In patients with endodontically treated molar teeth indicated for endocrown, will the fiber reinforced FRC base and bonded CAD/CAM resin composite endocrowns restorations have a similar clinical performance to the conventional lithium disilicate endocrown over one year?

Inclusion Criteria:

• Patients with good oral hygiene
• Patients having one or more endodontically treated molars that need prosthetic restoration.
• Molars should have enough tooth structure for endocrown restoration with minimum 3 walls with thickness not less than 1.5 mm and gingival step placed supragingival
• Fully erupted molars
• Molars free of developmental defect
• Healthy periodontium
• Absence of periapical pathosis
• Acceptable endodontic treatment and proper bone support

Exclusion Criteria:

• Patients with bad oral hygiene
• Patients with active periodontal disease
• Patients with missing teeth opposing to the area intended for restoration
• Patients with parafunctional habits or psychiatric problems or unrealistic expectation.