Degradable hollow spherical stent for large bone defect

Abstract

The invention discloses a degradable hollow spherical stent for large bone defect, and belongs to the technical field of medical instruments. The degradable hollow spherical stent comprises a spherical stent body, the spherical stent body comprises a spherical shell part and a hollow part, and the ratio of the thickness of the spherical shell part to the diameter of a ball is 0.06:0.25. In the space structure, all the particle spherical scaffolds are in point contact, so that a very abundant space is provided for tissue fluid to be in contact with the spherical scaffolds, and the in-vivo extracellular matrix environment is reserved to the maximum extent.

Description

Technical field [0001] The present invention relates to the field of medical devices, and in particular, to a degradable hollow spherical bracket for large bone defects. Background technique [0002] Every year, millions of people have caused bone defects due to traumatic, skeletal disease, tumor resection, osteoporosis, congenital bone deformity, aging, etc. A series of issues such as high rate, long disability time, and difficulty in treatment. The repair and functional reconstruction of large bone defects has always been the problem and research hotspots of orthopedics. [0003] In recent years, with the rapid development of bone tissue engineering technology, the implantation of bone tissue engineering scaffold is the current development trend. However, the current stent material is generally inadequate in the center of the stent, and the new bone is difficult, the material degradation is insufficient, the material fiber package after the immune response, especially the brack...

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Problems solved by technology

[0005] Chinese invention patent CN201711417114.6 discloses a bone defect filling scaffold structure, including: a multi-layer cylindrical base layer with a mesh structure, and the multi-layer cylindrical base layer is nested layer by layer, which solves the problem in the prior art. The scaffold for bone defect repair is prone to slippage after being implanted on the surface of the broken end of the bone defect, but it does not consider the problem of easy degradation

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