Inclusion Criteria:  Patients with non-carious cervical lesions (NCCL). Co-operative patients approving to participate in the study. Pulp is asymptomatic vital teeth. Presence of favorable occlusion and teeth are in normal contact with the adjacent teeth.  Exclusion Criteria:  Xerostomia. Bruxism and visible wear facets in the posterior dentition. Known inability to return for recall appointments. Fractured or visibly cracked candidate tooth. Current desensitizing therapy, including desensitizing dentifrices or other over-the-counter (OTC) products. Long-term use of anti-inflammatory, analgesic, or psychotropic drugs. Pregnancy or breast-feeding (potential conflicts with recall dates. Allergies to ingredients of resin-based restorative materials. Orthodontic appliance treatment within the previous three months. Abutment teeth for fixed or removable prostheses. Teeth or supporting structures with any symptomatic pathology. Existing periodontal disease or periodontal surgery within the previous three months.