Postoperative Pain After the Removal of Root Canal Filling Material


The aim of this study was to evaluate the intensity and duration of postoperative pain after the removal of root canal filling material in retreatment procedures of upper incisor teeth with chronic apical periodontitis, using different techniques.

The patients were assigned to three groups of 45 patients, according to the method used to remove old canal filling material. The presence of postoperative pain was assessed after 6, 12, 24, 48, and 72 hours, 7 days, and finally after 10 days.

The hypothesis of this study: there would be no difference in postoperative pain intensity among the groups.

Full Title of Study: “Postoperative Pain After the Removal of Root Canal Filling Material Using Different Techniques in Teeth With Failed Root Canal Therapy: A Randomized Clinical Trial”

Study Type

  • Study Type: Interventional
  • Study Design
    • Allocation: Randomized
    • Intervention Model: Parallel Assignment
    • Masking: Double (Participant, Investigator)
  • Study Primary Completion Date: May 2016


  • Other: root canal therapy
    • effect of devices ( ProTaper and Reciprocal Files)
  • Other: root canal retreatment
    • effect of devices ( ProTaper and Reciprocal Files)

Arms, Groups and Cohorts

  • Other: postoperative pain
    • postoperative pain
  • Other: intensity
    • intensity

Clinical Trial Outcome Measures

Primary Measures

  • postoperative pain after non-surgical endodontic retreatment using modified visual analog scale
    • Time Frame: 10 days

Participating in This Clinical Trial

Inclusion Criteria

  • asymptomatic incisor teeth with chronic apical periodontitis
  • patients between 18-55 years of age

Exclusion Criteria

  • patients with systemic disease

Gender Eligibility: All

Minimum Age: N/A

Maximum Age: N/A

Are Healthy Volunteers Accepted: Accepts Healthy Volunteers

Investigator Details

  • Lead Sponsor
    • TC Erciyes University
  • Provider of Information About this Clinical Study
    • Principal Investigator: Hüseyin Sinan TOPÇUOĞLU, Associate Professor – TC Erciyes University

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