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Fiber-reinforced 3D printed polymer pelvis substitute

A 3D printing, fiber-reinforced technology, used in joint implants, joint implants, medical science, etc., can solve the problems of limited application, low static strength and fatigue strength of polymer materials, and improve early stability. , the effect of enhancing mechanical properties and meeting the requirements of mechanical environment

Active Publication Date: 2020-06-12
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with titanium alloy, the elastic modulus of PEEK material is similar to that of cortical bone, and it has good radiation permeability, which can largely avoid the stress shielding effect and CT artifact problems; The strength and fatigue strength are much lower than metal materials, which limits its application in clinical medicine

Method used

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  • Fiber-reinforced 3D printed polymer pelvis substitute
  • Fiber-reinforced 3D printed polymer pelvis substitute
  • Fiber-reinforced 3D printed polymer pelvis substitute

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1, take I type prosthesis (iliac resection) as example, as figure 1 , figure 2 , image 3 and Figure 4 As shown, a fiber-reinforced 3D printed polymer pelvic substitute, the pelvic bone substitute is a non-acetabular pelvic bone substitute, and the non-acetabular pelvic bone substitute includes reinforced load-bearing part 1, boundary part 2 and non-weight-bearing Part 3: There are reinforcing fibers 5 inside the reinforced load-bearing part 1 to enhance the tensile and bending strength of the substitute; the boundary part 2 is connected with the remaining bone; the non-load-bearing part 3 is the pelvic bone substitute without the reinforced load-bearing part 1 and The remaining part behind the boundary part 2 plays a role in maintaining the original anatomical shape of the pelvis, and the shape of the non-weight-bearing part 3 can be determined according to the same type of clinical needs.

[0027] The reinforced load-bearing part 1 is designed accordin...

Embodiment 2

[0032] Embodiment 2, take II+III (acetabulum+ischium resection) type prosthesis as example, as Figure 5 , Figure 6 and Figure 7 As shown, a fiber-reinforced 3D printing polymer pelvic substitute, the pelvic substitute is an acetabular pelvic substitute, and the difference from the Type I prosthesis in Example 1 is that the acetabular pelvic substitute The fixing method between the boundary part 2 and the remaining bone is screw fixation; in addition, the acetabular pelvic bone substitute includes an acetabular cup part 4, and the inside of the acetabular cup part 4 contains reinforcing fibers 5; the laying direction of the reinforcing fibers 5 is radial. Except for the connection mode and the acetabular cup part 4, other parts are similar to those described in Embodiment 1, and will not be repeated here.

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Abstract

A fiber-reinforced 3D printed polymer pelvis substituteis divided into an acetabulum-free pelvis substitute and an acetabulum-containing pelvis substitute, wherein the acetabulum-free pelvis substitute comprises a reinforced bearing part, a boundary part and a non-bearing part, and the acetabulum-containing pelvis substitute comprises a reinforced bearing part, a boundary part, a non-bearing partand an acetabular cup part; the boundary part is connected with the bone; the non-bearing part plays a role in maintaining the original anatomical morphology of the pelvis; reinforced fibers are arranged in the reinforced bearing part and play a role in enhancing tensile strength and bending strength of the substitute. The trend of the reinforced fibers is determined according to the force line direction of the defect substitute part in the pelvis integral force line, and the fineness and the volume of the reinforced fibers are determined according to the stress distribution of the pelvis in aservice state, so that the pelvis substitute has an enough safety coefficient under the physiological load of a human body; the reinforced bearing part meets the mechanical environment requirements of the pelvis part of the human body under various gait conditions by designing the shape and the trend, fineness and volume of the internal reinforced fibers.

Description

technical field [0001] The invention belongs to the technical field of pelvic bone prosthesis, and in particular relates to a fiber-reinforced 3D printing polymer pelvic bone substitute. Background technique [0002] In daily activities, the pelvis transmits the upper body load to the lower limbs and is an important part of the human bone structure. However, after the pelvis is injured due to injury, the damaged part needs to be resected and reconstructed. With the development of materials and manufacturing technology, pelvic prosthesis reconstruction has become the mainstream pelvic reconstruction method. Most of the currently used prosthesis materials are metal alloys represented by titanium alloys. Due to their high elastic modulus, they will produce stress shielding effects, which will cause complications such as bone loss and prosthesis loosening. [0003] Polymer materials with excellent biocompatibility represented by polyetheretherketone (PEEK) have been successfull...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/32A61F2/34A61F2/30A61L27/44A61L27/54
CPCA61F2/30771A61F2/32A61F2/34A61F2002/30433A61F2002/30784A61F2002/3093A61L27/44A61L27/54A61L2430/02
Inventor 王玲惠亿军孙畅宁董恩纯李涤尘
Owner XI AN JIAOTONG UNIV
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