CN113440321B

CN113440321B - Wing type medial and lateral ankle adjustable tumor semi-ankle joint prosthesis

Info

Publication number: CN113440321B
Application number: CN202110764309.8A
Authority: CN
Inventors: 卢敏勋; 屠重棋; 张瑀琦
Original assignee: West China Hospital of Sichuan University
Current assignee: West China Hospital of Sichuan University
Priority date: 2021-07-06
Filing date: 2021-07-06
Publication date: 2022-06-07
Anticipated expiration: 2041-07-06
Also published as: CN113440321A

Abstract

The invention discloses a wing type medial and lateral ankle adjustable tumor semi-ankle joint prosthesis, which comprises a tibia far-end prosthesis, a lateral ankle prosthesis, an medial ankle prosthesis and a prosthesis cover plate, wherein a cover plate connecting part is arranged at one side of the tibia far-end prosthesis; the angle of the external ankle prosthesis and the internal ankle prosthesis relative to the tibia far-end prosthesis is adjustable. The joint prosthesis adopts a single-pole type, can reserve the bone of a patient to the maximum extent, and has small prosthesis loosening and infection risks; the invention adopts an adjustable design, the external ankle prosthesis and the internal ankle prosthesis can be adjusted at any angle relative to the tibia far-end prosthesis so as to adapt to talus bones with different sizes, the universality is high, the time for waiting for prosthesis manufacturing of a patient can be reduced, meanwhile, the prostheses are manufactured in batches, and the cost of a single part is low.

Description

Wing type medial and lateral ankle adjustable tumor semi-ankle joint prosthesis

Technical Field

The invention relates to the field of artificial prosthesis replacement, in particular to a wing type medial and lateral ankle adjustable tumor semi-ankle prosthesis.

Background

The distal tibia is one of the best sites for malignant bone tumors, and the ankle joint, which is the joint with the greatest weight bearing on the human body, is often also affected. After the distal tibiofibula is resected, conventional treatment methods include allogenic bone grafting, autologous fibula grafting, bone transportation, etc., but ankle fusion is not performed, i.e., ankle function is permanently lost, and only neutral position is maintained. The reconstruction of ankle prostheses is increasingly accepted by many people because they retain most of their ankle function. At present, common ankle joint prostheses are bipolar, namely a tibia far-end component and a talus component, the prostheses are complex to install, unnecessary bone loss of the talus is caused, and the risk of loosening and infection is high; the existing ankle joint prosthesis is of a customized type, namely, a tibia far-end prosthesis component is customized according to the tibia far end of a patient or matched with a talus, the prosthesis manufacturing time is long, the operation time of the patient waiting for replacing the prosthesis is long, the infection risk and the hospitalization time are increased, the customized prosthesis is high in cost, and the hospitalization cost of the patient is increased.

Therefore, there is a need to develop a semi-ankle prosthesis that reconstructs the ankle joint, restores its function, and requires the ability to accommodate talus bones of different sizes, reducing the waiting time for the patient, while reducing the cost of hospitalization.

Disclosure of Invention

In order to solve the defects in the prior art, the invention aims to provide the wing type medial and lateral ankle adjustable tumor semi-ankle joint prosthesis which is designed in a single-pole manner, retains the bone of the prosthesis to the greatest extent, can adapt to talus bones of different sizes and has high universality.

In order to achieve the technical purpose, the invention adopts the technical scheme that:

wing type medial and lateral malleolus adjustable type tumour half ankle joint false body, including shin bone distal end false body, outer ankle false body, false body apron, one side of shin bone distal end false body is provided with the apron connecting portion, the lower part outside that is close to the apron connecting portion of shin bone distal end false body is provided with outer ankle connecting portion, and the lower part inboard is provided with the ankle connecting portion, outer ankle false body, ankle false body are connected respectively at outer ankle connecting portion, the upper end of false body apron is fixed in the apron connecting portion through the screw, the lower extreme both sides of false body apron cover outer ankle false body, ankle false body respectively to concatenate outer ankle false body/ankle false body through the screw and be fixed in outer ankle connecting portion/ankle connecting portion, its characterized in that: the angle of the external ankle prosthesis and the internal ankle prosthesis relative to the tibia far-end prosthesis is adjustable.

Further, the lateral malleolus connecting part comprises a first arc surface and a connecting surface vertical to the first arc surface, and a threaded hole is formed in the connecting surface; the outer ankle arc surface of the outer ankle prosthesis is the same as the radius of the first arc surface, the outer ankle prosthesis can rotate along the first arc surface, an outer ankle arc hole is formed in the corresponding threaded hole of the outer ankle prosthesis, the axis of the outer ankle arc hole coincides with the axis of the outer ankle arc surface, and a screw sequentially penetrates through the prosthesis cover plate and the outer ankle arc hole in the outer ankle prosthesis to be connected to the threaded hole of the outer ankle connecting portion.

Furthermore, be equipped with the lug on the connection face, the side of outer ankle false body be provided with the outer ankle locating hole of lug looks adaptation, the inboard corresponding position of false body apron is provided with the apron recess with lug looks adaptation, the lug passes outer ankle false body and connects in the apron recess of false body apron, the axis of lug coincides with the axis of first arc surface mutually, the axis of outer ankle locating hole coincides with the axis of outer ankle arc surface.

Preferably, the lug, the lateral malleolus positioning hole and the cover plate groove are regular polygonal prisms.

Preferably, the projection, the lateral malleolus positioning hole and the cover plate groove are cylindrical.

Further, the medial malleolus connecting part comprises a second arc surface and a second connecting surface perpendicular to the second arc surface, and a threaded hole is formed in the second connecting surface; the ankle joint of the ankle joint prosthesis is characterized in that the ankle joint circular arc surface of the ankle joint prosthesis is the same as the radius of the second circular arc surface, the ankle joint prosthesis can rotate along the second circular arc surface, an ankle joint arc hole is formed in the corresponding threaded hole of the ankle joint prosthesis, the axis of the ankle joint arc hole coincides with the axis of the ankle joint circular arc surface, and a screw sequentially penetrates through the prosthesis cover plate and the ankle joint arc hole in the ankle joint prosthesis and is connected to the threaded hole of the ankle joint part.

Furthermore, a second convex block is arranged on the connecting surface, an inner ankle positioning hole matched with the second convex block is formed in the side surface of the inner ankle prosthesis, a cover plate second groove matched with the second convex block is formed in the corresponding position of the inner side of the prosthesis cover plate, the second convex block penetrates through the inner ankle prosthesis and is connected into the cover plate second groove of the prosthesis cover plate, the axis of the second convex block coincides with the axis of the second arc surface, and the axis of the inner ankle positioning hole coincides with the axis of the inner ankle arc surface.

Preferably, the second projection, the medial malleolus positioning hole and the cover plate second groove are regular polygonal prisms.

Furthermore, a plurality of through holes are formed in the external ankle prosthesis and the internal ankle prosthesis, the through holes in the external ankle prosthesis are parallel to the connecting surface, and the through holes in the internal ankle prosthesis are parallel to the second connecting surface.

Furthermore, the upper part of the tibia far-end prosthesis is provided with an assembly section which is in a cone frustum shape.

Compared with the prior art, the invention has the beneficial effects that:

1) the wing type internal and external ankle adjustable tumor semi-ankle joint prosthesis adopts a monopolar type, can reserve the bone of a patient to the maximum extent, and has small prosthesis loosening and infection risks.

2) The wing type medial and lateral ankle adjustable tumor semi-ankle joint prosthesis adopts an adjustable design, the lateral ankle prosthesis and the medial ankle prosthesis can be adjusted at any angle relative to the tibia far-end prosthesis, and the wing type medial and lateral ankle adjustable tumor semi-ankle joint prosthesis can adapt to talus with different sizes and is high in universality; the time for waiting for prosthesis manufacturing of a patient can be reduced, and meanwhile, the prosthesis can be manufactured in batches, and the cost of a single piece can be reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic illustration of an explosive structure according to an embodiment of the invention;

FIG. 2 is a perspective view of the distal tibial prosthesis of the present invention;

FIG. 3 is a schematic perspective view of a lateral ankle prosthesis according to the invention;

FIG. 4 is a schematic perspective view of an ankle prosthesis according to the invention;

FIG. 5 is a schematic perspective view of a prosthetic cover plate according to the present invention;

FIG. 6 is a schematic view of the configuration of the lateral and medial ankle prostheses of the present invention adjusted to different angles;

reference numerals: 1-distal tibial prosthesis, 2-lateral malleolus prosthesis, 3-medial malleolus prosthesis, 4-prosthetic lamina, 10-assembly segment, 12-lateral malleolus joint, 121-first arc, 122-joint plane, 123-lug, 13-medial malleolus joint, 131-second arc, 132-second joint plane, 133-second lug, 14-lamina joint, 17-threaded hole, 21-lateral malleolus positioning hole, 22-lateral malleolus arc, 23-lateral malleolus arc, 31-medial malleolus positioning hole, 32-medial malleolus arc, 33-medial malleolus arc, 41-lamina groove, 42-lamina second groove, 14-base plane, 24-medial plane a, 34-medial plane B.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it should be noted that the indication of the orientation or the positional relationship is based on the orientation or the positional relationship shown in the drawings, or the orientation or the positional relationship which is usually placed when the product of the application is used, or the orientation or the positional relationship which is usually understood by those skilled in the art, or the orientation or the positional relationship which is usually placed when the product of the application is used, is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or the element which is indicated must have a specific orientation, be configured and operated in a specific orientation, and therefore, cannot be understood as the limitation of the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; may be directly connected or may be indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The wing type medial and lateral ankle adjustable tumor semi-ankle joint prosthesis comprises a tibia far-end prosthesis 1, a lateral ankle prosthesis 2, an medial ankle prosthesis 3 and a prosthesis cover plate 4, wherein the upper part of the tibia far-end prosthesis 1 is provided with an assembly section 10, and the assembly section 10 is in a cone frustum and is arranged in a tibia medullary cavity of a human body; one side of distal tibial prosthesis 1 is provided with apron connecting portion 14, the lower part outside that is close to the apron connecting portion of distal tibial prosthesis 1 is provided with outer ankle connecting portion 12, and the lower part inboard is provided with ankle connecting portion 13, outer ankle prosthesis 2, ankle prosthesis 3 are connected respectively at outer ankle connecting portion 12, ankle connecting portion 13, the relative distal tibial prosthesis 1's of outer ankle prosthesis 2, ankle prosthesis 3 angularly adjustable, the upper end of prosthesis apron 4 is fixed in apron connecting portion 14 through the screw, outer ankle prosthesis 2, ankle prosthesis 3 are covered respectively to the lower extreme both sides of prosthesis apron to concatenate outer ankle prosthesis 2/ankle prosthesis 3 through the screw and be fixed in outer ankle connecting portion 12/ankle connecting portion 13.

Specifically, the lateral ankle connecting portion 12 includes a first arc surface 121 and a connecting surface 122 perpendicular to the first arc surface 121, and the connecting surface 122 is provided with a threaded hole 17; the outer ankle archway 22 of outer ankle prosthesis 2 with the radius of first archway 121 is the same, outer ankle prosthesis 2 can be followed first archway 121 and rotated, and outer ankle prosthesis 2 corresponds screw hole 17 department and opens the outer ankle archway 23 that has a perfect understanding, and the axis of outer ankle archway 23 coincides with the axis of outer ankle archway 22, and the screw passes prosthesis apron 4, outer ankle archway 23 on the outer ankle prosthesis in proper order and connects on the screw hole 17 of outer ankle connecting portion. Furthermore, in order to achieve accurate positioning, a bump 123 is arranged on the connecting surface 122, a lateral malleolus positioning hole 21 matched with the bump 123 is arranged on the lateral surface of the lateral malleolus prosthesis 2, a cover plate groove 41 matched with the bump 123 is arranged at the corresponding position on the inner side of the prosthesis cover plate 4, and the bump 123 penetrates through the lateral malleolus prosthesis 2 and is connected into the cover plate groove 41 of the prosthesis cover plate 4; the lug 123, the lateral malleolus positioning hole 21 and the cover plate groove 41 can be cylindrical, preferably, the lug 123, the lateral malleolus positioning hole 21 and the cover plate groove 41 are in a regular polygonal prism shape, the axis of the lug 123 is overlapped with the axis of the first arc surface 121, and the axis of the lateral malleolus positioning hole 21 is overlapped with the axis of the lateral malleolus arc surface 22, so that the lateral malleolus prosthesis 2 can rotate relative to the tibia far-end prosthesis 1 in an angle-adjustable manner; the more the number of sides of the regular polygonal prism shape is, the smaller the adjustable unit angle is.

The medial malleolus connecting part 13 comprises a second arc surface 131 and a second connecting surface 132 perpendicular to the second arc surface 131, and a threaded hole 17 is formed in the second connecting surface 132; the ankle inner arc surface 32 of the ankle inner prosthesis 3 is the same as the radius of the second arc surface 131, the ankle inner prosthesis 3 can rotate along the second arc surface 131, the ankle inner arc hole 33 which runs through is formed in the corresponding threaded hole of the ankle inner prosthesis 3, the axis of the ankle inner arc hole 33 coincides with the axis of the ankle inner arc surface 32, and the screw sequentially penetrates through the prosthesis cover plate 4 and the ankle inner arc hole 33 on the ankle inner prosthesis to be connected to the threaded hole of the ankle inner connecting portion 13. Further, in order to achieve accurate positioning, a second bump 133 is arranged on the second connecting surface 132, a medial malleolus positioning hole 31 matched with the second bump 133 is arranged on the side surface of the medial malleolus prosthesis 3, a second cover plate groove 42 matched with the second bump 133 is arranged at a corresponding position on the inner side of the prosthesis cover plate 4, and the second bump 133 penetrates through the medial malleolus prosthesis 3 and is connected into the second cover plate groove 42 of the prosthesis cover plate 4; preferably, the second projection 133, the medial malleolus positioning hole 31 and the cover plate second groove 42 are in a regular polygonal prism shape, the axis of the second projection 133 coincides with the axis of the second arc surface 131, and the axis of the medial malleolus positioning hole 31 coincides with the axis of the medial malleolus arc surface, so that the medial malleolus prosthesis 3 can rotate in an angle-adjustable manner relative to the tibial distal prosthesis 1.

Same shin bone distal end prosthesis 1 and false body apron 4, outer ankle prosthesis 2 and ankle prosthesis 3 can be relative to shin bone distal end prosthesis 1 arbitrary angle of adjustment, if adjust to

outer ankle prosthesis

2A, 2B that figure 4 shows,

ankle prosthesis

3A, 3B position to the realization matches the talus of equidimension not, reaches the commonality.

The lateral walls of the lateral ankle prosthesis 2 and the medial ankle prosthesis 3 are also provided with a plurality of through holes, the through holes of the lateral ankle prosthesis 2 are parallel to the connecting surface 122, and the through holes of the medial ankle prosthesis 3 are parallel to the second connecting surface 132. The through hole is used for fixing ligaments and/or tendons, reduces the operation difficulty and ensures the stability of prosthesis assembly.

Furthermore, the bottom surface 14 of the tibia far-end prosthesis 1, the inner side surface A24 of the lateral malleolus prosthesis 2 and the inner side surface B34 of the medial malleolus prosthesis 3 are all covered with high-molecular polyethylene layers, and the polyethylene layers can buffer impact of the prosthesis on the talus of a human body in the movement process and reduce abrasion of the prosthesis.

The wing type internal and external ankle adjustable tumor semi-ankle joint prosthesis has a simple monopolar structure, can reserve the talus of a patient to the greatest extent, and reduces the risks of infection and prosthesis loosening; the external ankle prosthesis and the internal ankle prosthesis can rotate relative to the tibia far-end prosthesis, are adjustable in angle, can adapt to talus bones of different sizes, are high in universality, and can reduce the time for waiting for prosthesis manufacturing and the cost for hospitalizing of a patient.

The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention.

Claims

1. Wing type internal and external ankle adjustable tumor semi-ankle joint prosthesis, which comprises a tibia far-end prosthesis (1), an external ankle prosthesis (2), an internal ankle prosthesis (3) and a prosthesis cover plate (4), wherein a cover plate connecting part (14) is arranged on one side of the tibia far-end prosthesis (1), an external ankle connecting part (12) is arranged on the outer side of the lower part of the tibia far-end prosthesis (1) close to the cover plate connecting part, an internal ankle connecting part (13) is arranged on the inner side of the lower part, the external ankle prosthesis (2) and the internal ankle prosthesis (3) are respectively connected to the external ankle connecting part (12) and the internal ankle connecting part (13), the upper end of the prosthesis cover plate (4) is fixed on the cover plate connecting part (14) through screws, the external ankle prosthesis (2) and the internal ankle prosthesis (3) are respectively covered on two sides of the lower end of the prosthesis cover plate (4), the external ankle side of the lower end of the prosthesis cover plate (4) is fixed on the external ankle prosthesis connecting part (12) through screws in series connection with the external ankle prosthesis (2), the ankle joint side in false body apron (4) lower extreme is concatenated ankle joint false body (3) through the screw and is fixed in ankle joint portion (13), its characterized in that: the external ankle prosthesis (2) and the internal ankle prosthesis (3) have adjustable angles relative to the tibia far-end prosthesis (1).

2. The winged medial-lateral ankle adjustable tumor semi-ankle prosthesis of claim 1, wherein: the lateral malleolus connecting part (12) comprises a first arc surface (121) and a connecting surface (122) perpendicular to the first arc surface (121), and a threaded hole (17) is formed in the connecting surface (122); the ankle outside artificial limb (2) the ankle outside arc surface (22) with the radius of first arc surface (121) is the same, first arc surface (121) can be followed in ankle outside artificial limb (2) and rotate, and corresponding screw hole (17) department in ankle outside artificial limb (2) opens and has ankle outside arc hole (23), and the axis of ankle outside arc hole (23) and the axis coincidence of ankle outside arc surface (22), the screw passes prosthetic apron (4), ankle outside artificial limb on the ankle outside artificial limb arc hole (23) connect on the screw hole (17) of ankle outside connecting portion in proper order.

3. The winged medial-lateral ankle adjustable tumor semi-ankle prosthesis of claim 2, wherein: be equipped with lug (123) on connecting face (122), the side of outer ankle prosthesis (2) be provided with outer ankle locating hole (21) of lug (123) looks adaptation, prosthesis apron (4) inboard corresponds the position and is provided with apron recess (41) with lug (123) looks adaptation, lug (123) pass outer ankle prosthesis (2) and connect in apron recess (41) of prosthesis apron (4), the axis of lug (123) coincides mutually with the axis of first arc surface (121), the axis of outer ankle locating hole (21) and the axis coincidence of outer ankle arc surface (22).

4. The winged medial-lateral ankle adjustable tumor semi-ankle prosthesis of claim 3, wherein: the convex block (123), the lateral malleolus positioning hole (21) and the cover plate groove (41) are in a regular polygonal prism shape.

5. The winged medial-lateral ankle adjustable tumor semi-ankle prosthesis according to claim 3, wherein: the lug (123), the lateral malleolus positioning hole (21) and the cover plate groove (41) are cylindrical.

6. The winged medial-lateral ankle adjustable tumor semi-ankle prosthesis of claim 1, wherein: the medial malleolus connecting part (13) comprises a second arc surface (131) and a second connecting surface (132) perpendicular to the second arc surface (131), and a threaded hole is formed in the second connecting surface (132); the ankle joint is characterized in that an ankle joint circular arc surface (32) of the ankle joint prosthesis (3) is identical to the radius of the second circular arc surface (131), the ankle joint prosthesis (3) can rotate along the second circular arc surface (131), an ankle joint arc hole (33) is formed in the corresponding threaded hole of the ankle joint prosthesis (3), the axis of the ankle joint arc hole (33) coincides with the axis of the ankle joint circular arc surface (32), and a screw sequentially penetrates through the prosthesis cover plate (4) and the ankle joint arc hole (33) in the ankle joint prosthesis to be connected to a threaded hole of the ankle joint part (13).

7. The winged medial-lateral ankle adjustable tumor semi-ankle prosthesis of claim 6, wherein: the ankle joint prosthesis is characterized in that a second convex block (133) is arranged on the second connecting surface (132), a medial ankle positioning hole (31) matched with the second convex block (133) is formed in the side surface of the medial ankle prosthesis (3), a cover plate second groove (42) matched with the second convex block (133) is formed in the corresponding position of the inner side of the prosthesis cover plate (4), the second convex block (133) penetrates through the medial ankle prosthesis (3) to be connected into the cover plate second groove (42) of the prosthesis cover plate (4), the axis of the second convex block (133) is coincided with the axis of the second arc surface (131), and the axis of the medial ankle positioning hole (31) is coincided with the axis of the medial ankle arc surface (32).

8. The winged medial-lateral ankle adjustable tumor semi-ankle prosthesis according to claim 7, wherein: the second lug (133), the medial malleolus positioning hole (31) and the cover plate second groove (42) are in a regular polygonal prism shape.

9. The winged medial-lateral ankle adjustable tumor semi-ankle prosthesis according to any one of claims 1 to 8, wherein: a plurality of through holes are formed in the external ankle prosthesis (2) and the internal ankle prosthesis (3), the through holes in the external ankle prosthesis (2) are parallel to the connecting surface (122), and the through holes in the internal ankle prosthesis (3) are parallel to the second connecting surface (132).

10. The winged medial-lateral ankle adjustable tumor semi-ankle prosthesis according to any one of claims 1-8, wherein: the upper part of the tibia far-end prosthesis (1) is provided with an assembly section (10), and the assembly section (10) is in a cone frustum shape.