Effect of Different Desensitizing Agents on Post-bleaching Hypersensitivity and Shade Stability

Inclusion Criteria: * Participants with their entire upper and lower teeth, from right first premolar to left first premolar, present and sound, without restorations or periodontal disease. * The participants had low-caries index scores. * Participants had teeth with a Vita-color shade of A2 or darker. * Cooperative behavior patient and medically free. * Patient ages between 18 to 40 years old Exclusion Criteria: * Serious medically compromised patients. * Smoking, alcoholism. * Hypersensitivity to the agents used in the study. * Lactating, pregnant patients. * Patients with serious oral diseases, as acute necrotizing gingivitis, acute gingiva stomatitis, or those undergoing orthodontic treatment. * Patients with dental enamel cracks. * Patients who've had previous bleaching treatments