387 A Multidisciplinary Approach to the Sequelae of Dental Trauma in a Child: A Radicular Cyst

Abstract Background A radicular cyst is an inflammatory cyst of odontogenic nature, formed by cells of Malassez in the periodontal ligament, which are stimulated and proliferate, following insults such as dental trauma. First stage treatment is commonly orthograde root canal treatment (RCT), followed by apicectomy or extraction and enucleation of the lesion +/- bone grafting and replacement tooth. Presenting problem This case illustrates the sequelae of a repeated dental trauma to a LR1 in a child, which was endodontically treated and obturated with Mineral Trioxide Aggregate (MTA). After a second dental trauma, a painful intra-oral swelling developed with mobility and tenderness of adjacent teeth. The swelling increased after extraction of the LR1, leading to enucleation by the Oral and Maxillofacial Surgery Surgeon (OMFS). Investigations Plain radiographic films, cone beam CT (CBCT) imaging revealing a radiolucent area extending from LR3 to LL3, 2 x 1.1 x 1.9cm, with buccal perforation and thinning of the lingual cortex. Clinical management Across a 6-year period restoration and orthograde RCT was completed LR1. A second dental trauma 4 years later necessitated extraction of LR1. Subsequent acute swelling and pain lead to further radiological assessment which was consistent with a giant cell lesion. Following enucleation, histopathology confirmed a radicular cyst, with pulse granuloma and reactive changes. Bony infill was noted and the LR1 was replaced with a resin-retained bridge. Discussion This case aims to raise awareness of the sequelae of dental trauma in children and the multidisciplinary approach to their care.