Split-mouth Study of a New Flowable Composite in Non-carious Cervical Lesions

Inclusion Criteria: * Informed Consent signed by the subject * Age: 18-65 years * 2 NCCL needing treatment, comparable in extend and size, preferably located in different quadrants * Vital teeth, regular sensitivity * Sufficient language skills * No active periodontitis * Preoperative VAS values \< 3 regarding tooth sensitivity on biting. Tooth sensitivity on temperature or touching (tooth brushing, probing) originating in the area of the NCCL is accepted. * Subject wishes to have a restoration as part of the study (written declaration of consent after detailed explanation) Exclusion Criteria: * Not completed hygiene phase or poor oral hygiene * Sufficient isolation of the cavity not possible * Patients with a proven allergy to one of the ingredients (methacrylates) * Patients with severe systemic diseases * Periodontally insufficient dentition * Pregnancy * Part of the development project team of TM Flow * Staff of the study management team * Staff of the internal clinic