Traditional silica gel membrane extraction needs repeated silica gel membrane extraction, mold inversion and subsequent design and processing, and it usually takes 2-4 weeks to complete the whole tooth restoration treatment. The treatment process is very slow, and the failure rate is as high as 30%. Digital intraoral scanner allows dentists to scan directly in the patient's mouth to obtain a three-dimensional digital model of teeth, and then send it to the CAD/CAM platform for design and processing. Dentures can be made in as little as 2 hours at the earliest. In contrast, the use of digital dental scanner has greatly improved the diagnosis and treatment efficiency and quality of prosthodontics, which is the inevitable trend of digital development of stomatology at present.
However, the technical difficulty of intraoral scanner products is very great. Because of the small space in the oral cavity, the complex environment (the influence of blood and saliva on three-dimensional imaging) and the high clinical accuracy of dental restoration (
Three-dimensional oral scanning system was first introduced by Germany in the early 1990s. Due to the high technical threshold, there are only a few oral scanners available for clinical use in the world. At present, only the DL- 100 dental scanner developed and produced by Guangdong Longcheng Medical Co., Ltd. has a domestic registration certificate and has been verified in clinic.
Guangdong Cheng Lang Medical Device Technology Co., Ltd. (hereinafter referred to as "Cheng Lang Medical") was established on 20 13 10, which is a national high-tech enterprise founded by Dr. Lv Jian, a graduate of California Institute of Technology. The company's production base is located in the beautiful Dongguan Songshan Lake National High-tech Industrial Development Zone, and has an R&D branch and Shenzhen Tsinghua University Research Institute in Los Angeles. The company focuses on the independent research and development and industrial application of Dr. Lv Jian's hand-held 3D scanning technology in the stomatology industry, successfully developed the first 3D oral scanner in China, and obtained the second-class medical device product registration certificate of the State Medical Products Administration in September 20 15, and obtained the ISO 13485 certification and ce certification in March 20 17. At present, the company has many patents 10 at home and abroad, and its main business is the research and development, production and sales of second-class medical devices such as oral scanners and oral optical powder spraying. Since 20100 entered the domestic market, Cheng Lang DL- 100 dental scanner has been applied in famous stomatological hospitals such as Peking University Stomatology, Fourth Medical University Stomatology and Wuda Stomatology. In 20 17, Cheng Lang DL- 100 oral scanner began to enter the international market, and has been sold to Italian, Israeli, Japanese, Taiwan Province and other countries and regions, breaking through the global market situation of domestic digital products. Based on the most advanced intra-oral scanning products in the field of oral digitalization, Cheng Lang Medical is committed to providing doctors with convenient and quick intra-oral mold taking, improving the comfort of patients, providing accurate digital models for denture processing, and realizing a complete digital solution for oral medicine.
Technical principle of Cheng Lang dental scanner;
The technical level of intraoral scanning includes two steps. Firstly, the three-dimensional data point cloud of tooth surface is collected at a single position by using three-dimensional imaging method; Then, during the movement of the camera in the oral cavity, the 3D data collected at different positions are continuously superimposed, and finally a complete 3D data model is formed. Cheng Lang Oral Scanner adopts the special imaging principle of Dan Toujing stereo imaging and multi-aperture beam splitting to design the smallest product of its kind. DL- 100 intraoral scanner obtains multi-angle two-dimensional photos of the same tooth surface at a single position, and then obtains the accurate color three-dimensional point cloud at this position by comparing the phase difference.
Characteristics of Cheng Lang Oral Scanner
1) Minimum scanning system.
The most novel and unique feature of Cheng Lang DL- 100 intra-oral scanner is that it uses fewer optical and electronic components to meet the complex requirements of three-dimensional imaging. The smallest oral optical scanning product on the market at present is designed, and only 13mm x 19mm extends into the oral cavity, which can conveniently scan teeth in any position in the narrow oral cavity. At present, only a few foreign products are difficult to achieve small enough miniaturization design.
2) WYSIWYG color real-time dynamic scanning with high accuracy.
Longcheng Dental Scanner adopts the original hand-held three-dimensional technology with international leading level, and carries out oral dynamic scanning based on video mode, which can realize ultra-high precision three-dimensional data scanning with scanning accuracy of 20 microns, and can stably scan all crowns and inlays.
3) Good clinical practicability.
Because of monocular stereo imaging, the measurement depth of DL- 100 can reach 22 mm, which is much higher than that of competing products10-15 mm. At the same time, the unique feature point tracking technology allows doctors to move the scanner in the oral cavity more conveniently and quickly restore the imaging position of the scanner, which greatly improves the clinical practicability of the product.
4) Ultra-clear color 3D model reconstruction
DL- 100 adopts a unique 3D reconstruction method, and finally generates a high-precision 3D model by superimposing scanning data from multiple channels. Users can view the accurate color three-dimensional model of the scanned teeth in the interface, and doctors can rotate and zoom to view the scanned model, so as to distinguish and mark the gums and set the position. Therefore, according to the specific situation of the patient, a special treatment plan should be formulated for him;
5) Open data format
Compared with similar products abroad, the three-dimensional data output format of this project product is industrial standard open STL file, which can be used on any CAD/CAM processing platform that has been widely used in denture processing, giving users great freedom in the choice of materials and processing parties. At the same time, based on the rotating needle with the minimum diameter of 0.4mm and the original "carving" cutting strategy, the Cheng Lang fast chair edge system equipped with PL900S cutter can cut a fine prosthesis within 15 minutes.