The Purpose of This Research Study is to Compare the Effectiveness of a Non-fluoride Sensitive Whitening Toothpaste, Containing 5% KNO3 (Test) to That of a Non-whitening Fluoride Toothpaste (Negative Control) in Improving Tooth Whiteness (Removal of Extrinsic Stains Over 4 Weeks of Unsupervised Use.

NCT07761715 | Completed DMC

• 1 other identifier: BOKA-WHT-2026-01
• Study Type: interventional
• Target: 100
• Locations: 1 country
• Sites: 1

Brief Summary

The Purpose of This Research Study is to Compare the Effectiveness of a Non-fluoride Whitening Toothpaste (Test) to That of a Non-whitening Fluoride Toothpaste (Negative Control) in Improving Tooth Whiteness (Removal of Extrinsic Stains Over 4 Weeks of Unsupervised Use.

Conditions

Teeth Staining

Outcome Measures

Primary Outcomes (1)

• Tooth color

  The Modified Lobene Stain Index (MLSI) Area x Intensity score for the overall tooth surfaces will be used for measurement of tooth color. The Primary Endpoint is the MLSI (extrinsic stain mean scores) at the 4-week time point compared to baseline.

  4 weeks

Study Arms (2)

Whitening Toothpaste

EXPERIMENTAL

Other: Toothpaste

Non-Whitening Toothpaste

PLACEBO COMPARATOR

Other: Toothpaste

Interventions

Toothpaste OTHER

Toothpaste with stain removing abilities

Non-Whitening Toothpaste; Whitening Toothpaste

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Be ≥18 years old, ambulatory, and ni good general health as determined by the Study Examiner, based upon clinical observation and the Medical/Dental History.
• Be able to understand and sign the Informed Consent, complete a Medical History form, understand and comply with all study directions, and be available for all exam periods.
• Have a mean Macpherson Modified Lobene Stain Index (MLSI) score of ≥ 1.5 on the labial surfaces of at least 8 of 12 anterior teeth.
• Have a minimum of 16 natural teeth.
• Have had dental prophylaxis within the past 18 months, but not within the past 3 months, and agree to refrain from using al oral care products (other dentifrices and toothbrushes, dental floss, and mouthwashes), other than their assigned product, for the duration of the study.
• Agree to refrain from using al whitening products and procedures for the duration of the study.
• Drink stain-forming beverages daily.

You may not qualify if:

• Have a history of serious medical conditions or transmittable diseases including but not limited to active hepatitis, heart irregularities, conditions requiring pre-medication for dental procedures, rheumatic heart disease, untreated diabetes mellitus, cirrhosis, leukemia, phenylketonuria, renal disease, sarcoidosis, tuberculosis, bleeding disorder, vascular disease, AIDS, history of drug allergies or idiosyncrasies, or any other medical condition that may preclude successful participation in the trial, at the discretion of the Study Examiner.
• Have had prior significant adverse effects following the use of oral hygiene products.
• Have the presence of orthodontic bands, retainers, fixed appliances, large restorations, or removable partial dentures, which may interfere with clinical assessments of the evaluable teeth.
• Show evidence of neglected dental health in need of prompt professional attention (i.e., gross calculus deposits or rampant caries), significant oral soft tissue pathology, systemically related gingival enlargement, generalized recession, tissue damage due to ill-fitting appliances or restorations, or extreme crowding or overlapping of teeth. Periodontitis (ADA Class I, I, or IV), e.g., more than two teeth with periodontal pockets \>4 mm as evidenced by purulent exudate, tooth mobility, and other signs indicating that the integrity of the data collected might be compromised.
• Have medication therapy that is current and ongoing or within the past 4 weeks, which might interfere with the outcome of the study by affecting oral tissue condition, salivation, or stain formation (particularly chronic long-term medication therapy).
• Are you nursing (breast-feeding) or pregnant.
• Present at baseline with any reported sensory reactions, observed gum irritation, or any condition that would interfere with subsequent clinical assessments, or subjects with a history of allergy ot oral care products, severe oral cavity sensitivity, or excessive oral irritation.
• Have participated in tooth bleaching or whitening dentifrice trials within the last three months.
• Have had professional or at-home bleaching during the last 6 months.

Sponsors & Collaborators

• Boka LLC: lead

Study Sites (1)

Salus Research, Inc.

Fort Wayne, Indiana, 46825, United States

Location

MeSH Terms

Conditions

Tooth Discoloration

Interventions

Toothpastes

Condition Hierarchy (Ancestors)

Tooth Diseases; Stomatognathic Diseases

Intervention Hierarchy (Ancestors)

Dentifrices; Biomedical and Dental Materials; Manufactured Materials; Technology, Industry, and Agriculture

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: DOUBLE
• Who Masked: PARTICIPANT, INVESTIGATOR
• Purpose: OTHER
• Intervention Model: PARALLEL
• Sponsor Type: INDUSTRY
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: August 8, 2026
• First Posted: August 12, 2026
• Study Start: May 11, 2026
• Primary Completion: June 30, 2026
• Study Completion: June 30, 2026
• Last Updated: August 12, 2026

Record last verified: 2026-08

Data Sharing

• IPD Sharing: Will not share

Locations

US (1)