Clinical Efficacy of Fluoride Toothpastes Using an In Situ Caries Model

August 10, 2015 updated by: GlaxoSmithKline
The purpose of this study is to evaluate the effect of the test toothpaste containing 1150 parts per million (ppm) of fluoride (F) on the mineral content of demineralized enamel specimens, in an in situ caries model system, by comparing the differences in net remineralization change (ΔM) following use of the test toothpaste with a fluoride free (0 ppm F) reference control toothpaste.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Withdrawn

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years to 85 years (ADULT, OLDER_ADULT)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  1. Demonstrates understanding of the study.
  2. Aged 18 to 85 years.
  3. Understands and is willing, able and likely to comply with all study procedures and restrictions.
  4. Has good general health (in the opinion of the investigator or medically qualified designee).
  5. Currently living in the Indianapolis, Indiana area.
  6. Currently wearing a removable mandibular partial denture with sufficient room in the posterior buccal flange area to accommodate two enamel specimens.
  7. Have no current active caries or periodontal disease and all restorations in a good state of repair.
  8. Have a salivary flow rate in the range of normal values.

Exclusion Criteria:

  1. Pregnant or breast feeding women.
  2. Known or suspected intolerance or hypersensitivity to the study materials or their stated ingredients.
  3. Currently taking antibiotics or have taken antibiotics in the two weeks prior to the screening visit.
  4. Unable to measure product weights accurately using the assigned study scale as determined by the study staff as demonstrated.
  5. Participation in another clinical study or receipt of an investigational drug within 30 days of the screening visit.
  6. Have received a professional fluoride treatment within 14 days of randomization to the first treatment.
  7. Recent history (within the last year) of alcohol or other substance abuse.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: TREATMENT
  • Allocation: RANDOMIZED
  • Interventional Model: CROSSOVER
  • Masking: SINGLE

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
EXPERIMENTAL: Test fluoride toothpaste
Participants will apply 1.5 weighed g (± 0.1 g) of the study toothpaste to a wet toothbrush and brush their natural teeth twice daily for one timed minute. Participants will wear their mandibular partial denture with test specimens while brushing and continuously for 24 hours a day during each of the 4-week treatment periods
Drug: Toothpaste containing 1150ppm F
US marketed toothpaste containing 1150ppm of F
Drug: Toothpaste containing 1150ppm F
Experimental toothpaste containing 1150ppm F
PLACEBO_COMPARATOR: Fluoride free (0ppm F) reference control toothpaste
Participants will apply 1.5 weighed g (± 0.1 g) of the study toothpaste to a wet toothbrush and brush their natural teeth twice daily for one timed minute. Participants will wear their mandibular partial denture with test specimens while brushing and continuously for 24 hours a day during each of the 4-week treatment periods.
Other: Toothpaste containing 0ppm F
Experimental toothpaste containing 0ppm F
ACTIVE_COMPARATOR: Low dose fluoride (250ppm F) reference control toothpaste
Participants will apply 1.5 weighed g (± 0.1 g) of the study toothpaste to a wet toothbrush and brush their natural teeth twice daily for one timed minute. Participants will wear their mandibular partial denture with test specimens while brushing and continuously for 24 hours a day during each of the 4-week treatment periods.
Drug: Toothpaste containing 250ppm F
Experimental toothpaste containing 250ppm F
ACTIVE_COMPARATOR: Fluoride (1150ppm F) reference control toothpaste
Participants will apply 1.5 weighed g (± 0.1 g) of the study toothpaste to a wet toothbrush and brush their natural teeth twice daily for one timed minute. Participants will wear their mandibular partial denture with test specimens while brushing and continuously for 24 hours a day during each of the 4-week treatment periods.
Drug: Toothpaste containing 1150ppm F
US marketed toothpaste containing 1150ppm of F
Drug: Toothpaste containing 1150ppm F
Experimental toothpaste containing 1150ppm F

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Net remineralization change (ΔM) of demineralised enamel specimens following use of the test toothpaste with a fluoride free reference control toothpaste
Time Frame: 4 weeks
The change in mineral content (ΔM) of the lesions as measured by Transverse Microradiography (TMR) will be calculated by the following formula: ΔM= (Post-treatment ΔZ - baseline ΔZ)
4 weeks

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Net remineralization change (ΔM) of demineralised enamel specimens following use of the test toothpaste with all other treatments
Time Frame: 4 weeks
The change in mineral content (ΔM) of the lesions as measured by TMR will be calculated by the following formula: ΔM= (Post-treatment ΔZ - baseline ΔZ)
4 weeks
Changes in enamel lesion depth (ΔL) following use of the test toothpaste with all other treatments
Time Frame: 4 weeks
The change in lesion depth (ΔL) as measured by TMR will be calculated by: ΔL= (Post-treatment lesion depth - baseline lesion depth)
4 weeks
Net change in surface zone mineral content (ΔSZmax) following use of the toothpaste with all other treatments
Time Frame: 4 weeks
The change in SZmax (ΔSZmax) as measured by TMR will be calculated by: ΔSZmax= (Post-treatment SZmax - baseline SZmax)
4 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
GlaxoSmithKline

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
December 1, 2015

Primary Completion (ANTICIPATED)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
November 1, 2016

Study Completion (ANTICIPATED)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
November 1, 2016

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
May 4, 2015

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 4, 2015

First Posted (ESTIMATE)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
May 6, 2015

Study Record Updates

Last Update Posted (ESTIMATE)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
August 13, 2015

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 10, 2015

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
August 1, 2015

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 203161

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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