Design method and application of a invisible aligner

Abstract

The invention discloses a design method of an invisible aligner and its application. The invention adopts a step-by-step alternate method, and only moves a single tooth each time, so that the target tooth moves in place, shortens the amount of single-step movement, and increases the number of steps for correction. The overall correction time is shortened, the use of additional anchorage is avoided, and a good correction effect can be achieved in the end. The design method of clear aligners can be applied to the manufacture of clear aligners that push molars away or close the gap between teeth.

Description

technical field [0001] The invention belongs to the medical field, and relates to a design method of an invisible aligner and an application thereof. Background technique [0002] Dental crowding is the most common case of malocclusion, and 60% to 70% of malocclusion patients have dental crowding. The methods to solve dentition crowding in the course of orthodontic treatment include tooth extraction, proximal surface deglazing, arch expansion, and molar molar displacement, etc. Among them, tooth extraction and proximal surface deglazing will cause irreversible damage to teeth, and patients are more likely to suffer clinically. rejection. Therefore, the use of arch expansion or molar molar displacement is approved in the course of treatment. [0003] In the invisible orthodontic process, the tooth movement method, the movement amount of each appliance and the movement amount of a certain tooth in each appliance can be designed in advance. Through the pre-design, the treatm...

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Problems solved by technology

But this method has the following disadvantages: 1. It is easy to produce uncontrollable factors, such as when the gap between two teeth is large, it is reflected on the invisible aligner, which is a concave structure, which is easy to make it twice. The bow of the orthodontic appliance is deformed during the wearing process. After wearing it, it is often impossible to correct it according to the pre-designed method, the expression rate is reduced, and the corrective effect cannot be achieved in the end.

2. The overall orthodontic time of this method is relatively long, such as moving multiple teeth from the canines to the second molars, and the simple moving time is as long as 2-3 years, which is difficult for patients and doctors to accept

3. Using this method also requires the use of additional anchorage, because at least two adjacent teeth (unilateral dental arch) move in each step with this method, which may cause insufficient anchorage, resulting in teeth that cannot follow the pre-designed The method moves, and there is a phenomenon of incompatibility. There are theories that when a certain tooth is moved farther, the greater the reaction force on the adjacent teeth, the farther the teeth are from each other, the reaction force will be attenuated accordingly

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