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Porcelain fused base crown grid model transition algorithm

A grid model and basal crown technology, applied in computing, 3D modeling, image data processing, etc., can solve problems affecting doctors' diagnosis and treatment of patients, etc.

Inactive Publication Date: 2007-11-28
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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AI Technical Summary

Problems solved by technology

Therefore, in software systems that require real-time display or operation, such as dental restoration CAD systems, if the data volume of the model is large, the delay caused by using this algorithm will seriously affect the diagnosis and treatment of doctors and patients.

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  • Porcelain fused base crown grid model transition algorithm
  • Porcelain fused base crown grid model transition algorithm
  • Porcelain fused base crown grid model transition algorithm

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Embodiment Construction

[0048] The core idea of ​​the present invention is to use spline curves in the process of generating mesh vertices. At the same time, in order to ensure the smooth transition between the transition surface and the base surface while the transition can be performed quickly, the present invention proposes a method based on boundary edges A transitional discrete point construction method for shapes and a projection stitching method.

[0049] The grid transition algorithm of the present invention will be described in detail below in conjunction with the accompanying drawings. As a specific implementation scheme, this algorithm mainly includes four steps: segment according to the model boundary, use Ferguson curve to obtain skeleton line interpolation points, construct transition surface interpolation points between skeleton lines, and boundary projection stitching. The following introduces them one by one.

[0050] Segment according to model boundaries

[0051] Figure 1 and Figu...

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Abstract

The invention discloses a transition algorism of ceramic-attaching fused base crown grid mould in the tooth repairing domain, which comprises the following steps: sectionalizing according to mould boundary; utilizing Feigershum curve to obtain the interpolating point of frame line; constructing the interpolating point among frame lines; sewing the projection of boundary. The invention improves the transition generating speed with certain adaptability, which can also generate high-quality tooth repairing data.

Description

Technical field [0001] The invention relates to the field of computer-aided design, in particular to computer-aided generation of a transitional mesh surface from a dental restoration mesh model. Background technique [0002] With the advancement of science and technology, the 3D models constructed and used in many fields are becoming more and more sophisticated and complex. This is especially true for the 3D model of oral restorations. The surface shape of the restorations is extremely complex due to the characteristic shapes such as cusps, ridges, and grooves on the restorations. The shape design based on continuous surface can't represent its surface shape very well, but the use of discrete modeling technology such as discrete mesh can not only represent its shape accurately but also facilitate the further construction and design of the model. However, with the continuous improvement of shape requirements and accuracy requirements, the data volume of the model is increas...

Claims

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Application Information

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IPC IPC(8): G06T17/40G06T19/00
Inventor 廖文和戴宁聂欣程筱胜
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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