Study to Investigate the Effect of Changes in Dentinal Hypersensitivity on Oral Health Parameters

August 12, 2026 updated by: HALEON
This exploratory study will investigate the effect of long-term management of Dentine Hypersensitivity (DH) by use of a sensitivity toothpaste on selected oral health parameters, such as changes in oral hygiene (as measured by supra-gingival plaque accumulation), with associated changes in gingival health.

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 is a single center, non-comparative design study to investigate the effect of long-term management of DH by use of a sensitivity toothpaste on selected oral health parameters, such as changes in oral hygiene, with associated changes in gingival health. Sufficient participants will be screened to ensure approximately 70 eligible participants get allocated the study toothpaste in order to ensure that approximately 60 participants complete the study.

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.
75

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

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

  • United Kingdom
    • Cheshire
      • Ellesmere Port, Cheshire, United Kingdom, CH65 4BW
        • Intertek CRS Ltd

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:

  • 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.
  • Understands and is willing, able and likely to comply with all study procedures and restrictions.

  • Good general and mental health with, in the opinion of the investigator,

    1. No clinically significant or relevant abnormalities of medical history or oral examination which could impact study outcomes.
    2. The absence of any condition that would impact on the participant's safety or wellbeing or affect the individual's ability to understand and follow study procedures and requirements.
  • At screening, self-reported history of DH lasting more than 6 months but not more than 10 years.

  • At screening, minimum of two accessible teeth (incisors, canines or pre-molars) that meet all of the following criteria:

    1. Tooth with signs of erosion, abrasion and/or facial/cervical gingival recession (EAR).
    2. Tooth with signs of sensitivity measured by qualifying evaporative (air) assessment.

  • At Baseline, minimum of two accessible teeth (incisors, canines or pre-molars), that meet the following criteria:

    1. Tooth with signs of sensitivity, measured by qualifying tactile stimulus (Yeaple less than or equal to [<=] 20 gram) and evaporative (air) assessment (Schiff Sensitivity Score greater than or equal to [>=] 2)

Exclusion Criteria:

  • Women who are known to be pregnant or who are intending to become pregnant over the duration of the study.
  • Women who are breast-feeding.
  • Known or suspected intolerance or hypersensitivity to the study materials (or closely related compounds) or any of their stated ingredients.

  • Clinical Study/Experimental Medication

    1. Participation in another clinical study or receipt of an investigational drug within 30 days prior to the screening visit.
    2. Participation in a tooth desensitizing treatment study within 8 weeks of the screening visit.
    3. Previous participation in this study.
  • Recent history (within the last year) of alcohol or other substance abuse.
  • An employee of the sponsor or the study site or members of their immediate family.

  • Disease

    1. Presence of chronic debilitating disease which, in the opinion of the investigator, could affect study outcomes.
    2. Any condition which, in the opinion of the investigator, is causing xerostomia.

  • General Dentition Exclusions

    1. Dental prophylaxis within 4 weeks of screening.
    2. Tongue or lip piercing
    3. Desensitizing treatment within 8 weeks of screening (professional sensitivity treatments and non-dentifrice sensitivity treatments).
    4. Treatment of periodontal disease (including surgery) within 12 months of screening, scaling or root planing within 3 months of screening.
    5. Teeth bleaching within 8 weeks of screening.
    6. Current active caries or periodontitis which, in the opinion of the investigator, could affect study outcomes, or the health of the subject if they participate in the study.
    7. Partial dentures, orthodontic appliances or dental implants which, in the opinion of the investigator, could affect study outcomes.
    8. Restorations in a poor state of repair which, in the opinion of the investigator, could affect study outcomes.

  • Specific Dentition Exclusions for Teeth Selected for Sensitivity Assessments

    1. Tooth with evidence of current or recent caries or reported treatment of decay in 12 months of screening.
    2. Tooth with exposed dentine but with deep, defective or facial restorations, teeth used as abutments for fixed or removable partial dentures, teeth with full crowns or veneers, orthodontic bands or cracked enamel. Sensitive teeth with contributing aetiologies other than erosion, abrasion or recession of exposed dentine.
    3. Sensitive tooth not expected, in the opinion of the investigator, to respond to treatment with an over-the-counter toothpaste.
  • Use of a sensitivity oral care product within 8 weeks of screening.
  • Any participants who, in the opinion of the investigator, should not participate in the study, use of medication which could interfere in the outcome of the study or require antibiotic prophylaxis for dental procedures.

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: N/A
  • Interventional Model: Single Group Assignment
  • Masking: Single

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 Toothpaste
Participants will brush with the test toothpaste using a manual toothbrush for 1 timed minute twice daily (morning and evening) for 24 weeks.
Other: Test Toothpaste
Marketed toothpaste containing 5 percent (%) weight by weight (w/w) NovaMin / 1426 parts per million (ppm) fluoride as sodium monofluorophosphate (SMFP)

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
Change From Baseline in Schiff Sensitivity Score
Time Frame: Baseline and up to Week 24
Evaporative (air) sensitivity will be assessed by the participant's response to an evaporative (air) stimulus administered by the clinical examiner. Participant response will be evaluated immediately following application of the stimulus using the Schiff sensitivity scale (0= Participant does not respond to air stimulation, 1= Participant responds to air stimulus but does not request discontinuation of stimulus, 2= Participant responds to air stimulus and requests discontinuation or moves from stimulus, 3= Participant responds to stimulus, considers stimulus to be painful, and requests discontinuation of stimulus). A decrease in Schiff sensitivity score indicates improvement. Change from Baseline will be calculated by subtracting Baseline score from the score at the indicated timepoints.
Baseline and up to Week 24
Change From Baseline in Tactile Threshold
Time Frame: Baseline and up to Week 24
Tactile sensitivity will be assessed by the participant's response to a tactile stimulus administered by the clinical examiner using a constant pressure probe (Yeaple probe). After each application of the stimulus, the participant will be asked to indicate whether they experienced any pain or discomfort (yes/no response). The pressure setting with two consecutive 'yes' responses will be recorded as the tactile threshold in gram. An increase in tactile threshold (gram) indicates improvement. Change from Baseline will be calculated by subtracting Baseline value from the value at the indicated timepoints.
Baseline and up to Week 24
Change From Baseline in Labelled Magnitude Scales (LMS) Score
Time Frame: Baseline and up to Week 24
The tooth sensitivity questionnaire will be used to describe the overall tooth sensitivity experienced by the participant. Participants will indicate whether they have felt tooth sensitivity during the previous 24 hours. Participants who indicate they did feel tooth sensitivity will complete the remainder of the questionnaire and rate the intensity, duration, tolerability and descriptive quality of their tooth sensitivity using the four individual 100 millimeter (mm) LMS. Participants will mark each scale to indicate the best description of their sensitivity and the marked-off line segment will be measured in 'mm'. Lower scores indicate an improvement in sensitivity. Change from Baseline will be calculated by subtracting Baseline score from the score at the indicated timepoints.
Baseline and up to Week 24

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
Measure Description
Time Frame
Change From Baseline in Turesky Plaque Index (TPI)
Time Frame: Baseline and up to Week 24
TPI will be used to assess plaque on all gradable teeth. The plaque will first be disclosed using a plaque disclosing dye solution. The TPI will be assessed on the facial and lingual surfaces of each scorable tooth. Three scores will be recorded buccally/labially and three scores lingually/palatally. Disclosed plaque will be scored on a scale ranging from 0-6, where 0= No plaque, 1= Slight flecks of plaque at the cervical margin of the tooth, 2= Thin continuous band of plaque (up to 1 mm) at the cervical margin of the tooth, 3= Band of plaque wider than 1 mm but covering less than (<)1/3 of the area, 4= Plaque covering at least 1/3 but less than 2/3 of the area, 5= Plaque covering 2/3 or more of the crown of the tooth. Lower score indicates improvement in the symptoms. Change from Baseline will be calculated by subtracting the Baseline score from the score at the indicated timepoints.
Baseline and up to Week 24
Change From Baseline in Modified Gingival Index [MGI]
Time Frame: Baseline and up to Week 24
The MGI assessment is a non-invasive evaluation which focuses on the visual symptoms of gingivitis. It will be assessed on the facial and lingual surfaces of each scorable tooth using a 5-point scale ranging from 0 to 4, where 0= absence of inflammation 1= mild inflammation; slight change in color, little change in color; little change in texture of any portion of the marginal or papillary gingival unit. 2= mild inflammation; criteria as above but involving the entire marginal or papillary gingival unit. 3= moderate inflammation; glazing, redness, oedema, and/or hypertrophy of the marginal or papillary gingival unit. 4= severe inflammation; marked redness, oedema and/or hypertrophy of the marginal or papillary gingival unit, spontaneous bleeding, congestion, or ulceration. Lower score indicates improvement in the symptoms. Change from Baseline will be calculated by subtracting the Baseline score from the score at the indicated timepoints.
Baseline and up to Week 24
Change From Baseline in Dentine Hypersensitivity Experience Questionnaire (DHEQ) Total Score
Time Frame: Baseline and up to Week 24
The DHEQ is used to measure how DH affects participants quality of life. Section 2 has 34 questions in grouped into 5 domains (Restrictions, Adaptation, Social Impact, Emotional Impact, and Identity). Participants will score each question using a 7-point scale ranging from 1 to 7, where 1= strongly disagree, 2= disagree, 3= disagree a little, 4= neither agree nor disagree, 5= agree a little, 6= agree, and 7= strongly agree. The total score will be derived from the sum of scores across all domains and it ranges from 34 to 238. A lower score indicates a better quality of life regarding DH. Change from Baseline will be calculated by subtracting the Baseline score from the score at the indicated timepoints.
Baseline and up to Week 24

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.
HALEON

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.
August 27, 2013

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.
March 4, 2014

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.
March 4, 2014

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).
August 12, 2026

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.
August 12, 2026

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.
August 17, 2026

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.
August 17, 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.
August 12, 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.
August 1, 2026

More Information

Terms related to this study

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.
  • RH01897

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

Anonymized individual participant data and study documents can be requested for further research from ww.clinical-trial-register@haleon.com

IPD Sharing Time Frame

IPD will be made available within 6 months of publishing the results of the primary endpoints, key secondary endpoints and safety data of the study.

IPD Sharing Access Criteria

Access is provided after a research proposal is submitted and has received approval from the Independent Review Panel and after a Data Sharing Agreement is in place. Access is provided for an initial period of 12 months, but an extension can be granted, when justified, for up to another 12 months.

IPD Sharing Supporting Information Type

  • STUDY_PROTOCOL

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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