At present, most digital intra-oral scanning devices of various brands are manufactured based on optical principles, such as blue light-emitting diode technology and blue laser technology, which stitch multiple single images together, and then continuously collect image streams. The basic principle of mouth scanning is two imaging techniques, one is to take pictures and the other is to take videos, and then synthesize through computer programs to restore the color and high-precision intra-oral situation. The accuracy of the “photograph” type will be much higher than that of the “video type”, and the technical requirements are relatively higher. Of course, the distinguishing factors among various devices also include whether or not shading powder is needed to capture images. The technical level of intra-oral scanning consists of two steps. First, the three-dimensional data point cloud of the tooth surface is collected at a single location by three-dimensional imaging; then during the movement of the intra-oral camera, the three-dimensional data collected at different locations are continuously superimposed to form a complete Three-dimensional data model. Yicheng 3D intra-oral scanner adopts a special single-lens stereo imaging + multi-aperture spectroscopic imaging principle to design the smallest product of its kind.
The intraoral digital acquisition system allows the dentist to capture the surface of the prepared tooth in a three-dimensional space, which makes an almost completely digital workflow possible.
Traditional silica gel film removal requires repeated silicone film removal, mold casting and subsequent design and processing. It usually takes 2–4 weeks to complete the restoration of the entire tooth. The treatment process is very slow and the failure rate is as high as 30%. . The digital intra-oral scanner allows the dentist to directly scan the patient’s population to obtain a three-dimensional digital model of the tooth, and then send it to the CAD/CAM platform for design and processing. The denture can be made in as little as 2 hours. In contrast, the use of digital intra-oral scanners has greatly improved the diagnosis and treatment efficiency and restoration quality of dental restoration, which is an inevitable trend in the current digital development of dental medicine.
However, the technical difficulty of intra-oral scanner products is very large. Due to the small space in the oral cavity, the complex environment (the influence of blood, saliva, etc. on three-dimensional imaging), and the high clinical accuracy of tooth restoration (<50 microns), the miniaturization and measurement accuracy of the three-dimensional scanning equipment are required to be high. What is more difficult is that intra-oral scanning must be continuously scanned by the doctor from different positions and angles in the patient population to obtain a complete 3D digital model. Therefore, reducing the superimposition error of 3D data obtained at different positions is a greater technical problem.
For orthodontic patients, the patient chooses invisible correction, and the 3D impression preparation before treatment is a key operation step in the treatment. Traditional silicone rubber impressions cannot meet the current needs of treatment due to their poor patient experience and long preparation time, while orthodontic intra-oral scanners can avoid these problems.
The scanned orthodontic 3D model data can be directly connected to common invisible correction platforms such as Invisme. This not only has a good patient experience, but also shortens the impression upload time.
Whether it is a patient or a doctor, you can view the data very intuitively and observe the details of the teeth on the screen. The data scanned by the mouth, after computer processing, contains all the intraoral data required by the clinical and technical end.
These data are equivalent to the model to be taken in traditional repair, after all, the importance of the model in the clinical and technical side is self-evident. After the “model” is digitized, it can be directly uploaded to the cloud for convenient storage and traceability.
Since complete data in the patient’s mouth is obtained, a set of digital data sets can be connected to other data sets, such as facial scans or 3D X-ray images. This function can realize more comprehensive diagnosis and planning possibilities, and facilitate the provision of digital supporting services later.
These data can be used for computer-assisted diagnosis and treatment to repair and formulate treatment plans. The results are more stable and better than previous doctors’ experience based on experience. This is the core value of oral scanning in clinical applications.