A method for repairing the adjacent surface of the crown in a three-dimensional tooth model

A tooth model and adjacent surface technology, which is applied in image data processing, instruments, etc., can solve the problems of difficult orthodontic treatment, inability to accurately restore the contact relationship between tooth adjacent surfaces, and lack of crown adjacent surface repair methods.

Active Publication Date: 2019-04-30
INNOVATIVE MATERIAL & DEVICES
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Problems solved by technology

[0003] However, at present, there is no effective and accurate method for repairing the adjacent surfaces of the crowns, and it is impossible to accurately restore the contact relationship between the adjacent surfaces of the adjacent teeth that is partially lost due to the tooth cutting operation, so it is difficult to provide a basis for the next step of orthodontic treatment

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  • A method for repairing the adjacent surface of the crown in a three-dimensional tooth model

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing.

[0023] see figure 1 , the method for repairing the adjacent surface of the crown in the three-dimensional tooth model of the present invention comprises the following steps:

[0024] Step S1, extracting the tooth model boundary point set from the database.

[0025] Step S2, extracting the left and right adjacent surface boundary point sets of the tooth model from the boundary point set.

[0026] For the left boundary and the right boundary in turn, perform the following steps:

[0027] Step S3, interpolating points at a certain distance between the first and end points of the left boundary or the right boundary to obtain a set of closed-loop boundary points. Interpolation point generation method: Calculate the vector n1 / |n1| from the end point e to the first point s, according to the formula p=e+i*n1*delta (where delta is the interpolation distance, here it is set to 0.2...

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Abstract

The invention discloses a method of repairing the adjacent sides of a dental crown in a 3D tooth model, comprising the following steps: extracting a boundary point set of a tooth model from a database; extracting left and right adjacent side boundary point sets of the tooth model from the boundary point set; and for both the left boundary and the right boundary, performing the following steps: interpolating points between the begin and end points of the left or right boundary according to a certain distance to get a closed-loop boundary point set; calculating the center of mass of the closed-loop boundary to make the closed-loop boundary point set gather to the center of mass so as to interpolate a point set V; generating a triangular face set based on the closed-loop boundary point set and the point set V; and calculating the center of mass of the tooth model, and adjusting the position of the point set V according to the center of mass to make the position consistent with the curvature trend of the tooth model. The contact relationship of the adjacent sides of adjacent teeth partially missing due to tooth segmentation can be restored accurately.

Description

technical field [0001] The invention relates to the field of computer application, in particular to a method for repairing the adjacent surface of a tooth crown. Background technique [0002] By scanning the patient's tooth model in 3D, a 3D tooth model file that can be displayed on the computer is obtained. The restoration of the proximal surface is the operation of reconstructing the missing part of the proximal surface of each three-dimensional tooth crown model obtained after segmentation through professional computer software. Through the restoration of the adjacent surface of the crown, it is hoped that the contact relationship between the adjacent surfaces of the adjacent teeth that is partially lost due to the tooth cutting operation can be accurately restored, and an accurate three-dimensional model of the patient's teeth can be provided for the next step of designing the orthodontic plan. [0003] However, at present, there is no effective and accurate method for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T19/20
CPCG06T19/20G06T2219/008
Inventor 魏伟
Owner INNOVATIVE MATERIAL & DEVICES
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