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CompletedNCT04057430Updated Aug 15, 2019

Effectiveness of the GumChucks® Flossing System Compared to String Floss for Interdental Plaque Removal in Children

An interventional study of GumChucks and String floss in Gingivitis and Plaque, sponsored by University of California, Los Angeles. Completed. Open to participants aged 4 Years to 15 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2019-08-15.

Sponsored by University of California, Los Angeles · Not applicable, Interventional, and Prevention

From the registry’s dates

  • Registered 2 years 8 months after the study started (first participant enrolled Dec 2016, registered Aug 2019).
Phase
Not applicable
Study type
Interventional
Enrollment
40
Allocation
Randomized
Ages
4 Years to 15 Years
Sex
All
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Study summary

This study evaluates the interdental plaque removal efficacy, flossing speed, and reduction in gingival inflammation of a new flossing system (GumChucks®) compared to string floss, and to assess preference between the two flossing products in children, parents, and dentists.

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Conditions studied

  • Gingivitis
  • Plaque

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Keywords

  • Interdental plaque
  • Flossing aid
  • Children
  • Gingival inflammation
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In context

Gingivitis

590 studies on the registry are indexed under Gingivitis; 104 are open to participants now.

This study's enrollment of 40 is below the median of 64 across 478 interventional studies indexed under Gingivitis.

Browse Gingivitis studies →

Lead sponsor

University of California, Los Angeles is the lead sponsor of 1,142 studies on the registry; 192 are open to participants now.

Of its 91 completed or terminated interventional studies of FDA-regulated products, 66 (73%) have results posted.

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

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Who can participate

Ages eligible
4 Years to 15 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • healthy children aged 4-15 years, who were not on any type of medication
  • presence of at least 4 posterior interdental contacts
  • ability to follow verbal and/or written instruction
  • availability for a 4-week study period
  • one parent or legal guardian of each included child participant.

Exclusion criteria

Exclusion Criteria:

  • had antibiotics within the last 6 months
  • are pregnant.
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Study design

Phase
Not applicable
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Outcomes assessor)
Enrollment
40 participants (actual)

Study arms

  • Active comparator
    String floss

    Device: String floss

  • Experimental
    Gumchucks floss

    Device: GumChucks

Interventions

  • DeviceGumChucks

    GumChucks® is an innovative flossing system resembling mini nunchucks. The two-handle design eliminates the need to wrap the floss around fingers, and a proper flossing technique is facilitated by the nature of its curved shaped.

  • DeviceString floss

    Traditional string floss used in this study was Oral-B Glide® Pro-Health Original Floss

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What researchers measure

Primary outcomes

  1. Interdental plaque score - after first use

    Interdental plaque scores were recorded after the teeth were stained with plaque disclosing solutions (GUM® Red-Cote®) for 30 seconds followed by a water rinse. Interdental plaque was scored either presence or absence at 4 sites of each tooth (mesio-buccal, disto-buccal, mesio-lingual, and disto-lingual). Score of 0 = If disclosing solution shows no visible plaque at the site Score of 1 = if disclosing solution shows the presence of any plaque between interproximal contact and the respective line angle of that site. The total interdental plaque score for each participant is the sum of all sites stained positive with disclosing solution.

    Time frame: Baseline and Day 1

  2. Interdental plaque score - after 4 weeks of usage

    Interdental plaque scores were recorded after the teeth were stained with plaque disclosing solutions (GUM® Red-Cote®) for 30 seconds followed by a water rinse. Interdental plaque was scored either presence or absence at 4 sites of each tooth (mesio-buccal, disto-buccal, mesio-lingual, and disto-lingual). Score of 0 = If disclosing solution shows no visible plaque at the site Score of 1 = if disclosing solution shows the presence of any plaque between interproximal contact and the respective line angle of that site.

    Time frame: Baseline and 4 weeks

  3. Gingival index - after 4 weeks of usage

    Gingival inflammation was assessed using the gingival index where the scores were taken of the buccal and lingual margins of the interdental papillae adjacent to interdental contacts with the following scoring system: 0 = absence of inflammation 1. = mild inflammation: slight change in color, little change in texture 2. = moderate inflammation: moderate erythema/edema, bleeding on pressure 3. = severe inflammation: severe erythema/edema, tendency to spontaneous bleeding, ulceration The gingival index score of each participant is the sum of all scores divided by the total numbers of buccal and lingual interdental papillae sites

    Time frame: Baseline and 4 weeks

  4. Flossing speed

    The total time for a participant to floss all interdental contacts was measured in seconds.

    Time frame: Day 1

Secondary outcomes

  1. Floss preferences by children, parents and dentists

    Preferences of child participants, their parents and dentists toward the use of GumChucks® in comparison to string floss was measured by a 5-point Likert scale questionnaire. Child participants and their parents completed questionnaires after using both flossing products, while dentists completed questionnaires after viewing the video and/or live demonstration of GumChucks® usage on a model of the oral cavity.

    Time frame: Day 1

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Study locations

No study locations are listed for this record.

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 15, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT04057430
Lead sponsor
University of California, Los Angeles
Responsible party
Nini Chaichanasakul Tran, DDS, PhD (Assistant Professor, University of California, Los Angeles) — Principal investigator
First posted
Aug 15, 2019
Start date
Dec 10, 2016
Primary completion
Feb 26, 2017
Completion
Feb 26, 2017
Last update
Aug 15, 2019

Oversight

FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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

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