Tooth preparation-based data flexible fusion method

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...

AI Technical Summary

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 accuracy is usually only 0.2-0.4mm, which leads to the fact that although the 3D reconstructed model can simultaneously obtain the internal and external structural data of the object, the surface accuracy is relatively low, and many details are lost.

[0005] Medicine requires digital models to have the internal and external structures of real teeth. The traditional single data source modeling has been difficult to meet the needs of design and manufacturing. However, the obtained geometric model can be optimized and combined to obtain the complete information of the physical model through the method of multi-source data fusion.

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