Efficacy of Potassium Nitrate Solution in Reducing Dentinal Hypersensitivity

January 22, 2015 updated by: GlaxoSmithKline

A Proof of Principle Study Investigating the Effects of a Potassium Nitrate Solution in Reducing Dentinal Hypersensitivity

An exploratory study investigating the direct application of potassium nitrate (KNO3) solutions of different concentrations in reducing dentine hypersensitivity.

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.
32

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 2

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 States
    • Indiana
      • Fort Wayne, Indiana, United States, 46825
        • University Park Research Center (UPRC)

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

18 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Self-reported history of dentinal hypersensitivity lasting more than 6 months and a primary complaint of sensitive teeth
  • Three teeth that can be isolated that meet all of the following criteria at the screening visit:
  • Teeth showing signs of facial/cervical gingival recession and/or signs of erosion or abrasion. Study teeth must exhibit greater than or equal to 3 mm recession at the facial surface midpoint
  • Teeth must be visually stain and calculus free
  • Teeth having a gingival index score of less than or equal to 2
  • Teeth with a clinical mobility less than or equal to 1
  • Teeth that show signs of sensitivity, evaporative (air) sensitive teeth displaying a response of greater than or equal to 30 mm on a 100 mm VAS

Exclusion Criteria:

  • Chronic disease or other condition that is associated with intermittent episodes of constant daily pain, such as arthritis, low back pain, etc.
  • An condition or medication that causes xerostomia as determined by investigator
  • Sensitive teeth not expected to respond to treatment with an over-the-counter dentifrice in the opinion of the investigator
  • Teeth with exposed dentine but with deep, defective or facial restorations
  • Teeth used as abutments for fixed or removable partial dentures
  • Teeth with full crowns, orthodontic bands, extensive caries or cracked enamel
  • Sensitive teeth with contributing etiologies other than erosion, abrasion or recession of exposed dentine.
  • Dental prophylaxis within 3 weeks of the screening visit
  • Tongue or lip piercing or presence of dental implants
  • Subjects not using the same brand of toothpaste for at least 4 months prior to the screening visit
  • Subjects who have used desensitizing toothpaste during the 4 weeks before Treatment Visit 1
  • Taking daily dose of medication which may interfere with the perception of pain. Examples of such medications include analgesics, anticonvulsants, antihistamines that cause marked or moderate sedation, sedatives, tranquillizers, mood-altering drugs or anti-inflammatory drugs

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: Double

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: 5% KNO3 solution
Participants to apply 5% potassium nitrate solution to a single sensitive tooth for two minutes, in each of the five day treatment period.
Drug: 5% Potassium nitrate
5% potassium nitrate solution
Experimental: 2.5% KNO3 solution
Participants to apply 2.5% potassium nitrate solution to a single sensitive tooth for two minutes, in each of the five day treatment period.
Drug: 5% Potassium nitrate
5% potassium nitrate solution
Drug: 2.5% Potassium nitrate
2.5% potassium nitrate solution
Placebo Comparator: Sterile Water
Participants to apply sterile water to a single sensitive tooth for two minutes, in each of the five day treatment period.
Other: Sterile water
Sterile water

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
Between Treatment Comparison of the Adjusted Mean Change From Baseline of Response to Evaporative (Air) Stimuli Immediately Following Treatment on Day 5 Using a Visual Analog Scale (VAS) in 5% Potassium Nitrate Solution and 2.5% Potassium Nitrate Solution
Time Frame: Baseline and immediately after treatment on Day 5
Response to a one second application of air from a standard dental unit syringe applied to the surface of hypersensitive tooth. After each stimuli participant rated the intensity of pain on a 100 millimeter VAS, on which 0 represented "no pain" and 100 represented the" worst pain imaginable". Change from baseline was calculated as mean score at the given time point minus mean score at baseline.
Baseline and immediately after treatment on Day 5

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
Between Treatment Comparison of the Adjusted Mean Change From Baseline of Response to Evaporative (Air) Stimuli Immediately Following Treatment on Day 1 Using a VAS
Time Frame: Baseline and immediately after treatment on Day 1
Response to a one second application of air from a standard dental unit syringe applied to the surface of hypersensitive tooth. After each stimuli participant rated the intensity of pain on a 100 millimeter VAS, on which 0 represented "no pain" and 100 represented the" worst pain imaginable". Change from baseline was calculated as mean score at the given time point minus mean score at baseline.
Baseline and immediately after treatment on Day 1
Between Treatment Comparison of the Adjusted Mean Change From Baseline of Response to Evaporative (Air) Stimuli at 10 Mins Post Treatment on Day 1 Using a VAS
Time Frame: Baseline and 10 mins post treatment on Day 1
Response to a one second application of air from a standard dental unit syringe applied to the surface of hypersensitive tooth. After each stimuli participant rated the intensity of pain on a 100 millimeter VAS, on which 0 represented "no pain" and 100 represented the" worst pain imaginable". Change from baseline was calculated as mean score at the given time point minus mean score at baseline.
Baseline and 10 mins post treatment on Day 1
Between Treatment Comparison of the Adjusted Mean Change From Baseline of Response to Evaporative (Air) Stimuli at 20 Mins Post Treatment on Day 1 Using a VAS.
Time Frame: Baseline and 20 mins post treatment on Day 1
Response to a one second application of air from a standard dental unit syringe applied to the surface of hypersensitive tooth. After each stimuli participant rated the intensity of pain on a 100 millimeter VAS, on which 0 represented "no pain" and 100 represented the" worst pain imaginable". Change from baseline was calculated as mean score at the given time point minus mean score at baseline.
Baseline and 20 mins post treatment on Day 1
Between Treatment Comparison of the Adjusted Mean Change From Baseline of Response to Evaporative (Air) Stimuli Following Treatment on Day 2 Using a VAS
Time Frame: Baseline and immediately after treatment on Day 2
Response to a one second application of air from a standard dental unit syringe applied to the surface of hypersensitive tooth. After each stimuli participant rated the intensity of pain on a 100 millimeter VAS, on which 0 represented "no pain" and 100 represented the" worst pain imaginable". Change from baseline was calculated as mean score at the given time point minus mean score at baseline.
Baseline and immediately after treatment on Day 2
Between Treatment Comparison of the Adjusted Mean Change From Baseline of Response to Evaporative (Air) Stimuli at 10 Mins Post Treatment on Day 2 Using a VAS
Time Frame: Baseline and 10 mins post treatment on Day 2
Response to a one second application of air from a standard dental unit syringe applied to the surface of hypersensitive tooth. After each stimuli participant rated the intensity of pain on a 100 millimeter VAS, on which 0 represented "no pain" and 100 represented the" worst pain imaginable". Change from baseline was calculated as mean score at the given time point minus mean score at baseline.
Baseline and 10 mins post treatment on Day 2
Between Treatment Comparison of the Adjusted Mean Change From Baseline of Response to Evaporative (Air) Stimuli at 20 Mins Post Treatment on Day 2 Using a VAS
Time Frame: Baseline and 20 mins post treatment on Day 2
Response to a one second application of air from a standard dental unit syringe applied to the surface of hypersensitive tooth. After each stimuli participant rated the intensity of pain on a 100 millimeter VAS, on which 0 represented "no pain" and 100 represented the" worst pain imaginable". Change from baseline was calculated as mean score at the given time point minus mean score at baseline.
Baseline and 20 mins post treatment on Day 2
Between Treatment Comparison of the Adjusted Mean Change From Baseline of Response to Evaporative (Air) Stimuli Immediately Following Treatment on Day 3 Using a VAS
Time Frame: Baseline and immediately after treatment on Day 3
Response to a one second application of air from a standard dental unit syringe applied to the surface of hypersensitive tooth. After each stimuli participant rated the intensity of pain on a 100 millimeter VAS, on which 0 represented "no pain" and 100 represented the" worst pain imaginable". Change from baseline was calculated as mean score at the given time point minus mean score at baseline.
Baseline and immediately after treatment on Day 3
Between Treatment Comparison of the Adjusted Mean Change From Baseline of Response to Evaporative (Air) Stimuli at 10 Mins Post Treatment on Day 3 Using a VAS
Time Frame: Baseline and 10 mins post treatment on Day 3
Response to a one second application of air from a standard dental unit syringe applied to the surface of hypersensitive tooth. After each stimuli participant rated the intensity of pain on a 100 millimeter VAS, on which 0 represented "no pain" and 100 represented the" worst pain imaginable". Change from baseline was calculated as mean score at the given time point minus mean score at baseline.
Baseline and 10 mins post treatment on Day 3
Between Treatment Comparison of the Adjusted Mean Change From Baseline of Response to Evaporative (Air) Stimuli at 20 Mins Post Treatment on Day 3 Using a VAS
Time Frame: Baseline and 20 mins post treatment on Day 3
Response to a one second application of air from a standard dental unit syringe applied to the surface of hypersensitive tooth. After each stimuli participant rated the intensity of pain on a 100 millimeter VAS, on which 0 represented "no pain" and 100 represented the" worst pain imaginable". Change from baseline was calculated as mean score at the given time point minus mean score at baseline.
Baseline and 20 mins post treatment on Day 3
Between Treatment Comparison of the Adjusted Mean Change From Baseline of Response to Evaporative (Air) Stimuli Following Treatment on Day 4 Using a VAS
Time Frame: Baseline and immediately after treatment on Day 4
Response to a one second application of air from a standard dental unit syringe applied to the surface of hypersensitive tooth. After each stimuli participant rated the intensity of pain on a 100 millimeter VAS, on which 0 represented "no pain" and 100 represented the" worst pain imaginable". Change from baseline was calculated as mean score at the given time point minus mean score at baseline.
Baseline and immediately after treatment on Day 4
Between Treatment Comparison of the Adjusted Mean Change From Baseline of Response to Evaporative (Air) Stimuli at 10 Mins Post Treatment on Day 4 Using a VAS
Time Frame: Baseline and 10 mins post treatment on Day 4
Response to a one second application of air from a standard dental unit syringe applied to the surface of hypersensitive tooth. After each stimuli participant rated the intensity of pain on a 100 millimeter VAS, on which 0 represented "no pain" and 100 represented the" worst pain imaginable". Change from baseline was calculated as mean score at the given time point minus mean score at baseline.
Baseline and 10 mins post treatment on Day 4
Between Treatment Comparison of the Adjusted Mean Change From Baseline of Response to Evaporative (Air) Stimuli 20 Mins Post Treatment on Day 4 Using a VAS
Time Frame: Baseline and 20 mins post treatment on Day 4
Response to a one second application of air from a standard dental unit syringe applied to the surface of hypersensitive tooth. After each stimuli participant rated the intensity of pain on a 100 millimeter VAS, on which 0 represented "no pain" and 100 represented the" worst pain imaginable". Change from baseline was calculated as mean score at the given time point minus mean score at baseline.
Baseline and 20 mins post treatment on Day 4
Between Treatment Comparison of the Adjusted Mean Change From Baseline of Response to Evaporative (Air) Stimuli Immediately Following Treatment on Day 5 Using a VAS in 5% Potassium Nitrate Solution and Water; 2.5% Potassiun Nitrate Solution and Water
Time Frame: Baseline and immediately after treatment on Day 5
Response to a one second application of air from a standard dental unit syringe applied to the surface of hypersensitive tooth. After each stimuli participant rated the intensity of pain on a 100 millimeter VAS, on which 0 represented "no pain" and 100 represented the" worst pain imaginable". Change from baseline was calculated as mean score at the given time point minus mean score at baseline.
Baseline and immediately after treatment on Day 5
Between Treatment Comparison of the Adjusted Mean Change From Baseline of Response to Evaporative (Air) Stimuli at 10 Mins Post Treatment on Day 5 Using a VAS
Time Frame: Baseline and 10 mins post treatment on Day 5
Response to a one second application of air from a standard dental unit syringe applied to the surface of hypersensitive tooth. After each stimuli participant rated the intensity of pain on a 100 millimeter VAS, on which 0 represented "no pain" and 100 represented the" worst pain imaginable". Change from baseline was calculated as mean score at the given time point minus mean score at baseline.
Baseline and 10 mins post treatment on Day 5
Between Treatment Comparison of the Adjusted Mean Change From Baseline of Response to Evaporative (Air) Stimuli at 20 Mins Post Treatment on Day 5 Using a VAS
Time Frame: Baseline and 20 mins post treatment on Day 5
Response to a one second application of air from a standard dental unit syringe applied to the surface of hypersensitive tooth. After each stimuli participant rated the intensity of pain on a 100 millimeter VAS, on which 0 represented "no pain" and 100 represented the" worst pain imaginable". Change from baseline was calculated as mean score at the given time point minus mean score at baseline.
Baseline and 20 mins post treatment on Day 5

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.
GlaxoSmithKline

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

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.
September 1, 2009

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.
October 1, 2009

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.
October 1, 2009

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 30, 2010

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 30, 2010

First Posted (Estimate)

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.
May 4, 2010

Study Record Updates

Last Update Posted (Estimate)

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.
January 26, 2015

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.
January 22, 2015

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.
January 1, 2015

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.
  • Z3770633

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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