Adjustment method for rotary fulcrums in dental orthodontics

Abstract

The invention provides an adjustment method for rotary fulcrums in dental orthodontics. The adjustment method includes the steps of S1, according to a teeth model, determining an occlusal surface; S2, according to the occlusal surface, generating a occlusal axis; S3, acquiring a normal axis and a tangential axis which are initialized by each tooth; S4, calculating a central point of an intersecting contour line of the occlusal surface and the surface model of the tooth, wherein the rotary fulcrum of the tooth is formed in the central point; S5, generating an initial automatic rotating axis of the tooth; S6, moving the normal axis along the plane parallel to the occlusal surface and penetrating the rotary fulcrum of the tooth to enable the normal axis to be parallel to a check tongue direction or a lip tongue direction; S7, adjusting the automatic rotary axis to enable the same to penetrate the rotary fulcrum of the tooth to be mutually vertical to the normal axis and the tangential axis in the step S6. With the method, the problem that the actual correction effect is different from what is anticipated can be solved; modeling is performed on the basis of a dental crown and a teeth root, and the rotary fulcrums are effectively adjusted according to modeling of the dental crown and the teeth root, so that the most ideal orthodontics effect is acquired.

Description

technical field [0001] The invention relates to the technical field of orthodontics, in particular to a method for adjusting a rotational fulcrum in orthodontics. Background technique [0002] At present, for orthodontics, the crown surface model can be segmented from the patient's intraoral scan data, and the crown surface model can be rotated and translated to align the teeth, and then generate a sequence of teeth, and finally, according to the sequence of teeth Manufactured a series of aligners. [0003] The above-mentioned orthodontic methods mainly rely on the accuracy of the tooth surface model and the tooth rotation fulcrum. However, currently there is no tooth root model in the tooth arrangement process, so the rotation fulcrum can only be at the bottom of the crown surface model or other fixed positions. The above-mentioned rotation fulcrum is likely to be inconsistent with the fulcrum in the actual orthodontic process, so the generated braces act on the patient, w...

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned orthodontic methods mainly rely on the accuracy of the tooth surface model and the tooth rotation fulcrum. However, currently there is no root model in the process of tooth arrangement, so the rotation fulcrum can only be at the bottom of the crown surface model or other fixed positions

However, the above rotation fulcrum is likely to be inconsistent with the fulcrum during the actual orthodontic process, so the generated braces act on the patient, which may cause the orthodontic (rotation) direction of the patient to be inconsistent with the expectation during the treatment process.

In this way, in mild cases, the correction effect is not ideal, and in severe cases, the teeth may even move out of the alveolar bone, resulting in serious medical accidents

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