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Tooth analysis may reveal environmental clues to Crohn's disease

NCT ID NCT03706196

Knowledge-focused Sponsor: University Hospital, Lille Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 looked at teeth from 14 adults living in areas with high or low rates of Crohn's disease. Researchers measured metals and other environmental chemicals in the teeth to see if differences might help explain why some areas have more Crohn's disease. The goal was to gather clues, not to test a treatment.

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.

Participants

14 people

The number who actually took part.

Started

Apr 2019

Finished

Jul 2019

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.

Who is studied

adults subjects living in high and low incidence of crohn's disease areas and needing a dental extraction for medical indication.

Ages

18 years and older

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: * adults subjects living in high and low incidence of crohn's disease areas and needing a dental extraction for medical indication Exclusion Criteria: * smokers during 10 last years

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Conditions

The condition(s) this trial relates to.

Crohn disease

As listed by the trial registrant

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

Environmental exposure

Contacts and locations

Locations

  • CHU lille

    Lille, 59037, France

More trials for these conditions

Other studies related to the condition(s) this trial covers.