- At Visit 1 (Screening): a) Self-reported history of dentinal hypersensitivity (DH) lasting more than six months but not more than 10 years. b) Minimum of 20 natural teeth. c) Minimum of 2 accessible non-adjacent teeth (incisors, canines, pre-molars), in different quadrants and separated by at least two teeth (or equivalent edentulous space), that meet all of the following criteria: Signs of facial/ cervical (i.e. labial/ buccal) gingival recession and/or signs of erosion or abrasion (EAR), tooth with MGI score = 0 adjacent to the test area (exposed dentine) only and a clinical mobility of ≤1 and tooth with signs of sensitivity measured by qualifying evaporative air assessment (Y/N response) on the facial/ cervical (i.e. labial/ buccal) tooth surface.