Method for determining division radiuses of planar equal-radius circular regions based on sum of angle pitch ratios of bending points of orthodontic arch wires

Abstract

The invention discloses a method for determining division radiuses of planar equal-radius circular regions based on the sum of angle pitch ratios of bending points of orthodontic arch wires, and relates to the technical field of bending of the orthodontic arch wires. Aiming at a type of orthodontic arch wire curves with relatively low bending point density, the method for determining the divisionradiuses of the planar equal-radius circular regions based on the sum of the angle pitch ratios of the bending points of the orthodontic arch wires is established by combining with movement characteristics of a robot during bending of the orthodontic arch wires based on bending point information sets of the orthodontic arch wire curves and robot bending information sets of the bending points. Thetechnical point is as follows: importing circular region division data, and converting an orthodontic arch wire curve T into a planar curve T'; determining an initial value n of division number of theequal-radius circular regions according to angle pitch ratio information of the bending points; dividing equal-radius determination regions; searching optimal division number; and outputting divisionradiuses requal of the equal-radius circular regions with reasonable angle pitch ratios. According to the method, the number of trial-divided circular regions is determined and judged by virtue of the sum of the angle pitch ratios, division radius values of the equal-radius circular regions with the reasonable angle pitch ratios are determined, the division efficiency of the equal-radius circularregions is improved, and the bending planning efficiency of the orthodontic arch wire is improved, so that the problems of interference and bending complexity occurring when the orthodontic arch wires are bent by the robot are avoided.

Description

technical field [0001] The patent of the present invention relates to a method for determining the radius of a plane equal-radius circular domain division based on the ratio of the angle-to-distance ratio of orthodontic archwire 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...

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Problems solved by technology

[0005] In view of the above-mentioned problems, the present invention proposes a method for determining the radius of a plane equal-radius circular domain based on the ratio of the angle-to-distance ratio of orthodontic archwire bending points, and solves the lack of a class of overall units for planning in the current orthodontic archwire bending technology field. The method of determining the radius of the equal-radius circles in the orthodontic archwire bending sequence with a relatively small density of bending points. In the process of determining the radius of the equal-radius circles, a reasonable circle limit parameter is proposed, only for equal-radius circles Quantitative constraints on the bending complexity of the bending points divided by the domain, and a series of reasonable angle-to-distance ratio equal-radius circular domains with reasonable angle-to-distance ratios that meet the requirements for the bending complexity of the bending points in the region are obtained, and finally a curve suitable for planning such orthodontic archwires is obtained. The division radius of the equal-radius circular domain of the bending point provides convenience for the division method of the equal-radius circular domain used in the planning of a class of orthodontic archwire bending with special attributes, thereby improving the efficiency of orthodontic archwire bending planning , to maximize the advantages of the bending robot, to ensure the normal operation of the orthodontic archwire bending process, and to avoid the problem of interference in the process of bending such orthodontic archwires by robots

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