Evaluation of the Effect of Zinc Citrate Trihydrate Toothpaste on the Oral Plaque Microbiome

April 5, 2024 updated by: Unilever R&D

Evaluation of the Effect of Zinc Citrate Trihydrate Toothpaste on the Oral Plaque Microbiome Over a 12-week Period Compared to a Toothpaste Without Zinc Citrate Trihydrate

This study is of a double-blind, randomised, parallel group study. Subjects will be enrolled onto the study according to the inclusion/exclusion criteria. After recruitment, subjects will be given a fluoride toothpaste without gum care agents to use for the 4-week run-in period prior to the commencement of the test phase of the study. Following the run-in period, baseline supragingival plaque samples will be collected 12 hours after last brushing, from the upper and lower jaws separately. Subjects will then then randomly allocated to one of two products (zinc citrate trihydrate [ZCT] toothpaste or control toothpaste) according to the randomization. Subjects will be instructed to use the toothpaste at home, brushing twice a day for 12-weeks. Supragingival plaque samples will be collected again from the upper and lower jaws after 2, 6 and 12 weeks. Plaque samples will then undergo metataxonomic and metatranscriptomic analyses.

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.

Detailed Description

This study is a double-blind, randomized, parallel group study and will be conducted by an independent clinical research organisation. Subjects will be enrolled onto the study according to the inclusion/exclusion criteria. After recruitment, subjects will be given a fluoride toothpaste without gum care agents to use for the 4-week run-in period prior to the commencement of the test phase of the study. This phase of the study is to ensure that all subjects are standardized to a fluoride only toothpaste. Following the run-in period, baseline supragingival plaque samples will be collected 12 hours after last brushing, from the upper and lower jaws separately, for metataxonomic and metatranscriptomic analysis respectively. Subjects will be randomly allocated to one of two products (zinc citrate trihydrate toothpaste/control toothpaste) according to the randomization schedule generated using Proc Plan procedure in SAS 9.4 suitable for 2-group parallel design study. Subjects will be instructed to use the toothpaste at home, brushing twice a day for 12-weeks. Supragingival plaque samples will be collected again from the upper and lower jaws after 2, 6 and 12 weeks. Samples are to be collected by a single clinician across the study to ensure consistency in sample collection. (Note: The study clinician could not collect samples at week 12 because of sickness. Different clinicians collected the samples instead. Data analysis showed that the week 12 samples did not match the week 0, 2 and 6 samples [higher levels of DNA indicative of different sample collection] and hence they were excluded from the analysis).

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.
142

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

  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • Healthy, adult, male/female volunteers
  • Aged between 18 and 65 years old
  • Willing to sign an informed consent and complete a medical history questionnaire
  • Have at least 20 natural teeth including 5 teeth (excluding 3rd molars) in each quadrant
  • Must be available for the duration of the study

Exclusion Criteria:

  • The subject is an employee of Unilever or the site conducting the study
  • Subjects taking part in other oral care studies for the Sponsor or any other company
  • Smokers (including eCigarettes) or those who have smoked in the preceding 12 months.
  • Subjects showing unwillingness, inability or lack of motivation to carry out the study procedures
  • Subjects who are pregnant or nursing
  • Subjects who have used mouthwashes within the 4 weeks prior to the start of the study.
  • Subjects with a Modified Gingival Index score of 3 at screening
  • Diabetics
  • Subjects showing signs of early or untreated caries or significant periodontal disease, which in the opinion of the Study Dentist, would affect either the scientific validity of the study or, if the subject was to participate in the study, would affect their wellbeing.
  • Subjects who have full or partial dentures or any oral piercings
  • Subjects who have an active oral herpetic lesion or regularly suffer with oral herpetic lesions
  • Subjects who regularly use medication or food supplements (including supplements which contain Zinc) in the 4 weeks prior to the start of the study, or during the study
  • Subjects who have or have had a medical or oral condition which in the opinion of the study dentist would make them unsuitable for inclusion
  • Known allergies to the toothpaste ingredients or to any dental materials
  • Taking a course of antimicrobial medication within 4 weeks of screening or during the study
  • Long term use of anti-inflammatory and/or antihistamine drugs. Intermittent use is permitted apart from 24 hours prior to the assessments

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: Other
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

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: ZCT toothpaste
Brush with zinc citrate trihydrate toothpaste twice per day, morning and evening, for 12 weeks
Other: ZCT toothpaste
Placebo Comparator: Control toothpaste
Brush with control toothpaste twice per day, morning and evening, for 12 weeks.
Other: Control toothpaste

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
Plaque microbiome
Time Frame: 6 weeks
Speciation of plaque bacteria
6 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.
Unilever R&D

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Intertek

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Robert Maclure, BDS, Intertek CRS

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 (Actual)

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.
January 10, 2017

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.
May 19, 2017

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.
May 19, 2017

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).
April 5, 2024

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.
April 5, 2024

First Posted (Actual)

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.
April 11, 2024

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.
April 11, 2024

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.
April 5, 2024

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.
March 1, 2023

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.
  • ORL-GUM-2787

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

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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