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on the control of specific risk factors. Health warnings on tobacco packages that combine text and pictures, along with the frequent role of impact of mass media and campaigns on mouth self-examination and improvement in quality of life can effectively increase the general public awareness of the serious and deleterious health risks of tobacco use and to reduce its consumption. The aim of this research was to study the effect of etching by phosphoric acid with rubbing technique on the shear bond strength (SBS) of adhesive universal to en