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Designing and making method of customized 3D printing porous titanium alloy segmental prosthesis for reconstruction of large segmental bone defect

A 3D printing and titanium alloy technology, applied in 3D printing, metal processing equipment, prostheses, etc., can solve the problems that it is difficult to accurately control the external shape and internal structure of metal prostheses, and achieve low stress shielding effect, enhanced stability, Avoid the effect of bone resorption

Inactive Publication Date: 2017-07-07
FOURTH MILITARY MEDICAL UNIVERSITY
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Problems solved by technology

However, traditional porous metal preparation processes such as powder metallurgy, self-propagating sintering, and titanium fiber sintering are difficult to precisely control the external shape and internal structure of metal prostheses.

Method used

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  • Designing and making method of customized 3D printing porous titanium alloy segmental prosthesis for reconstruction of large segmental bone defect
  • Designing and making method of customized 3D printing porous titanium alloy segmental prosthesis for reconstruction of large segmental bone defect
  • Designing and making method of customized 3D printing porous titanium alloy segmental prosthesis for reconstruction of large segmental bone defect

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] 1) if figure 1 Collect the thin-slice CT scan and MRI imaging data of the patient's part to be reconstructed as shown, and the doctor determines the safe osteotomy range according to the nature of the lesion, designs the surgical path and determines the osteotomy plane;

[0025] 2) Preparation of individualized titanium alloy segmental prosthesis:

[0026] Computer-aided design software is used to design the external shape and structure of the personalized prosthesis according to the patient's thin-slice CT scan data, MRI image data, surgical path and osteotomy plane shape of the lesion. Its basic form is as figure 2 , 3 shown. In order to facilitate bone grafting, its main structure is a hollow tubular shape. The tube wall is mainly porous structure, according to the reconstruction site, method and bone grafting requirements, the corresponding t...

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Abstract

The invention discloses a designing and making method of a customized 3D printing porous titanium alloy segmental prosthesis for reconstruction of large segmental bone defect. Through preoperative thin-slice CT, a lesion bone area is scanned, obtained data is imported into a computer, and a three-dimensional digital model is reconstructed through computer aided design. Then, in combination with such imageological examination as MRI (magnetic resonance imaging) and the like, an osteotomy range of the lesion part is determined. The individual porous titanium alloy segmental prosthesis is designed in accordance with the specific osteotomy range and a reconstruction method. Prosthesis data is imported into metal 3D printing equipment so as to print the prosthesis. During an operation, lesion bone can be excised by virtue of such precision operation assisted technologies as navigation, a guide plate and the like. Then, a proper autogenous fibula (or biological ceramic artificial bone and allogeneic bone) is selected for conducting composite bone grafting. Finally, a complex is implanted into a bone defect area and is stably fixed. The method can complete precision making by virtue of a 3D printing technology and can achieve precision excision by virtue of the navigation and guide plate technologies, so that precision reconstruction of the large segmental bone defect is finally achieved.

Description

technical field [0001] The present invention relates to a method for repairing and reconstructing large segmental bone defects caused by trauma, infection, congenital malformation or tumor resection, in particular to a personalized customized 3D printed porous titanium alloy segmental for reconstruction of large segmental bone defects Design and fabrication of prostheses. Background technique [0002] The repair and reconstruction of large bone defects caused by trauma, infection, congenital malformation or tumor resection is a common and serious clinical problem. Due to the insufficient mechanical strength of bioceramic artificial bone and the limitation of autogenous bone materials, large allogeneic bone is still the preferred method to solve the problem of large segmental bone defect reconstruction in clinical practice. However, with the widespread development of surgical treatment of large bone defects and the lack of sources of large bone allografts, more and more pati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/28A61B34/10B33Y80/00
CPCA61F2/28A61F2002/2835A61F2002/30772A61F2002/3093A61F2002/30985A61F2310/00023B33Y80/00
Inventor 郭征付军范宏斌黄海
Owner FOURTH MILITARY MEDICAL UNIVERSITY
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