Inclusion Criteria:  premolar and/or molar tooth has class II caries lesion at D1 or D2 level according to ICDAS caries classification system.  Exclusion Criteria:  bad oral hygiene bruxism, malocclusion, dry mouth, periodontal disease, teeth with restoration, periodontal or periapical pathology non-opposite and/or non-contact teeth will not be included in the study.