Method for cutting bracket-free invisible appliance

A technology of invisible aligners and cutting methods, which is applied in medical science, dentistry, etc., can solve problems such as poor stability of cutting routes, and achieve high accuracy, fast generation speed, and good stability

Active Publication Date: 2015-01-21
杭州一牙数字口腔有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the disadvantages of the existing aligner cutting method that the cutting route needs to be designed repeatedly and the stability of the cutting route is poor, the present invention provides a cutting route that only needs to be designed once, has good stability and accuracy, and has no support Cutting method of slot clear aligner

Method used

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  • Method for cutting bracket-free invisible appliance
  • Method for cutting bracket-free invisible appliance
  • Method for cutting bracket-free invisible appliance

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Experimental program
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Embodiment Construction

[0047] The cutting method of the invisible aligner without brackets comprises the following steps:

[0048] 1) Generate a cutting trajectory curve on the tooth model, which includes the gingiva model and the dentition model:

[0049] (1.1) Obtain several points of the contact between the crown and the gums on each tooth and the points corresponding to each gingival papilla, connect these points in turn, and connect the adjacent points with a straight line; figure 1 and figure 2 shown;

[0050] (1.2) Smooth the broken line formed in step (1.1) to form a smooth curve. The principle of smoothing is: the line should not break away from the apex of the crown as much as possible, but the line can wrap the gingival papilla. The smooth curve is used as the cutting trajectory curve ,Such as image 3 shown. During the smoothing process, the lines should not deviate from the lowest point of the crown as far as possible, but should try to deviate downwards along the gingival papilla,...

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Abstract

The invention discloses a method for cutting a bracket-free invisible appliance. The method comprises the following steps: generating a cutting track curve on a tooth model, wherein the tooth model comprises a gum model and a dentition model; taking a coordinate system of the cutting track curve as a workpiece coordinate system SYHE, sampling the cutting track curve, wherein the number of sampling points is N, and direction vectors epsilon x, epsilon y and epsilon z and coordinates (X, Y) are formed in each sampling point; and generating a tool path of a five-axis processing center by virtue of the cutting track curve. The method disclosed by the invention has the advantages that the cutting track curve is automatically generated by scanning boundary points of the gum and dental crown on the tooth model, and the method is high in generating speed, high in stability, high in repeatability and high in accuracy.

Description

technical field [0001] The invention relates to a method for cutting the edge of an invisible appliance without brackets. technical background [0002] Bracketless invisible aligner is a computer-aided design and manufacture of transparent elastic material movable orthodontic devices. It is a series of continuous orthodontic devices that achieve the purpose of orthodontics by continuously moving teeth in a small range. [0003] At present, the manufacturing method of invisible aligners without brackets is: first obtain the patient's tooth model; use thermoplastic materials and plaster to fill and mold the tooth model, and obtain a physical model of the patient's teeth and jaws, in which the gingiva part is composed of thermoplastic materials , the tooth part is made of plaster; heating the thermoplastic material at the position of the tooth to be corrected in the physical model of the jaw to soften it, and then moving it to the target correction position; cooling the thermop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61C19/00
Inventor 吕建明肖遂陈飞舟朱彤
Owner 杭州一牙数字口腔有限公司
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