The relationship between different root canal irrigation techniques and pain after root canal treatment

Inclusion Criteria:

• o Patients aged 18-60 years who are classified as medically healthy (ASA I or II),

  • Mature, single-rooted and canal teeth that had root canal treatment at least four years ago,
  • Teeth with previous root canal obturation 2-4 mm short of the apex,
  • Teeth that do not need periodontal and prosthetic treatment and whose periapical index score (PAI) is between 2 and 4 ,
  • Teeth with single root and canal diagnosed with asymptomatic apical periodontitis,
  • Teeth suitable for rubber dam isolation.

Exclusion Criteria:

• o Patients who had taken analgesics, antibiotics, or corticosteroids within two weeks before root canal retreatment,

  • Teeth exhibiting periodontal attachment loss,
  • Presence of vertical root fractures, external root resorption, or perforations,
  • Teeth with retained broken instruments,
  • Non-restorable teeth,
  • Patients in the pregnancy and breastfeeding period.