Inclusion Criteria:  For Donors:  Free of infections such as HIV, hepatitis B and C, and syphilis before and 6 months after the cesarean section Volunteers over the age of 18  For Recipients:  • Medication-related osteonecrosis of the jaw cases with stage-2 diagnosis  Exclusion Criteria:  For Donors:  Any infection described above. Mentally retarded individuals  For Recipients:  MRONJ cases with stage-1, and stage-3 diagnosis Mentally retarded individuals