Prosthesis based on connection structure of porous surface structure and substrate

A technology of surface structure and porous structure, applied in prosthesis, additive manufacturing, medical science, etc., can solve problems such as damage to porous structure, high heat generated by contact, and low bonding efficiency

Pending Publication Date: 2020-04-17
JY MEDICAL DEVICES SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for high-porosity structures, when resistance welding is used to directly connect the porous structure and the substrate, the bonding efficiency is low at this time, resulting in insufficient welding bonding strength or requiring too high a current to achieve sufficient welding strength, The latter causes the contact between the upper electrode and the upper surface of the porous structure to generate too much heat so that the surface of the porous structure is damaged too much, including the sinking of the pore structure. Therefore, the present invention needs to design an intermediate structure between the porous structure and the substrate. Realize that the complex formed by the porous surface structure and the middle bottom plate is closely combined with the substrate to improve the bonding efficiency of the porous structure and the substrate and ensure sufficient welding strength

Method used

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  • Prosthesis based on connection structure of porous surface structure and substrate
  • Prosthesis based on connection structure of porous surface structure and substrate
  • Prosthesis based on connection structure of porous surface structure and substrate

Examples

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Embodiment 1

[0098] Such as figure 2 As shown, the present invention provides a connection structure, including a substrate 23 , an intermediate body 22 , and a porous surface structure 21 . Wherein, the porous structure of the porous surface structure 21 includes many struts (or beams) arranged in a staggered manner, and some multi-directional through-through, regular or irregular pores are formed between these struts (or beams). The intermediate body 22 is located between the porous surface structure 21 and the substrate 23 . Optionally, the intermediate body 22 is a non-porous bottom plate, that is, a solid bottom plate. Both the porous surface structure 21 and the intermediate body 22 are made of conductive materials (such as metal materials). The porous surface structure 21 and the intermediate body 22 are integrally formed, for example, by 3D printing additive manufacturing process, or vapor deposition process.

[0099] Exemplarily, the base 23 is solid, which is beneficial to th...

Embodiment 2

[0110] For the first embodiment above, the porous surface structure 21 is a structure with a certain porosity, the intermediate body 22 is located between the porous surface structure 21 and the substrate 23 , and the intermediate body 22 is a non-porous bottom plate 22 . In fact, the intermediate body 22 can be the solid plate described in the first embodiment, or the porous structure with low porosity described in the second embodiment.

[0111] Therefore, the main difference from Embodiment 1 is that the connection structure of Embodiment 2 includes a first porous structure 41 in a high-porosity region, a second porous structure 42 in a low-porosity region (as an intermediate) and a substrate 43 ,Such as Figure 4a shown. The second porous structure 42 is located between the first porous structure 41 and the substrate 23 .

[0112] Illustratively, the porous structures of the first porous structure 41 and the second porous structure 42 both contain numerous staggered supp...

Embodiment 3

[0119] For the first embodiment above, the top of the negative electrode 25 is in close contact with the bottom of the substrate 23, and the bottom of the positive electrode 24 is in close contact with the top of the porous surface structure 21; optionally, the positive electrode 24 and the negative electrode 25 are large The positive electrode 24 covers the top of the porous surface structure 21 , and the negative electrode 25 covers the bottom of the substrate 23 . Since the large-planar positive electrode 24 of Embodiment 1 is pressed on the top of the porous surface structure 21, the large-planar positive electrode 24 contacts and squeezes the surface of the porous surface structure 21, causing damage to the surface of the porous surface structure 21, for example, due to being Depression occurs due to pressure, and blackening, depression, and reduction of pore space are caused by temperature rise due to contact resistance heat generation.

[0120] In order to protect the s...

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Abstract

The present invention discloses a prosthesis based on a connection structure of a porous surface structure and a substrate. The connection structure comprising: a composite body comprising the poroussurface structure and an intermediate connected in advance; the substrate which is used for forming a prosthesis main body, wherein the surface of the prosthesis main body is taken a connecting area and is connected with the composite body; and the intermediate which is located between the porous surface structure and the substrate, and is connected with the connecting area of the prosthesis mainbody, so that the porous surface structure is located in the connectingarea of the prosthesis main body; wherein the substrate and the composite body are arranged between a first polar electrode and asecond polar electrode, and are in electric contact with the porous surface structure and/or the intermediate through the first polar electrode, and the substrate is in electric contact with the second polar electrode, so that a current loop is formed, and resistance welding of the intermediate and the substrate is realized. The composite body and the substrate are connected through a resistancewelding method, and the mechanical property of the substrate is kept; it is ensured that the artificial implant prosthesis has excellent bone ingrowth performance, and the strength of the substrate isnot substantially affected.

Description

technical field [0001] The invention relates to a connection technology of mechanical structures, in particular to a medical device, and provides a prosthesis based on a connection structure of a porous surface structure and a substrate. Background technique [0002] Engineering applications often have different requirements on the overall performance and surface performance of mechanical structures. For example, the overall performance (such as fatigue strength) of the acetabular cup and femoral stem of the artificial hip joint must meet the dynamic load that the prosthesis bears when it is implanted in the body for decades, with an average of one million to two million walks per year In addition, there are specific performance requirements for the surface of the prosthesis, so as to meet the firm combination of the surface of the prosthesis and the patient's bone group and ensure that the prosthesis does not loosen; otherwise, the patient will have pain, and the prosthesis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/30A61F2/32A61F2/34A61F2/36
CPCA61F2/30771A61F2/30942A61F2/30767A61F2/36A61F2/34A61F2/3609A61F2/3662A61F2/32A61F2002/30329A61F2002/30784A61F2002/30985A61F2002/3625A61F2002/365A61F2002/3652A61F2002/3654A61F2002/3678
Inventor 姚建清史金虎
Owner JY MEDICAL DEVICES SHANGHAI CO LTD
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