With the development of science and technology, human society has entered the digital age. The perfect combination of digital technology and medicine has formed a brand-new digital medicine discipline. Dental 3D printer is a brand-new manufacturing technology that emerged in this context. 3D printing technology has changed the traditional manufacturing model. It is an important link in the development of digital medicine. 3D printing technology is a rapid prototyping technology that uses reconstructed three-dimensional digital models to layer and stack them into a solid model. In the field of stomatology, the 3D printer technology of oral dentistry is gradually applied to various majors such as oral and maxillofacial surgery, implants, prosthetics, stomatology, orthodontics, etc. with its unique advantages.

Principle of oral 3D printer:

1. Collect image data. The collection of three-dimensional data is an important step in modeling. The dental model of the patient is made with the impression material, and the plaster model is formed by injecting plaster after taking the model. The 3D scanner is used to scan the molded plaster model and obtain an image of the tooth surface. At the same time, a CT scan of the oral cone was performed on the patient. Obtaining a three-dimensional image of the inside of the oral cavity, you can intuitively see the direction of the mandibular nerve and the structure of the teeth and alveolar bone. Optical scanning often uses three-dimensional laser scanning, projection raster measurement, Moiré fringe method or stereo photography, which has a higher scanning rate and better accuracy.

2. Data processing. Import the data with 3D image processing software. Take the CT scan data as an example, import the CT scan data into the software Mimics or Geomagic and Imageware in DICOM format. These softwares can read data in DICOM format, set thresholds for tissues of different densities, construct morphological surfaces and reconstruct 3D models. The external image of the tooth obtained by the mold-taking scan and the internal image of the tooth obtained by oral CT photography are reconstructed to obtain a data image, which contains the internal condition of the tooth and the surface texture structure, which is generally called a digital hologram. In the hologram, the doctor can select and design the implant to make a surgical plan.

3. Oral 3D printer. After the design is completed, the computer can automatically design the navigation template. Navigation templates, personalized bases, and temporary crowns can be printed by a 3D printer, realizing instant planting in one day.

With the application of oral 3D printer technology, surgery has evolved from a traditional pure experience to digital and precise. Maxillofacial trauma and tumors can cause maxillofacial fractures and bone defects, restore the normal anatomical shape of maxillofacial, maintain good occlusal relationship and language function. The template guides the position of the implant by determining the position of the prosthesis before the operation, so that the prosthesis can restore the patient's good function and beauty. Using the oral 3D printer technology, the anatomical structure of the implant area can be analyzed before the operation, the position and direction of the implant can be accurately captured, and the implant guide plate can be made to convert the designed implant position before the operation into the implant area of ​​the patient after the operation , So as to ensure excellent planting. With the trend of oral digitization, oral 3D printer technology not only brings changes to our concept, but also brings subversive development to oral clinics. The era of digital stomatology represented by oral CBCT diagnostic technology, digital chair impression acquisition technology, CAD/CAM restoration design and 3D printing processing technology has arrived. The dental industry is about to usher in the digital era of industrial development, and the entire dental industry will undergo disruptive changes.