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Can a simple text message get you to the dentist?

NCT ID NCT07585682

Knowledge-focused Sponsor: University of Chile 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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 2 times

Summary

This study looks at how different types of WhatsApp messages influence whether people schedule a preventive dental check-up. Over 100,000 adults will receive one of several messages that vary in length and how they describe the benefits of a dental visit. The goal is to find out which message style works best to encourage preventive care.

What this could mean

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

Active substance
WhatsApp messages with different framings
What this could lead to
If successful, this could show the best way to word health messages to get more people to schedule preventive dental visits.
What could go wrong
This is a behavioral study, not a medical treatment. Results may not apply to other health areas or populations.

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 100,000 people

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

Started

Jan 2026

Expected to finish

May 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

18 years and older

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: * Patients aged 18 and above * Have a valid mobile phone number that can receive WhatsApp messages, recorded in the hospital network's patient database * Attended a non-dental medical appointment the day before the intended contact day OR have a non-dental medical appointment within the week after the intended contact day * Have not been contacted in the past two months about preventive dental checkups * Have not attended a dental appointment at the hospital network in the past 6 months Note: The partnering clinic agreed to run the study until a concurrent experiment registered at NCT07121673 is finished. The investigators aim to reach 100,000 patients by then, but the final sample size will vary depending on the actual outreach efforts by the end of the study period.

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As listed by the trial registrant

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

Preventive oral health

Contacts and locations

Locations

  • Partnering clinic network

    Santiago, Chile

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