Salivary Fluoride Clearance

Evaluation of Salivary Fluoride Clearance Following the Use of Three MFP-Containing Dentifrices

This is a single-center, four-treatment, four-period crossover study. Over the course of the study, up to thirty qualified subjects will use four (4) study treatment products, one time each according to the randomization. Subjects will brush with 1.25g of the assigned study product at each visit. Subjects will provide saliva samples at baseline and at 2, 6, 12, and 30 minutes post-treatment. The F- concentrations in each saliva sample will be determined by ion chromatography

Study Overview

• Status: Completed
• Conditions: Caries
• Intervention / Treatment: Drug: 0 ppm F; Drug: 250 ppm F as MFP; Drug: 1100 ppm as MFP; Drug: 2800 ppm F as MFP

• Study Type: Interventional
• Enrollment (Actual): 27
• Phase: Phase 1

Contacts and Locations

Study Locations

• United States
  • Ohio
    • Mason, Ohio, United States, 45040
      • Oral Health Science Center

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

• Be at least 18 years of age;
• Provide written informed consent prior to study participation and be given a signed copy of the Informed Consent form;
• Be in good general health as determined by the Investigator/Designee based on a review of their medical history;
• Have at least 16 natural teeth;
• Have normal salivary flow (0.3-0.6 ml/min) or deemed acceptable by the Investigator/Designee as determined in a previous screening outside of this protocol;
• Agree not to participate in any other oral care studies for the duration of this study;
• Agree not to change their current oral care routine except 1) to refrain from using mouth rinse and 2) to agree to use study washout product as designated (current floss users are permitted to continue to floss during this study); viii. Agree to delay elective dentistry, including dental prophylaxis, until study completion, and to report any non-study dentistry received during the course of the study;
• Agree to refrain from eating, using breath mints, using medicated lozenges, chewing gum, brushing their teeth or drinking within 2 hours of the visit, other than small sips of water up to 30 minutes prior to the visit;
• Agree to refrain from drinking tea or mineral water, and/or eating sardines within the 12 hours prior to the study visit; and
• Agree to return for all scheduled visits and to follow all study procedures.

Exclusion Criteria:

• Active treatment for gingivitis, periodontitis, or caries;
• Self-reported pregnancy or nursing;
• Smoking or tobacco chewing;
• Sjögren syndrome or any other disease/condition causing severe xerostomia;
• Kidney disease or renal impairment;
• Undergoing chemotherapy or irradiation procedures;
• Fixed orthodontic appliances that may interfere with product use;
• Inability to undergo any study procedures; or
• Any condition or disease, as determined by the Investigator/Designee that could be expected to interfere with examination procedures or with the subject's safe completion of the study

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Basic Science
• Allocation: Randomized
• Interventional Model: Crossover Assignment
• Masking: Double

Number of Arms

4

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Other: Period 1; 0 ppm F (placebo, negative control), 250 ppm F as MFP (dose-response control), 1100 ppm F as MFP (reference), 2800 ppm F as MFP (dose-response control)	Drug: 0 ppm F; Each subject will be randomly assigned to this treatment during one of the four periods for this crossover study.; Drug: 250 ppm F as MFP; Each subject will be randomly assigned to this treatment during one of the four periods for this crossover study.; Drug: 1100 ppm as MFP; Each subject will be randomly assigned to this treatment during one of the four periods for this crossover study.; Drug: 2800 ppm F as MFP; Each subject will be randomly assigned to this treatment during one of the four periods for this crossover study.
Other: Period 2; 0 ppm F (placebo, negative control), 250 ppm F as MFP (dose-response control), 1100 ppm F as MFP (reference), 2800 ppm F as MFP (dose-response control)	Drug: 0 ppm F; Each subject will be randomly assigned to this treatment during one of the four periods for this crossover study.; Drug: 250 ppm F as MFP; Each subject will be randomly assigned to this treatment during one of the four periods for this crossover study.; Drug: 1100 ppm as MFP; Each subject will be randomly assigned to this treatment during one of the four periods for this crossover study.; Drug: 2800 ppm F as MFP; Each subject will be randomly assigned to this treatment during one of the four periods for this crossover study.
Other: Period 3; 0 ppm F (placebo, negative control), 250 ppm F as MFP (dose-response control), 1100 ppm F as MFP (reference), 2800 ppm F as MFP (dose-response control)	Drug: 0 ppm F; Each subject will be randomly assigned to this treatment during one of the four periods for this crossover study.; Drug: 250 ppm F as MFP; Each subject will be randomly assigned to this treatment during one of the four periods for this crossover study.; Drug: 1100 ppm as MFP; Each subject will be randomly assigned to this treatment during one of the four periods for this crossover study.; Drug: 2800 ppm F as MFP; Each subject will be randomly assigned to this treatment during one of the four periods for this crossover study.
Other: Period 4; 0 ppm F (placebo, negative control), 250 ppm F as MFP (dose-response control), 1100 ppm F as MFP (reference), 2800 ppm F as MFP (dose-response control)	Drug: 0 ppm F; Each subject will be randomly assigned to this treatment during one of the four periods for this crossover study.; Drug: 250 ppm F as MFP; Each subject will be randomly assigned to this treatment during one of the four periods for this crossover study.; Drug: 1100 ppm as MFP; Each subject will be randomly assigned to this treatment during one of the four periods for this crossover study.; Drug: 2800 ppm F as MFP; Each subject will be randomly assigned to this treatment during one of the four periods for this crossover study.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
area under the curve (AUC)	The primary endpoint will be AUC of the fluoride levels from 2 to 30 minutes. AUC will be calculated for each subject and treatment combination by integrating a 3 parameter first order decay model curve estimate (y= theta1 * exp (-theta2.X) + theta3). For any values obtained for a timepoint that are below the detection limit, 0.5 times the detection limit will be used. The following rules will apply if a subject has missing value(s) before the AUC is calculated: If 2 or more timepoints are missing within a period, then the AUC will be set to missing; If only 2-minute data are missing, then curve will be estimated as above; If 6-minute or 12-minute data are missing, a linear imputation between the adjacent timepoints will be used; If 30-minute data are missing, the 12-minute data will be carried forward.	2-minutes, 6-minutes, 12-minutes, and 30-minutes

Collaborators and Investigators

• Sponsor: Procter and Gamble

Study record dates

Study Major Dates

• Study Start (Actual): July 14, 2021
• Primary Completion (Actual): July 29, 2021
• Study Completion (Actual): July 29, 2021

Study Registration Dates

• First Submitted: December 11, 2024
• First Submitted That Met QC Criteria: December 13, 2024
• First Posted (Actual): March 25, 2025

Study Record Updates

• Last Update Posted (Actual): March 25, 2025
• Last Update Submitted That Met QC Criteria: December 13, 2024
• Last Verified: December 1, 2024

More Information

Terms related to this study

• Other Study ID Numbers: 2021061

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No