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Evaluation of the Safety and Efficacy of an Oxalate Gel or Negative Control on Dentinal Hypersensitivity

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT02189382
Recruitment Status : Completed
First Posted : July 14, 2014
Results First Posted : August 20, 2018
Last Update Posted : August 20, 2018
Information provided by (Responsible Party):
Procter and Gamble

Brief Summary:
This study will compare the safety and effectiveness of a potassium oxalate desensitizer or negative control on dentinal hypersensitivity.

Condition or disease Intervention/treatment Phase
Dentin Sensitivity Device: Potassium Oxalate Other: Water Not Applicable

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 70 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Participant)
Primary Purpose: Treatment
Study Start Date : June 2014
Actual Primary Completion Date : July 2014
Actual Study Completion Date : July 2014

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Allergy Potassium

Arm Intervention/treatment
Experimental: Potassium Oxalate Gel
Self Applied
Device: Potassium Oxalate
Self Applied
Other: Water

Primary Outcome Measures :
  1. Change From Baseline Air Challenge [ Time Frame: 30 days ]
    The Schiff Sensitivity Scale was assessed for each test tooth via an evaporative air challenge. The examiner recorded the Schiff Index score corresponding to the response to the air challenge. The Schiff Index Sensitivity scale is scored as follows- 0: tooth/subject did not respond to stimulus, 1: tooth/subject responds to stimulus, but does not request discontinuation of stimulus, 2: tooth/subject responds to stimulus and requests discontinuation or moves form stimulus, 3: tooth/subject responds to stimulus, considers stimulus to be painful, and requests discontinuation of the stimulus. The higher the Schiff score, the more sensitive the tooth. The mean change from Baseline was calculated for this measure.

Secondary Outcome Measures :
  1. Change From Baseline in Tactile Threshold [ Time Frame: 30 days ]
    Tactile Threshold was measured using a Yeaple probe. Testing was performed beginning at 10 g. The examiner recorded tactile scores for responding teeth. After treatment, testing began at 10 g and increase by 10 g to a maximum of 50 g. The higher the tactile threshold, the less sensitive the tooth. Each successive challenge increased until a "yes" response was repeated. If a second "yes" was not obtained, the force setting was increased to the next step and continued until a force was found which elicited two consecutive "yes" responses and was recorded as the threshold on the Tactile Sensitivity Score form. The mean change from Baseline was calculated for this measure.

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • be at least 18 years of age;
  • provide written informed consent prior to participation and be given a signed copy of the informed consent form;
  • complete a confidentiality disclosure agreement;
  • be in good general health as determined by the Investigator/designee;
  • agree not to participate in any other oral/dental product studies during the course of this study;
  • agree to delay any dentistry (including dental prophylaxis) until the study has been completed;
  • agree to refrain from the use of any non-study oral hygiene products;
  • agree to return for all scheduled visits and follow study procedures; and.
  • have at least one tooth with a Schiff sensitivity score of at least 1 in response to air challenge and a Yeaple Probe score of 10-40 in response to tactile challenge

Exclusion Criteria:

  • self-reported pregnancy or nursing;
  • severe periodontal disease, as characterized by purulent exudate, generalized mobility, and/or severe recession;
  • active treatment of periodontitis;
  • fixed facial orthodontic appliances;
  • a history of kidney stones;
  • known allergies to the following ingredients; aqua, glycerin, cellulose gum, dipotassium oxalate, carbomer, sodium hydroxide, sodium benzoate, and potassium sorbate
  • any diseases or conditions that might interfere with the safe completion of the study; or
  • an inability to undergo any study procedures.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT02189382

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United States, Nevada
Silverstone Research Group
Las Vegas, Nevada, United States, 89146
Sponsors and Collaborators
Procter and Gamble
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Responsible Party: Procter and Gamble Identifier: NCT02189382    
Other Study ID Numbers: 2014029
First Posted: July 14, 2014    Key Record Dates
Results First Posted: August 20, 2018
Last Update Posted: August 20, 2018
Last Verified: July 2018
Keywords provided by Procter and Gamble:
Additional relevant MeSH terms:
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Dentin Sensitivity
Immune System Diseases
Tooth Diseases
Stomatognathic Diseases