INTRODUCTION

The success of endodontic treatment depends on the eradication of microbes from the root canal system and prevention of re-infection. The root canal is shaped with hand and rotary instruments under constant irrigation to remove the necrotic tissue ,microbes/ bio films , and other debris from the root-canal space¹.It is impossible to create a sterile space in infected root canals with mechanical preparation alone because of complexity of root canal system^2-4.Pulpal tissue remnants and inorganic debris remain even in well- shaped canals, especially in those areas in which the instruments do not come in contact with the canal wall⁵.

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Dr Ruby

Consultant Endodontist