CClinicalTrials.gg
CompletedNCT00743548Updated Nov 16, 2010

Comparing the Inter-dental Brush to Dental Floss

A Phase 3 interventional study of IB = Interdental brush, the intervention and DF = Dental floss, the positive control in Gingivitis, sponsored by University of British Columbia. Completed at 1 site in Canada. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2010-11-16.

Sponsored by University of British Columbia · Phase 3, Interventional, and Prevention

Phase
Phase 3
Study type
Interventional
Enrollment
32
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

The study's purpose is to find an easy and effective alternative to dental floss for those persons who cannot or choose not to dental floss so that they can maintain and/or achieve optimal oral health. The study hypothesis is that the inter-dental brush is as effective as dental floss for removing plaque from between the teeth and for reducing bleeding gums in persons with gingivitis, but may be easier to use and thus encourage daily home use.

Read the detailed description

Purpose:

To determine if the interdental brush is just as effective at removing plaque and reducing bleeding gums between the teeth as dental floss.

Rationale:

Many people find dental floss difficult to use and thus, do not floss daily to maintain oral health and prevent gum disease. These individuals may find the interdental brush easier to use and may be motivated to use it daily for optimal oral health.

Study design:

Study subjects will use the dental floss AND the interdental brush for 12 weeks. Plaque and bleeding scores will be measured before the study begins (week 0), mid-way (week 6), and at the end of the 12 weeks. All study subjects receive a teeth cleaning prior to the first measurements and oral hygiene instructions on how to floss and use the interdental brush. Subjects will also answer 4 short questions about their product preference and ease of use.

Study subjects:

32 healthy adult volunteers with bleeding gums. To be included in the study, subjects require 8 bleeding sites, 4 areas that can accommodate the interdental brush, dexterity to dental floss, and willingness to come for 4 study visits. Exclusion criteria include smokers because this can affect the bleeding scores; individuals with braces (orthodontia) which affects plaque levels; individuals using chlorhexidine which is a prescription strength mouthwash used to treat moderate to severe gum disease; pregnant women; and those individuals requiring antibiotics prior to dental appointments. Enrolled study subjects receive a teeth cleaning (value $180), $75 for completing the study, and all study related supplies.

02

Conditions studied

  • Gingivitis

Browse trials for

Keywords

  • interdental self-care aids
  • plaque
  • bleeding gums
03

In context

Gingivitis

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

This study's planned enrollment of 32 is below the median of 64 across 478 interventional studies indexed under Gingivitis.

Browse Gingivitis studies →

Lead sponsor

University of British Columbia is the lead sponsor of 1,310 studies on the registry; 253 are open to participants now.

Of its 6 completed or terminated interventional studies of FDA-regulated products, 1 (17%) have results posted.

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

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • Adults
  • Minimum of 4 interproximal areas that can accommodate a minimum 0.6 mm interdental brush width
  • Minimum of 8 interproximal bleeding sites upon stimulation
  • Dexterity to use manual waxed dental floss
  • Able to attend all 4 study visits

Exclusion criteria

Exclusion Criteria:

  • Require premedication with antibiotics prior to dental therapy
  • Use chlorhexidine or over-the-counter mouthwash during the study
  • Smoke
  • Have orthodontia
05

Study design

Phase
Phase 3
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Single group
Masking
Single (Investigator)
Enrollment
32 participants (estimated)

Study arms

  • Active comparator
    1

    Interdental brush (IB), the intervention is a small multi-tufted brush on a wire attached to a long angled handle that is inserted in a horizontal plane between the teeth. The IB is inserted once and removed.

    Device: IB = Interdental brush, the intervention

  • Placebo comparator
    2

    Dental floss (DF), the positive control, is waxed dental floss; nylon covered with a water soluble unflavoured wax to facilitate easier access the contact points of teeth. DF is rubbed against the interproximal surfaces of the teeth 2-4 times on each surface.

    Device: DF = Dental floss, the positive control

Interventions

  • DeviceIB = Interdental brush, the intervention

    IB is a small multi-tufted brush on a wire attached to a long angled handle that is inserted in a horizontal plane between the teeth. The IB is inserted once and removed.

  • DeviceDF = Dental floss, the positive control

    DF is waxed dental floss; nylon covered with a water soluble unflavoured wax to facilitate easier access the contact points of teeth. DF is rubbed against the interproximal surfaces of the teeth 2-4 times on each surface.

06

What researchers measure

Primary outcomes

  1. Plaque and bleeding reduction

    Time frame: 12 weeks

Secondary outcomes

  1. Product preference between dental floss and interdental brush

    Time frame: 12 weeks

07

Study locations

1 site
  • University of British Columbia Nobel Biocare Oral Health Centre
    Vancouver, British Columbia V6T 1Z3, Canada
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Nov 16, 2010, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT00743548
Lead sponsor
University of British Columbia
Collaborators
Canadian Foundation for Dental Hygiene Research and Education, British Columbia Dental Hygienists' Association (BCDHA), Curaden Swiss
First posted
Aug 29, 2008
Start date
Aug 2008
Primary completion
Nov 2010
Completion
Nov 2010
Last update
Nov 16, 2010

Study contacts

Pauline Imai, MSc.
principal investigator · University of British Columbia
Penny Hatzimanolakis
study director · University of British Columbia

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Nov 2010. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion