An impression in fixed prosthetic therapy is the most important communication tool between dentists and dental technicians. Since the impression is the first step in the "production chain", possible errors will be reflected in all subsequent processing steps during the fabrication of a restoration and influence its final precision. Therefore, there is a continuing quest for better materials and technologies to reduce errors to a minimum. Modern digital methods have been developed to speed up and simplify the fabrication procedure, enabling standardization and effective quality management. Three-dimensional (3D) digitalization is the basis of a digital impression. The digitalization process in dentistry can be conducted intraorally or extraorally, which is more common because of the convenience. Modern systems are based on optical methods of digitalization. Today, the mainly used light source is laser due to less sensitivity to surrounding factors. The benefits of digital impressions are speed, efficiency, more comfortable procedure for the patient, greater accuracy due to reduced influence of the human factor, the ability to store data for an indefinite period without occupying physical space, and easier transfer of digital images between the clinic and the laboratory. The quality of the impression depends on the technical level of equipment used, as well as the education and expertise of the therapist. Each new generation of devices offers new possibilities with new sensors, electronics and softwares, which make the process easier, faster and more accurate.