Comparing the Clinical Success of Two Different CAD/CAM Full Cuspal Coverage Onlays

Inclusion Criteria: * The presence of two teeth requiring restorative treatment (onlays) because of primary or secondary caries or final restoration is needed after root canal treatment, with adjacent and antagonist teeth * At least two walls (buccal and oral) with a minimum length of 2.5 mm and a width of 2 mm * The deepest point of the tooth structure should be above a minimum of 3 mm of supracrestal * The crown-to-root ratio is minimum 1:1 Exclusion Criteria: * Inadequate oral hygiene * Pregnancy * Allergies to restorative materials * Parafunctional habits (e.g., teeth grinding or clenching) * Presence of orthodontic appliances * Premolars that have undergone root canal treatment