A patient came to the office complaining of pain and inflammation of the gums in the upper region. On clinical examination, edema with a floating point was observed in the apical gingival region of tooth 11, in addition to positive palpation and percussion. Radiographic examination revealed total obliteration of the pulp chamber. It was decided then, as an urgent measure, to drain and maintain the drain until the patient underwent tomography exams and intraoral scanning to make an access guide.