Removal of the cystic lesion following the apical resection of 1.3.
Retropreparation of about 3 mm with US tip and obturation was performed with Putty Fast bioceramic cement. At the follow-up, after only 3 months, the patient was asymptomatic, the fistula disappeared, and bone regeneration was observed without any grafting procedure. For a complete healing it will take about 1 year.
