The objective of this study is to evaluate the clinical efficacy of a prophylaxis paste containing 10% arginine bicarbonate on dentinal hypersensitivity reduction when applied as a pre-procedure to a professional dental cleaning.

Inclusion Criteria:

• Male and female subjects, ages 18-70, inclusive.
• Availability for the three (3) week duration of the study.
• Two (2) sensitive teeth, which must be anterior to the molars, and demonstrate cervical erosion/abrasion or gingival recession.
• Qualifying response to tactile stimuli (Yeaple probe) as defined by a score between 10-50gms. of force.
• Qualifying response to the air blast stimuli as defined by a score of 2 or 3 on the Schiff Cold Air Sensitivity Scale.
• Subjects need to satisfy the qualifying response to stimuli for both the parameters assessed (tactile or air) on two teeth to be entered into the study.
• Good general health with no known allergies to products being tested.
• Use of a non-desensitizing dentifrice for three months prior to entry into the study.
• Signed Informed Consent Form.

Exclusion Criteria:

• Gross oral pathology, chronic disease, or history of allergy to test products.
• Advanced periodontal disease or treatment for periodontal disease (including surgery) within the past twelve months.
• Scheduled dental prophylaxis within three weeks prior to the Baseline Hypersensitivity Examination.
• Sensitive teeth with mobility greater than one.
• Teeth with extensive/defective restorations (including prosthetic crowns), suspected pulpitis, caries, cracked enamel, or used as abutments for removable partial dentures.
• Subjects that began to take anticonvulsants, antihistamines, antidepressants, sedatives, tranquilizers, anti-inflammatory drugs, or daily analgesics within one month prior to the start of the study or who have to start taking these during the course of the study.
• Participation in a desensitizing dentifrice study or regular use of a desensitizing dentifrice within the past three months.
• Current participation in any other clinical study.
• Pregnant or lactating subjects.
• Allergies to oral care products, personal care consumer products, or their ingredients.
• Medical condition which prohibits not eating/drinking for 4 hours.