- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00752089
Experimental Dentifrice Remineralization/Fluoride Uptake in an in Situ Model
October 17, 2016 updated by: GlaxoSmithKline
Exploratory Evaluation of an Experimental Fluoride Dentifrice Formulation Using an in Situ Remineralization/Fluoride Uptake Model
The purpose of this study is to determine whether an experimental fluoridated dentifrice is effective in the treatment of dental caries
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Detailed Description
Topical fluorides have been proven to be clinically effective in the prevention of dental caries.
It is generally agreed that anti-caries effect of fluoride (F) is mainly by decreasing the rate of enamel demineralization and enhancing the rate of enamel remineralization.
An in-situ Surface Micro-hardness (SMH) test is widely used to evaluate enamel demineralization and remineralization during the caries process.
Determination of fluoride uptake in-situ also provides better estimation of true fluoride bioavailability of fluoride dentifrice products.
In this study, an in-situ remineralization fluoride uptake model will be used to compare the efficacy of experimental dentifrice with a marketed dentifrice and placebo dentifrice.
Participants wore partial dentures containing two partially demineralized enamel specimens for two weeks- 24 hours per day, except when brushing (twice daily) with test dentifrice.
Following each treatment period, the enamel specimens were analyzed for SMH recovery and fluoride uptake through microdrill enamel biopsy technique.
Study Type
Interventional
Enrollment (Actual)
20
Phase
- Phase 2
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
Ages Eligible for Study
18 years to 78 years (ADULT, OLDER_ADULT)
Accepts Healthy Volunteers
Yes
Genders Eligible for Study
All
Description
Inclusion Criteria:
- Age: Aged between 18 and 78
- Fluoride: Currently living in the Indianapolis area which has a fluoridated water supply (1 ppm F) and not taking fluoride supplements for medical reasons
- Dentures: Currently wearing a removable mandibular partial denture with sufficient room in the posterior buccal flange area to accommodate two enamel specimens (required dimensions 12 x 7 mm). Willing and capable of wearing their removable partial dentures 24 hours per day during the experimental periods
- Dental health:Have no current active caries or periodontal disease that may compromise the study or the health of the participants and all restorations in a good state of repair
- Salivary flow:Have a salivary flow rate in the range of normal values (unstimulated whole saliva flow rate ≥ 0.2 mL/min; gum base stimulated whole saliva flow rate ≥ 0.8 mL/min
- Compliance: Understands and is willing, able and likely to comply with all study procedures and restrictions
- Consent:Demonstrates understanding of the study and willingness to participate as evidenced by voluntary written informed consent and has received a signed and dated copy of the informed consent form
- General Health: Good general health with (in the opinion of the investigator) no clinically significant and/or relevant abnormalities of medical history or oral examination that could interfere with participant safety during the study period
Exclusion Criteria:
- Antibiotics:Currently taking antibiotics or have taken antibiotics in the two weeks prior to the screening visit
- Allergy/Intolerance:Known or suspected intolerance or hypersensitivity to the study materials (or closely related compounds) or any of their stated ingredients
- Pregnancy:Women who are known to be pregnant or who are intending to become pregnant over the duration of the study.
- Breast-feeding:Women who are breast-feeding.
- Clinical Study/Experimental Medication: Participation in another clinical study or receipt of an investigational drug within 30 days of the screening visit
- Personnel:An employee of the sponsor or the study site who is directly involved in the study
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 |
Intervention / Treatment |
---|---|
EXPERIMENTAL: Sodium fluoride/potassium nitrate/Isopentane dentifrice
Participants to brush their teeth for one timed minute twice daily with a gel to foam dentifrice containing active ingredients: 1450 ppm F as sodium fluoride (NaF) and 5% potassium nitrate (KNO3) and isopentane as an excipient ingredient.
|
Experimental toothpaste
|
EXPERIMENTAL: NaF/KNO3 Dentifrice
Participants to brush their teeth for one timed minute twice daily with a gel to foam dentifrice, containing as active ingredients: 1450 ppm NaF and 5% KNO3 but no isopentane.
|
Experimental toothpaste
|
ACTIVE_COMPARATOR: NaF Dentifrice
Participants to brush their teeth for one timed minute twice daily with a dentifrice containing 1450 ppm F as NaF.
|
Active comparator
|
PLACEBO_COMPARATOR: Placebo Dentifrice
Participants to brush their teeth for one timed minute twice daily with a fluoride free dentifrice (0 ppm F).
|
Placebo comparator
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Percentage Surface Micro-hardness Recovery (SMHR) of Enamel Specimens
Time Frame: Baseline to 14 days
|
SMH test was used to assess mineralization status of enamel specimens using a Wilson 2100 Hardness tester.
SMH was determined by measuring the length of the indentations of enamel specimens.
An increase in the indentation length compared to the baseline indicates softening while decrease in the indentation length represents re-hardening of enamel surface.
Percent SMHR was calculated from indentation values of enamel specimens at baseline (B), after intra-oral exposure (R) and after in-vitro demineralization (D) using formula: [(D-R)/ (D-B)]*100.
|
Baseline to 14 days
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Adjusted Mean Change From Baseline in Enamel Fluoride Uptake
Time Frame: Baseline to 14 days
|
Enamel fluoride uptake was determined using the microdrill enamel biopsy technique.
The amount of fluoride uptake by enamel was calculated based on the amount of fluoride (F) divided by the area of the enamel cores and expressed as ug*F/cm^3.
The difference between treatments was calculated with respect to fluoride uptake by enamel.
|
Baseline to 14 days
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
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
September 1, 2007
Primary Completion (ACTUAL)
January 1, 2008
Study Completion (ACTUAL)
January 1, 2008
Study Registration Dates
First Submitted
September 11, 2008
First Submitted That Met QC Criteria
September 12, 2008
First Posted (ESTIMATE)
September 15, 2008
Study Record Updates
Last Update Posted (ESTIMATE)
December 8, 2016
Last Update Submitted That Met QC Criteria
October 17, 2016
Last Verified
May 1, 2016
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- Z3120510
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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