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

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...

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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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