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Can a Flat-Sided dental file mean less pain after a root canal?

NCT ID NCT07808684

Symptom relief Sponsor: Minia University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 09, 2026 · Last updated Sep 10, 2026 · Updated 1 time

Summary

Researchers at Minia University are testing whether the shape of a single-file rotary dental instrument affects how much debris gets pushed out of the root tip during a root canal, and whether that changes how much pain patients feel afterward. Thirty teeth with irreversible pulpitis will be treated in one visit. Half will be cleaned with the AF One system, which has a flat-sided design, and half with the One Curve system. The team will measure debris extruded in the lab and track patients' pain scores for seven days.

What this could mean

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

Active substance
AF One single-file rotary system, a dental file with a flat-sided design used to clean and shape root canals
What this could lead to
If the flat-sided file design pushes less debris past the root tip, dentists could choose it to reduce soreness after a single-visit root canal.
What could go wrong
This is a small study of 30 teeth at one dental school. Pain after root canals varies widely between people, so any difference between the two file systems may be too small to detect or may not hold up in larger practices.

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

About 30 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jun 2026

Expected to finish

Dec 2026

An estimate. End dates often move.

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

20 to 40 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: * Teeth with mature apex * Straight root canal or mild curvature not exceeding(5-10) Schneider. * Has intact crown ( coronal structure) * Presence of one orifices and one apices, patency achieved by a #10-15 K-file to the apical foramen Exclusion Criteria: * Previous root canal treatment. * Internal/external resorption. * Immature root apices. * Caries/cracks/fractures on the root surface. * Root canal curvature more than 10 degrees. * Teeth in which the apical minor constriction was gauged larger than a size 20 hand file.

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Conditions

The condition(s) this trial relates to.

Pain, Postoperative pulpitis

As listed by the trial registrant

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

Irreversible pulpitis Postoperative pain

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Endodontics, Faculty of Dentistry, Minia University

    RECRUITING

    Minya, Minya Governorate, Egypt

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