Long-term Release of Fluoride Formed on Enamel by Fluoride Gel or Varnish to Biofilm Fluid

May 7, 2017 updated by: Livia Maria Andaló Tenuta, University of Campinas, Brazil

Retention of Fluoride Formed on Enamel by Fluoride Gel or Varnish Application and Its Release to Dental Biofilm Fluid - in Vivo Study

The anticaries effect of professional fluoride application has been associated with the formation of calcium fluoride-like products ("CaF2") on dental surface, which may function as a slow release fluoride reservoir. Among professional fluoride products, fluoride gel and varnish are the most important, and have different soluble fluoride concentrations, pHs and vehicles. Although the concentration of fluoride formed on enamel after the use of both is similar, the retention of these reaction products is unknown. Also, it is unknown the capacity of these reservoirs to enhance dental biofilm fluid with fluoride. Moreover, the effect of the varnish application time on these parameters is unknown. Therefore, the aim of this study is to compare the capacity of fluoride gel and varnish to form fluoride reservoirs on enamel and increase dental biofilm fluid fluoride concentration with time. Rapid biofilm-forming individuals will be selected to participate and divided into 4 experimental groups: 1. Negative control: no treatment; 2. Varnish 4 hours: fluoride varnish will be applied and kept on teeth for 4 hours; 3. Varnish 24 h: fluoride varnish will be applied on teeth and kept for 24 h; and 4. Gel: Fluoride gel will be applied on teeth. Microbiopsies of enamel will be obtained by a microbiospy technique to assess fluoride concentration before, 7 and 28 days after the treatments. Dental biofilm will be collected before and 3, 7, 14 and 28 days after treatments. Fluoride concentration on enamel and in the biofilm fluid will be determined by an ion-specific electrode. Data will be analyzed statistically comparing the groups and collection times.

Study Overview

Status

Status

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

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

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
62

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.
  • Early Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Brazil
    • Santa Catarina
      • Chapecó, Santa Catarina, Brazil
        • Unochapecó

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 30 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Good general health
  • Good oral health
  • At least 5 teeth in each hemiarch
  • All 4 superior incisors in the mouth
  • Rapid biofilm forming

Exclusion Criteria:

  • Pregnancy
  • Intake of medication that reduces salivary flow
  • Chronic diseases
  • Smokers
  • Orthodontic appliances
  • Dental prosthesis
  • Allergy to fluoride varnish components

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: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

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.
No Intervention: Negative control
No treatment will be applied
Experimental: Varnish 4 h
Fluoride varnish will be applied on teeth and removed after 4 hours
Drug: 5% sodium fluoride varnish
Fluoride varnish containing 22,600 ppm F, as NaF, in a neutral base
Experimental: Varnish 24 h
Fluoride varnish will be applied on teeth and removed after 24 hours
Drug: 5% sodium fluoride varnish
Fluoride varnish containing 22,600 ppm F, as NaF, in a neutral base
Experimental: Fluoride Gel
Fluoride gell will be applied on teeth and removed after 4 minutes
Drug: 1.23% sodium fluoride acidic gel
Fluoride gel containing 12,300 ppm F (as NaF) in an acidic pH (by addition of phosphoric acid)

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
Time Frame
Change in fluoride concentration in enamel days after fluoride application
Time Frame: Up to 28 days
Up to 28 days
Change in fluoride concentration in dental biofilm fluid days after fluoride application
Time Frame: Up to 28 days
Up to 28 days

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
Time Frame
Change in fluoride concentration in whole biofilm days after fluoride application
Time Frame: Up to 28 days
Up to 28 days

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.
University of Campinas, Brazil

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.
April 1, 2015

Primary Completion (Actual)

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.
December 1, 2015

Study Completion (Actual)

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.
December 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 26, 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.
June 26, 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.
July 1, 2015

Study Record Updates

Last Update Posted (Actual)

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.
May 9, 2017

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.
May 7, 2017

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.
May 1, 2017

More Information

Terms related to this study

Keywords

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.
  • FOPBioq005

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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