Antibacterial Effect of Two Different Intracanal Medicaments and Their Effect on Post-operative Pain (Ca(OH)2 - CNPs)

January 28, 2026 updated by: Rana mohamed mustafa nagdy, Ain Shams University

Comparative Evaluation of Anti-Bacterial Efficacy Of Two Different Intracanal-Medicaments and Their Effect On Post-Operative Pain Level (A Randomized Clinical Trial)

Evaluation of antibacterial effect of two different intracanal medicaments on bacterial load in infected mature permanent teeth and their effect on post-operative pain level.

Study Overview

Status

Not yet recruiting

Conditions

Detailed Description

Microorganisms within the root canal system exist as complex, multispecies biofilms made up of microcolonies that adhere permanently to each other and to surfaces such as dentin. The characteristics of these biofilms-including their composition, thickness, and location-vary according to environmental conditions like nutrient availability, pH, oxygen levels, and exposure to the oral cavity. Endodontic treatment aims to save teeth with damaged pulp tissue, as maintaining natural teeth is essential for proper oral function and overall health. Understanding the specific microorganisms involved in endodontic infections is crucial for explaining disease progression and selecting the most effective treatment strategies.

Because of the intricate anatomy of the root canal system, both mechanical instrumentation and chemical irrigation are required to reduce microbial load. However, chemo-mechanical debridement alone is often insufficient, allowing some bacteria to persist within the canal. As a result, antimicrobial intracanal medicaments have been introduced to enhance disinfection. Although several medicaments are currently used, many show limitations such as microbial resistance or an inability to simultaneously control intracanal infection and periapical inflammation. Additionally, antimicrobial agents may interact with the immune system, potentially suppressing or stimulating immune responses.

Enterococci, particularly *Enterococcus faecalis*, are frequently associated with persistent endodontic infections due to their resistance to treatment and ability to survive harsh conditions. Calcium hydroxide, a material introduced to dentistry in the early 20th century, is widely used as an intracanal medicament but has limited effectiveness against certain bacteria such as *E. faecalis*. Recent interest has focused on nanoparticles, which range from 1 to 100 nm in size and possess unique antimicrobial properties with reduced resistance. Among these, chitosan nanoparticles-derived from chitin found in crustacean exoskeletons-have gained attention for their biocompatibility and antibacterial effects. Effective intracanal medicaments are also important in reducing postoperative pain, which is commonly linked to bacterial irritation following endodontic treatment.

Study Type

Interventional

Enrollment (Estimated)

52

Phase

  • Phase 4

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

Study Locations

      • Cairo, Egypt
        • Faculty Of Dentistry Ain Shams University

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

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • free medical history,
  • mature infected permanent single rooted teeth diagnosed clinically and radiographically with adequate coronal structure for proper isolation, temporization and restoration.

Exclusion Criteria:

  • Patients who are not included in the age range of the study or having a systemic condition.
  • Teeth with severe fractures or resorption or periodontally compromised.

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: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
No Intervention: control
Active Comparator: calcium hydroxide (Ca(OH)2)
intracanal medicament in infected root canal
Non setting calcium hydroxide intracanal medicament is injected through the root canal for two weeks
Experimental: Chitosan nano particles (CNPs)
intracanal medication in infected root canal
Nano chitosan gel is injected through the root canal as an intracanal medicament for two weeks

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Bacterial load.
Time Frame: two weeks
Samples will be collected from the infected root canal before and after injection of intracanal medicaments then bacterial colonies will be counted for colony forming units per milliliter (CFU/ml) to assess the effect of the intracanal medicaments used.
two weeks

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Visual Analogue Scale (VAS) to measure post operative pain level.
Time Frame: 12 hours, 24 hours, 48 hours, 72 hours.
the patient is given a 10 cm sheet to mark their pain level where (0) represents no pain and (10) the worst pain.
12 hours, 24 hours, 48 hours, 72 hours.

Collaborators and Investigators

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

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)

February 1, 2026

Primary Completion (Estimated)

February 1, 2027

Study Completion (Estimated)

April 1, 2027

Study Registration Dates

First Submitted

January 21, 2026

First Submitted That Met QC Criteria

January 28, 2026

First Posted (Actual)

February 5, 2026

Study Record Updates

Last Update Posted (Actual)

February 5, 2026

Last Update Submitted That Met QC Criteria

January 28, 2026

Last Verified

December 1, 2025

More Information

Terms related to this study

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

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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