Evaluation of a New Bioactive Material Versus a Fluoride-Releasing Hybrid Restorative Material in Cervical Lesions

Inclusion Criteria: * a)Inclusion Criteria of participants: * Male or female gender. * Only co-operative patients will be approved to participate in the trial. * Medically free adult patients. * The age range of the patients is 18-40 years. b)Inclusion Criteria of teeth: * Small to moderate cervical lesion. * Vital upper or lower teeth with no signs of irreversible pulpitis. * Caries extension shouldn't exceed mesiodistal width and inciso(occluso)-gingival length not exceed incisal (occlusal) one third. Exclusion Criteria: * a)Exclusion criteria of participants: * Allergic history concerning methacrylates * Pregnancy * Heavy smoking; xerostomia * Lack of compliance * Patients with disabilities. * Patients having systemic diseases or severe medically compromised. * Patients with severe bruxism, clenching, or temporomandibular joint disorders. b)Exclusion criteria of the teeth: * Deep defects (close to the pulp, less than 1 mm distance). * Periapical pathology or signs of pulpal pathology. * Possible prosthodontic restoration of teeth. * Heavy occlusion and occlusal contacts or history of bruxism. * Pulpitis, non-vital or endodontically treated teeth. * Sever periodontal affection.