Photography is both an art and an inexhaustible source of information. The nature of the environment, the small sizes and distances involved, the difficulty of access, make clinical photography an art as well as a science. It is essential for the dental surgeon who wants to improve and go further. However, still very few practitioners use it. Many preconceived ideas exist about photography in dentistry: It is a complex and time-consuming procedure which requires prior training, due to the diversity of its equipment and the precision of the shooting techniques for reliability. the image. In this work we will try to detail the different parameters of the smile and to clarify preconceived ideas about dental photography. In the first part, we will detail the aesthetic references and the methods of analyzing the smile. In a second part, we will detail the major interests of photography in the dental office and in the prosthesis department and we will simplify the technical aspects by focusing on the knowledge necessary for the choice of its equipment and for daily practice in dentistry.