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Method for extracting three-dimensional tooth root morphology of intravital tooth based on periodontal membrane imaging anatomical characteristics

An anatomical feature and periodontal ligament technology, which is applied in the field of extracting three-dimensional root morphology of living teeth based on periodontal ligament imaging anatomical features, can solve the problems that have not yet been popularized and the clinical application effect has yet to be evaluated.

Active Publication Date: 2018-05-11
PEKING UNIV SCHOOL OF STOMATOLOGY
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Problems solved by technology

These algorithms are all based on professional software programming, and the clinical application effect has yet to be evaluated, and has not yet been popularized.

Method used

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Embodiment Construction

[0020] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0021] A method for extracting three-dimensional root morphology of living teeth based on periodontal ligament imaging anatomical features of the present invention comprises the following steps:

[0022] 1) The patient received a NewTomVGi cone-beam CT scan before orthodontic treatment, and a wide-field shot was taken according to the conventional head position requirements of orthodontic treatment. The tube voltage was 110V, the tube current was 2mA, and the exposure time was 10s. It was saved as Body layer data in DICOM format;

[0023] 2) Import the patient's DICOM format tomographic data into Mimics19.0 software, apply the "Segmentation" threshold function, set the hard tissue threshold range according to the grayscale performance of the soft and hard tissue in the patient's corresponding reduced tooth area, and make the "Mask" mas...

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Abstract

The invention relates to a method for extracting the three-dimensional tooth root morphology of an intravital tooth based on periodontal membrane imaging anatomical characteristics. The method comprises the steps of performing imaging scanning on a patient, and storing the scanned data to be a DICOM-format body layer data; importing the DICOM-format body layer data of the patient into Mimics19.0 software, and extracting a discontinuously distributed periodontal membrane mask from the image data; enabling the discontinuous distribution to be expanded into continuous distribution; taking a seedmask as a seed region to expand outwards to the root bone boundary, wherein the maximum expansion step does not exceed an artificially set maximum step parameter; and rebuilding a three-dimensional model of the corresponding tooth, and storing and outputting the three-dimensional model in an STL format to complete segmentation and extraction for the intravital tooth. The method is simple and easyto use, and can quickly realize tissue segmentation for the intravital tooth root.

Description

technical field [0001] The invention relates to a three-dimensional digital model of a tooth root, in particular to a method for extracting a three-dimensional tooth root shape of a living tooth based on anatomical features of periodontal ligament imaging. Background technique [0002] With the development of digital technology in stomatology, cone beam CT (Cone Beam Computed Tomography, CBCT) technology is more and more widely used in the diagnosis and analysis of oral diseases, especially in combination with image segmentation and three-dimensional reconstruction technology of digital software , making it possible to measure the morphology of living teeth in three dimensions. The individualized three-dimensional anatomical shape of a patient's tooth root is an important information concerned by dentists, especially orthodontists. The three-dimensional virtual tooth arrangement technology with tooth root information can assist orthodontists to achieve more accurate and prec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/12
CPCG06T2207/10081G06T2207/30036
Inventor 赵一姣王勇刘怡王斯维
Owner PEKING UNIV SCHOOL OF STOMATOLOGY
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