## 4 Discussion  
The traditional workflow for creating an epithesis takes an anaplastologist approximately 7-14 days to finish the fabrication using traditional contact impression, mold making, wax carving, and casting and creating the silicone epithesis, as well as including patient visits to the hospital related to the fittings of the prosthesis at individual stages of the workflow [13]. The process of taking a facial impression was very uncomfortable for the patient due to the duration of plaster setting, the possibility of aspiration of the impression mass to the upper respiratory tract, and the inability to accurately reproduce the whole post-resection defect [6]. Aspiration of plaster during a facial impression can be a life-threatening situation [14]. This time-consuming and stressful process can now be replaced by a painless CBCT procedure. Unlike a standard dental X-ray, CBCT captures a 3D image and images of the soft tissues of the face. It is a non-invasive way to get a complete 3D picture of the surface of a patient's face [15]. It exposes patients to substantially less radiation than a traditional CT. CBCT is used to create a 3D image of a body region, usually the mouth, head, and face. A scan takes approximately 20 s and is completely painless. This is a tremendous innovation compared with a manual impression. Better facial topography and skin texture capture is also possible using high-resolution 3D scanners [16]. Yet another advantage of CBCT is its utility in planning for implantation for implant-retained prostheses rehabilitation. In the next stage of the traditional workflow for creating an epithesis, the anaplastologist manually sculpts a wax model of the prosthesis on a plaster model of the face. Unfortunately, the wax carving has a serious defect in that once the changes have been made, they cannot be easily undone. Each change of design requires many hours of work, excellent manual skills, and is associated with the inability to immediately return to the previous version of the sculpture design. This is where the Zbrush software and digital sculpting prove useful in designing the prosthesis. A digitally designed epithesis trial model can be printed for fitting, the same as a wax model [8]. In the traditional workflow, the next step would be to make plaster molds. The wax model is lost in the technological process of making them. The resulting forms can also be damaged during the casting of a silicone prosthesis. If that happens, all work has to be started from the beginning, which could be a huge setback in the process. In comparison, the main advantage of a computer design is that each step of the design process can be saved, refined and improved. Most importantly, it is possible to reprint molds without the need of designing them again, which is of great importance when the final denture wears out or breaks down [17; 18]. Another advantage of digital sculpting is that a patient can actively participate in the designing of the prosthetic restoration, and can give the creator tips on how he/she would like to look after the restoration while simultaneously viewing the effects on the screen. Digital tools enable the preparation of many virtual epitheses without the need of ultimate implementation. The result can be presented to the patient who might accept the best version. This affects not only the aesthetic but especially the psychological aspect of the process as well that favors the full acceptance of the patient's new appearance. The whole process does not have to take place in a hospital, which can often be associated with painful procedures and loss of a part of the patient's own identity [7]. All that is needed for visualization is a laptop or tablet with dedicated software, which ensures that meeting in a safe and patient-friendly environment is possible. The workflow color selection and coloring of the prosthesis was done by a skilled prosthetist. However, visual perception can fail. Many factors, such as light, influence the way the human eye sees and processes color.