Abstract
Buccal bifurcation cyst is an unusual inflammatory odontogenic cyst arising from the lateral periodontium of a vital tooth. A 6-year-old female admitted to the hospital with a diagnosis of bacterial pneumonia. During hospitalization, she presented with a painful intraoral swelling on the buccal gingiva of the first mandibular molar, with drainage of purulent secretion. The tooth was vital and presented a periodontal pocket at the buccal surface. Radiography and computed tomography showed a well-defined radiolucent area at the bifurcation of the tooth, with cortical expansion. Based on the clinical and radiological images, the diagnosis was buccal bifurcation cyst. Surgical enucleation was planned for after hospital discharge. However, 2 months later, there was radiographic evidence that the lesion had regressed. Therefore, the surgery was canceled. The patient has been under follow-up for 10 months, and the affected area shows bone repair.
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