Accessory avoiding method and device for filling undercut of tooth digital model, medium and equipment

Abstract

The invention provides an accessory avoiding method and device for filling an undercut of a tooth digital model, a medium and equipment. The method comprises the following steps: acquiring the tooth digital model; acquiring an accessory model and an undercut filling model of adjacent teeth according to the digital tooth model; performing collision calculation on the undercut filling model and the accessory model, calculating the shortest distance between the undercut filling model and the accessory model, and determining a collision detection result of the undercut filling model and the accessory model according to the shortest distance; after it is determined that the undercut filling model and the accessory model will collide according to the collision detection result, a virtual part model is arranged at the center position of the accessory according to the shape of the accessory model; and carrying out differencing processing on the virtual part model and the undercut filling model to obtain a target undercut filling model. According to the method, accessories can be automatically avoided in the process of generating the undercut filling grid, and the cost of manual repair is reduced.

Description

technical field [0001] The invention relates to the technical field of orthodontics, and in particular, to a method, device, medium and equipment for avoiding attachments for filling undercuts of a digital tooth model. Background technique [0002] Orthodontics mainly use force for correction, and appliance is a device for treating malocclusion, which can generate force. Appliances mainly include fixed appliances and invisible appliances. Fixed appliance is an important type of orthodontic appliance. This type of appliance is fixed on the teeth by adhesion or ligation. Fixed appliance has good retention and sufficient anchorage, and is suitable for applying various types of orthodontic force. And it is beneficial to the movement of most teeth, and can effectively control the direction of tooth movement. The invisible appliance can be freely removed and worn by the patient or doctor. When it is removed, the appliance is intact. It relies on the retention of the retaining rin...

AI Technical Summary

Problems solved by technology

In the tooth digital model, it is generally necessary to fill the undercut area, but in the process of filling the undercut area by filling the undercut grid, due to the need to design accessories in the orthodontic plan of the orthodontic appliance , but the existing method of filling undercuts does not take into account the influence of attachments. When the undercut filling mesh overlaps with the attachments, it is directly selected not to fill the undercuts automatically, but to fill the undercuts manually, so that It makes the process of filling the undercut complicated, and the way of manual repair will also affect the grid of filling the undercut

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