Clinical Trial The aim of this clinical study was to evaluate the effect of different root canal sealers on post operative pain after a single session endodontic retreatment of the teeth have single root and canal with chronic apical periodontitis.

The main questions aimed to be answered are:

Which of the patients treated with AHplus, Sureseal and Sealapex root canal sealers had more postoperative pain after endodontic retreatment?

Which of the patients that treated with AHplus, Sureseal and Sealapex root canal sealers required more analgesic intake after endodontic retreatment?

Participants:

Undergo a single session of endodontic retreatment using one of AH plus, Sureseal or Sealapex root canal sealers.

Visit the clinic one week later after endodontic retreatment Write the condition of analgesic intake and pain score at 6, 12, 24 hours and 2, 3, 4, 5, 6 and 7 days after treatment using a visual analog scale.

Inclusion Criteria:

• Patients who did not have any systemic disease, pregnancy or breastfeeding,
• Patients who were older than 18 years,
• Patients who had not used analgesics, anti-inflammatory or antibiotics in the last 7 days and cortisone in the last 6 months,
• Patients who had improved communication skills and were at a mental level to express pain scoring clearly,
• Patients who did not have bruxism problem or primary contact were included in the study.
• Teeth with more than 60% of the root canal filled have preoperatively asymptomatic single root and single canal with previous root canal treatment and chronic apical periodontitis and periapical index (PAI) scores 2-4

Exclusion Criteria:

• Teeth had root resorption,
• Teeth had crown damage
• Teeth had severe malocclusion,
• Teeth had PAI scores 1 and 5
• Immature teeth