Aesthetics are very important in today's society, including dental medicine. We can see patients visiting dental practices, more and more often wishing to improve the aesthetics of their smile. The experience and skills of clinicians and their knowledge of the aesthetic parameters of face and smile play an important role in successful planning of aesthetic prosthetic therapy. Computer-aided smile design can thereby be of great help to them. Digital Smile Design softwares are relatively new programmes in dental medicine, allowing to plan and visualize the appearance of future prosthetic work, based on digital photographs and videos of the patient's smile. These programmes improve communication between a dentist and a dental technician, as well as between a dentist and a patient. Patients can see the appearance of future dental outcome on a computer and express their satisfaction, thus providing them with an opportunity to actively participate in the planning of therapy. Computer-aided smile design speeds up and simplifies the therapy planning process, but the prerequisite for its use are special further education of dentists and the possession of additional equipment. Vita Assist is one of the examples of a computer-aided smile design programme that allows us to choose different Vita teeth, depending on which ones best suit the individual patient.