Introduction: Bone regeneration in the mandible has been described in the literature after the resection because of several pathologies. This development of new bone seems to occur from the periosteum or its fragments. It is most common in the young population although it can appear in elder patients.

Case report: A 07 years old girl, visited the Pediatric Service of Oral and Maxillofacial Surgery in Florianópolis, Brazil, with necrosis in the anterior mandible after a trauma, caused by a car accident, which demanded to be resected and fixed with a reconstruction plate.

Prosthetic device was installed to recover the function of the mandible while the patient is waiting for the definitive rehabilitation with Titanium Implants.

Some months later, during the periodic visit, the Computerized Tomography showed a new bone formation in the region that still evolving and increasing the bone neoformation area. Now, we are in 06 years follow up.

Purpose: The purpose of this poster is to expose to the scientific community another case of this uncommon and unexpected regeneration, thus avoiding many unnecessary reconstruction surgeries.

Conflict of interest: None declared.