CN220877011U

CN220877011U - 3D prints tantalum metal knee joint filling body

Info

Publication number: CN220877011U
Application number: CN202320119311.4U
Authority: CN
Inventors: 陈志康; 姜尚维; 王莉娟; 朱洪利; 唐文滔
Original assignee: Chongqing Xinsuo Pharmaceutical Technology Co ltd
Current assignee: Chongqing Xinsuo Pharmaceutical Technology Co ltd
Priority date: 2023-01-16
Filing date: 2023-01-16
Publication date: 2024-05-03
Anticipated expiration: 2033-01-16

Abstract

The utility model belongs to the technical field of medical appliances. Relates to a 3D printing tantalum metal knee joint filler, which comprises a supporting part and an embedding part which are integrally formed and are in a porous structure; the support part is provided with a bracket for embedding a tibia tray; the embedded part is arranged at the bottom of the supporting part and is used for being embedded into the tibia marrow cavity. One end of the supporting part far away from the embedded part is provided with a supporting plane, and the supporting plane is contacted with the tibia supporting surface; the bracket is arranged on the supporting plane; one end of the supporting part, which is close to the embedded part, is provided with a limiting step, and the limiting step is used for contacting with the cut tibia end face. The supporting part and the embedded part are integrally formed by adopting tantalum powder through 3D printing. The tantalum metal adopted in the utility model has low elastic modulus and good biocompatibility, the porous tantalum has high stability and good bone guiding property, and bone tissues can be embedded into holes of a porous structure in the bone growth process, so that the torsion bearing capacity is enhanced.

Description

3D prints tantalum metal knee joint filling body

Technical Field

The utility model belongs to the technical field of medical instruments, and relates to a 3D printing tantalum metal knee joint filler.

Background

With the aging of the population of China, the incidence of knee osteoarthritis increases year by year. The artificial unicondylar knee joint prosthesis is adopted for replacing diseased joint cartilage and meniscus and normal joint ligaments and other tissues are reserved in the unicondylar knee joint replacement operation, so that the unicondylar knee joint replacement operation has the advantages of small trauma, quick recovery, reduced pain, more natural movement range and the like, and is widely applied to knee joint treatment.

The artificial knee joint replacement is an orthopedic operation for replacing a diseased joint of a human body by using an artificial biological material and recovering normal physiological functions of the knee joint.

The tibial components used in the current artificial knee joint replacement are divided into two major types, one type of tibial components is assembled by press fit locking of a mechanical mechanism, and in order to meet clinical requirements, manufacturers are usually required to produce a plurality of types of tibial components which only have differences in thickness, so that the replacement operation cost is high, the burden of the operation cost of patients is heavy, and the product micro-motion cannot be stopped; another type of tibial component is a unitary body of ultra-high molecular weight polyethylene, and in order to meet clinical needs, manufacturers are also required to produce a variety of such tibial components that differ only in thickness, which also results in higher cost of replacement surgery and heavier burden of patient surgery costs.

Chinese patent No. 110680570a provides a tibial prosthetic locking assembly and an artificial knee prosthesis comprising: a tibial plateau, a tibial insert, and a fixation portion; through with tibial insert joint on the tibial plateau, the removal of restriction tibial insert avoids the tibial insert to keeping away from the orientation of tibial plateau and removes, inserts fixed part simultaneously in the fixed slot that encloses between tibial plateau and the tibial insert and establishes, forms and avoids the tibial insert for the pivoted resistance of tibial plateau, fixes the tibial insert on the tibial plateau, has realized simplifying the locking structure between tibial plateau and the tibial insert, improves firm in connection, effectively improves the technological effect of tibial prosthesis life.

However, the locking structure is complex in processing structure and high in cost, and more importantly, the stability between the tibial tray and the tibial insert is enhanced in the prior art, the problem that torsion is easy to occur when torsion is applied between the prosthesis and the tibia is ignored, so that the structural bearing capacity between the tibial tray and the tibia is weaker, the torsion of the tibial prosthesis in the tibia is caused when the tibial tray is used for a long time, the tibia abrasion is aggravated, and the service life is poor.

Disclosure of utility model

In view of the above, the present utility model aims to solve the above-mentioned drawbacks and provide a 3D printed tantalum knee joint filler.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

A3D prints the tantalum metal knee joint filling body, including supporting part and embedded part of the integrated into one piece in porous structure; the support part is provided with a bracket for embedding a tibia tray; the embedded part is arranged at the bottom of the supporting part and is used for being embedded into the tibia marrow cavity.

Further, a supporting plane is arranged at one end of the supporting part far away from the embedded part, and the supporting plane is contacted with the tibia supporting surface; the bracket is arranged on the supporting plane; one end of the supporting part, which is close to the embedded part, is provided with a limiting step, and the limiting step is used for contacting with the cut tibia end face.

Further, the outer wall of the embedded part is a fusion surface, and the shape of the fusion surface is matched with the tibia marrow cavity.

Further, a lightening hole is formed in the embedded portion, and the lightening hole is communicated with the bracket.

Further, the supporting part and the embedding part are of a net wire diameter: 0.5-0.6 mm, pore diameter: 0.4-0.6 mm, and porosity > 75%.

Further, the supporting part and the embedded part are integrally formed by adopting tantalum powder through 3D printing.

The utility model has the beneficial effects that:

1. The knee joint filling body improves the stability of the tibial tray fixed on the tibia, and bone tissues can be embedded into holes of the porous structure in the bone growth process, so that the torsion bearing capacity is enhanced, and the combination of the bone and the filling body is more stable.

2. The knee joint filling body is formed by 3D printing of tantalum metal, the tantalum metal has low elastic modulus and good biocompatibility, and the porous tantalum has high stability and good bone guiding property, so that the knee joint filling body is an ideal bone replacement repair material. Additive manufacturing techniques may enable "body tailoring" to prepare individual implants.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.

Drawings

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in the following preferred detail with reference to the accompanying drawings, in which:

FIG. 1 is a schematic diagram of a 3D printed tantalum metal knee filler in accordance with the present utility model;

FIG. 2 is a schematic view of a partial structure of a 3D printed tantalum knee filler of the present utility model;

FIG. 3 is a top view of a 3D printed tantalum metal knee filler in accordance with the present utility model;

FIG. 4 is a pictorial view of a 3D printed tantalum metal knee filler in accordance with the present utility model;

FIG. 5 is a schematic view of a prior art tibial tray;

FIG. 6 is a schematic illustration of the installation of a 3D printed tantalum metal knee filler in accordance with the present utility model;

Fig. 7 is a cross-sectional view of fig. 6.

Reference numerals: 1-a support; 2-an embedding part; 3-a tibial tray; 4-tibia; 11-brackets; 12-limiting steps; 13-limiting steps; 21-fusion plane; 22-lightening holes; 41-tibial intramedullary canal.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present utility model by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.

Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the utility model; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present utility model, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1 to 7, a 3D printed tantalum metal knee joint filler comprises a supporting portion 1 and an embedding portion 2 which are integrally formed and have a porous structure; the supporting part 1 is provided with a bracket 11 for embedding the tibia tray 3; the insert 2 is provided at the bottom of the support 1 for insertion into the tibial intramedullary canal 41.

One end of the supporting part 1 far away from the embedded part 2 is provided with a supporting plane which is contacted with the bottom surface of the tibia support 3; the bracket 11 is arranged on the supporting plane; one end of the supporting part 1, which is close to the embedded part 2, is provided with a limiting step 12 and a limiting step 13, and the limiting steps 12 and 13 are used for being in contact with the end face of the cut tibia 4.

The outer wall of the embedding part 2 is a fusion surface 21, and the shape of the fusion surface 21 is matched with that of the tibia marrow cavity 41. The embedded part 2 is internally provided with a lightening hole 22, and the lightening hole 22 is communicated with the bracket 11.

The supporting part 1 and the embedding part 2 are of net wire diameters: 0.5-0.6 mm, pore diameter: the porous structure with 0.4-0.6 mm and porosity of >75% is formed by integrally adopting tantalum powder through 3D printing, and the supporting part 1 and the embedded part 2 comprise the following tantalum powder components in percentage by mass: c: less than or equal to 0.012, O: less than or equal to 0.010, N: less than or equal to 0.010, H: less than or equal to 0.002, fe: less than or equal to 0.010, ti: less than or equal to 0.005, mo: less than or equal to 0.020, ni: less than or equal to 0.010, nb: less than or equal to 0.05, and the balance of Ta.

The knee joint filling body is supported between the tibia and the tibia support and is formed by 3D printing of tantalum metal, the tantalum metal has low elastic modulus and good biocompatibility, and the porous tantalum has high stability and good bone guiding property, so that the knee joint filling body is an ideal bone substitute repairing material. The 3D printing technology can be adopted to realize the preparation of the individual implant by 'body-building and tailoring'.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present utility model, which is intended to be covered by the claims of the present utility model.

Claims

1. 3D prints tantalum metal knee joint obturator, its characterized in that: comprises a supporting part and an embedded part which are integrally formed and are in a porous structure; the support part is provided with a bracket for embedding a tibia tray; the embedded part is arranged at the bottom of the supporting part and is used for being embedded into the tibia marrow cavity.

2. The 3D printed tantalum metal knee filler of claim 1, wherein: one end of the supporting part far away from the embedded part is provided with a supporting plane, and the supporting plane is contacted with the tibia supporting surface; the bracket is arranged on the supporting plane; one end of the supporting part, which is close to the embedded part, is provided with a limiting step, and the limiting step is used for contacting with the cut tibia end face.

3. The 3D printed tantalum metal knee filler of claim 2, wherein: the outer wall of the embedded part is a fusion surface, and the shape of the fusion surface is matched with the tibia marrow cavity.

4. The 3D printed tantalum metal knee filler of claim 3, wherein: the embedded part is internally provided with a lightening hole which is communicated with the bracket.

5. The 3D printed tantalum metal knee filler of claim 1, wherein: the supporting part and the embedding part are of net wire diameters: 0.5-0.6 mm, pore diameter: 0.4-0.6 mm, and porosity > 75%.

6. The 3D printed tantalum metal knee filler of claim 1, wherein: the supporting part and the embedded part are integrally formed by adopting tantalum powder through 3D printing.