Layered quick design and manufacturing method for individualized artificial bone injection and solidification molding die

A technology of injection molding and manufacturing methods, which can be used in prostheses, bone implants, medical science, etc., can solve problems such as short manufacturing cycles, achieve the effects of shortening manufacturing time, overcoming surface step defects, and reducing manufacturing costs

Inactive Publication Date: 2012-08-01
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems of high product quality, short manufacturing cycle and individualized matching that the existing artificial bone manufacturing technology is difficult to meet clinical needs, and

Method used

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  • Layered quick design and manufacturing method for individualized artificial bone injection and solidification molding die
  • Layered quick design and manufacturing method for individualized artificial bone injection and solidification molding die
  • Layered quick design and manufacturing method for individualized artificial bone injection and solidification molding die

Examples

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Embodiment

[0050] Embodiment: A layered rapid design and manufacturing method of an individualized artificial femur injection molding mold, including the following steps (see the overall processing flow in figure 1 ):

[0051] (1) Segmentation of femoral CT images and establishment of 3D models, including the following sub-steps (for the segmentation process of femoral CT images, see figure 2 ):

[0052] ⅰ) Collect CT scan images of the patient's lower limbs, with a layer spacing of 1.5mm (the smaller the image layer spacing, the more accurate the modeling result, but the maximum should not exceed 3mm), export in DICOM format, use Mimics (or 3DMed and other image processing software) to open CT data in DICOM format.

[0053] ii) Perform threshold segmentation on the entire image data set, set the CT value range from 150 to 1200 (the CT value range of other target bones should be adjusted appropriately), and then use the region growing method to extract the femur. At this time, the im...

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Abstract

The invention discloses a layered quick design and manufacturing method for an individualized artificial bone injection and solidification molding die. The method comprises the following specific steps of: 1, segmenting medical image data of a target bone by using image processing and three-dimensional modeling software, and modeling a three-dimensional model on the surface of the target bone; 2, opening the three-dimensional model on the surface of the target bone by using reverse engineering software, and modeling a target bone smooth curve surface sheet and computer-aided design (CAD) model; 3, opening the CAD model by using industrial design three-dimensional software to design the die and layer the designed die; and 4, according to the die designed in the step 3 and layering, processing layered plates of the die, assembling the die, and finally performing injection and solidification molding and de-molding. The invention provides a set of semi-automatic die design scheme under the assistance of a computer, wherein the medical image processing technology, the reverse engineering technology and the CAD/computer-aided manufacturing (CAM) technology are combined.

Description

technical field [0001] The invention belongs to the field of individualized and digitalized design and manufacture of medical implants, in particular to a layered rapid design and manufacture method of an individualized artificial bone injection mold. Background technique [0002] Individualized artificial bone is an artificial bone customized for a patient's specific anatomical structure. Compared with mass-produced orthopedic implants, it can achieve better therapeutic effects because it is more compatible with the diseased tissue. However, the existing artificial bone manufacturing technology is difficult to meet the timeliness of individual customization, which restricts the clinical application of individual customized artificial bone. [0003] Most of the artificial bone molding manufacturing methods reported in the existing literature use rapid prototyping (RP) technology, including RP direct manufacturing and mold indirect manufacturing methods. CN1561927A generates...

Claims

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Application Information

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IPC IPC(8): A61F2/28
CPCA61F2/28A61F2002/30001
Inventor 刘泗岩嵇萍刘浩黄念一周长圣卢光明
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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