Introduction: Restorative dentistry and aesthetics as her ofspring, have made remarkable progress in previous decades that incorporates its results into the therapeutic methods of modern dentistry. Teeth whitening, which has long been a topic of humanity, today is a simple and safe procedure easily accessible to everyone. Many scientific papers were initially skeptical about the actual effect of hydrogen peroxide on dental structures, but today's research is based on its safety. Ease of application, speed of action and ease of manipulation, these method gives high popularity to a wide range of today's population. The comprehensibility of the mechanism of teeth whitening is not only simple but it is intriguing even among patients who gladly accept such services. The side effects of teeth whitening are minimized and are mostly transient in nature without any harmful effects if they are manipulated according to the rules of modern doctrine. Purpose of the paper: The purpose of this review paper is to consider and describe current reference evidence on the causes of dental discoloration and on the techniques, indications and side effects of whitening of hard dental tissues. It is important to compare the research and, considering their results, to notice which methods are the most productive from the clinical point of view, but also the safest for each patient individually. Methods of work: During the preparation of this diploma thesis, scientific articles and faculty textbooks recommended by the curriculum for higher education of dentists were used. Articles from foreign newspapers are available on the Cohrane and pubMed web portals. The diploma theses of colleagues from the region and the world available on standard internet search engines were also used.