Manufacturing method of customized tongue-side invisible aligner

Abstract

Disclosed is a manufacturing method of a customized tongue-side invisible aligner, and belongs to the technical field of orthodontic treatment. The manufacturing method comprises steps of: performing three-dimensional scanning of a patient's teeth via laser to obtain image information; performing simulative alignment of teeth on a computer to obtain an ideal tooth alignment effect, and determining a tooth model scheme; printing the tooth model scheme of simulative alignment by using a 3D printer; designing three-dimensional models of an aligning bracket, a bracket baseplate, and an aligning steel wire, which are special for each tooth, by computer aided design and manufacturing technology. The manufacturing method is characterized by further comprising: carving the aligning bracket by adopting stainless steel via a numerically-controlled machine tool; selecting a stainless steel board, and carving a shape, identical to the teeth, at the lower surface of the stainless steel board via the numerically-controlled machine tool; and selecting a stainless steel mesh and welding the stainless steel mesh to the lower surface of the stainless steel board. According to the manufacturing method, an integrate bracket is manufactured by directly adopting three-dimensional image information, so that the bracket is high in precision and good in comfort during an orthodontic treatment process.

Description

technical field [0001] The invention belongs to the technical field of orthodontics, and in particular relates to a manufacturing method of a personalized lingual invisible aligner. Background technique [0002] Orthodontics (orthodontics) has experienced more than a century of development since Dr. Angle founded the world's first orthodontic specialist school as a branch of stomatology in 1901. In the first 30 years, the development of orthodontic appliances received the most attention. The invention of the North American square wire arch appliance and the European functional orthodontic appliance are undoubtedly breakthroughs. The former controls the movement of teeth in three dimensions and provides a guarantee for the establishment of a good relationship; the latter It is used for early treatment to regulate the growth of the jaw. In the following 30 years, the diagnosis and correction design of dislocation deformity became a research hotspot, and the advent of X-ray ce...

AI Technical Summary

Problems solved by technology

However, their manufacturing brackets all adopt traditional casting technology, and the precision and cohesion of the brackets produced are poor, and the accuracy can only reach 0.05 mm at most, because the lingual brackets of the aligner are placed in a fan-shaped radial bonding On the lingual side of the teeth, three sequences of bending of the tooth position need to be placed in the bracket, and the particularity of the bonding position of the lingual bracket makes the precision requirement of the lingual bracket higher than that of the general labial bracket, for example, When the missing angle of the common labial bracket is 1 degree, the missing angle of the tooth angle is less than 1°, and the radial angle of the lingual bracket may be lost by 2°. Therefore, the accuracy of the precision casting process is only 0.05-0.80MM, which is difficult to meet the lingual bracket. At the same time, Guangzhou Ruitong Biotechnology Co., Ltd. and 3M Company of the United States designed the bonding base plate of the orthodontic bracket to simulate the overall base plate of the mesh. Although the bonding area of ​​the base plate designed in this way is large, the bonding strength Poor, and due to the large bonding area of ​​the bottom plate, it is easy to contact and rub against the gums, causing inflammation of the gums

Among the existing patents, the notification number: CN 103800086 A, "A Manufacturing Method for Personalized Labial and Lingual Orthodontic Appliances", the manufacturing method of the patented orthodontic appliance adopts the lingual invisible orthodontic technology, and then uses three-dimensional scanning to utilize Powder metallurgy—discharge plasma sintering system completes the manufacture of the overall bracket through the production of powder, pressing molding, sintering, and post-processing, and properly polishes the personalized bracket, because it also needs to use the patient’s teeth. The three-dimensional imaging information including the patient's teeth, dentition, alveolar bone and cranio-maxillofacial bone structure is obtained by three-dimensional scanning to make a sintered powder metallurgy mold, which is then pressed into shape with the mold, and the post-sintering process completes the production of the overall bracket. This process uses 3D imaging information to make the overall bracket processing chain length, which affects the accuracy of the overall bracket; in addition, the overall bracket completed by powder metallurgy pressing, sintering, and post-processing has more rigidity and insufficient elasticity, which will cause Affect the stability and safety of patients in the process of orthodontics

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