Porous tantalum metal bone connector and application thereof

A connector and metal bone technology, applied in the direction of bone implants, etc., to avoid stress shielding, meet the mechanical transmission of lower limbs, and facilitate the replacement of crawling growth.

Inactive Publication Date: 2016-03-09
赵德伟 +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a porous tantalum metal bone conn

Method used

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  • Porous tantalum metal bone connector and application thereof
  • Porous tantalum metal bone connector and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, a porous tantalum metal bone connector includes a body 1, two ends of the body are respectively provided with a medullary cavity stem 2, the medullary cavity stem 2 is integrally formed with the body 1, and the medullary cavity stems 2 at both ends of the body 1 Two screw holes 3 are provided on each; the body 1 is a cylindrical solid structure, the medullary cavity stem 2 is a conical solid structure, and the diameter of the medullary cavity stem 2 gradually decreases from the part connected with the body 1 to the end, and The ratio of the diameter of the stem 2 of the medullary cavity at the connecting part of the body 1 to the diameter of the end is 2:1. Wherein, the ratio of the diameter of the medullary cavity stem 2 to the diameter of the body 1 of the connecting part with the body 1 is 1:2, and the ratio of the length of the medullary cavity stem 2 to the length of the body 1 is 1:2.

[0034] The bone connector also includes a connecting s...

Embodiment 2

[0037] The porous tantalum material used in the body 1 of the porous tantalum metal bone connector described in Example 1 is prepared by using a chemical vapor deposition method to reduce the tantalum metal compound to tantalum metal powder, and uniformly deposit on the surface of the graphite carbon skeleton to form a tantalum coating. The tantalum metal compound is tantalum pentachloride; the porosity of the graphite carbon framework is 85%, and the pore diameter is 500 μm; the thickness of the tantalum coating is 40-60 μm.

[0038] The porous tantalum bone connector is prepared by the following method:

[0039] (1) The graphitic carbon skeleton is etched with dilute hydrochloric acid for 10 minutes, washed with water and ethanol in sequence, dried with nitrogen, and placed in the reaction chamber;

[0040] (2) Put the carbon pentachloride powder with a particle size of 400 mesh into the source tank, heat it to 150°C, use high-temperature argon (300°C) as the carrier gas to pass it...

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Abstract

The invention discloses a porous tantalum metal bone connector which is applicable to treatment of limb fracture nonunion, bone nonunion, bone defects and the like. The porous tantalum metal bone connector comprises a body. The two ends of the body are each provided with a medullary space handle. The medullary space handles and the body are integrally formed. At least one screw hole is formed in each medullary space handle. The porous tantalum metal bone connector further comprises connection screws matched with the screw holes. According to the porous tantalum metal bone connector, the structure that the medullary space handles and the body are integrally formed is adopted, the better mechanical strength is achieved, and the risk of prosthesis breakage is effectively reduced. Screw rotating prevention grooves are formed in the medullary space handles, the bone connector and corresponding bone tissue can be fixed, and the problem that an artificial prosthesis is likely to rotate and loosen is effectively reduced. According to the porous tantalum metal bone connector, the preparation method is simple, the cost is low, implementation and clinical application are facilitated, and the requirement of a majority of patients is met.

Description

Technical field [0001] The invention relates to a medical permanent implant, in particular to a medical implant porous tantalum metal bone connector used for the treatment of nonunion of limb fractures, nonunion, bone defects and the like. Background technique [0002] Bone defect after bone tumor resection, nonunion and defect after long bone fracture of limbs are common clinical diseases. How to repair large bone and joint defects caused by bone tumor resection has always been a big problem in orthopedics. Although the bone defect can be repaired by many methods (such as bone graft joint fusion, artificial prosthesis and traditional allograft, etc.), each method has its advantages and disadvantages. At present, frozen allograft bone and joint grafts are mostly used in clinical practice, but the bone joints of allograft allografts take a long time to heal, and some patients do not heal, resulting in nonunion, delayed bone union, allograft bone fractures, etc. complication. No...

Claims

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Application Information

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IPC IPC(8): A61F2/28
CPCA61F2/2846A61F2002/2835
Inventor 赵德伟王本杰谢辉黄诗博尉晓蔚王威
Owner 赵德伟
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