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Tooth preparation body digital model design method

A model design and preparation technology, applied in the fields of reverse engineering and biomedical engineering, can solve the problem that there is no computer-aided technology in the design process of the preparation model, restricting the treatment quality, efficiency and standards of dental hard tissue diseases, etc. , to achieve the effect of facilitating interactive operation and modification, reducing time and treatment costs, and improving comfort and efficiency

Inactive Publication Date: 2014-06-25
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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AI Technical Summary

Problems solved by technology

This preparatory mode has low efficiency, poor effect and difficult quality control
A large number of repetitive and laborious micro-operations are performed in such a small special operating space as the oral cavity. It is difficult to avoid human visual deviation and manual positioning control errors, which have become key technical bottlenecks restricting the quality, efficiency and standard realization of dental hard tissue diseases.
In dental preparation training, there are related digital products that use KAVO’s PREPassistant evaluation system to conduct preparatory training for intern students, but it can only evaluate the prepared preparation and does not involve the design stage of the model
According to relevant literature, there is no relevant report on the application of computer-aided technology to the design process of the preparation model

Method used

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  • Tooth preparation body digital model design method

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Embodiment Construction

[0033] specific implementation plan

[0034] Step 1. Data generation and preprocessing: Before the design of the preparation model, it is first necessary to generate the initial data models required for the two designs, which are: (1) CT data of the patient's teeth, which is the CT data of the patient in the hospital through a CT machine. From the shooting, the CT machine directly generates DICOM format files, and the three-dimensional mesh data model of the teeth can be reconstructed by using medical reconstruction software such as Mimics; (2) The plaster data model scanned by the optical scanner, which is made by the doctor on the patient's teeth. The impression is obtained by scanning the impression with an optical scanning device, and the point cloud data generated by the scanning is triangulated and packaged by reverse engineering software (such as Geomagic) to obtain the plaster model data of the teeth. The two initial models are as figure 1 shown. Import these two kin...

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Abstract

The invention provides a tooth preparation body digital model design method, and belongs to the field of computer aided design digital dental treatment. The method includes the steps of data model building and preprocessing, tooth feature extraction, preparation body model parametric design and modification and model quality evaluation. Man-machine interaction is easy and convenient to achieve by means of a guide type model generation method, the automation degree is high, a tooth preparation body model meeting the requirements of various medical indexes can be smoothly generated, and individuation, parametric modification and result quality evaluation of the tooth preparation body model can be achieved. By means of the design method, tooth preparation time and treatment cost of dentists are greatly reduced, repair comfort and efficiency are improved, and the method has great application value in the field of computer aided dental preparation.

Description

Technical field [0001] The invention relates to a digital model design method of a tooth preparation, which belongs to the field of computer-aided design, and also relates to the fields of reverse engineering and biomedical engineering. Background technique [0002] The process of quantitatively cutting and shaping the hard tissues of diseased teeth (including enamel, dentin and cementum in physiological and pathological states) by clinicians in the patient's oral cavity is called "tooth preparation". Its purpose is to remove the diseased tissue on the hard tissue of the tooth and prepare the remaining healthy part into a specific geometric shape. The remaining tooth of this special shape is the "preparation body". Accurate tooth preparation can not only create a suitable three-dimensional restoration space for various dental hard tissue fillings and restorations, meet the treatment requirements for mechanical strength, retention, support and aesthetics, but also reduce seco...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 戴宁崔海华宋英龙程筱胜
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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