Clinical Performance of Two Different Resin-Matrix Ceramic Restorations

Inclusion Criteria: 1. The presence of two molars with compound proximal carious lesions or defective restorations involving two surfaces (occluso-mesial or occluso-distal cavities) corresponding to Black's Class II, with a severity score of 4 or 5 according to the International Caries Detection and Assessment System (ICDAS) 2. The buccolingual width of lesions should exceed two-thirds of the intercuspal distance. 3. The teeth were required to be vital and free from any periapical radiolucency. 4. The teeth were required to be in normal alignment, in contact with sound adjacent teeth, and have antagonist teeth present in normal occlusion. Exclusion Criteria: 1. The presence of uncontrolled systemic disease, pregnancy or breastfeeding. 2. Patients with extremely poor oral hygiene, active periodontal disease, or those involving in orthodontic treatment or periodontal surgery. 3. Patients with wear facets and parafunctional habits as clinching and bruxism. 4. Hypersensitive, endodontically treated, non-vital or cracked teeth. 5. Teeth with proximal cavities involving more than two surfaces, those that exhibited pulp exposure during caries excavation and required direct pulp capping, or those with missing cusps necessitating cusp capping. 6. Teeth without proximal contact, missing neighbouring or opposing teeth 7. Patients with known unavailability to attend recall visits, or with known allergy to any component of the study materials.