In vivo measurement of colour changes in 1600 natural teeth

The ideal smile has long been considered to be an asset, reflecting appearance. Dental discoloration is a relevant aesthetic problem, with dental cosmesis becoming a more and more requested procedure in the modern dental practice.Presently, on the market there are bleaching products based on hydrogen peroxide, with different concentrations; with these materials ti is possible to perform ambulatory or home bleaching.Higher hydrogen peroxide concentration products are typically used in the dental surgery and involve the dentist applying the mixture on the elements to be treated; with lower concentrations, scalloped trays are fabricated to be worn with the material at home.The purpose of this research is to verify the efficacy of bleaching tretament with Pola Office Plus (SDI, Australia) through spectrophotometric analysis, on a group of 100 patients, together with an assessment of the performance of the treatment a week after the initial bleaching procedure.