The problem of real treatment teeth hypersensitivity is still important and unsolved. main goal the experiment was to calculate possible toxic effects on fibroblasts cells CCL-1™ (NCTC clone 929) caused by original preparation reduce tooth surfaces’ hypersensitivity, compared marketable Seal & Protect (Dentsply). assessment made through measuring lactate dehydrogenase (LDH assay). Lactate r...