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3D-printed porous tantalum metal bone plate

A 3D printing, bone plate technology, applied in the field of medical implants, can solve the problems of easy loosening of bone plates implanted in the human body, increase patient pain and economic burden, mismatch of elastic modulus of bone tissue, etc., and achieve optimal biomechanics. performance, improve osseointegration performance, excellent osseointegration effect

Active Publication Date: 2019-05-24
赵德伟 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the bone plate is implanted in the body, it will cause a series of problems if it exists for a long time, such as the mismatch between the elastic modulus of the bone plate and the bone tissue at the implanted site, which will cause stress shielding and adversely affect the healing of bone tissue, or the length of the bone plate It is prone to loosening after being implanted in the human body for a long time
Due to the existence of these adverse symptoms, a second operation is usually required to remove the implanted bone plate, which further increases the pain and financial burden of the patient

Method used

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  • 3D-printed porous tantalum metal bone plate
  • 3D-printed porous tantalum metal bone plate
  • 3D-printed porous tantalum metal bone plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as Figure 1-2Shown is a porous tantalum metal bone plate, which is a bone-like trabecular bone plate with osteoinductive properties produced by 3D printing with tantalum metal powder as the base material. The bone plate includes a bone plate body. The bone plate body is a porous structure 2, and also includes reinforcing ribs and fixing holes 3. The external reinforcing ribs 4 are located around the bone plate body, and the internal reinforcing ribs 4 are located inside the external reinforcing ribs 1 in a mesh structure. The porous structure 2 is provided with a fixing hole 3, the fixing hole 3 is a screw hole, the screw hole 3 is located on the centerline of the bone plate, and the screw hole 3 on the bone plate is a surface counterbore, which is convenient for screw fixation and will not Irritation of the surrounding tissue due to the protrusion of the screw. The reinforcing rib is a metal entity, the ratio of the porous part to the solid part is 5:1 to 3:1, t...

Embodiment 2

[0044] Such as Figure 1-2 Shown is a porous tantalum metal bone plate, which is a bone-like trabecular bone plate with osteoinductive properties produced by 3D printing with tantalum metal powder as the base material. The bone plate includes a bone plate body. The bone plate body is a porous structure 2, and also includes reinforcing ribs and fixing holes 3. The reinforcing ribs include external reinforcing ribs 1 and internal reinforcing ribs 4, the external reinforcing ribs are located around the bone plate body, and the internal reinforcing ribs 4 It is located inside the external reinforcing rib and has a mesh structure. The porous structure is provided with fixing holes, the fixing holes are screw holes 3, and the screw holes 3 are located on the centerline of the bone plate. The screw holes 3 on the bone plate are shaped like The surface countersunk hole is convenient for screw fixation, and the protrusion of the screw will not irritate the surrounding tissue. The rein...

Embodiment 3

[0057] Such as Figure 1-2 Shown is a porous tantalum metal bone plate, which is a bone-like trabecular bone plate with osteoinductive properties produced by 3D printing with tantalum metal powder as the base material. The bone plate includes a bone plate body. The bone plate body is a porous structure 2, and also includes reinforcing ribs and fixing holes 3. The reinforcing ribs include external reinforcing ribs 1 and internal reinforcing ribs 4, the external reinforcing ribs 1 are located around the bone plate body, and the internal reinforcing ribs 4 is located inside the external reinforcing rib 1 and has a mesh structure. The porous structure 2 is provided with a fixing hole 3. The fixing hole 3 is a screw hole 3. The screw hole 3 is located on the center line of the bone plate. The bone plate The screw hole 3 is a surface countersunk hole, which is convenient for fixing the screw without stimulating the surrounding tissue due to the protrusion of the screw. The reinforc...

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Abstract

The invention relates to a 3D-printed porous tantalum metal bone plate. The 3D-printed porous tantalum metal bone plate is characterized in that tantalum metal powder is taken as a base material, andthe bone-imitating trabecular bone plate having bone induction property and produced by 3D printing has an interconnecting-pore structure fit for bone growth. The production method includes: under argon production, using medical grade spherical tantalum powder as a raw material to produce the porous bone plate by 3D printing; removing excess metal powder adhering to the surface of the bone plate through sandblasting; removing residual stress through heat treatment to make the surface of the bone plate smooth. By the arrangement, the porous bone plate with the bone induction property can form excellent bone integration with bone tissue so as to achieve permanent fixation in biology.

Description

technical field [0001] The invention relates to a medical implant, in particular to an osteoinductive porous tantalum metal bone plate for treating fractures. Background technique [0002] Fractures are clinically common bone trauma diseases, about one-third of which require implants to assist fracture healing. Among various bone fixation implant devices, bone plate is the most widely used, and the materials used for bone plate are usually stainless steel, titanium and titanium alloy. After the bone plate is implanted in the body, it will cause a series of problems if it exists for a long time, such as the mismatch between the elastic modulus of the bone plate and the bone tissue at the implanted site, which will cause stress shielding, which will adversely affect the healing of bone tissue, or the length of the bone plate. It is easy to loosen when implanted in the human body for a long time. Due to the existence of these adverse symptoms, a second operation is usually re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/80A61L31/02A61L31/14B33Y10/00B33Y80/00
Inventor 赵德伟李军雷王永轩
Owner 赵德伟
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