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