The aim of the study is to evaluate effectiveness of cinnamon extract versus sodium hypochlorite as root canal irrigant for in pulpectomy of primary teeth in reduction of bacterial count .
Aged 4 to 8, in good general health, and medically free.
Cooperative patients who will comply to dental treatment .
Parents provided with written informed consent.
No previous history of antibiotics administration or last dose was taken from at least 2 weeks.
Children with medical, physical, or mental conditions.
Severly Uncooperative children .
Primary molars with any congenital anomalies.
Teeth with un-restorable crowns .