Abstract
The objective of this study is to evaluate the preventive effect of the gel contends extract of Neem on specimens of bovine dentine submitted to the erosion in vitro. Eighty bovine dentine blocks (4X4 mm) standardized for the superficial microhardness and will be divided in 4 groups, in accordance with the treatment: C (control, base gel); F (fluoride gel, NaF 1.23%); N (Neem gel) and F+N…