This study aimed to evaluate the clinical performance of a novel, tooth-colored, self-adhesive bulk-fill restorative, and a conventional bulk-fill composite, for restoring class II cavities.

Inclusion Criteria:

• Patients in need of restorative treatment on at least two class II Cavities in premolars or molars.
• Presence of proximal caries in digital x-ray with code 2 to 4 according to the radiographic International Caries Detection and Assessment System (ICDAS I).
• Presence of proximal caries in initial or moderate stage according to the International Caries Classification and Management System (ICCMS™).
• Only posterior teeth with class II cavities that have antagonistic contact and at least one proximal contact.
• Absence of parafunctional habits.
• Good general health

Exclusion Criteria:

• Serious medical disorders
• Clinical signs of bruxism, traumatic malocclusion
• Pregnant or breast feeding at the time of restoration placement
• Intolerance or allergy toward the applied restorative materials