Inclusion Criteria:  aged between 35 and 45 years signed an approved Informed Consent Form, authorizing the participation in the trial and the use of the results of the trial for educational purposes and for the publication the diagnosis of dentin hypersensitivity stated clinically a premolar or first molar with an abrasive cervical defect of at least 1 millimeter, and not deeper than 1.5 millimeter, as measured by placing a periodontal probe into the deepest part of the cervical lesion; no mesial, distal or buccal restorations (to avoid confounding hypersensitivity) a hypersensitivity score of 2 or higher on the Shiff scale with standardized air-blast stimulation no other tooth in the same quadrant exhibiting hypersensitivity  Exclusion Criteria:  medical and pharmacotherapeutic histories that may compromise the protocol (pregnancy or breastfeeding, allergies to toothpastes ingredients, eating disorders) systemic conditions that are etiologic to dentin hypersensitivity (e.g., chronic acid regurgitation) excessive dietary or environmental exposure to acids periodontal surgery in the preceding 3 months orthodontic appliance treatment within previous 3 months teeth or supporting structures with any other painful pathology or defects teeth restored in the preceding 3 months abutment teeth for fixed or removable prostheses extensively restored teeth and those with restorations extending into the test area.