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Efficacy of Different Disinfection Technologies in Molar Non-Surgical Retreatment

NCT07469150 · Status: NOT_YET_RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 60

Last updated 2026-04-08

No results posted yet for this study

Summary

Post-treatment apical periodontitis is commonly associated with persistent intracanal infection following root canal treatment. Effective disinfection of the complex root canal system during nonsurgical retreatment remains challenging due to anatomical complexities that may harbor microbial biofilms. Conventional retreatment protocols typically involve nickel-titanium rotary instrumentation combined with irrigation using sodium hypochlorite and activation techniques such as Passive Ultrasonic Irrigation (PUI).

The GentleWave System (GWS) is a minimally invasive irrigation technology designed to enhance tissue dissolution and microbial removal through multisonic energy, advanced fluid dynamics, and negative pressure. Although preliminary studies suggest promising results in root canal disinfection and patient outcomes, high-level clinical evidence comparing GWS with conventional retreatment techniques remains limited, particularly in molar teeth with post-treatment apical periodontitis.

This randomized clinical study aims to compare the disinfection efficacy of GWS with a conventional nickel-titanium rotary instrumentation protocol combined with PUI in nonsurgical retreatment of molars with post-treatment apical periodontitis. Intracanal bacterial load will be quantified using quantitative polymerase chain reaction (qPCR), and microbial composition will be analyzed using next-generation sequencing (NGS). Residual organic debris will be evaluated using the chairside diagnostic device Endocator and facultative bacterial culturing. Postoperative pain levels will also be recorded to assess short-term clinical outcomes.

The results of this study will provide clinical evidence regarding the comparative effectiveness, safety, and potential advantages of advanced irrigation technology for root canal disinfection in complex retreatment cases.

Conditions

  • Apical Periodontitis

Interventions

PROCEDURE

GentleWave System

Minimally invasive root canal disinfection using the GentleWave multisonic irrigation system following minimal instrumentation. The system delivers multisonically activated sodium hypochlorite and EDTA solutions under negative pressure to enhance irrigation dynamics and debris removal within the root canal system during nonsurgical endodontic retreatment.

PROCEDURE

Conventional rotary instrumentation with passive ultrasonic irrigation

Conventional nonsurgical endodontic retreatment using nickel-titanium rotary instrumentation followed by passive ultrasonic irrigation (PUI). Irrigation is performed using sodium hypochlorite delivered via a side-vented needle and ultrasonically activated irrigation to enhance canal disinfection after mechanical preparation.

Sponsors & Collaborators

  • University of Alabama at Birmingham

    lead OTHER

Principal Investigators

  • Can Wang, PhD · University of Alabama at Birmingham

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Model
PARALLEL

Eligibility

Min Age
16 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2027-07-31
Primary Completion
2030-06-30
Completion
2030-12-31

Countries

  • United States

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07469150 on ClinicalTrials.gov