incidence ranging from 3.1% to 17%. The case of a 19-year-old patient with an impacted lower third molar and a supernumerary tooth is presented, whose eruption was guided using an orthodontic button to replace a second molar with a poor prognosis. The intervention included the fenestration of the third molar and the extraction of the affected second molar, using an L-PRF membrane to promote bone regeneration. Histopathological findings showed a Dentigerous cyst. After three years of follow-up, tooth 48 improved its position, and although the patient discontinued orthodontic treatment, her dental health remained stable. This case highlights the effectiveness of surgical and orthodontic techniques in managing impacted teeth and suggests that the controlled eruption of third molars may be a viable alternative to preserve dentition.
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Copyright (c) 2026 Araceli Chamorro, Sofía Escobar Riquelme, Francisco Escala Pérez

