A Phase 3 interventional study of Silica Free Meridol and Meridol in Gingivitis, sponsored by Colgate Palmolive. Not yet recruiting at 1 site in China. Open to participants aged 18 Years to 70 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-09-25.
Sponsored by Colgate Palmolive · Phase 3, Interventional, and Treatment
The objective of this six-month clinical investigation is to evaluate the efficacy of a silica-free meridol toothpaste versus Colgate Cavity Protection Toothpaste in the control of established dental plaque and gingivitis.
631 studies on the registry are indexed under Gingivitis; 107 are open to participants now.
This study's planned enrollment of 135 is above the median of 66 across 507 interventional studies indexed under Gingivitis.
Browse Gingivitis studies →Colgate Palmolive is the lead sponsor of 119 studies on the registry; 13 are open to participants now.
Of its 36 completed or terminated interventional studies of FDA-regulated products, 2 (6%) have results posted.
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Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Subjects will be instructed to brush their teeth with the assigned teeth dentifrice and toothbrush twice daily.
Drug: Silica Free Meridol
Subjects will be instructed to brush their teeth with the assigned teeth dentifrice and toothbrush twice daily.
Drug: Meridol
Subjects will be instructed to brush their teeth with the assigned teeth dentifrice and toothbrush twice daily.
Drug: Colgate Dental Product
Toothpaste
Toothpaste
MFP fluoride toothpaste
Gingivitis Assessment
A Loe-Silness Gingival Index score from 0 to 3 will be assigned by the examining dentist to all scoreable surfaces of the maxillary and mandibular teeth using a dental light and dental mirror. A whole mouth mean score for each subject will be determined by adding the values given by the examining dentist to each scoreable surface and dividing that number by the total number of surfaces scored. 0 = Absence of inflammation 1. = Mild inflammation - slight change in color and little change in texture 2. = Moderate inflammation - moderate glazing, redness, edema and hypertrophy 3. = Severe inflammation - marked redness and hypertrophy. Tendency for spontaneous bleeding Each tooth is scored on six surfaces: mesio-facial; 2) mid-facial; 3) disto-facial; 4) mesio-lingual; 5) mid-lingual; and 6) disto-lingual. The maximum score per tooth, therefore, is 18.
Time frame: Baseline, 3 month, 6 month
Quigley-Hein Plaque Index
First using a red solution to dye the plaque, a Quigley-Hein Plaque Index score of 0 to 5 will be assigned to all scoreable disclosed surfaces of the maxillary and mandibular teeth using a dental light and dental mirror. A whole mouth score for each subject will be determined by adding the values given by the dental examiner to each scoreable surface and dividing that number by the total number of surfaces scored.
Time frame: Baseline, 3 month, 6 month
Plan to share: No
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From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
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