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Diabetes may worsen pain after root canal retreatment, study suggests

NCT ID NCT07679880

Symptom relief Sponsor: TC Erciyes 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jul 01, 2026 · Last updated Jul 02, 2026 · Updated 1 time

Summary

This study looks at whether people with diabetes experience more pain after a second root canal treatment compared to those without diabetes. About 50 adults with a single-rooted tooth needing retreatment will take part. Pain levels and painkiller use will be tracked for a week after the procedure. The study also explores how blood sugar control and diabetes medications relate to pain.

What this could mean

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

Active substance
root canal retreatment
What this could lead to
If successful, this study could help dentists better manage pain after root canal retreatment in people with diabetes.
What could go wrong
This is a small, early-stage study with only 50 participants, so results may not apply to everyone. Pain is subjective and hard to measure precisely.

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

50 people

The number who actually took part.

Started

Jan 2026

Finished

Apr 2026

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 60 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: Patients aged 18 to 60 years. Patients classified as medically healthy (ASA I) for the control group or as having diabetes mellitus (ASA II or ASA III) for the diabetes mellitus group. Single-rooted, single-canal teeth with closed apices. Teeth with previous root canal treatment completed at least 4 years before enrollment. Teeth with root canal filling ending 1 to 4 mm coronal to the radiographic apex. Teeth diagnosed with asymptomatic apical periodontitis. Teeth with a periapical index score between 2 and 4. Teeth without pain on percussion or palpation. Teeth not requiring periodontal or prosthetic treatment. Teeth suitable for rubber dam isolation. Exclusion Criteria: Use of analgesics, antibiotics, or corticosteroids within the last 2 weeks before nonsurgical endodontic retreatment. Teeth with periodontal attachment loss. Teeth with vertical root fracture, external root resorption, or perforation. Teeth with fractured prosthetic restorations. Non-restorable teeth. Patients with severe pain and/or acute apical abscess. Pregnant patients. Teeth with calcified root canals. Individuals considered unable to comply with treatment procedures because of intellectual disability, developmental delay, or advanced age.

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Conditions

The condition(s) this trial relates to.

diabetes mellitus periapical periodontitis

As listed by the trial registrant

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

Apical periodontitis

Contacts and locations

Locations

  • Erciyes University

    Kayseri, Kayseri, 38039, Turkey (Türkiye)

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