Effect of Preoperative Diclofenac Potassium Dose on Endodontic Pain

July 29, 2026 updated by: Ameena Khaled Omar Bagunaid, Cairo University

Effect of Diclofenac Potassium Premedication Dose on Anesthetic Success and Post-operative Pain in Mandibular Molars With Symptomatic Irreversible Pulpitis: A Randomized Controlled Trial

The aim of this study is to assess the effect of different doses of diclofenac potassium premedication (100mg vs 50mg) on anesthetic success of 4% articaine buccal infiltration and post-operative pain as compared to placebo in mandibular molars with symptomatic irreversible pulpitis.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Detailed Description

Patients with moderate-to-severe preoperative pain are selected. Patients receive either a single-dose of diclofenac potassium (100mg), diclofenac potassium (50mg) alone or a placebo tablet as a control. All patients will receive the assigned premedication one hour before single-visit root canal treatment. Anesthetic success of articaine buccal infiltration will be assessed during access and instrumentation. Postoperative endodontic pain is measured at the following time points: 6,12,24,48,72h and 7 days after treatment.

Study Type

Interventional

Enrollment (Estimated)

90

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Patients with symptomatic irreversible pulpitis.
  • Patients with moderate to severe pain.
  • Mandibular molars
  • Patients with the ability to understand and use the pain scale

Exclusion Criteria:

  • Patients allergic to any medication or material to be used in the study.
  • Pregnant and lactating females.
  • Patients taking medications affecting pain perception in the last 12 hours.
  • Patients having more than one symptomatic molar in the same quadrant.
  • Patients with contributory medical history (ASA I or II).

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: 100mg Diclofenac potassium
Preoperative single dose of diclofenac potassium 100mg
Drug: Diclofenac potassium 100mg
Preoperative single dose of diclofenac potassium 100mg
Active Comparator: 50mg Diclofenac potassium
Preoperative single dose of diclofenac potassium 50mg
Drug: Diclofenac potassium 50mg
Preoperative single dose of diclofenac potassium 50mg
Placebo Comparator: Placebo
Preoperative placebo
Drug: Placebo
Preoperative placebo

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Anesthetic success of articaine buccal infiltration
Time Frame: During the treatment
Will be recorded by 11 point NRS consisting of numbers from 0 through 10. 0: reading represents "no pain" 1-3 : readings represent "mild pain" 4-6 : readings represent "moderate pain" 7-10 : readings represent "severe pain" 0: reading represents "no pain" 1-3 : readings represent "mild pain" 4-6 : readings represent "moderate pain" 7-10 : readings represent "severe pain". Success will be defined as no to mild pain.
During the treatment

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Postoperative pain at 6 hours
Time Frame: 6 hours
Will be recorded by 11 point NRS consisting of numbers from 0 through 10. 0: reading represents "no pain" 1-3 : readings represent "mild pain" 4-6 : readings represent "moderate pain" 7-10 : readings represent "severe pain" 0: reading represents "no pain" 1-3 : readings represent "mild pain" 4-6 : readings represent "moderate pain" 7-10 : readings represent "severe pain"
6 hours
Postoperative pain at 12 hours
Time Frame: 12 hours
Will be recorded by 11 point NRS consisting of numbers from 0 through 10. 0: reading represents "no pain" 1-3 : readings represent "mild pain" 4-6 : readings represent "moderate pain" 7-10 : readings represent "severe pain" 0: reading represents "no pain" 1-3 : readings represent "mild pain" 4-6 : readings represent "moderate pain" 7-10 : readings represent "severe pain"
12 hours
Postoperative pain at 24 hours
Time Frame: 24 hours
Will be recorded by 11 point NRS consisting of numbers from 0 through 10. 0: reading represents "no pain" 1-3 : readings represent "mild pain" 4-6 : readings represent "moderate pain" 7-10 : readings represent "severe pain" 0: reading represents "no pain" 1-3 : readings represent "mild pain" 4-6 : readings represent "moderate pain" 7-10 : readings represent "severe pain"
24 hours
Postoperative pain at 48 hours
Time Frame: 48 hours
Will be recorded by 11 point NRS consisting of numbers from 0 through 10. 0: reading represents "no pain" 1-3 : readings represent "mild pain" 4-6 : readings represent "moderate pain" 7-10 : readings represent "severe pain" 0: reading represents "no pain" 1-3 : readings represent "mild pain" 4-6 : readings represent "moderate pain" 7-10 : readings represent "severe pain"
48 hours
Postoperative pain at 72 hours
Time Frame: 72 hours
Will be recorded by 11 point NRS consisting of numbers from 0 through 10. 0: reading represents "no pain" 1-3 : readings represent "mild pain" 4-6 : readings represent "moderate pain" 7-10 : readings represent "severe pain" 0: reading represents "no pain" 1-3 : readings represent "mild pain" 4-6 : readings represent "moderate pain" 7-10 : readings represent "severe pain"
72 hours
Postoperative pain at 7 days
Time Frame: 7 days
Will be recorded by 11 point NRS consisting of numbers from 0 through 10. 0: reading represents "no pain" 1-3 : readings represent "mild pain" 4-6 : readings represent "moderate pain" 7-10 : readings represent "severe pain" 0: reading represents "no pain" 1-3 : readings represent "mild pain" 4-6 : readings represent "moderate pain" 7-10 : readings represent "severe pain"
7 days

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Cairo University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

August 1, 2026

Primary Completion (Estimated)

August 1, 2027

Study Completion (Estimated)

February 1, 2028

Study Registration Dates

First Submitted

July 29, 2026

First Submitted That Met QC Criteria

July 29, 2026

First Posted (Actual)

August 3, 2026

Study Record Updates

Last Update Posted (Actual)

August 3, 2026

Last Update Submitted That Met QC Criteria

July 29, 2026

Last Verified

February 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • ENDO-CU-222026

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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