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Digital preparation method of individualized impression trays for edentulous jaws

A technology of impression tray and edentulous jaw, which is applied in dentistry, compression molding cup, dental prosthesis, etc., to improve the efficiency and quality of diagnosis and treatment, and improve the technical level of clinical treatment operation

Active Publication Date: 2016-12-07
PEKING UNIV SCHOOL OF STOMATOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the use of 3D printing technology to realize the digital production of individual trays of complete dentures has the characteristics of fast, accurate, efficient, convenient and timely, but there are no related reports at home and abroad.

Method used

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  • Digital preparation method of individualized impression trays for edentulous jaws
  • Digital preparation method of individualized impression trays for edentulous jaws
  • Digital preparation method of individualized impression trays for edentulous jaws

Examples

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Embodiment Construction

[0028] The following examples are used to illustrate the present invention, but not to limit the scope of the present invention.

[0029] See figure 1 , The digital preparation method of a personalized impression tray for edentulous jaws of the present invention includes the following steps:

[0030] 1. A digital preparation method of personalized impression tray for edentulous jaws, including the following steps:

[0031] 1) Use impression paste or alginate to make a preliminary impression, which can be filled with plaster model;

[0032] 2) Directly scan the first impression or scan the plaster model with the dental jaw model 3D scanner to obtain the three-dimensional data of the tissue surface morphology of the edentulous jaw or plaster model;

[0033] 3) Transfer the scanned data into the reverse engineering software, extract the mucosal return line of the initial impression of the edentulous jaw as the edge line, and use the edge line as the boundary to intercept the point cloud da...

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Abstract

The invention relates to a digital preparation method of an edentulous jaw individual impression tray. The method comprises the following steps: preparing a preliminary impression, or forming a plaster model by pouring; scanning the preliminary impression or scanning the plaster model; introducing scanning data into reverse engineering software and intercepting tissue surface point cloud data of the edentulous jaw preliminary impression; acquiring point cloud data of undercut-free alveolar ridge surface; uniformly enlarging the alveolar ridge surface by 1-2mm in the normal direction of the alveolar ridge surface so as to obtain a virtual tray inner surface; uniformly thickening the virtual tray inner surface by 2mm in the normal direction thereof; designing an upper jaw virtual tray handle and a lower jaw virtual tray handle; and fusing data boundaries of the inner and outer surfaces of the virtual tray as well as the handle and saving the data in an STL format, importing the data into a computer system connected to 3D printing equipment, and making the edentulous jaw individual impression tray from a polymethyl methacrylate (PMMA) material by virtue of the 3D printing equipment. The digital designing and manufacturing method of the edentulous jaw individual impression tray can replace traditional hand-made manufacturing method.

Description

Technical field [0001] The invention relates to the production of an edentulous jaw impression tray, in particular to a digital preparation method for an edentulous jaw personalized impression tray. Background technique [0002] 1. Manufacturing technology of individual trays of manual complete dentures currently used clinically at home and abroad [0003] There are 4 key steps in making a complete denture: impression, model, collar relationship (including occlusal balance), tooth arrangement and base shape. Among them, the impression and model are the basis. With accurate impressions and models, the complete denture can be well retained. However, it is feasible to take an impression with a public tray for removable partial dentures. For complete dentures, the public tray and the patient’s edentulous oral tissue are only roughly similar, and the distance between the two parts is uneven. , The gap between the edge part and the mucosal refolding line is not equal, and the accurate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61C9/00
Inventor 孙玉春吕培军王勇周永胜陈李彤
Owner PEKING UNIV SCHOOL OF STOMATOLOGY
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