Many people know that double eyelids and nose jobs will make people more beautiful, but why do many people have double eyelids and high nose, but still not beautiful? Where exactly does the problem lie? Is there a standard for beauty? The results of plastic surgery have always depended more on the aesthetics, experience and skill level of the doctor, and the patient is in a completely passive position. Patients can choose the doctor, but ultimately cannot decide the outcome of the surgery according to their own wishes. Applying digital technology to aesthetic plastic surgery, the research and development of a computerized three-dimensional simulation and auxiliary manufacturing system can accurately determine where the defects of the appearance lie, design a personalized surgical approach and simulate the best post-operative results based on quantitative aesthetic indicators. This allows people to clearly see the new image after the surgical transformation before the surgery and to accept the surgery with confidence. Digital plastic surgery is a highly personalized process, where the design process is “made-to-measure” and the implants are “custom-made” and “unique”, making it possible to “What you see is what you get”, giving the patient a “beauty” that he or she pursues and that is truly his or her own. At the same time this technology in the field of plastic medicine has triggered a revolution in the concept, from the past “what you want to become” to “what you want to become”. To be beautiful is beautiful personality is no longer a fantasy of plastic surgeons and patients. One of the main reasons why previous cosmetic surgery techniques could not guarantee complete satisfaction for every patient was because of the inconsistent understanding of beauty between patients and doctors. In addition, the artificial implants currently used in plastic surgery are mostly made in uniform molds, and then trimmed by doctors using manual methods, making it difficult to achieve the exact same effect as expected, not to mention the inability to meet the individual needs of the patient in terms of form. The development process of digital plastic surgery technology The first generation: two-dimensional plane plastic surgery simulation system. This system uses front and side photos of the patient and distorts the photo images separately to simulate the changes before and after surgery. However, this simulation system can only provide two observation angles and cannot provide accurate data. The production of implants still depends on the doctor’s manual completion, so it cannot guarantee the consistency of the surgical effect and the simulation effect. Second generation: Virtual 3D simulation system. A virtual three-dimensional image is generated with the original data from the front and side photos of the patient. Although this system provides a three-dimensional view, like the second generation system, it cannot provide accurate shape and data of the implant, and it cannot obtain the morphology of the patient’s bones, which cannot be used for the design of the implant. Third generation: 3D digital simulation system. Using the patient’s CT scan and digital stereo scan as the original data, the computer reconstructs the accurate three-dimensional shape of the human skin and bones, which can truly simulate the surgical effect and accurately design the required three-dimensional model of the implant according to the simulation results, and finally use the CNC machining to produce the implant. Can cosmetic patients finally realize their wishes through digital technology? This system provides an accurate and intuitive communication platform between the doctor and the patient, who can not only express their wishes, but also participate in their own design process. At the same time, the doctor can clearly know the patient’s requirements, which are achievable through surgery and which are not. The “Personalized Facial Contouring Digital 3D Simulation and Design System” uses CT data to create a three-dimensional digital image of the patient’s face, uses a computerized 3D-aided design system to simulate the effects of the surgery, and uses CNC technology to customize personalized plastic implants for the patient. Patients can design the nose they want on the computer, not the nose the doctor wants. This way, the surgeon does not have to say “this is not for you,” but the patient can view the computer simulation from all angles and naturally know what kind of nose is right for him or her. The final result of the simulation is a digital model of the implant that is automatically calculated by the computer based on the simulation, which is transmitted directly through the network to the factory’s CNC equipment to produce an artificial implant with individual characteristics that meets the patient’s requirements. No manual sculpting is required during surgery, thus minimizing human error and maximizing the patient’s individual needs. How do artificial orthopedic implants made with the digital system differ from traditional prostheses? In the past, doctors sculpted implants by hand by observing the shape of the area to be changed, but not every plastic surgeon is a sculptor. In the case of rhinoplasty, for example, technically speaking, the key to rhinoplasty is the shape of the implant. Currently, the artificial implant materials used in cosmetic surgery are mostly manufactured in a uniform mold and then sculpted by the surgeon on the operating table according to the external shape of the patient’s nose. In other words, the shape of the surgery is entirely up to the surgeon, and the success of the surgery depends more on the surgeon’s aesthetics, experience and skill level. This is often a source of dissatisfaction for patients, many of whom find out after surgery that the result is far from their expectations and have to have the implant removed again. On the other hand, when sculpting the implant, the surgeon cannot see the shape of the nasal bone and nasal cartilage inside the incision, but can only estimate it based on the surface shape of the nasal skin, which often results in a sliding misalignment because the implant does not fit perfectly with the nasal bone. Therefore, traditional rhinoplasty is difficult to achieve exactly the expected results, not to mention the inability to meet the individual needs of the patient in terms of morphology. In addition to rhinoplasty, the same problem exists for cosmetic surgery of the jaw and frontal temporal area. The digital design system can design an implant that exactly matches the shape of the nasal bone, and then output the data to create a customized implant for the patient with an error of no more than 0.1 mm. Using the facial plastic surgery design process 1. Images of the person are captured with a digital camera and entered into the computer. 2, the doctor in the high-definition computer monitor on the original image of various distances, angles, proportions or areas of rapid measurement, against the aesthetic indicators, analysis of the deficiencies of the various organs of the face. 3.The person puts forward his or her requirements (such as whether he or she wants to have a nose job, double eyelids or a chin job), and the doctor then uses digital technology to process the person’s original image and simulate the post-operative image. 4. If the person is not satisfied with the simulated effect, he/she can raise objection to the doctor, who will synthesize the person’s opinion, the overall aesthetic effect and the feasibility and limitations of the surgery, and simulate the post-operative effect again, and then perform the surgery after receiving the person’s approval. The process of making personalized implants 1. Have the patient do a spiral CT of the skull to obtain data on the morphology of the craniofacial bone. 2.Enter the data into the computer, design on the computer, and let the patient participate in the design at the same time, and come up with a simulation model that both the patient and the doctor are satisfied with, at which time the patient knows how he or she will look after the surgery. 3.The data from the mockup is sent to the processing plant to be processed and shaped into a clinically applicable implant model. 4, and finally back to the hospital to apply to the patient, that is, you can get a very similar to the preoperative design of clinical results. What cosmetic surgery procedures can be designed with computer simulation? Other procedures that use digital technology for simulation and artificial prosthesis production include: chin augmentation, temporal augmentation, cheek augmentation, forehead augmentation, brow augmentation, etc.