To Compare the Effectiveness of Three Self-care Oral Hygiene Regimens

Water Pik, Inc. (Industry)
Overall Status
Completed ID

Study Details

Study Description

Brief Summary

The study is designed to evaluate the clinical changes in gingival health by measuring the reduction of gingival bleeding and inflammation over 4 weeks. Additionally, plaque removal will be evaluated after a single use (part 1) and over 4 weeks (part 2).

Condition or Disease Intervention/Treatment Phase
  • Device: Power device A
  • Device: Power device B
  • Device: Routine Oral Hygiene

Detailed Description

Data will be analyzed and reported as mean. The target population is approximately 105 healthy adult volunteers. there will be three groups with 35 subjects per group. Subjects will be randomized using a simple random sample. A computer-generated randomization schedule will be prepared by the study statistician. Based on the randomization schedule, subjects will be randomly assigned in a 1:1:1 ratio.

With 35 subjects per group, the study will have 90% power to detect an average reduction in the percent of sites with BOP of 25%.

The primary outcome will be the reduction in the percentage of sites with bleeding on probing (BOP) after 4 weeks.

Reduction in the percentage of sites with BOP after 2 weeks (+/- 2 days). Reduction in the Modified Gingival index after 2 (+/- 2 days) and 4 weeks (+/- 2 days). Reduction in Rustogi Modification of Navy Plaque Index pre & Post, 2 weeks (+/- 2 days) and 4 weeks (+/- 2 days).

Data will include whole mouth, approximal, marginal, facial, and lingual analysis for all indices. Intraoral examination will be performed and any adverse events will be reported and followed-up.

Subjects will complete a questionnaure at the completion of the study.

Study Design

Study Type:
Actual Enrollment :
105 participants
Intervention Model:
Parallel Assignment
Single (Investigator)
Primary Purpose:
Official Title:
To Determine the Effectiveness of a Sonic Toothbrush and Interdental Device With Different Toothbrush Designs to Brushing and Flossing on Plaque, Gingival Bleeding and Inflammation: a 4-week Randomized Controlled Trial
Actual Study Start Date :
Oct 19, 2020
Actual Primary Completion Date :
Nov 20, 2020
Actual Study Completion Date :
Jan 8, 2021

Arms and Interventions

Arm Intervention/Treatment
Experimental: Sonic-Floss toothbrush and small brush head

sonic toothbrush used for 2 minutes and water flosser used for 1 minute

Device: Power device A
Oral hygiene regimen completed daily

Experimental: Sonic-Floss toothbrush and full size brush head

sonic toothbrush used for 2 minutes and water flosser used for 1 minute

Device: Power device B
Oral hygiene regimen completed daily

Active Comparator: Manual brushing and flossing

American Dental Association standard manual toothbrush used for 2 minutes and dental floss all teeth

Device: Routine Oral Hygiene
Oral hygiene regimen completed daily

Outcome Measures

Primary Outcome Measures

  1. Bleeding on Probing [4 weeks]

    Binary measure of present = 1 or absent =0. Mean score is determined by adding the total number of sites with bleeding (six per tooth) and dividing by the total evaluable sites.

  2. Modified Gingival Index [4 weeks]

    Index uses a 0 - 4 point scale

Secondary Outcome Measures

  1. Rustogi Modification of the Navy Plaque Index [4 weeks]

    Each tooth is scored using 9 sections for the facial and lingual surfaces.

Eligibility Criteria


Ages Eligible for Study:
18 Years to 70 Years
Sexes Eligible for Study:
Accepts Healthy Volunteers:
Inclusion Criteria:
  • Provided written informed consent prior to being entered into the study

  • Have at least twenty (20) natural teeth (5 evaluable teeth in each quadrant) with scorable facial and lingual surfaces as determined by examiner

  • No tobacco use or other substance via the mouth including but not limited to cigarettes, cigars, smokeless tobacco hookah, cannabis, snuff, chew, or vaping electronic cigarettes

  • Have a minimum of 50% bleeding on probing sites (6 sites per tooth, total of 120 - 168 total sites)

  • Have probing depths </= 4 mm

  • Have a mean baseline gingival index score of >/= to 1.75 as determined by the Modified Gingival Index.

  • Agree not to have a dental prophylaxis or any other elective, non-emergency dental procedures any time during the study

  • Agree to abstain from the use of chewing gum, mouth rinses, any toothpaste other than the study toothpaste, tooth whitening products (either professional or at home use) and all other oral hygiene aids other than the study procedures for the duration of the study

  • Agree to refrain from all oral hygiene on morning of each evaluation visit

  • Agree to comply with the conditions ad schedule of the study

Exclusion Criteria:
  • Physical limitations or restrictions that might preclude normal tooth brushing.

  • Evidence of gross oral pathology, including widespread caries or chronic neglect, extensive restoration, pre-existing gross plaque or soft or hard tissue tumor of the oral cavity.

  • Heavy supra- or subgingival calculus that might interfere with evaluations as determined by the examiner.

  • Evidence of major oral hard or soft tissue lesions or trauma at the baseline visit as determined by the examiner.

  • Conditions requiring antibiotic treatment prior to dental procedures.

  • History of uncontrolled diabetes or hepatic or renal disease, or other serious conditions or transmittable disease, (e.g. cardiomyopathy, immunocompromised).

  • Subjects with several fully crowned or extensively restored teeth, orthodontic appliances, peri/oral piercings, or removable partial dentures.

  • Treatment with antibiotics within 6 months before the baseline examination, or a condition that is likely to require antibiotic treatment over the course of the trial.

  • Chronic treatment (2-weeks or more) with any medication known to affect periodontal status (including phenytoin, calcium antagonists, cyclosporine, Coumadin, nonsteroidal anti-inflammatory drugs, and aspirin (325 mg)) within the month before the baseline examination. All other medications for chronic medical conditions must have been initiated at least 3 months before enrollment.

  • Have severe periodontal disease or being actively treated for periodontal disease.

  • Having history of early-onset periodontitis or acute necrotizing ulcerative gingivitis.

  • Concomitant periodontal therapy other than prophylaxis in the last 3 months.

  • Professional prophylaxis within 1 month prior to the baseline clinical evaluation.

  • Subjects who participated in a gingivitis study in the past month.

  • History of significant adverse event following use of oral hygiene products such as toothpastes and mouth rinses.

  • Self-reported pregnancy or lactating women or planning to become pregnant during the study.

Contacts and Locations


Site City State Country Postal Code
1 All Sum Research Center Mississauga Ontario Canada L5N 6J2

Sponsors and Collaborators

  • Water Pik, Inc.


  • Study Director: Jimmy G Qaqish, BSc, All Sum Research Center Ltd.

Study Documents (Full-Text)

None provided.

More Information


None provided.
Responsible Party:
Water Pik, Inc. Identifier:
Other Study ID Numbers:
  • 28SFTBF2020
First Posted:
Mar 18, 2021
Last Update Posted:
Oct 11, 2021
Last Verified:
Nov 1, 2020
Studies a U.S. FDA-regulated Drug Product:
Studies a U.S. FDA-regulated Device Product:
Product Manufactured in and Exported from the U.S.:
Additional relevant MeSH terms:

Study Results

No Results Posted as of Oct 11, 2021