Orthodontic arch wire variable radius circular domain division method based on bending point angular distance ratio sum

An orthodontic arch wire and variable radius technology, which is applied in the fields of arch wire, orthodontics, medical science, etc., can solve the problem of high difficulty in bending

Active Publication Date: 2020-08-28
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

[0005] Aiming at the above problems, the present invention proposes a method for dividing the orthodontic arch wire variable radius circle based on the ratio of the angle-to-distance ratio of the bending points, which solves the lack of a relatively high density of bending points for a class of units in the current field of orthodontic arch wire bending technology. An e

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  • Orthodontic arch wire variable radius circular domain division method based on bending point angular distance ratio sum
  • Orthodontic arch wire variable radius circular domain division method based on bending point angular distance ratio sum
  • Orthodontic arch wire variable radius circular domain division method based on bending point angular distance ratio sum

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Embodiment 1

[0045] Embodiment 1: as figure 1 , figure 2 , image 3 As shown, the specific implementation mode adopts the following technical solution: a method for dividing the orthodontic archwire with variable radius circle based on the angle-to-distance ratio of the bending point, and the specific implementation process of the method is as follows:

[0046] Step 1. Data import of variable radius circular domain division and orthodontic archwire curve conversion:

[0047] According to the orthodontic archwire curve with i bending points of the patient, calculate and input the orthodontic archwire curve bending point information set T={t 1 , t 2 , t 3 ,...,t i},t i =(x i ,y i ,z i )' is the coordinates of each orthodontic archwire curve bending point, at each bending point t i The upper robot performs different bending movements, each orthodontic archwire curve bending point t i Each corresponds to a bending point robot bending information unit r i , the robot bending inform...

Embodiment 2

[0073] Embodiment 2: as figure 2 , image 3 As shown, in the process of planning the orthodontic archwire bending sequence based on the angle-to-distance ratio and the planar variable-radius circle division on a personalized orthodontic archwire curve containing i=22 bending points, it is assumed that the final The number of reasonable bending circle domains is n=8, and the number of bending points in each circle domain is In step 6, calculate the ratio of each reasonable angular distance to the curved circle domain (a 1 , a 2 ,...,a n ) and the angular distance ratio of the bending point Obtain the angle-to-distance ratio and information set of the bending point in the circular domain Comparing the angular distance ratio sum of the bending point of each reasonable angular distance ratio bending circle, there is Angle-to-distance ratio and Arrange the 8 circular domains in descending order for the index, so as to obtain the information set of the circular domains ...

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Abstract

The invention discloses an orthodontic arch wire variable radius circular domain division method based on bending point angular distance ratio sum, relates to the technical field of orthodontic arch wire bending. Aiming at an orthodontic arch wire curve with relatively small bending point density, based on an orthodontic arch wire curve bending point information set and a robot bending informationset of bending points, and in combination of the motion characteristics of a robot bending orthodontic arch wire, the orthodontic arch wire variable radius circular domain division method based on the bending point angular distance ratio sum is established. The method is technically characterized by comprising the following steps of converting an orthodontic arch wire curve T into a plane curve T'; performing setting and simplifying on circular domain limiting parameters; determining the radius and the circle center of the divided circular domain; defining a bending circular domain with a reasonable angular distance ratio; judging whether circular domain division is continued or not; and by taking the angular distance ratio of the bending points of the circular domain as an index, arranging the circular domains in a descending order, specifying the bending point sequence of the circular domains, and outputting the final bending point bending sequence T1 and R1. According to the method, the variable radius circular domain is used for dividing, the angular distance ratio sum of the bending points is used as a judgment condition, the orthodontic arch wire bending planning efficiencycan be improved, and the problem of interference in the orthodontic arch wire bending process of a robot is avoided.

Description

technical field [0001] The patent of the present invention relates to a method for dividing circle domains with variable radius of an orthodontic archwire based on the ratio of the angle-to-distance ratio of bending points, and belongs to the technical field of orthodontic archwire bending. Background technique [0002] Malocclusion is the third largest oral disease that endangers human health, showing a high incidence rate. In modern stomatology, fixed orthodontics is a commonly used and effective orthodontic treatment, and the bending of orthodontic archwires is a fixed In recent years, the key to orthodontic technology has been deeply influenced by digital manufacturing technology. The traditional oral manufacturing process is undergoing revolutionary changes. The field of orthodontics is also benefiting from digital technology. The processing of arch wires in orthodontic appliances is becoming digital. develop. [0003] In the process of bending the personalized orthodo...

Claims

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Application Information

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IPC IPC(8): A61C7/20A61C7/02
CPCA61C7/002A61C7/026A61C7/20
Inventor 姜金刚吴殿昊郭亚峰张永德闵兆伟曾阳
Owner HARBIN UNIV OF SCI & TECH
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