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CompletedNCT02890524Updated Apr 17, 2019

Tokushima Night Guard for Recurrent Aphthous Stomatitis

An interventional study of night guard and placebo night guard in Aphthous Stomatitis, sponsored by University of Tokushima. Completed at 2 sites in Japan. Per ClinicalTrials.gov, last updated 2019-04-17.

Sponsored by University of Tokushima · Not applicable, Interventional, and Prevention

From the registry’s dates

  • Registered 2 years 1 month after the study started (first participant enrolled Jul 2014, registered Aug 2016).
Phase
Not applicable
Study type
Interventional
Enrollment
20
Allocation
Non-randomized
Sex
All
01

Study summary

The investigators will investigate whether the night guard can suppress the development of recurrent aphthous stomatitis (RAS). The investigators will record the patients' oral condition for 60 days before and after intervention with the night guard made of Ethylene-Vinyl Acetate copolymer (EVA). The patients' saliva will be analyzed for measurement of inflammatory cytokines or oxidative stress.

Read the detailed description

The study involved 20 patients (8 male and 12 female) with RAS. These patients suffered from RAS at least once a month. The investigators will record their oral condition for 60 days before and after intervention with the night guard made of EVA. Their saliva will be analyzed for further studies including measurement of inflammatory cytokines or oxidative stress.

02

Conditions studied

  • Aphthous Stomatitis

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Keywords

  • aphthous stomatitis
  • night guard
  • inflammatory cytokine
03

In context

Stomatitis, Aphthous

63 studies on the registry are indexed under Stomatitis, Aphthous; 17 are open to participants now.

This study's enrollment of 20 is below the median of 41 across 54 interventional studies indexed under Stomatitis, Aphthous.

Browse Stomatitis, Aphthous studies →

Lead sponsor

University of Tokushima is the lead sponsor of 3 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
Child (0–17), Adult (18–64), Older adult (65+)
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Patients suffered from recurrent aphthous stomatitis at least once a month

Exclusion criteria

Exclusion Criteria:

  • People do not have a experience of recurrent aphthous stomatitis
05

Study design

Phase
Not applicable
Primary purpose
Prevention
Allocation
Non-randomized
Intervention model
Crossover assignment
Masking
Single (Participant)
Enrollment
20 participants (actual)

Study arms

  • Experimental
    Night guard

    the night guard made of EVA

    Device: night guard

  • Placebo comparator
    Placebo night guard

    Placebo night guard made of EVA

    Device: placebo night guard

Interventions

  • Devicenight guard

    60 days before and after intervention with the night guard

  • Deviceplacebo night guard

    60 days before and after intervention with the placebo night guard

06

What researchers measure

Primary outcomes

  1. number of developed aphthous stomatitis

    Time frame: through study completion, an average of 1 year

Secondary outcomes

  1. days until healing

    Time frame: through study completion, an average of 1 year

07

Study locations

2 sites
  • Tada Dental Clinic
    Kakogawa, Hyogo 675-0121, Japan
  • Tokushima University Hospital
    Tokushima, 770-8503, Japan
08

References and documents

Individual participant data

Plan to share: Undecided

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Jul 2014 to primary completion in Mar 2018, 44 months.

Of 13 interventional studies with no phase under Stomatitis, Aphthous, half reached primary completion within 15 months of starting (the median), counting those still running; a quarter within 5 and three quarters within 19. This study's 44 months is above that.

How these figures are worked out, and which studies are left out of them.

Registered
Aug 21, 2016
First posted
Sep 7, 2016
StartActual
Jul 2014
Primary completionActual
Mar 2018
CompletionActual
Mar 2018
Last update
Apr 17, 2019
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Apr 17, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT02890524
Lead sponsor
University of Tokushima
Responsible party
Yasusei Kudo (Associate Professor, University of Tokushima) — Principal investigator
First posted
Sep 7, 2016
Start date
Jul 2014
Primary completion
Mar 2018
Completion
Mar 2018
Last update
Apr 17, 2019

Study contacts

Yasusei Kudo, DDS, PhD
principal investigator · Tokushima University

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Apr 2019. You cannot join it, but the record below documents what was studied.

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