Under the concept of oral digitization, oral scanning serves as the entrance. Intraoral digital acquisition systems allow dentists to capture the surface of a prepared tooth in three dimensions, making an almost completely digital workflow possible.
Traditional silicone film removal requires repeated silicone film removal, mold casting and subsequent design and processing. It usually takes 2-4 weeks to complete the entire tooth restoration treatment, and the treatment process is very complex. Slow and has a failure rate of up to 30%. The digital intraoral scanner allows dentists to scan directly into the patient's mouth to obtain a three-dimensional digital model of the teeth, and then sends it to the CAD/CAM platform for design and processing. The denture can be made in as little as 2 hours. Comparing the two aspects, the use of digital intraoral scanners has greatly improved the diagnostic efficiency and quality of dental restoration, which is an inevitable trend in the current digital development of dental medicine.
However, the technical difficulty of intraoral scanner products is very high. 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 requirements for tooth restoration (<50 microns), the miniaturization and measurement accuracy of three-dimensional scanning equipment are required to be very high. What is more difficult is that intraoral scanning must be performed continuously by doctors from different positions and angles in the patient's mouth to obtain a complete three-dimensional digital model. Therefore, reducing the superposition error of three-dimensional data obtained from different positions is a greater technical problem.
Germany first introduced the 3D oral scanning system in the early 1990s. Due to the high technical threshold, there are currently only a few intraoral scanners available for clinical use in the world. In China, currently only the DL-100 intraoral scanner developed and produced by Guangdong Langcheng Medical has a domestic registration certificate and has been clinically verified.
Guangdong Langcheng Medical Device Technology Co., Ltd. ("Langcheng Medical" for short) was established in October 2013. It is a national high-tech enterprise founded by Dr. Lu Jian, who graduated from the California Institute of Technology in the United States and returned to China. The company's production base is located in the beautiful Songshan Lake National High-tech Industrial Development Zone in Dongguan, and has R&D branches in Los Angeles, USA, and Tsinghua University Research Institute in Shenzhen. The company focuses on the independent research and development and industrial application of Dr. Lu Jian's handheld 3D scanning technology in the oral medical industry. It successfully developed China's first 3D intraoral scanner and was awarded the Class II medical device certification by the State Food and Drug Administration in September 2015. Product registration certificate, ISO13485 certification and CE certification were obtained in March 2017. At present, the company has more than 10 domestic and foreign patents, and its main business is the research and development, production and sales of Class II medical devices such as intraoral scanners and dental optical powder spraying. Since entering the domestic market in 2016, Langcheng DL-100 intraoral scanner has been used clinically in famous dental hospitals such as Peking University Dental Hospital, Fourth Medical University Dental Hospital, and Wuhan University Dental Hospital. In 2017, Langcheng DL-100 intraoral scanner began to enter the international market and has been sold to Italy, Israel, Japan, Taiwan and other countries and regions, breaking through the market situation of globalization of domestic digital products. Based on the most cutting-edge intraoral scanning products in the field of oral digitization, Langcheng Medical is committed to providing doctors with convenient and fast intraoral impression taking, improving patient comfort, providing accurate digital models for denture processing, and realizing a complete digital solution for oral medical care. .
Technical principle of Langcheng intraoral scanner:
The technical aspect of intraoral scanning includes two steps. First, the three-dimensional data point cloud of the tooth surface is collected at a single position using a three-dimensional imaging method. ; Then during the movement of the intraoral camera, the three-dimensional data collected at different locations are continuously superimposed, and finally a complete three-dimensional data model is formed. Langcheng intraoral scanner adopts the special imaging principle of single-lens stereoscopic imaging + multi-aperture spectroscopy, and has designed the smallest product among similar products. The DL-100 intraoral scanner acquires multi-angle two-dimensional photos of the same tooth surface at a single location, and then obtains an accurate color three-dimensional point cloud at that location through phase contrast comparison.
Features of Langcheng intraoral scanner
1) The smallest scanning system
The most novel and unique thing about Langcheng DL-100 intraoral scanner is its use Using fewer optical and electronic components to achieve complex three-dimensional imaging requirements, we designed the smallest oral optical scanning product on the market. The part that extends into the mouth is only 13mm x 19mm, which can easily scan any position in a small oral cavity. teeth. At present, the only few products abroad are difficult to achieve small enough miniaturization design.
2) WYSIWYG real-time color dynamic scanning, extremely accurate
Langcheng intraoral scanner uses original and internationally leading handheld 3D technology to perform Dynamic scanning of the oral cavity in video mode can achieve ultra-high-precision three-dimensional data scanning, with a scanning accuracy of 20 microns, and can stably scan full crowns and inlays
3) Excellent clinical practicability
Due to the use of monocular stereo imaging, the measurement depth of DL-100 can reach 22 mm, which is much higher than the 10-15 mm usage distance of competitive products. At the same time, the unique feature point tracking technology allows doctors to move the scanner more conveniently in the oral cavity and quickly restore the scanner imaging position, which greatly improves the clinical practicality of the product;
4) Ultra-clear Color 3D model reconstruction
DL-100 adopts a unique 3D reconstruction method, using multiple channels of scanned data to superimpose, and finally generates a high-precision 3D model. Users can view the accurate color three-dimensional model of the scanned teeth in the interface. The doctor can rotate, zoom and other operations to view the scanned model, and can also distinguish and mark the gums and set the insertion path. Thus, an exclusive treatment plan can be formulated for the patient according to his specific condition;
5) Open data format
Compared with similar foreign products, the three-dimensional data output format of this project’s product It is an industry-standard open STL file that can be used on any CAD/CAM processing platform that is currently widely used in denture processing, giving users great freedom in the choice of materials and processing methods. At the same time, the Langcheng rapid chairside system equipped with the PL900S cutting machine, based on the minimum diameter 0.4mm bur and the original "carving" cutting strategy, can complete the cutting of a fine-shaped restoration in 15 minutes