Clinical Evaluation for Post Bleaching Hypersensitivity Using Desensitizing Agent During In-office Bleaching

Inclusion Criteria: * Patients must show no signs of spontaneous dental pain. * Male or female patients between the ages of 18 to 40. * Patients with good general and oral health. * Patients having six caries-free maxillaryanterior teeth without restorations on the labial surfaces. * Patients should have central incisors determined to be shade C2 or darker Exclusion Criteria: * Patient with spontaneous dental pain. * Patient with anterior restorations or non carious cervical lesion. * Patient having severe internal tooth discoloration (tetracycline stains, fluorosis, pulpless teeth), and bruxism habits. * Tempro-mandibular joint problems involving symptomatic pain. * Patients taking analgesics that could alter their normal pain perception level. * Pregnant or breast feeding women.