A Method for Removing Undercuts of Denture Model Based on Grid Projection

A grid projection and grid model technology, applied in medical science, dental prosthesis, dentistry, etc., can solve the problems of high labor cost, limited manual operation precision, technical level of technicians, long time for model transfer and preparation, etc., to achieve The effect of topology optimization

Active Publication Date: 2022-04-22
SHENZHEN LOTUT INNOVATION DESIGN CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Solve the problems that the accuracy of manual operation is limited by the technical level of the technician, and the labor cost is high, and the model transfer and preparation time are long.

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  • A Method for Removing Undercuts of Denture Model Based on Grid Projection
  • A Method for Removing Undercuts of Denture Model Based on Grid Projection
  • A Method for Removing Undercuts of Denture Model Based on Grid Projection

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Embodiment Construction

[0038]Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0039] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should ...

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Abstract

The invention relates to a method for removing undercuts of a denture model based on grid projection, and belongs to the fields of computer-aided design and graphics. It includes the following steps: S1: Input the tooth mesh model, convert it to OFF format, and set the projection direction; S2: Add the projection mesh surface on the top of the bounding box perpendicular to the projection direction, and add the base surface at the bottom; S3: Correct The projection surface in the bounding box space, the input grid and the base surface are divided into BVH space; S4: the projection grid surface is projected according to the given projection direction to intersect the input grid or the base surface, and the projection point is placed at the intersection point superior. S5: Calculate the curvature field of the new grid composed of the projected grid; S6: Adaptively re-divide the new grid based on the local grid operation and the Gaussian curvature field, and output the grid after the iteration stops. The invention can use the computer-aided design technology to replace the manual filling of the undercut part in the tooth body preparation process, thereby reducing errors and costs caused by manual operations.

Description

technical field [0001] The invention belongs to the field of computer-aided design and graphics, and relates to a method for removing an undercut of a denture model based on grid projection. Background technique [0002] With the development of digitization, 3D scanning and other related computer-aided technologies, as well as the continuous iterative update of various data collection equipment and means, the innovation and application of digital technology in the dental field has continuously broken through the limitations of traditional medical technology. In the past dental technology, in many cases, complex data needs to be processed, and at the same time, there are high requirements for precision, which can only be simulated by computer, but it is very difficult to use only two-dimensional slices for complex three-dimensional space data. It is difficult to express intuitively, so it is very valuable to use 3D models to visualize and process some medical data. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61C13/00
CPCA61C13/0004
Inventor 秦红星陈杰
Owner SHENZHEN LOTUT INNOVATION DESIGN CO LTD
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