Distal radius personalized artificial prosthesis

An artificial prosthesis, distal radius technology, applied in the direction of prosthesis, manufacturing tools, bone implants, etc., can solve the problems of wear prosthesis design, fracture around the prosthesis, prosthesis loosening, etc., to reduce stress shielding, Reduces bone wear and enhances overall strength

Pending Publication Date: 2020-03-20
FOURTH MILITARY MEDICAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the materials used for artificial prosthesis include titanium alloy prosthesis, cobalt-chromium-molybdenum alloy, ultra-high molecular polyethylene, etc., but due to the high elastic modulus of titanium alloy materials, bone resorption, wear and tear cau

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  • Distal radius personalized artificial prosthesis
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Embodiment Construction

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments described here are only used to illustrate and explain the present invention, but the embodiments of the present invention are not limited thereto.

[0020] Such as figure 1 As shown, the present invention includes an outer jacket 1, a core post and a remaining radius 5 having the same geometric shape as the amputated radius, and the core post is made of a titanium alloy material, which has good biocompatibility in the graft and has Strong mechanical strength and supporting effect. The core column is divided into the solid part 3 of the core column and the porous part 4 of the core column; the jacket is made of polyetheretherketone / ceramic composite material, and its elastic modulus is more compatible with the natural bone of the human body, which reduces the problem of stress shielding. It plays a cer...

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Abstract

The invention provides a distal radius personalized artificial prosthesis. The distal radius personalized artificial prosthesis comprises a core column composed of a core column solid part and a corecolumn porous part, wherein the core column solid part comprises a core column solid part far end, a core column solid part collar part and a core column solid part intramedullary nail; the hollow conical core column porous part is arranged at the outer side of the core column solid part intramedullary nail and wrapped by remaining radius; and an outer sleeve with a same geometrical shape as cut-off radius is arranged at the outer side of the core column solid part far end. By adoption of a combined structural design, the outer sleeve and the cut-off radius are the same in geometrical shape; good contact between the outer sleeve and bone joint surface is guaranteed; stress shielding and bone abrasion are relieved; and the probability of postoperative fracture is reduced.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a personalized artificial prosthesis at the distal end of the radius. Background technique [0002] The distal radius is a common tumor site, and the purpose of surgical treatment is to remove the tumor, effectively reduce local recurrence, and preserve wrist function to the greatest extent. Clinically, in order to preserve a certain function of the wrist joint, resection of the tumor segment, autologous bone or allogeneic half-joint replacement and other treatment methods are commonly used, but there are many complications and the long-term effect is not good. Several commonly used methods for surgical reconstruction of distal radius bone defects are introduced below: [0003] Autologous bone transplantation often adopts fibular head half-joint graft with or without blood vessels to repair the bone defect in the distal radius. The advantage is that the shape of the fibular head i...

Claims

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Application Information

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IPC IPC(8): A61F2/28
CPCA61F2/28A61F2002/2835A61F2002/2871A61F2002/30985A61F2220/0041A61F2310/00023A61F2310/00179
Inventor 石磊郭佂张涌泉武苏华付军李小康吴智钢
Owner FOURTH MILITARY MEDICAL UNIVERSITY
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