en دهان و دندان Oral and Maxillofacial گزارش مورد Case Report <ul> <li style="text-align: justify;">The treatment of necrotic permanent teeth with immature apices is a daunting challenge. Apexification has been traditionally used to treat immature permanent teeth with lost pulp vitality. This technique promotes the formation of an apical barrier to close the open apex so that filling materials can be confined to the root canal. The authors present a case report of the successful treatment of a traumatized tooth with an open apex that was weakened due to a long-standing infection and thin dentin walls. In this case, we first used a triple antibiotic to disinfect the canal and then placed a calcium-enriched mixture (CEM) cement plug. Follow-up evaluations were performed 15 months after treatment. The CEM-cement appears to be a valid material to obtain periradicular healing in teeth with open apices and necrotic pulps.</li> </ul> Apexification, Therapy, Dental Pulp Necrosis 39 44 http://jsurgery.bums.ac.ir/browse.php?a_code=A-10-299-2&slc_lang=en&sid=1 Maryam Dalaei Moghadam m.dalaeemoghaddam@yahoo.com 10031947532846007658 10031947532846007658 Yes Post Graduate Endodontics Student, Department of Endodontic, School of Dentistry, Zahedan University of Medical Science, Zahedan, Iran Forough Farahi m.dalaeemoghaddam@yahoo.com 10031947532846007659 10031947532846007659 No Assistant Professor, Department of Endodontic, Faculty of Dentistry, Zahedan University of Medical Science, Zahedan, Iran