Space variable-radius spherical domain division method for orthodontic arch wire bending sequence planning

Abstract

The invention discloses a space variable-radius spherical domain division method for orthodontic arch wire bending sequence planning, and relates to the technical field of orthodontic arch wire bending. The space variable-radius spherical domain division method for orthodontic arch wire bending sequence planning is established according to a personalized orthodontic arch wire curve of a patient, based on an orthodontic arch wire curve bending point information set and a bending point robot bending information set, and in combination with the movement characteristics of a robot bending orthodontic arch wire. The technical key points are as follows: variable-radius spherical domain division data is imported; the upper limit value of a spherical domain limiting parameter is set; the radius and the sphere center of a divided spherical domain are determined; a reasonable bending spherical domain is defined; whether spherical domain division is continued or not is judged; and with the density of spherical domain bending points as an index, all spherical domains are arranged in a descending order, the bending point sequence of the spherical domains is specified, and the final bending point bending sequences T1 and R1 are output. According to the method, the space arch wire curve is divided into regions by the variable-radius spherical domains, so that the accuracy of orthodontic archwire bending planning can be improved, and the problem of interference in the process of bending the orthodontic arch wire by the robot is avoided.

Description

technical field [0001] The patent of the present invention relates to a space-variable-radius sphere division method for orthodontic archwire bending sequence planning, 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 orthodontic archwire by the robot, there may be interference b...

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Problems solved by technology

[0005] Aiming at the above problems, the present invention proposes a spatial variable-radius sphere division method for orthodontic archwire bending sequence planning, which solves the lack of direct bending of spatial orthodontic archwire curves in the current orthodontic archwire bending technology field. In order to obtain a reasonable orthodontic archwire bending sequence, a reasonable division basis is put forward in the process of bending sequence planning, and quantitative constraints are placed on the density of bending points and the complexity of bending in the divided area, and finally a method that meets the orthodontic The bending sequence of the bending point distribution information on the curve of the orthodontic archwire is personalized, so as to maximize the advantages of the bending robot, avoid the deviation of the bending sequence planning caused by the curve conversion, and ensure the normal operation of the orthodontic archwire bending process , improve the efficiency of orthodontic arch wire bending planning, and avoid the problem of interference in the process of robot bending orthodontic arch wire

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