Inclusion Criteria:  Age: 18-65 years Indication for indirect restorations (inlay, onlay) in molar or premolar - replacement of insufficient fillings (e.g. due to caries at margins, filling fracture, fracture of the tooth, poor quality of the surface, leaking margin, etc.) or extensive primary caries The occlusal area of the restoration must cover at least 1/3 of the occlusal area of the tooth. Participant wishes a restoration within the scope of the study (signed informed consent after detailed explanation and study of the patient information) Pre-operative discomfort of the tooth to be restored should not exceed 3 on the visual analogue scale (VAS) (0=no pain, 10=maximum conceivable pain) due to temperature stimulus or bite sensitivity Max. 2 restorations per participant in different quadrants. Healthy periodontium, no active periodontitis Contact with adjacent teeth (at least at one side) and opposing teeth present with at least one contact point. Sufficient language skills  Exclusion Criteria:  Sufficient isolation not possible, dry working field cannot be guaranteed Participants with a proven allergy to one of the ingredients of the materials used Participants with proven allergy to local anaesthetics High caries activity/ poor oral hygiene Participants with severe systemic diseases Pregnancy Symptoms of SARS-CoV2 infection