Invisible appliance design method and application

Abstract

The invention discloses an invisible appliance design method and application. By step-by-step alternation, one tooth is moved in one time to enable a target tooth to move in place, single-step movingamount is decreased, orthodontic steps are increased, integral orthodontic time is shortened, extra anchorage consumption is avoided, and great orthodontic effects can be obtained finally. The invisible appliance design method can be applied to manufacturing of molar distalization invisible appliances or manufacturing of tooth clearance closure invisible appliances.

Description

Technical field [0001] The invention belongs to the medical field, and designs a design method and application of an invisible appliance. Background technique [0002] Crowded dentition is the most common case of malocclusion. 60% to 70% of malocclusion patients have crowded dentition. In the process of correction, the ways to solve dentition crowding include tooth extraction, adjacent surface deglazing, arch expansion, and molar displacement. Among them, tooth extraction and adjacent surface deglazing will cause irreversible loss of teeth, and patients are also clinically more. Rejection. Therefore, the method of expanding the arch or pushing the molar far away is approved for use in the treatment process. [0003] In the process of invisible correction, the way of tooth movement, the amount of movement of each pair of appliances and the amount of movement of a certain tooth in each pair of appliances can be pre-designed. Through pre-design, the treatment method can be adjusted...

AI Technical Summary

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 the two teeth is large, it is reflected on the invisible aligner, which is a concave structure, which is easy to make here 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 treatment time using this method is relatively long, such as moving multiple teeth from the canines to the second molars, and the simple movement takes 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 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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