Inclusion Criteria:  Patients aged between 18 and 55 years having class 1 occlusal caries(1.2 according to G. J. Mount classification) on both sides of arch. In order to standardise the cavity preparation depth(approximately 1.5 to 2mm from the roof of the pulp chamber), the distance from occlusal surface to roof of pulp chamber will be used for measuring with the radiograph. Roots with closed apex. Systematically healthy patients. Patients with no other symptomatic tooth involved  Exclusion Criteria:  Teeth with the presence of any pathologic pulpal disease with or without pain. Teeth with previous restorations, any defective restoration adjacent to or opposing the affected tooth. Teeth with surface loss due to attrition, erosion, abrasion, or abfraction. Patients with poor oral hygiene, severe, or chronic periodontitis. Patient on medication which may hinder the response to sensitivity.