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Orthodontic arch wire variable-angle division method based on bending point density

An orthodontic arch wire and variable angle technology, which is applied in the fields of arch wire, orthodontics, medical science, etc. Wire bending point sequence planning and other issues

Active Publication Date: 2020-08-28
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When planning the sequence of bending points of personalized archwires, the bending complexity of each bending point on the personalized orthodontic archwire is relatively low, that is, the unit angular distance ratio of each bending point is relatively small. When the unit angular distance ratio of each bending point on the archwire curve is less than the upper limit value of the unit angular distance ratio set according to the robot bending orthodontic archwire, due to the particularity of the bending point distribution, in this When the variable-angle domain is divided into personalized orthodontic archwires, the existing orthodontic archwire forming control point bending sequence planning calculations are relatively large, and the planning period is relatively time-consuming. The current orthodontic archwire bending technology The field lacks a method for planning the bending point sequence of such personalized orthodontic archwires, and cannot realize efficient digital bending of such personalized orthodontic archwires

Method used

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  • Orthodontic arch wire variable-angle division method based on bending point density
  • Orthodontic arch wire variable-angle division method based on bending point density
  • Orthodontic arch wire variable-angle division method based on bending point density

Examples

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Embodiment 1

[0050] Embodiment 1: as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 As shown, this specific embodiment adopts the following technical solution: a method for dividing the angle of an orthodontic arch wire based on the bending point density, and the specific implementation process of the method is:

[0051] Step 1. Variable angle domain division data import:

[0052] According to the patient's personalized orthodontic archwire curve with i forming control points, input the personalized orthodontic archwire curve forming control point information set M={m 1 , m 2 , m 3 ,...,m i}, m i =(u i , v i ,w i )' is the coordinates of each personalized orthodontic archwire curve forming control point, each orthodontic archwire curve forming control point m i Each corresponds to a forming control point robot motion information unit n i , the robot motion information set of the input forming control point is N={n 1 , n 2 , n 3 ,...,n i}, n i Indicates the coordi...

Embodiment 2

[0082] Embodiment 2: as figure 2 , image 3 , Figure 4 , Figure 5 As shown, in a personalized orthodontic archwire curve containing i=22 bending points (the left and right end points of the orthodontic archwire do not participate in the bending of the archwire), the bending sequence planning based on the variable angle division of the bending point density is carried out In the process, it is assumed that the number of the bending variable angle domain intervals finally obtained is n=8, according to the variable angle domain interval information set B={b in step seven 1 , b 2 ,...,b g}, the number of bending points in each variable angle domain interval is obtained as Each bending variable angle domain interval (b 1 , b 2 ,...,b g ) has a bending point density of Comparing the bending point density of each variable angle domain interval, there is Bending point density in each variable angle domain interval Arrange the 8 variable-angle domain intervals in desc...

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Abstract

The invention discloses an orthodontic arch wire variable-angle division method based on the bending point density, and relates to the field of orthodontic arch wire bending. According to a personalized orthodontic arch wire curve of a patient, based on a orthodontic arch wire curve forming control point information set and a robot motion information set of forming control points, when the unit angular distance ratio of each bending point on the orthodontic arch wire curve of the patient is smaller than a unit angular distance ratio upper limit value, a variable angle region bending point density upper limit value is set by combining with the orthodontic arch wire bending characteristics of a robot, the orthodontic arch wire variable-angle division method based on the bending point densityis obtained, variable angle regions are divided and arranged, and finally a bending sequence of all the bending points is obtained. According to the method, the bending point density of the divided variable angle regions is subjected to quantitative constraint, so that the reasonability of variable angle region division is ensured, and the planning efficiency is improved.

Description

technical field [0001] The patent of the invention relates to a method for dividing the variable angle of an orthodontic arch wire based on the bending point density, and belongs to the technical field of orthodontic arch wire bending. Background technique [0002] At present, malocclusion is an oral disease with a high incidence in the population. Malocclusion not only affects the development of the patient's jaw and facial soft tissue, oral health and function, appearance and pronunciation, but may even lead to dyspnea and Gastrointestinal dysfunction and other serious consequences, fixed orthodontic treatment is a commonly used and effective orthodontic treatment in modern stomatology, and the bending accuracy of orthodontic arch wire is the key to fixed orthodontic treatment. With the development of digital technology With continuous development, the processing of arch wires in orthodontic appliances is developing towards digitalization. Efficient planning of the bending...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61C7/20A61C7/02
CPCA61C7/002A61C7/026A61C7/20
Inventor 姜金刚郭亚峰吴殿昊张永德闵兆伟曾阳
Owner HARBIN UNIV OF SCI & TECH