- The following oral and dental inclusions will apply at Screening (Visit 1): Self-reported history of dentinal hypersensitivity lasting more than six months but not more than 10 years, good general oral health, with a minimum of 20 natural teeth, minimum of 2 accessible non-adjacent teeth (incisors, canines, pre-molars), preferably in different quadrants, that meet all of the following criteria: signs of facial/cervical gingival recession and/or signs of erosion or abrasion (EAR), tooth with Modified Gingival Index (MGI) score =0 adjacent to the test area (exposed dentine) only and a clinical mobility of ≤1, tooth with signs of sensitivity measured by a qualifying tactile stimulus (Yeaple ≤20g) qualifying evaporative air assessment (Schiff sensitivity score >=2). The following dental inclusions will apply at Baseline (Visit 2): Minimum of two, non-adjacent accessible teeth (incisors, canines, pre-molars), with signs of sensitivity, measured by response to a qualifying tactile stimulus (Yeaple ≤20g) and evaporative air assessment (Schiff sensitivity score ≥2). The two selected test teeth must have also qualified at Screening for this criteria. The Investigator will select two Test Teeth from those which meet both the tactile threshold and Schiff sensitivity score criteria, in addition to meeting all other criteria. Test teeth should not be adjacent to each other and preferably in different quadrants.