Investigation of Clinical Efficacy of a New Mouthwash on Reducing Dental Plaque and Helping Prevent Gum Problems as Compared to a Control Mouthwash

May 22, 2026 updated by: Colgate Palmolive

Investigation of Clinical Efficacy of a New Mouthwash on Reducing Dental Plaque and Helping Prevent Gum Problems as Compared to a Control Mouthwash - a Three-month Study in Italy

Qualified subjects will be enrolled and randomized to either one of the two study groups described above based on their initial modified gingivitis and plaque scores. Subjects will be instructed to use the products according to the instructions provided. Subjects will return to the dental office for evaluation after two weeks, six weeks and three months of product use. All subjects will be followed for adverse events throughout the study

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.
80

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.
  • Phase 3

Contacts and Locations

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

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • Italy
    • Rome
      • Roma, Rome, Italy, 00187
        • Clinica Odontoiatrica Montesani

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:

  • Subjects, ages 18-70, inclusive.
  • Availability for the three-month duration of the clinical research study.
  • Good general health.
  • Initial modified gingivitis index of at least 1.5 as determined by the use of the Modified Gingival Index.
  • Initial plaque index of at least 1.5 as determined by the use of the Quigley-Hein Plaque Index.
  • Signed Informed Consent Form (Appendix C)

Exclusion Criteria:

  • Presence of orthodontic bands.
  • Tumor(s) of the soft or hard tissues of the oral cavity.
  • Advanced periodontal disease (purulent exudate, tooth mobility, and/or extensive loss of periodontal attachment or alveolar bone).
  • Five or more carious lesions requiring immediate restorative treatment.
  • Antibiotic use any time during the one-month period prior to entry into the study.
  • Participation in any other clinical study or test panel within the one month prior to entry into the study.
  • Dental prophylaxis during the past two weeks prior to baseline examinations.
  • History of allergies to oral care/personal care consumer products or their ingredients.
  • On any prescription medicines that might interfere with the study outcome.

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: Parallel Assignment
  • Masking: Quadruple

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 1 mouthwash
After brushing in the morning and in the evening, 20 ml of mouthwash shall be used for each rinsing, 2 times daily (morning and evening) for 30 seconds each time. No further rinsing with water shall be occurred after each mouthwash rising. Each qualified subject will follow this specific application for 3 months
Drug: cetylpyridinium chloride (CPC), zinc lactate and sodium fluoride Mouthwash
0.09% CPC, 0.28% zinc lactate and 500 ppm F as sodium fluoride
Active Comparator: Test 2 mouthwash
After brushing either in the morning or in the evening, 20 ml of the mouthwash shall be used for each rinsing, 2 times daily (morning and evening) for 30 seconds each time
Drug: sodium fluoride Mouthwash
100 ppm F as sodium fluoride

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
Modified Gingival Index
Time Frame: baseline, 2 week, 6 week & 3 month
A Modified Gingivitis Index score from 0 to 4 will be assigned by the examiner to all tooth surfaces. In regards to the scale, lower number is a better outcome.
baseline, 2 week, 6 week & 3 month
Saxton Bleeding Index
Time Frame: baseline, 2 week, 6 week & 3 month

Gingival bleeding is assessed 30 seconds after probing; a score of 0 represents an absence of bleeding.

a score of 1 is given if bleeding is observed within 30 seconds after probing and a score of 2 is given if bleeding is observed immediately on probing
baseline, 2 week, 6 week & 3 month
Modified Quigley-Hein Plaque Index
Time Frame: baseline, 2 week, 6 week & 3 month
Modified Quigley-Hein Plaque Index score of 0 to 5 will be assigned to all scoreable disclosed tooth surfaces. In regards to the scale, lower number is a better outcome.
baseline, 2 week, 6 week & 3 month

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.
Colgate Palmolive

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: Luigi Montesani, DDS, University of Rome

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.
December 1, 2025

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.
February 27, 2026

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.
February 27, 2026

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).
November 24, 2025

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.
November 24, 2025

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.
December 4, 2025

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 26, 2026

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 22, 2026

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, 2026

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.
  • CRO-2025-10-PGN-PRG-ITA-YPZ

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

Yes

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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