Tooth wear has a multi-factorial etiology involving the interplay of attrition, erosion and abrasion. When two-body abrasion occurs in the mouth whenever there is tooth-to-tooth contact, this is what most dentists call attrition. Abrasion wear may also occur when there is an abrasive slurry interposed between two surfaces, such that the two solid surfaces are not actually in contact, this is called three-body abrasion, with food acting as the abrasive agent, and occurs in the mouth during mastication.The aim of the present study are studying the effect of abrasives of toothpaste on the...