A Method for Dividing Orthodontic Archwires with Variable Radius Circles Based on the Angle-to-Distance Ratio of Bending Points

Abstract

The invention discloses a method for dividing the orthodontic archwire variable-radius circular domain based on the angle-to-distance ratio sum of the bending points, and relates to the technical field of orthodontic archwire bending. The orthodontic archwire curve, based on the orthodontic archwire curve bending point information set, the robot bending information set of the bending point, combined with the motion characteristics of the robot bending orthodontic archwire, establishes a method based on the angle-to-distance ratio of the bending point and the orthodontic archwire variable radius circle domain division method. The technical points are: converting the orthodontic archwire curve T into a plane curve T′; setting and simplification of the circle limit parameters; determining the radius and center of the circle; defining a reasonable angular distance ratio to bend the circle; judging whether to continue Carry out circle domain division; take the angle-to-distance ratio of the circle domain bending points as an index, arrange the circle domains in descending order, specify the order of the circle domain’s bending points, and output the final bending point bending order T 1 and R 1 . The invention divides the area by a circle with variable radius, and uses the sum of the angle-to-distance ratio of the bending point as the judgment condition, which can improve the efficiency of orthodontic archwire bending planning and avoid the problem of interference in the process of bending the orthodontic archwire by robots.

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...

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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 efficient bending sequence planning method for small orthodontic archwires, in order to avoid the situation of excessive bending difficulty when dividing the bending points of a class of orthodontic archwires with special attributes, which is conducive to the reasonable planning of bending sequences , and then realize the efficient digital bending of orthodontic archwires

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