CN219397761U

CN219397761U - Radius prosthesis

Info

Publication number: CN219397761U
Application number: CN202320493535.1U
Authority: CN
Inventors: 邱健; 杨延超; 纪娟; 陈华磊
Original assignee: Shaanxi Ruiyi Medical Technology Co ltd
Current assignee: Shaanxi Ruiyi Medical Technology Co ltd
Priority date: 2023-03-14
Filing date: 2023-03-14
Publication date: 2023-07-25
Anticipated expiration: 2033-03-14

Abstract

The utility model discloses a radius prosthesis, which comprises a prosthesis joint surface entity, wherein the bottom of the prosthesis joint surface entity is connected with a radius far-end lattice; the bottom of the radius far-end lattice is connected with a prosthesis intermediate entity, the bottom of the prosthesis intermediate entity is connected with a radius near-end lattice, and the bottom of the radius near-end lattice is provided with a fixing device; one or more ligament holes penetrating through the inside of the radius distal dot matrix are arranged in the radius distal dot matrix, and the ligament holes are provided with through holes formed by surrounding the side walls and serve as connecting paths for breaking ligaments. The radius far-end lattice and the radius near-end lattice are porous entities with the aperture of 0.5mm-0.8mm and the porosity of 40% -80%, so that cells can conveniently grow in the porous entities, and the porous entity is more suitable for cell growth climbing compared with a macroporous structure. The ligament holes arranged in the radius distal dot matrix can be used for conveniently suturing ligaments, connecting paths for broken ligaments and playing a role in suturing and fixing the ligaments.

Description

Radius prosthesis

Technical Field

The utility model belongs to the technical field of medical appliances, and particularly relates to a radius prosthesis.

Background

The radius is an important bone that constitutes the forearm and serves the function of rotation of the forearm, as well as rotation of the wrist. Because of the fracture of the crushed radius and the tumor of the radius caused by external factors, the traditional bone tumor treatment process mainly makes diagnosis and makes an operation scheme according to two-dimensional image information such as X-ray, CT, MRI and the like, when bone defects are rebuilt after tumor excision, allogeneic bone or finished prosthesis is generally selected for implantation, but the matching performance is often poor, and the host bone is only marginally adapted to the bone through shaping transformation, so that the operation time is prolonged.

Because bone tumors and comminuted fracture can destroy the shape of the radius, in order to ensure the original functionality and the aesthetic property of the prosthesis and ensure a good degree of fit with surrounding residual tissues, the design level of doctors and engineers is required to be high at present.

Patent application CN 108245288A discloses a 3D printing prosthesis for treating distal radius tumor and a manufacturing method thereof, wherein one end of the body is provided with a fixing part, the other end is provided with a joint part, the body is composed of polyether ether ketone or a derivative thereof, the surface of the body is provided with porous bionic trabecula, and the edge of the body is provided with a penetrating attachment hole. The polyether-ether-ketone or the derivative thereof is adopted, so that the abrasion of other bones of the implant in the use process is reduced; the material is a nonmetallic material, so that the problems of metal corrosion and allergy and toxicity possibly caused by the metal are reduced. This patent application has designed bone trabecula structure and can be convenient for bone growth income prosthetic model, but this structure hole is great, and has only set up porous structure in one end edge, is unfavorable for cell growth climbing, and healing speed is slower, and the prosthetic model of this patent application can't satisfy the demand that the ligament was sewed up simultaneously, can't sew up cracked ligament fixedly.

Disclosure of Invention

In order to overcome the problems in the prior art, the utility model aims to provide a radius prosthesis, so as to solve the problems that the existing radius prosthesis is slow in healing speed and can not suture and break ligaments.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a radius prosthesis, comprising: the bottom of the prosthesis joint surface entity is connected with a radius far-end lattice;

the bottom of the radius far-end lattice is connected with a prosthesis intermediate entity, the bottom of the prosthesis intermediate entity is connected with a radius near-end lattice, and the bottom of the radius near-end lattice is provided with a fixing device;

the aperture of the radius far-end lattice and the radius near-end lattice are both 0.5mm-0.8mm, and the porosity is 40% -80%;

one or more ligament holes penetrating through the inside of the radius distal dot matrix are arranged in the radius distal dot matrix, and the ligament holes are provided with through holes formed by surrounding the side walls and serve as connecting paths for breaking ligaments.

Optionally, the distal radius lattice and the proximal radius lattice are each composed of a plurality of triangular frames.

Optionally, the diameters of the porous entity of the radius distal lattice and the radius proximal lattice are both 0.3mm-0.5mm.

Optionally, the fixing device is a medullary cavity needle matched with the medullary cavity of the upper arm.

Optionally, the distal radius lattice, the intermediate prosthesis entity and the proximal radius lattice are integrally connected through 3D printing.

Optionally, the distal radius lattice, the intermediate prosthesis entity and the proximal radius lattice are made of titanium alloy, and the articular surface prosthesis entity is made of cobalt-chromium-molybdenum alloy.

Optionally, a preformed hole is formed in the center of the distal radius lattice, a first connecting piece matched with the preformed hole is arranged at the bottom of the prosthesis joint surface entity, and a second connecting piece matched with the preformed hole is arranged at the top of the prosthesis middle entity.

Optionally, the preformed hole is connected with the first connecting piece and the second connecting piece through bonding.

Optionally, the top surface of the prosthesis joint surface entity is an arc-shaped curved surface.

Optionally, the number of the radius prostheses is one or two, one radius prosthesis is mirror image of the healthy side radius, and the two radius prostheses are mirror image of each other.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model comprises a prosthesis joint surface entity, wherein the bottom of the prosthesis joint surface entity is connected with a radius far-end lattice, the bottom of the radius far-end lattice is connected with a prosthesis intermediate entity, the bottom of the prosthesis intermediate entity is connected with a radius near-end lattice, and the radius far-end lattice and the radius near-end lattice are arranged at the two ends of the prosthesis joint surface entity, so that the growth and fusion stability of cells are facilitated. Meanwhile, the radius far-end lattice and the radius near-end lattice are porous entities with the aperture of 0.5mm-0.8mm and the porosity of 40% -80%, so that cells can conveniently grow in the porous entities, and the porous entity is more suitable for cell growth climbing compared with a macroporous structure. The radius distal dot matrix is provided with one or more ligament holes, the ligament holes are provided with through holes formed by surrounding the side walls, the ligament holes can be used for conveniently suturing ligaments, and a broken ligament connection path is provided for playing a role in suturing and fixing the ligaments.

Furthermore, the radius distal lattice and the radius proximal lattice of the present utility model are composed of a plurality of triangular frames, so that the porous solid structure is more stable than the circular hole structure.

Furthermore, the prosthesis joint surface entity is made of cobalt-chromium-molybdenum alloy, and compared with a common titanium alloy prosthesis, the prosthesis joint surface entity is higher in hardness and more durable in friction between bones and meat.

Furthermore, the radius distal dot matrix is provided with the preformed hole, the bottom of the prosthesis joint surface entity is provided with the first connecting piece matched with the preformed hole, and the top of the prosthesis middle entity is provided with the second connecting piece matched with the preformed hole, so that the combined structure is more stable.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present utility model, and are not particularly limited.

In the drawings:

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic view of the distal radius lattice structure of the present utility model;

FIG. 3 is a flow chart of the method of the present utility model;

wherein, the device comprises a 1-prosthesis joint surface entity, a 2-radius far-end lattice, a 21-ligament hole, a 22-preformed hole, a 3-prosthesis intermediate entity, a 4-radius near-end lattice and a 5-marrow cavity needle.

Detailed Description

In order to make the technical solution of the present utility model better understood by those skilled in the art, the technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, shall fall within the scope of the utility model.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The present utility model will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, the radius prosthesis of the utility model comprises a prosthesis joint surface entity 1, wherein the bottom of the prosthesis joint surface entity 1 is connected with a radius distal dot matrix 2, the bottom of the radius distal dot matrix 2 is connected with a prosthesis intermediate entity 3, and the bottom of the prosthesis intermediate entity 3 is connected with a radius proximal dot matrix 4. The bottom of the proximal radius array 4 is connected with a medullary cavity needle 5 which is used for being inserted into the medullary cavity of the upper arm and keeping stable.

The shape of the top of the prosthetic facet entity 1 matches the shape of the palmar joint. The radius far-end lattice 2 and the radius near-end lattice 4 are porous entities, the aperture of the radius far-end lattice 2 and the radius near-end lattice 4 are 0.5mm-0.8mm, and the porosity of the radius far-end lattice 2 and the radius near-end lattice 4 is 40% -80%. Compared with a macroporous structure, the porous solid structure is more suitable for cell growth climbing. When the porous entity is designed, the original entity part is split through a Delould triangle splitting method, the split line is used as a rod piece of the frame structure, and the split entity is used as a hole, so that the internal communication of a lattice can be kept, and the removal of powder is ensured. Wherein the frame part is a rod piece with the diameter of 0.3-0.5 mm.

The distal radius lattice 2, the intermediate prosthesis 3, the proximal radius lattice 4 and the intramedullary pin 5 are integrally connected through 3D printing. The distal radius lattice 2, the intermediate prosthesis 3, the proximal radius lattice 4 and the intramedullary nail 5 are all made of titanium alloy, and the articular surface prosthesis 1 is made of cobalt-chromium-molybdenum alloy, which has higher hardness, higher friction resistance and longer service life than titanium alloy. The center of the radius distal dot matrix 2 is provided with a preformed hole 22, the bottom of the prosthesis joint surface entity 1 is provided with a first connecting piece matched with the preformed hole 22, and the top of the prosthesis middle entity 3 is provided with a second connecting piece matched with the preformed hole 22. The preformed hole 22 is connected with the first connecting piece and the second connecting piece in an adhesive mode.

The periphery of the preformed hole 22 of the radius distal dot matrix 2 is circumferentially provided with a plurality of ligament holes 21, the ligament holes 21 are provided with through holes with side walls circumferentially formed, and the ligament holes 21 penetrate through the radius distal dot matrix 2. The ligament hole 21 can facilitate suturing the ligament, provide a broken ligament connection path, and play a role in ligament suturing and fixing.

The method of making the present utility model is further described below with reference to fig. 3.

In this embodiment, one side of the patient's body has healthy arms and the other side has tumors.

The utility model relates to a radius prosthesis, which comprises the following manufacturing steps:

firstly, CT data of a radius part of a patient are acquired, a data model is imported into a computer, and the radius is rebuilt by using a threshold segmentation method, wherein the threshold range is 111HU-1024HU.

Then separating out tumor tissue in computer, and retaining the defect form of radius and tumor. The healthy side arms are symmetrically exchanged to the affected side arms of the tumor in a computer, and the physical radius prosthesis is designed integrally by referring to the healthy side arm model. The method comprises the steps of designing a radius prosthesis virtual model, wherein a ligament hole 21 penetrating through the inside of the radius distal dot matrix 2 virtual model is arranged in the radius distal dot matrix 2 virtual model, a preformed hole 22 is arranged in the center of a prosthesis joint surface entity 1, a first connecting piece matched with the preformed hole 22 is arranged at the bottom of the prosthesis joint surface entity 1, and a second connecting piece matched with the preformed hole 22 is arranged at the top of a prosthesis middle entity 3.

The original solid model of the distal radius lattice 2 and the proximal radius lattice 4 is split into a plurality of triangular frame structures by a Deluo inner triangle splitting method in a computer, the triangular splitting line is used as a solid for printing, the split solid is used as a hole, wherein the diameter of the frame is 0.3-0.5mm, the aperture is 0.5-0.8 mm, and the porosity is 40-80%.

The prosthesis joint surface entity 1 is printed by taking cobalt-chromium-molybdenum alloy as a material in a 3D printing mode, and the radius distal dot matrix 2, the prosthesis intermediate entity 3, the radius proximal dot matrix 4 and the intramedullary canal needle 5 are printed by taking titanium alloy as a material in an integrated mode. Finally, the preformed hole 22 of the prosthetic joint surface entity 1 is matched with the first connecting piece and the second connecting piece and is bonded and fixed.

The device elements in the above embodiments are conventional device elements unless otherwise specified, and the structural arrangement, operation or control modes in the embodiments are conventional arrangement, operation or control modes in the art unless otherwise specified.

Finally, it is noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present utility model, and that other modifications and equivalents thereof by those skilled in the art should be included in the scope of the claims of the present utility model without departing from the spirit and scope of the technical solution of the present utility model.

Claims

1. A radius prosthesis comprising:

the bottom of the prosthesis joint surface entity (1) is connected with a radius far-end lattice (2);

the bottom of the radius far-end lattice (2) is connected with a prosthesis intermediate entity (3), the bottom of the prosthesis intermediate entity (3) is connected with a radius near-end lattice (4), and the bottom of the radius near-end lattice (4) is provided with a fixing device;

the aperture of the radius far-end lattice (2) and the radius near-end lattice (4) are 0.5mm-0.8mm, and the porosity is 40% -80%;

the radius distal dot matrix (2) is provided with one or more ligament holes (21) penetrating through the inside of the radius distal dot matrix, and the ligament holes (21) are provided with through holes formed by surrounding the side walls of the ligament holes to serve as connecting paths of broken ligaments.

2. A radius prosthesis according to claim 1, characterized in that the distal radius lattice (2) and the proximal radius lattice (4) are each composed of a plurality of triangular frames.

3. A radius prosthesis according to claim 1, characterized in that the porous entity of the distal radius lattice (2) and the proximal radius lattice (4) are each 0.3-0.5mm in diameter.

4. A radius prosthesis according to claim 1, characterized in that the fixation means is a intramedullary pin (5) matching the intramedullary canal of the upper arm.

5. A radius prosthesis according to claim 1, characterized in that the distal radius lattice (2), the intermediate prosthesis (3) and the proximal radius lattice (4) are integrally connected by 3D printing.

6. A radius prosthesis according to claim 1, characterized in that the distal radius lattice (2), the intermediate prosthesis (3) and the proximal radius lattice (4) are all made of titanium alloy, and the articular surface prosthesis (1) is made of cobalt chromium molybdenum alloy.

7. A radius prosthesis according to claim 1, characterized in that the radius distal lattice (2) is provided with a preformed hole (22) in the center, the bottom of the prosthesis articular surface entity (1) is provided with a first connecting piece matched with the preformed hole (22), and the top of the prosthesis intermediate entity (3) is provided with a second connecting piece matched with the preformed hole (22).

8. A radius prosthesis according to claim 7, characterized in that the preformed hole (22) is connected to both the first and second connection elements by means of an adhesive bond.

9. A radius prosthesis according to claim 1, characterized in that the top surface of the prosthesis articular surface entity (1) is an arc-shaped curved surface.

10. A radius prosthesis according to claim 1, wherein the number of said radius prostheses is one or two, one said radius prosthesis being mirror images of the healthy side radius and two said radius prostheses being mirror images of each other.