Clinical Performance of Two Fissure Sealants

Inclusion Criteria: participants * ASA Status 1 * all dentinal lesions are restored * consent of parents and patient * instruction and demonstration of oral hygiene teeth: * first and second molars of the permanent dentition * healthy teeth without caries * molars with primary lesions Exclusion Criteria: participants * no consent * allergies to methacrylates or other ingredients of dental products teeth: * molars with occlusal cavities (UniViSS score occlusal \> M) * Molars with untreated dentinal lesions * premolars, incisors, deciduous teeth * teeth with huge occlusal restorations * hypomineralized teeth or other defects