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An orthodontic archwire variable angle division method based on the sum of the angle-to-distance ratio of bending points

An orthodontic archwire and variable-angle technology, which is applied in the fields of archwire, orthodontics, medical science, etc., can solve the lack of personalized orthodontic archwire bending point sequence planning, and the inability to personalize orthodontic archwire efficient digitalization. The problems of bending and planning are time-consuming, so as to improve the division efficiency, reduce the calculation scale, and reduce the number of cycles.

Active Publication Date: 2021-05-28
HARBIN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] When planning the sequence of bending points of personalized archwires, the distribution of bending points on personalized orthodontic archwires is relatively scattered, that is, the unit bending point density of each bending point on the curve of orthodontic archwires is very small. When the unit bending point density value of each bending point on the arch wire curve is less than the upper limit value of the unit bending point density set according to the robot bending orthodontic archwire, due to the particularity of the bending point distribution, When dividing this kind of personalized orthodontic archwire into variable angle domains, the existing orthodontic archwire forming control point bending sequence planning calculation is relatively large, and the planning period is relatively time-consuming. At present, the orthodontic archwire In the field of bending technology, there is a lack of methods for planning the bending point sequence of such personalized orthodontic archwires, and it is impossible to realize efficient digital bending of such personalized orthodontic archwires

Method used

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  • An orthodontic archwire variable angle division method based on the sum of the angle-to-distance ratio of bending points
  • An orthodontic archwire variable angle division method based on the sum of the angle-to-distance ratio of bending points
  • An orthodontic archwire variable angle division method based on the sum of the angle-to-distance ratio of bending points

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Embodiment 1

[0042] 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 ratio of the angle and distance of the bending point, and the specific implementation process of the method is as follows:

[0043] Step 1. Variable angle domain division data import:

[0044] 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 )', 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 ...

Embodiment 2

[0066] 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 based on the angle-to-distance ratio of the bending points and the variable angle division is carried out In the process of system sequence planning, assuming that the number of variable-angle domain intervals finally obtained is n=8, according to the variable-angle domain interval information set B={b in step 6 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 ) and the angle distance ratio of the bending point is Comparing the sum of the angle-to-distance ratios of the bending points in each variable-angle domain interval, there is The sum of the angle-to-distance ratios of t...

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Abstract

The invention discloses a method for dividing an orthodontic archwire variable angle based on the ratio of the angle-to-distance ratio of bending points, which relates to the field of orthodontic archwire bending. Curve forming control point information set, robot motion information set of forming control points, when the unit bending point density of each bending point on the orthodontic archwire curve of the patient is less than the upper limit of the unit bending point density, combined with robot bending The characteristics of the orthodontic archwire, set the angle-to-angle ratio and the upper limit of the bending point in the variable angle domain, and obtain a method for dividing the orthodontic archwire variable angle based on the angle-to-angle ratio of the bending point, and divide and arrange the variable angle Domain, finally get the bending sequence of each bending point. The invention ensures the rationality of the division of the variable angle domain and improves the planning efficiency by quantitatively constraining the complexity of the division of the variable angle domain.

Description

technical field [0001] The patent of the invention relates to a method for dividing the variable angle of an orthodontic archwire based on the sum of the angle-to-distance ratios of bending points, and belongs to the technical field of orthodontic archwire bending. Background technique [0002] Malocclusion is the third largest oral disease that threatens human health, and it has a high incidence rate in the population. In modern stomatology, fixed orthodontic treatment is a commonly used and effective orthodontic treatment, and the bending of the orthodontic archwire Manufacturing is the key to fixed orthodontic technology. In recent years, under the influence of digital manufacturing technology, the traditional oral manufacturing process is undergoing revolutionary changes. The field of orthodontics has also benefited from digital technology. The processing of arch wires in orthodontic appliances It is developing towards digitalization, but the efficient planning of bendin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61C7/20A61C7/02
CPCA61C7/002A61C7/026A61C7/20
Inventor 姜金刚郭亚峰左晖姚亮张永德吴殿昊
Owner HARBIN UNIV OF SCI & TECH