A Clinical Study to Assess the Effects of Various Dentifrice Technologies on Dentinal Hypersensitivity

A Randomized Clinical Study to Assess the Effects of Various Dentifrice Technologies on Dentinal Hypersensitivity

The objective of this study is to evaluate the efficacy (changes in dentinal hypersensitivity) and safety (oral soft tissue evaluation) after use of one of four dentifrices in subjects with pre-existing hypersensitivity over an 11-week period.

Study Overview

• Status: Completed
• Conditions: Dentin Hypersensitivity
• Intervention / Treatment: Drug: Stannous fluoride toothpaste; Drug: Potassium nitrate toothpaste; Drug: Sodium monofluorophosphate toothpaste; Device: Dipotassium oxalate toothpaste

• Study Type: Interventional
• Enrollment (Actual): 120
• Phase: Not Applicable

Contacts and Locations

Study Locations

• United States
  • Nevada
    • Las Vegas, Nevada, United States, 89146
      • Silverstone Research Group

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

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;
• sign a Confidentiality Disclosure Agreement (CDA);
• 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*;
• exhibit adequate oral hygiene (i.e., brush teeth daily and exhibit no signs of oral neglect);
• have an absence of extensive calculus above the gum line;
• agree to return for all scheduled visits and follow study procedures; and
• have two teeth with a Schiff sensitivity score > 1 in response to air challenge and a Yeaple probe score of 10-20 g in response to tactile challenge. (If these two eligible teeth are located in the same quadrant, they have to be separated by 2 other teeth.)

Exclusion Criteria:

• having taken anti-inflammatory, analgesic, or psychotropic drugs, chronically;
• chronic medical debilitating disease associated with constant or intermittent episodes of daily pain;
• any home-care bleaching, whitening products or have had a professional bleaching treatment within 4 weeks of the Baseline visit;
• dental prophylaxis within 2 weeks prior to Baseline visit;
• having received professional desensitizing treatment or having used over-the-counter desensitizing products within 6 weeks of the Baseline visit;
• having periodontal surgery, orthodontic treatment, or teeth restored in the preceding three months;
• having teeth or periodontium with pathology or defects likely to cause pain;
• having a history of allergies or hypersensitivity to ingredients in commercial dental products or cosmetics;
• self-reported pregnancy or lactation;
• having self-reported eating disorders, uncontrolled gastroesophageal reflux disease (GERD or Acid Reflux), excessive dietary or environmental exposure to acids, or other systemic conditions that are predisposing to dentinal hypersensitivity;
• history or presence of kidney disorders, kidney stones, have celiac disease, inflammatory bowel disease (ulcerative colitis or Crohn's disease), chronic pancreatitis, have had intestinal or weight-loss surgery, or if have stomach or intestinal problems that keep them from absorbing certain foods or nutrients;
• any diseases or condition that might interfere with the safe participation in the study;
• inability to undergo study procedures;
• having severe xerostomia;
• having had active caries within the 12 months;
• having high risk for caries development (rampant caries, multiple dental restorations, crowns with compromised margin) per examiners discretion;

• teeth will be excluded from study measurements if they:

  • have deep, defective, or facial restorations;
  • have full crowns, extensive caries, cracked enamel, or are abutment teeth for fixed or removable prosthesis;
  • present with tendency for spontaneous bleeding;
  • have been scaled/root planed or restored within the past 3 months.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Triple

Number of Arms

4

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Active Comparator: Marketed stannous fluoride toothpaste; Brush twice daily	Drug: Stannous fluoride toothpaste; Marketed stannous fluoride (0.454%) toothpaste
Active Comparator: Marketed potassium nitrate toothpaste; Brush Twice Daily	Drug: Potassium nitrate toothpaste; Marketed potassium nitrate (5%) toothpaste
Placebo Comparator: Marketed sodium monofluorophosphate toothpaste; Brush Twice Daily	Drug: Sodium monofluorophosphate toothpaste; Marketed sodium monofluorophosphate (0.76%) toothpaste
Experimental: Experimental dipotassium oxalate toothpaste; Brush Twice Daily	Device: Dipotassium oxalate toothpaste; Experimental dipotassium oxalate (3%) toothpaste

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Air Challenge	The Schiff Sensitivity Scale will be assessed for each test tooth via an evaporative air challenge. The examiner will record 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 least square mean will be calculated for this measure.	4 weeks

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Baseline Air Challenge	The Schiff Sensitivity Scale will be assessed for each test tooth via an evaporative air challenge. The examiner will record 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.	Baseline
Air Challenge	The Schiff Sensitivity Scale will be assessed for each test tooth via an evaporative air challenge. The examiner will record 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 least square mean will be calculated for this measure.	3 days
Air Challenge	The Schiff Sensitivity Scale will be assessed for each test tooth via an evaporative air challenge. The examiner will record 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 least square mean will be calculated for this measure.	2 weeks
Air Challenge	The Schiff Sensitivity Scale will be assessed for each test tooth via an evaporative air challenge. The examiner will record 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 least square mean will be calculated for this measure.	8 weeks
Air Challenge	The Schiff Sensitivity Scale will be assessed for each test tooth via an evaporative air challenge. The examiner will record 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 least square mean will be calculated for this measure. All subjects will have been on three weeks use of a marketed sodium monofluophosphate toothpaste (from week 8 to week 11).	11 weeks
Baseline Yeaple Probe	Tactile Threshold will be measured using a Yeaple probe. Testing is performed beginning at 10 g. The examiner records tactile scores for responding teeth. After treatment, testing begins at 10 g and increases by 10 g to a maximum of 50 g. The higher the tactile threshold, the less sensitive the tooth. Each successive challenge increases until a "yes" response is repeated. If a second "yes" is not obtained, the force setting is increased to the next step and continued until a force is found which elicits two consecutive "yes" responses and will be recorded as the threshold on the Tactile Sensitivity Score form.	Baseline
Tactile Threshold	Tactile Threshold will be measured using a Yeaple probe. Testing is performed beginning at 10 g. The examiner records tactile scores for responding teeth. After treatment, testing begins at 10 g and increases by 10 g to a maximum of 50 g. The higher the tactile threshold, the less sensitive the tooth. Each successive challenge increases until a "yes" response is repeated. If a second "yes" is not obtained, the force setting is increased to the next step and continued until a force is found which elicits two consecutive "yes" responses and will be recorded as the threshold on the Tactile Sensitivity Score form. The least square mean will be calculated for this measure.	3 days
Tactile Threshold	Tactile Threshold will be measured using a Yeaple probe. Testing is performed beginning at 10 g. The examiner records tactile scores for responding teeth. After treatment, testing begins at 10 g and increases by 10 g to a maximum of 50 g. The higher the tactile threshold, the less sensitive the tooth. Each successive challenge increases until a "yes" response is repeated. If a second "yes" is not obtained, the force setting is increased to the next step and continued until a force is found which elicits two consecutive "yes" responses and will be recorded as the threshold on the Tactile Sensitivity Score form. The least square mean will be calculated for this measure.	2 weeks
Tactile Threshold	Tactile Threshold will be measured using a Yeaple probe. Testing is performed beginning at 10 g. The examiner records tactile scores for responding teeth. After treatment, testing begins at 10 g and increases by 10 g to a maximum of 50 g. The higher the tactile threshold, the less sensitive the tooth. Each successive challenge increases until a "yes" response is repeated. If a second "yes" is not obtained, the force setting is increased to the next step and continued until a force is found which elicits two consecutive "yes" responses and will be recorded as the threshold on the Tactile Sensitivity Score form. The least square mean will be calculated for this measure.	4 weeks
Tactile Threshold	Tactile Threshold will be measured using a Yeaple probe. Testing is performed beginning at 10 g. The examiner records tactile scores for responding teeth. After treatment, testing begins at 10 g and increases by 10 g to a maximum of 50 g. The higher the tactile threshold, the less sensitive the tooth. Each successive challenge increases until a "yes" response is repeated. If a second "yes" is not obtained, the force setting is increased to the next step and continued until a force is found which elicits two consecutive "yes" responses and will be recorded as the threshold on the Tactile Sensitivity Score form. The least square mean will be calculated for this measure.	8 weeks
Tactile Threshold	Tactile Threshold will be measured using a Yeaple probe. Testing is performed beginning at 10 g. The examiner records tactile scores for responding teeth. After treatment, testing begins at 10 g and increases by 10 g to a maximum of 50 g. The higher the tactile threshold, the less sensitive the tooth. Each successive challenge increases until a "yes" response is repeated. If a second "yes" is not obtained, the force setting is increased to the next step and continued until a force is found which elicits two consecutive "yes" responses and will be recorded as the threshold on the Tactile Sensitivity Score form. The least square mean will be calculated for this measure. All subjects will have been on three weeks use of a marketed sodium monofluorophosphate toothpaste (from week 8 to week 11).	11 weeks

Collaborators and Investigators

• Sponsor: Procter and Gamble

Study record dates

Study Major Dates

• Study Start (Actual): July 8, 2019
• Primary Completion (Actual): October 3, 2019
• Study Completion (Actual): October 3, 2019

Study Registration Dates

• First Submitted: May 23, 2019
• First Submitted That Met QC Criteria: May 23, 2019
• First Posted (Actual): May 28, 2019

Study Record Updates

• Last Update Posted (Actual): October 30, 2020
• Last Update Submitted That Met QC Criteria: October 26, 2020
• Last Verified: October 1, 2020

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Immune System Diseases; Stomatognathic Diseases; Tooth Diseases; Hypersensitivity; Dentin Sensitivity; Physiological Effects of Drugs; Protective Agents; Cariostatic Agents; Fluorides; Tin Fluorides; Fluorophosphate
• Other Study ID Numbers: 2019079

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: Yes
• product manufactured in and exported from the U.S.: No