Three-Year Clinical Performance of Fiber-reinforced Versus Indirect Resin Composite Posterior Restorations

Inclusion Criteria: 1. Patients aged 20-35 year from both genders. 2. Good oral hygiene: patients with low and moderate caries risk (according to Caries management by caries risk assessment CAMBRA sheets) were enrolled in this study. 3. The visual examination should reveal the presence of a minimum of three primary occlusal or proximal caries (Black Class I and II) with a severity score of 4 or 5 according to the International Caries Detection and Assessment System (ICDAS). 4. The carious teeth must exhibit vitality and do not display periapical radiolucency as evaluated by periapical radiography. 5. The selected teeth must be under stable occlusion. Exclusion Criteria: 1. Uncontrolled systemic disease 2. Extremely poor oral hygiene 3. Chronic periodontitis 4. Heavy bruxism 5. Cavities with a buccolingual width exceeding two-thirds of the intercuspal distance or requiring cusp covering. 6. Patients undergoing orthodontic procedures. 7. Patients unable to attend the scheduled recall appointments.