The document summarizes a project conducted by odontology students at the National University of Chimborazo in Ecuador from September 2014 to December 2015. The project aimed to understand the risks and benefits of teeth whitening through surveys of students. It found that 30% of students surveyed had undergone teeth whitening, with most citing improved smile and stain removal as benefits. However, risks included tooth sensitivity, soft tissue inflammation, and gingivitis. The document provides background on teeth whitening and factors that can affect its success or risks.