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Method for determining container of single tooth

A tooth and single technology, applied in the determination of a single tooth containing body, can solve the problems of long cycle and patient inconvenience

Inactive Publication Date: 2013-05-08
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This treatment usually takes a long time and is inconvenient for the patient

Method used

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  • Method for determining container of single tooth
  • Method for determining container of single tooth
  • Method for determining container of single tooth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Embodiment 1, the classification of tooth body in stomatology

[0081] In prosthodontics, teeth are divided into four categories according to their functions and characteristics: incisors, canines, premolars, and molars. image 3 shown.

[0082] The incisors are further divided into central incisors and lateral incisors, located in the front of the mouth, up, down, left, and right, a total of 8 teeth, the crown of the proximal view is wedge-shaped, the neck is thick and the incisal margin is thin, and its main function is to cut food.

[0083] Canines, commonly known as canines, are located at the corners of the mouth. There are 4 upper, lower, left, and right teeth. The crown is still wedge-shaped, and there is a protruding cusp on the incisal edge.

[0084] Premolars, also known as bicuspids, are located behind the canines and in front of the molars, up, down, left, and right. There are 8 teeth in total. The molars have tricuspids, the main function of which is to ...

Embodiment 2

[0087] Embodiment 2, the collection of the surface characteristic point of single tooth and the extraction of tooth surface characteristic point The characteristic point of collection tooth surface, its process is as follows:

[0088] (1) On the basis of segmenting the tooth digital model, select different tooth models in turn, and calculate the Gaussian curvature values ​​of all points on the tooth surface in turn. Establish a data structure GaoSi used to store the Gaussian curvature value information of tooth surface feature points, use m to mark the Gaussian curvature value of the point, and use ptIndex to store the index information of the point.

[0089] (2) Repeat step (1), calculate the Gaussian curvature values ​​of all tooth surface vertices, and sort all Gaussian curvature values;

[0090] (3) Using an interactive method to display the vertex coordinates of the tooth and the Gaussian curvature value of the point, and draw the point on the digital model of the tooth f...

Embodiment 3

[0110] Embodiment 3. Establishing a local three-dimensional Cartesian coordinate system of a single tooth according to the feature points on the tooth surface

[0111] Taking molars as an example, mesial buccal point A, distal buccal point B, mesial lingual point or distal lingual point C. The straight line where point AB is located is parallel to the near-distal direction of the tooth, so define the direction of the straight line where AB is located as the Z-axis direction of the coordinate system; Mandibular direction; finally define the direction of the line where the cross product of the Y-axis and the Z-axis is located as the X-axis direction of the coordinate system, that is, the buccal-lingual direction of the molars (see Figure II The definition and description of the buccal direction of the crown), at this time, after determining the directions of the three coordinate axes of each tooth, the midpoint of the three axes with fixed lengths is translated to the geometric...

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Abstract

The invention discloses a method for determining a container model of a single tooth, in particular to a method for determining a container model based on tooth surface characteristics and a local three-dimensional right angle coordinate system, which mainly comprises the following steps: based on a segmentation tooth digital model, reflecting the curve degree at the peak by utilizing complex collection of a triangular facet and a discrete Gaussian curvature, collecting surface feature points of a single tooth; based on the surface feature points of the single tooth, establishing corresponding local three-dimensional right angle coordinates for incisor teeth, cuspid teeth, premolar teeth, and odontoprisis; and respectively establishing the container models of the incisor teeth, the premolar teeth, the odontoprisis and the cuspid teeth by using extreme values of the single tooth model under the three-dimensional right angle coordinate system. The invention has the advantages of novel and reasonable design, convenient implementation, high operating speed, high data processing accuracy and good implementation effect, can extract characteristic points of teeth and facilitate the operation on teeth, and can be used in the tooth correcting system.

Description

technical field [0001] The invention discloses a method for determining an inclusion body model based on tooth surface feature points, and mainly relates to a tooth correction software system. Background technique [0002] Orthodontics, as a branch of the field of stomatology, mainly studies the growth and development of the three-dimensional structure of the jaw, face, and cranium, as well as the deformities caused by various reasons. Today, the correction of dental and jaw deformities is facing a digital revolution. Especially with the more and more extensive application of 3D digital imaging and measurement technology in orthodontic diagnosis, design, treatment and efficacy prediction, orthodontics is developing more and more in the direction of computerization, and has a good development prospect. [0003] In traditional dental treatment, the treatment equipment needs to be adjusted repeatedly to achieve correct tooth movement trajectory. This treatment method usually ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00A61C19/04
Inventor 李占利孙瑜陈有兰李康军
Owner XIAN UNIV OF SCI & TECH
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