Tooth preparation-based data flexible fusion method

A preparation and data technology, applied in image data processing, 3D image processing, 3D modeling, etc., can solve the problems of inability to obtain internal data information of the model, loss of detailed features, low surface accuracy, etc., and achieve a simple and efficient fusion algorithm , The fusion process is smooth and stable, without the effect of interlacing

Active Publication Date: 2014-06-18
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

Structured light scanning measurement uses grating projection on the measured object and the reference plane to measure the three-dimensional shape, the accuracy is generally 0.02 ~ 0.05mm, but the internal data information of the model cannot be obtained
The CT scan is a cross-sectional scan, and the cross-section is often used. The appropriate layer thickness and layer spacing can be selected for scanning within the range of 1-10 mm. It has the advantages of no extra-layer tissue interference and clear structure. However, due to the system principle and the human body The radiation dose limit can be accepted, and the CT a

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  • Tooth preparation-based data flexible fusion method
  • Tooth preparation-based data flexible fusion method

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[0025] Specific implementation plan

[0026] Step 1. Data acquisition and pre-processing: Obtain the two-dimensional slice data of the patient's jaw by CT scanning, then take the mold to fill the upper and lower jaw plaster model, and use the structural optical scanner to collect the data of the plaster model to obtain the 3D point cloud data. Through the three-dimensional data reconstruction of the collected two types of data, an accurate triangular mesh model of the upper and lower jaw is constructed. Due to the inevitably encountering defects such as noise and scanning blind areas during scanning, it is necessary to preprocess the reconstruction model (de-noise, triangulation, hole repair, etc.). CT 3D reconstruction and structured light point cloud data 3D reconstruction are as follows: figure 1 , figure 2 Shown.

[0027] Step 2. Extraction of the fusion area: The entire dental model scanned by structured light is not all effective for the design process. First, the model need...

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Abstract

The invention discloses a tooth preparation-based data flexible fusion method, and belongs to the field of CAD (computer aided design). The method comprises four steps: data collection and pretreatment; characteristic curve self-adaptive extractive technique; data pre-registration; data dynamic registration. According to the method, only simple man-machine interactive operation is included; the degree of automation is high; a fused model not only has high-precision surface information, but also has a perfect internal structure; due to complete information which truly reflects a physical model, efficiency and accuracy of subsequent design and manufacturing can be improved; the method has important application value in the field of CAD for the oral cavity.

Description

Technical field [0001] The invention belongs to the field of computer-aided design and relates to the fields of reverse engineering and biomedical engineering. Background technique [0002] With the rapid development of science and technology in various fields, the scope of information collection applications continues to expand, and the amount of data to be processed is also increasing, from emerging fields such as supercomputers, earth satellites, various scanners, various camera systems, and nuclear magnetic resonance. The amount of data needs to be processed quickly in real time. The diversity of data sources has led to the complexity of data operations. In practical applications, a single data has been difficult to meet the needs in many cases. [0003] In the medical field, with the continuous development of computer applications in modern medicine, digital technology has been used to collect information and three-dimensional reconstruction of patients with dental defects, i...

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Application Information

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IPC IPC(8): G06T17/00G06T15/10A61B6/03
Inventor 戴宁崔海华许治李大伟程筱胜
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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