1. Non-restorable teeth, teeth with acute or chronic apical abcess, teeth with internal/external root resorption

2. Teeth with anatomical difficulties like open apices, calcified canals, dilacerations

3. Patients that had any serious medical illness or with systemic disorders

4. Previous root canal treatment

5. Periodontally compromised teeth

6. Presence of sinus tract

Assessment of Pain Using Two Different Irrigation Systems After Root Canal Treatment