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Digitalized preparation method of titanium mesh cranial prosthesis

A technology for prosthetics and skulls, which is applied in the fields of electrical digital data processing, bone implants, and special data processing applications. The effect of high precision and easy processing energy

Active Publication Date: 2012-11-14
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese Patent Publication No. CN 1523530A, published on August 25, 2004, the name of the invention is a preparation method of titanium alloy cranial prosthesis. The application discloses the use of digitally designed prosthetic three-dimensional model and then the use of multi-point forming system to make Skull prosthesis, although this method solves the problems of the edge of the prosthesis and the edge of the defect in other methods in the past, high cost, and long production time, it has a certain degree of advancement
This method has a very large and complicated workload due to the large amount of CT atlases, and there is no intuitive 3D model for the designer to refer to. Using a multi-point forming system to press the restoration has a large amount of rebound and low precision, and there is no reference after pressing. Obvious shortcomings such as comparison and cropping of restorations, low boundary accuracy, etc.

Method used

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  • Digitalized preparation method of titanium mesh cranial prosthesis
  • Digitalized preparation method of titanium mesh cranial prosthesis
  • Digitalized preparation method of titanium mesh cranial prosthesis

Examples

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Embodiment

[0066] The CT scan in this example uses GEHGH SPEED 16-row CT machine to collect CT data of the head part of the human body. The head scan adopts 5mm layer thickness (1-1.5mm should be used for specific applications, 1mm for complex curved surface area, and 1.5mm for gentle curved surface area), 150KV, 160m As, and finally scanned about 32 layers of data; after scanning The data is transmitted from the CT host to the imaging workstation through the DICOM interface, and then it is carved into a CD in DICOM format for the next step. Use MIMICS to input multiple images in standard DICOM format at one time, and then recognize and convert them into internal common formats for processing, and then preprocess the images to remove noise. Set a threshold value T=800, divide the bone and soft tissue into bright and dark categories, realize the binary segmentation of the image, and extract the bone part. Select the required bone area at a certain level as the seed area, then click the a...

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Abstract

The invention relates to a digitalized preparation method of a titanium mesh cranial prosthesis, which belongs to the field of neurosurgical cranial repair and is used for solving the problems of complicated design, large prosthesis forming springback amount, poor processing precision, and the like of the prosthesis model in the prior art. The digitalized preparation method comprises the following steps of: carrying out model design of the cranial prosthesis on the basis of a cranial CT (Computed Tomography) image; making a reference prosthesis by a rapid prototyping system; carrying out numerical simulation analysis of forming and springback process on the prosthesis; repeatedly modifying a processing track and a supporting model till the springback amount meets the requirement; then guiding into a plate moving coil electromagnetic incremental forming system and carrying out prosthesis forming; and finally comparing with the reference prosthesis and cutting to obtain a final prosthesis. The digitalized preparation method is characterized in that: a direct line-to-surface method is applied to carrying out the model design of the prosthesis, numerical simulation on the prosthesis forming and processing by adopting the plate moving coil electromagnetic incremental forming system, The invention has the advantages of short prosthesis making period, small springback amount, high precision and good adhesion with the cranium of a patient and realizes high-quality cranial repair.

Description

technical field [0001] The invention discloses a digital preparation method of a titanium mesh skull prosthesis, which is mainly used in the medical field, and is especially suitable for cranial bone repair in neurosurgery and medical plastic surgery. Background technique [0002] In the field of skull repair in neurosurgery, titanium alloy has become an ideal material for skull repair due to its good tissue compatibility, light weight and high strength. The preparation of titanium alloy cranial prostheses initially relied on manual shaping, and it is still a commonly used shaping method in China. Based on the appearance and shape of the patient's defect and their own experience, the doctor manually prefabricated the approximate shape of the prosthesis, compared it with the patient's exposed skull during the operation, and then manually modified the shape repeatedly, and finally completed the operation with disinfection. This method takes a long time to operate, and it is d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50A61F2/28
Inventor 韩飞邓颖哲莫健华王培
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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