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Virtual bracket interaction method by means of layered depth distribution map and point set matching

A technology of depth distribution and brackets, which is applied in the field of virtual bracket interaction to achieve efficient and stable computing speed.

Inactive Publication Date: 2019-06-25
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there is a lack of methods that can correctly determine the fixed tooth brackets in the process of orthodontics

Method used

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  • Virtual bracket interaction method by means of layered depth distribution map and point set matching
  • Virtual bracket interaction method by means of layered depth distribution map and point set matching
  • Virtual bracket interaction method by means of layered depth distribution map and point set matching

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Embodiments of the present invention and concrete process are as follows:

[0024] Step 1. Input the tooth model, figure 1 is the initial tooth model of a patient, figure 2 for its maxillary teeth, image 3 To view the state of teeth from different angles;

[0025] Step 2. Complete the naming of each tooth in the upper and lower jaws. The first letter is U or L, which means the upper and lower teeth, the second letter is L or R, which means the left and right teeth, and the third letter means the teeth The number tooth on a certain side, select a certain tooth, and adjust the bracket on the surface of the tooth;

[0026] For example, tooth UL7 is the seventh tooth on the left side of the upper jaw, and the bracket on its surface is adjusted. Figure 4 It is the data selection dialog box for bracket adjustment. We can move...

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Abstract

The invention discloses a virtual bracket interaction method by means of a layered depth distribution map and point set matching. The method comprises the following steps of 1, sampling bottom pointsof the bracket, acquiring a bracket bottom sampling point set; searching a corresponding point of each bracket bottom sampling point on the tooth surface through a shortest distance, and acquiring a tooth surface point set; 2, calculating a spatial posture between the bracket bottom sampling point set and the tooth surface point set; 3, through point set matching, determining the position of the bracket on the tooth surface; and 4, performing Boolean calculation by means of LDNI, determining whether interference exists between the tooth and the bracket, if yes, an intersection set is found, thereby proving unsuccessful interaction. The virtual bracket interaction method realizes quick movement of the bracket on the tooth surface through a mouse, thereby accurately detecting whether interference occurs between the tooth and the bracket in real time, realizing high calculating speed and high stability, supplying visual reference data to a doctor, and facilitating determining of a tooth rectification plan and execution of clinical rectification.

Description

technical field [0001] The invention relates to the technical field of orthodontics, in particular to a virtual bracket interaction method using layered depth distribution maps and point sets to match. Background technique [0002] In recent years, digital oral technology has developed rapidly, and invisible orthodontics have gradually become popular. The job to be done by the digital treatment assistant system is to establish a tooth model and provide data support for the design of the treatment plan. To establish an accurate tooth model, it is first necessary to scan the plaster model by optical methods to obtain three-dimensional scanning data of the teeth and jaws, and then use digital geometric processing technology to separate the data of the teeth and gums, and repair the missing parts of the teeth to establish a movable tooth model. On this basis, the doctor designs the correction path of the teeth. [0003] Designing an orthodontic path for teeth often involves va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G16H50/50
Inventor 范然瞿文沁潘志庚
Owner HANGZHOU NORMAL UNIVERSITY
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