Wear Resistance Of Bioactive With And Without Etching Vs. Conventional Resin-Based Fissure Sealants

Inclusion Criteria: * patients aged between 18-25 years old with caries susceptible sound fissures and good oral hygiene * They should not show any signs of caries by visual tactile examination method and VistaProof fluoroscent camera * Teeth should have intact contact with opposing teeth, no previous restorations in other surfaces, no previous sealing procedures and scoring 0.9 or less when tested and VistaProof. * Medically free patients. Exclusion Criteria: * Patients with poor oral hygiene, lack of compliance, parafunctional habits, tempro-mandibular joint disorders, periodontal disease, severe medical conditions, allergic history concerning methacrylates, rampant caries, heavy smoking and xerostomia. * Teeth with caries pits and fissures, developmental anomalies, periapical pathology or signs of pulpal pathology, hypersensitivity, possible prosthodontic restoration, heavy occlusion and occlusal contacts, history of bruxism, severe periodontal affection and scoring \>0.9 when tested with VistaProof