- General oral and dental exclusions: Dental prophylaxis within 4 weeks of Screening, tongue or lip piercing or presence of dental implants, gross periodontal disease, treatment of periodontal disease (including surgery) within 12 months of Screening, scaling or root planning within 3 months of Screening, teeth bleaching within 8 weeks of Screening, use of an over-the-counter (OTC) desensitizing product (e.g. dentifrice) and/or professional desensitizing treatment within 8 weeks of Screening. participants will be required to bring their current oral care products to the site in order to verify the absence of known anti-sensitivity ingredients.