Digitalized making method of dental orthodontic appliance and fixed appliance

Abstract

The invention discloses a digitalized making method of a dental orthodontic appliance. The digitalized making method comprises the steps of acquiring CT (Computed Tomography) data and carrying out intraoral scanning; reconstructing a three-dimensional oral tissue model to obtain bones and teeth; reconstructing intraoral scanning data to obtain gingivas and accurate teeth; compounding two models to obtain a composite model; calculating key parameters including tooth movement amount, required orthodontic force and moment, and force applying mode and the like, discharging a treated target dentition; accurately calculating a mode of moving each tooth and a movement distance or an angle, calculating a required force and moment; calculating required shape and size parameters of an SMP force applying mechanism, and further designing a force applying unit; generating an immobilizing structure according to the three-dimensional model of each tooth on the basis of the surface; designing accessories according to certain special movements so as to obtain an integral structure of an integrated orthodontic appliance; making an integrated orthodontic appliance by using a three-dimensional printer integrally formed from multiple materials, and providing the integrated orthodontic appliance for being clinically used by a doctor; and during clinical use, heating the integrated orthodontic appliance to a phase change temperature to ensure that the force applying unit becomes soft and is conveniently adhered and fixed on the surface of the tooth. An integrated fixed appliance manufactured by using the method comprises a force applying unit, an immobilizing unit and accessories.

Description

Background technique [0001] Fixed oral orthodontics is aimed at tooth alignment deformity or malocclusion (occlusion is a word, the same below), using orthodontic devices composed of arch wires, brackets, etc., to apply mechanical orthodontic force and torque to the teeth, and adjust the facial bones, teeth, etc. The balance and coordination between the maxillofacial and maxillofacial muscles will improve the facial shape, align the dentition and improve masticatory efficiency after a period of orthodontic treatment. At the beginning of the 20th century, American dentist Edward Angle, known as the father of modern orthodontics, began to design dental appliances. In 1928, he introduced the square wire arch orthodontic technology, which laid the foundation of modern orthodontics. In 1970, American orthodontist Andrews proposed six criteria for the best natural occlusion, and invented the straight wire appliance based on the square wire appliance, which is more convenient to use....

AI Technical Summary

Problems solved by technology

Therefore, the current straight wire appliance does not consider individual differences, and the correction force provided by it is not accurate, and it is easy to cause unnecessary movement of the teeth. It is necessary to continuously adjust the treatment plan and adjust the appliance to compensate and correct during the treatment process. Prolongs treatment time and increases treatment risks

[0004] On the other hand, in the clinical implementation process, doctors need to manually determine the position of the brackets and paste them, and the workload is very heavy.

The recently developed guide plate made by calculation aided design and three-dimensional printing can help doctors quickly find the correct position of the tooth surface on the bracket, and reduce the labor intensity of doctors to a certain extent, but the design process is complicated and the accuracy is difficult. ensure

However, during the course of one to two years of correction, patients need to return for regular visits to replace the arch wire, causing inconvenience to patients and increasing treatment costs

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