Inclusion Criteria:  Patients with primary caries involving occlusal surface only with ICDAS 2 and 3. Patients with cavities no more than one-third of the intercuspal distance. Patients must have a good oral hygiene. Patients with tooth gives positive response to testing with an electric pulp tester. Patients with normal and full occlusion. Patients with opposing teeth should be natural with no restorations.  Exclusion Criteria:  High caries risk patients with extremely poor oral hygiene. Patients involved in orthodontic treatment or periodontal surgery. Patients with periodontally involved teeth (chronic periodontitis). Patients with abutments should be excluded. Patients with heavy bruxism habits and clenching.