Hydrogel bioprinting path planning method based on model boundary information

A 3D printing and printing path technology, applied in the field of 3D printing, can solve the problems of uneven distribution of overall stress, poor self-support, inapplicability, etc., and achieve the effect of improving the overall continuity, improving the accuracy of the model, and reducing the number

Active Publication Date: 2022-05-10
DALIAN UNIV OF TECH
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Problems solved by technology

There are the following problems: the self-supporting property of the hydrogel material is poor, the overall stress distribution is uneven, it is difficult to carry the filling method of too many path filling methods, and the influence of the model scanning angle on the printing result cannot be considered, and it is not suitable for hydrogel Glue bio 3D printing field

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  • Hydrogel bioprinting path planning method based on model boundary information
  • Hydrogel bioprinting path planning method based on model boundary information
  • Hydrogel bioprinting path planning method based on model boundary information

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Embodiment Construction

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and technical solutions.

[0034] In this embodiment, the auricle STL model is selected as a calculation example, and the software matlabR2016a is used for realization. The specific steps of the method are as follows:

[0035] Step 1: Use matlab software to read the STL model of the auricle and slice it. Such as figure 2 Slice images of the pinna STL model are shown in the figure. Computes the number of scanline intersections with the contour. In order to improve the self-supporting and strength of the printed structure, the orthogonal parallel filling is selected as the generation method of the printing path, so that the parallel filling lines between adjacent layers are perpendicular to each other. image 3 It is a line chart of the relationship between the number of intersection points of the scanning lines and the scanning angle of the auricle model. A...

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Abstract

The invention relates to a hydrogel biological 3D printing path planning method based on model boundary information, which belongs to the field of 3D printing, and relates to a method for planning a 3D printing path of a model by using slice boundary information of a biological organ model. In this method, the biological model is first sliced, and the number of intersections between the scanning lines and the model contour at different angles is obtained by using the exhaustive method, and the angle with the least number of intersections is selected as the model scanning angle. It makes full use of the boundary contour information of biological model slices, controls the number of corners, reduces the truncation point of the path, and controls the overall continuity of the printing path. Determine the reasonable value range of the corner, and plan the printing path suitable for hydrogel bio-3D printing. The invention makes full use of the boundary information of the slices of the biological organ model, and reduces the number of intersection points between scanning lines and contours and the number of truncation points of paths. Improve the overall continuity of the path and improve the model accuracy.

Description

technical field [0001] The invention belongs to the field of 3D printing, and relates to a method for planning a 3D printing path of a model by using slice boundary information of a biological organ model. Background technique [0002] In clinical medicine, the failure or defect of some patients' organs can only be cured by organ transplantation, and the current shortage of organs is a big problem for clinicians and patients. Biological tissue engineering is a discipline born to solve this problem. Japanese scholar Nakumura first proposed the concept of 3D bioprinting, the core concept of which is to directly print biomaterials loaded with cells to form scaffolds, and the loaded materials are usually hydrogels. At present, there are few studies on hydrogel bioprinting, and there is a lack of systematic path planning methods. The traditional 3D printing path planning method, such as "A Contour-based 3D Printing Path Planning Method for Functionally Gradient Materials" inven...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B29C64/106B29C64/386B29C64/393B33Y10/00B33Y50/00B33Y50/02
CPCB29C64/106B29C64/386B29C64/393B33Y10/00B33Y50/00B33Y50/02
Inventor赵丹阳杨云博李红霞张诚
OwnerDALIAN UNIV OF TECH