CN216090947U - Ankle joint prosthesis for distal tibia - Google Patents
Ankle joint prosthesis for distal tibia Download PDFInfo
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- CN216090947U CN216090947U CN202122152289.7U CN202122152289U CN216090947U CN 216090947 U CN216090947 U CN 216090947U CN 202122152289 U CN202122152289 U CN 202122152289U CN 216090947 U CN216090947 U CN 216090947U
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Abstract
The present invention provides an ankle prosthesis for the distal tibia, comprising: the tibia intramedullary pin is used for inserting the insertion end of the tibia intramedullary pin into a medullary cavity at the proximal end of the tibia; one end of the tibia far-end fixing body is matched and connected with the tibia marrow needle awl, and the other end of the tibia far-end fixing body is connected with the tibia far end through a locking nail; the tibia far-end fixing body is provided with a convex upright post on the end face close to one side of the tibia far end, and the convex upright post is used for being inserted into a talus. The advantages are that: can realize long-term biological fixation after operation, has large contact area, short time for realizing stable biological fixation, and is not easy to have the problems of fracture, displacement, dislocation and the like.
Description
Technical Field
The utility model relates to the technical field of artificial prosthesis replacement, in particular to an ankle joint prosthesis for the far end of tibia.
Background
With the development of medical technology, it is becoming more and more common to treat ankle joints of human bodies by replacing the ankle joints with prostheses when the ankle joints are diseased or fractured by external force.
However, as long-term follow-up observation after implantation shows that the existing tibial prosthesis still has defects, such as long time consumption for stable biological fixation after operation and easy fracture when the prosthesis bears large force, which causes complications such as displacement and dislocation of the ankle joint prosthesis; in addition, the existing prosthesis has the defects of single structure, no consideration of complexity of human bone conditions and the like, slow bone growth time, long time for realizing long-term biological fixation and the like.
SUMMERY OF THE UTILITY MODEL
The present invention provides an ankle joint prosthesis for the distal tibia, with the aim of overcoming at least one of the technical drawbacks mentioned above, making the prosthesis implantation stable and relatively fast for long-term biological fixation.
In order to realize the purpose of the utility model, the utility model provides the following technical scheme:
an ankle prosthesis for a distal tibia, comprising:
the tibia intramedullary pin is used for inserting the insertion end of the tibia intramedullary pin into a medullary cavity at the proximal end of the tibia;
one end of the tibia far-end fixing body is matched and connected with the tibia marrow needle awl, and the other end of the tibia far-end fixing body is connected with the tibia far end through a locking nail;
the tibia far-end fixing body is provided with a convex upright post on the end face close to one side of the tibia far end, and the convex upright post is used for being inserted into a talus.
Preferably, the tibial broach comprises a broach inserting part and a broach connecting part which is integrally formed with the broach inserting part, wherein the upper end of the broach connecting part is connected with the broach inserting part, and the lower end of the broach connecting part is in taper fit connection with the tibial distal end fixing body;
the broach connecting part is provided with a taper hole in one end close to the tibia far-end fixing body, and one end of the tibia far-end fixing body departing from the upright post is provided with a taper column in fit connection with the taper hole.
Preferably, one end of the broach connecting part close to the tibia far-end fixing body is provided with a convex part with an arc-shaped cross section along the circumferential direction;
and one end of the tibia far-end fixing body, which deviates from the upright post, is provided with a concave part matched with the convex part, and the concave part is used for connecting the broach connecting part with the tibia far-end fixing body.
Preferably, at least 3 strip-shaped anti-rotation grooves are formed in the broach insertion part at equal intervals along the circumferential direction of the broach insertion part, and the anti-rotation grooves are formed in the length direction of the broach insertion part.
Preferably, be equipped with on the fixed body of shin bone distal end a plurality of nail way hole that is used for the locking nail to penetrate is seted up to one side of stand, and the locking nail follow insert the talus on the fixed body of shin bone distal end, be used for with the fixed body of shin bone distal end is connected fixedly with the talus.
Preferably, the surfaces of the upright posts, which are in contact with the talus, are provided with a bone trabecula porous structure.
The ankle joint prosthesis for the distal tibia of the present invention has the advantages that:
1. the prosthesis provided by the utility model can realize long-term biological fixation after operation, has large contact area, short time for realizing stable biological fixation, and is not easy to have the problems of fracture, displacement, dislocation and the like;
2. the prosthesis is formed by two structures which are connected in a tapered manner, and the single tapered fit not only shortens the period of providing products by the prosthesis, but also enables the operation to be more convenient and faster;
3. the post is arranged at one end of the tibia far-end fixing body connected with the talus in the prosthesis, and the specific height of the post is limited, so that after the prosthesis is implanted, the post is implanted into the talus, the contact area of the prosthesis and human sclerotin is increased, the number of bone growing positions is increased, and meanwhile, the structure of the utility model is fixedly connected with the talus by combining the locking nail, so that the advantages of more stability and firmness after the prosthesis is operated and difficulty in displacement are realized;
in addition, a first trabecular bone porous structure is arranged on the contact surface of the stand column and the talus, and parameters such as the aperture, the thickness and the like of the first trabecular bone porous structure are limited, so that the intraoperative quick positioning can be realized, meanwhile, the postoperation prosthesis front and back deviation can be prevented, and the condition that the prosthesis damages bones is avoided;
4. according to the utility model, the design of the second trabecular bone porous structure on the end surface of the tibia far-end fixing body, which is far away from the tibia intramedullary nail, and the limitation of parameters such as the aperture and the thickness of the second trabecular bone porous structure ensure that the second trabecular bone porous structure is beneficial to crawling and realizes quick implantation;
5. the structural design of the anti-rotation groove on the insertion part of the broach can effectively prevent the prosthesis and the proximal end of the tibia from moving relatively, and the long-term stability of the prosthesis in a human body is improved;
in addition, the length and the diameter of the insertion part of the broach can be designed according to the backbone retention length and the diameter of the medullary cavity at the position of CT data measurement of a patient, so that the tibial broach is used for the patient, and customized personalized design is realized;
6. according to the utility model, the porous structure layer is coated on the surface of the broach connecting part, and the size of the porous structure layer is limited, so that the porous structure coating on the surface is embedded in the proximal end of the tibia, and the bone ingrowth fixation after the operation is facilitated to achieve the medium-term and long-term stability;
7. the prosthesis structure is manufactured by adopting a 3D printing rapid forming process of a pure tantalum material, and the tibia broach is manufactured by adopting a non-toxic forged titanium alloy material, so that the prosthesis has good mechanical property and biocompatibility, and has no substances toxic to human cells.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model. In the drawings:
FIG. 1 is a front view of an ankle prosthesis for the distal tibia according to the present invention;
FIG. 2 is a schematic structural view of FIG. 1 without a porous structure layer;
FIG. 3 is a schematic structural view of a tibial broach;
FIG. 4 is a cross-sectional view taken at angle A-A of FIG. 3;
FIG. 5 is a schematic structural view of a distal tibial fixation body;
FIG. 6 is a view showing a state of use of the ankle prosthesis for the distal tibia according to the present invention;
wherein:
the tibial broach comprises a tibial broach 1, a broach inserting part 11, a broach connecting part 12, a taper hole 13, a bulge part 14, a porous structure layer 15 and an anti-rotation groove 16;
the tibia far-end fixing body 2, a stand column 21, a conical column 22, a concave part 23, a spike hole 24, a first trabecular bone porous structure 25 and a second trabecular bone porous structure 26;
proximal tibia 3, talus 4, fibula 5.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.
Example one
The object of this embodiment is to provide an ankle prosthesis for the distal tibia, according to what is shown in figures 1, 2 and 5, comprising
A tibia broach 1 for inserting its insertion end into the medullary cavity of the tibia proximal end 3;
one end of the tibia far-end fixing body 2 is in taper fit connection with the tibia intramedullary nail 1, and the other end of the tibia far-end fixing body is connected with the tibia far end through a locking nail;
the tibia far-end fixing body 2 is provided with a convex upright post 21 on the end surface close to the tibia far-end side for inserting the talus 4.
In a specific implementation, the height of the upright 21 is 10-15mm to avoid damage to the bone by the prosthesis. The tibia intramedullary pin 1 is made of a non-toxic forged titanium alloy material, so that toxic damage of the prosthesis to human cells can be reduced;
the preparation principle of this example is: according to CT data of a patient, the data of the distal end of the femur is reconstructed in a three-dimensional mode by applying a reverse principle, mirror images can be carried out according to healthy side data, defects of bones and joints after ankle bones and soft tissue tumor sections are removed are replaced, and reconstruction of limb length and ankle joint function of the patient is achieved. Through individuation 3D printing shin bone distal end stationary part 2, adopt the bone of joint contact surface to go into design and joint distal end locking nail way prediction before art, it provides near term and long term stability to go into for the bone of shin bone distal end.
The beneficial effect of this embodiment is:
the tibia broach 1 and the tibia far-end fixing body 2 are in taper fit connection to form a prosthesis, so that the period of products provided by the prosthesis is shortened through single taper fit, and the operation is more convenient; one end of the prosthesis extends into a medullary cavity of the proximal tibia end 3, and the other end of the prosthesis is inserted into the talus 4 through the upright post 21 and connected through the locking nail, so that the prosthesis can be quickly positioned, and the prosthesis can be prevented from shifting forwards and backwards after operation;
example two
According to the ankle joint prosthesis for the tibia distal end according to the first embodiment, as shown in fig. 3 and 5, the tibia broach 1 includes a broach insertion portion 11 and a broach connecting portion 12 integrally formed therewith, the upper end of the broach connecting portion 12 is connected with the broach insertion portion 11, and the lower end is connected with the tibia distal end fixing body 2 in a tapered manner;
a taper hole 13 is formed in one end, close to the tibia far-end fixing body 2, of the broach connecting portion 12, and a taper column 22 in adaptive connection with the taper hole 13 is arranged at one end, away from the upright column 21, of the tibia far-end fixing body 2.
The broach inserting part 11 is used for connecting a medullary cavity of the proximal tibia end 3, measuring the backbone reserved length and the medullary cavity diameter according to CT data of a patient, and further designing the length and the diameter of the tibial broach 1, so that the tibial broach 1 is suitable for the patient, and customized personalized design is achieved.
The beneficial effects of the above technical scheme are:
the tibia intramedullary nail 1 is more closely connected with the tibia far-end fixing body 2, the part is convenient to process and produce, and meanwhile, the matching precision of the part is effectively guaranteed.
EXAMPLE III
According to the tibial prosthesis for the tibialis distal joint of the second embodiment, as shown in fig. 3 and 5, a convex part 14 with an arc-shaped cross section is arranged at one end of the broach connecting part 12 close to the tibial far-end fixing body 2 along the circumferential direction;
one end of the tibia far-end fixing body 2, which is far away from the upright post 21, is provided with a concave part 23 matched with the convex part 14, and the concave part is used for connecting the broach connecting part 12 with the tibia far-end fixing body 2.
The beneficial effects of the above technical scheme are:
the matching design of the convex part 14 on the broach connecting part 12 and the concave part 23 on the tibia far-end fixing body 2 can make the prosthesis assembly more convenient and accurate.
Example four
According to the ankle joint prosthesis for the distal tibia according to the second embodiment, as shown in fig. 1 and 3, the outer surface of the broach joint part 12 is coated with a porous structural layer 15, and the thickness is 10-15mm, preferably 15 mm;
the beneficial effects of the above technical scheme are:
the porous structure layer 15 on the surface of the structure is embedded in the proximal tibia 3, so that the bone ingrowth fixation after the operation is facilitated to achieve the medium-term and long-term stability.
EXAMPLE five
According to the ankle joint prosthesis for the distal tibia according to the second embodiment, as shown in fig. 1 to 4 and 6, at least 3 strip-shaped rotation-preventing grooves 16 are formed in the broach insertion portion 11 at equal intervals in the circumferential direction thereof, and the rotation-preventing grooves 16 are formed along the length direction of the broach insertion portion 11.
In the specific preparation process, the groove depth of the anti-rotation groove 16 is 1-3mm, and the specific depth is determined according to the diameter of the broach insertion part 11;
the technical scheme has the beneficial effects that:
the anti-rotation slot 16 is designed to prevent relative movement between the prosthesis of the present invention and the proximal tibia end 3, and to increase the long-term stability of the prosthesis in the human body.
EXAMPLE six
According to the ankle prosthesis for the distal tibia according to embodiment five, as shown in fig. 1 to 4, the anti-rotation groove 16 is configured to be arc-shaped in cross section.
The beneficial effects of the above technical scheme are:
the specific structural design of the square spiral groove can reduce the damage to the medullary cavity in the process of implanting the prosthesis.
EXAMPLE seven
According to the ankle joint prosthesis for the distal tibia according to the first to sixth embodiments, as shown in fig. 1, 2, 5 and 6, a plurality of nail path holes 24 for inserting locking nails are formed in one side of the upright post 21 on the distal tibia fixing body 2, and the locking nails are inserted into the talus 4 from the distal tibia fixing body 2 to connect and fix the distal tibia fixing body 2 and the talus 4.
In a specific implementation process, the number of the nail path holes 24 is preferably 3, and the part of the nail path holes which penetrates out of the tibia far-end fixing body 2 is abutted with the outer side wall of the upright post 21 and then is positioned in the talus 4.
The beneficial effects of the above technical scheme are:
connecting the talus 4 through the nail track hole 24 and the upright post 21 by using a locking nail to fixedly connect the tibia far-end fixing body 2 with the talus 4, so as to provide near-term stability for the bone ingrowth of the tibia far end; in addition, the locking nails of the prosthesis structure are used in small number, and have small influence on bone.
Example eight
According to the ankle joint prosthesis for the distal tibia according to the seventh embodiment, as shown in fig. 5 and 6, the surfaces of the pillars 21 that contact the talus 4 are each provided with a number one trabecular bone porous structure 25. Further, the thickness of the bone trabecula I porous structure 25 is 1-3mm (preferably 1.5mm), the pore diameter is 200-1100 μm, the filament diameter is 200-700 μm, the porosity is 50-80%, and the specific parameters are determined according to actual conditions.
The beneficial effects of the above technical scheme are:
the upright post 21 is of a solid structure, so that the prosthesis can be quickly positioned, the upright post 21 can be quickly fused with a bone by the design of the bone trabecula porous structure 25 on the contact surface of the upright post 21 and the talus 4, and the bone trabecula porous structure 25 can be beneficial to bone crawling due to the limitation of parameters such as specific thickness, aperture and the like of the bone trabecula porous structure 25.
Example nine
According to the ankle joint prosthesis for the distal tibia in the eighth embodiment, as shown in fig. 5 and 6, a second bone trabecular porous structure 26 is arranged on the abutting surfaces of the talus 4 and the fibula 5 and on one side of the distal tibia fixing body 2 far away from the tibia intramedullary nail 1. Further, the thickness of the second trabecular bone porous structure 26 is 3-5mm (preferably 5mm), the pore diameter is 200-1100 μm, the filament diameter is 200-700 μm, the porosity is 50-80%, and the specific parameters are determined according to actual conditions.
The beneficial effects of the above technical scheme are:
so that the tibia far-end fixing body 2 can be rapidly fused in the talus 4 and the fibula 5, and meanwhile, the specific thickness, the pore diameter and other parameters of the second bone trabecular porous structure are limited, so that the second bone trabecular porous structure can be beneficial to bone crawling.
Example ten
According to the ankle joint prosthesis for the tibia far end of any one of the first embodiment to the ninth embodiment, the tibia broach 1 and the tibia far end fixing body 2 are both manufactured by adopting a pure tantalum material 3D printing rapid prototyping process;
the tibia broach 1 is made of a forged titanium alloy material, specifically a Ti6Al7Nb material;
the beneficial effects of this technical scheme are:
3D rapid printing is adopted, personalized design of the prosthesis is achieved, and meanwhile materials are selected, so that the prosthesis is free of toxic and harmful influences on bone after being implanted.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (6)
1. An ankle prosthesis for the distal tibia, comprising: comprises that
A tibia broach (1) for inserting its insertion end into the medullary cavity of the tibia proximal end (3);
the tibia far-end fixing body (2) is connected with the tibia intramedullary nail (1) in a tapered fit mode at one end and is connected with the tibia far end through a locking nail at the other end;
the tibia far-end fixing body (2) is provided with a convex upright post (21) on the end face close to the tibia far-end side, and the convex upright post is used for being inserted into a talus (4).
2. The ankle joint prosthesis for the distal tibia according to claim 1, wherein: the tibia broach (1) comprises a broach inserting part (11) and a broach connecting part (12) which is integrally formed with the broach inserting part, wherein the upper end of the broach connecting part (12) is connected with the broach inserting part (11), and the lower end of the broach connecting part is in conical fit connection with the tibia far-end fixing body (2);
the broach connecting part (12) is provided with a taper hole (13) in one end close to the tibia far-end fixing body (2), and one end of the tibia far-end fixing body (2) departing from the upright post (21) is provided with a taper column (22) in fit connection with the taper hole (13).
3. The ankle joint prosthesis for the distal tibia according to claim 2, wherein: one end of the broach connecting part (12) close to the tibia far-end fixing body (2) is provided with a convex part (14) with an arc-shaped cross section along the circumferential direction;
one end of the tibia far-end fixing body (2) departing from the upright post (21) is provided with a concave part (23) matched with the convex part (14) and used for connecting the broach connecting part (12) with the tibia far-end fixing body (2).
4. The ankle joint prosthesis for the distal tibia according to claim 2, wherein: at least 3 strip-shaped anti-rotation grooves (16) are formed in the broach insertion part (11) at equal intervals along the circumferential direction of the broach insertion part, and the anti-rotation grooves (16) are formed in the length direction of the broach insertion part (11).
5. The ankle prosthesis for the distal tibia according to any one of claims 1 to 4, wherein: be equipped with on the fixed body of shin bone distal end (2) a plurality of nail way hole (24) that are used for the locking nail to penetrate are seted up to one side of stand (21), and the locking nail is followed insert talus (4) on the fixed body of shin bone distal end (2), be used for with the fixed body of shin bone distal end (2) is connected fixedly with talus (4).
6. The ankle joint prosthesis for the distal tibia according to claim 5, wherein: the surface of the upright post (21) contacting with the talus (4) is provided with a bone trabecula porous structure (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122152289.7U CN216090947U (en) | 2021-09-07 | 2021-09-07 | Ankle joint prosthesis for distal tibia |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122152289.7U CN216090947U (en) | 2021-09-07 | 2021-09-07 | Ankle joint prosthesis for distal tibia |
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| CN216090947U true CN216090947U (en) | 2022-03-22 |
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| CN202122152289.7U Active CN216090947U (en) | 2021-09-07 | 2021-09-07 | Ankle joint prosthesis for distal tibia |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113730046A (en) * | 2021-09-07 | 2021-12-03 | 河北春立航诺新材料科技有限公司 | Implant shin bone false body that fuses shin apart from joint |
-
2021
- 2021-09-07 CN CN202122152289.7U patent/CN216090947U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113730046A (en) * | 2021-09-07 | 2021-12-03 | 河北春立航诺新材料科技有限公司 | Implant shin bone false body that fuses shin apart from joint |
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