The aim of this study is to evaluate and compare the clinical performance of 2 ion-releasing bulk-fill restorative materials in comparison with a bulk-fill resin composite restoration in posterior cavities.

Inclusion Criteria:

• Criteria for patient's inclusion in the study will be the presence of at least 3 occlusal or proximal carious lesion in posterior teeth, favourable and stable occlusion between the remaining teeth, the patients must be older than 18 years old with permanent dentition, moderate oral hygiene, asymptomatic vital teeth with no sensitivity to percussion, and the presence of contact with adjacent teeth

Exclusion Criteria:

• Exclusion criteria will be, sever bruxism, patients with known unavailability to attend recall visits, patients with known allergy to any component of the study materials, pulp exposure during caries excavation, patients with unstable medical conditions and pregnant or lactating individuals.