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New dental device mode may ease pain after root canal redo

NCT ID NCT07527897

Symptom relief Sponsor: Recep Tayyip Erdogan University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested whether using different modes on an electronic apex locator (a tool that measures tooth canal length) during root canal retreatment could reduce pain afterward. 144 adults with infected teeth were split into four groups: one used a standard locator, and three used a motor with special modes (reverse, slow down, or stop). Pain was tracked for a week. The goal was to see if these modes make retreatment less painful.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Electronic Apex Locator (device)
What this could lead to
If successful, this could help dentists choose a device mode that reduces post-treatment pain for patients needing root canal retreatment.
What could go wrong
This is a small, completed trial focused on pain levels, not a cure or major breakthrough. Results may not apply to all teeth or patients.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

144 people

The number who actually took part.

Started

Aug 2025

Finished

Oct 2025

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 65 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Systemically healthy patients aged between 18 and 65 years * Patients requiring nonsurgical endodontic retreatment * Single-rooted, single-canal mandibular premolar teeth * Diagnosis of asymptomatic apical periodontitis * Presence of a well-defined periapical radiolucency (PAI \> 4) * Teeth with previous root canal treatment performed at least 4 years prior * Root canal fillings extending to at least the apical third without overfilling Exclusion Criteria: * Patients with symptoms such as pain, swelling, or sinus tract * Patients with a history of smoking or alcohol use * Teeth with open apices or root resorption * Teeth with intraradicular posts * Teeth with insufficient coronal tooth structure * Teeth with perforation, instrument fracture, or overfilled canals * Teeth with root curvature greater than 30 degrees * Teeth with periodontal disease or probing depth \>3 mm * Cases not suitable for single-visit retreatment * Patients who used analgesics within 12 hours prior to treatment * Patients who used antibiotics within the last month * Patients with cognitive impairment or psychological disorders

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Conditions

The condition(s) this trial relates to.

Pain, Postoperative periapical periodontitis

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Apical periodontitis Endodontic retreatment Postoperative pain

Contacts and locations

Locations

  • Recep Tayyip Erdogan University Faculty of Dentistry

    Rize, Rize Province, 53000, Turkey (Türkiye)

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