CN118490424B - A tumor-type tibial prosthesis - Google Patents

Abstract

The invention provides a tumor type tibial prosthesis, which comprises: an end cover which is annular, the inner wall is provided with an internal thread; the tile body is provided with a telescopic hole in the axial direction, an ejection hole in the radial direction and an assembly hole at the bottom; the telescopic piece is provided with a traction part and an ejection part, is movably arranged in the telescopic hole, and is also provided with a traction hole at the bottom; the ejector body is provided with an arc body abutting telescopic piece, an hourglass body abutting arc body, an arc body abutting hourglass body and a wedge body abutting arc body; the cable is provided with two at least, and the cable both ends are equipped with cylindricality pull head, and the pull head passes the pilot hole, installs in the pull hole. By applying the technical scheme of the invention, the telescopic piece can be pulled upwards by rotating the mounting end cover, the ejection body is ejected inwards along the ejection hole and is tightly abutted with the tibia of the human body, meanwhile, the cable is tightened, and the tile body is tightened towards the tibia side, so that stable mounting of the tibial prosthesis is realized.

Description

A tumor-type tibial prosthesis

Technical Field

The present invention relates to the technical field of medical devices, and in particular to a tumor-type tibial prosthesis.

Background Art

The knee joint is one of the most common sites for primary malignant bone tumors and bone metastasis. In the past 30 years, tumor resection and tumor-type artificial prosthesis reconstruction have become the main methods for treating malignant bone tumors around the knee joint due to their obvious advantages. However, tumor-type prostheses have many problems such as infection, loosening, and fracture, which in turn lead to secondary or multiple revision surgeries, or even amputation, threatening the patient's joint function and quality of life.

Traditional tumor-type tibial prostheses rely on an intramedullary rod that penetrates deep into the tibial medullary cavity to achieve fixation. When less healthy area of the tibia is retained and is subjected to a larger bending moment, longitudinal tibial cracking and fractures are easily caused at the osteotomy site.

Summary of the invention

In view of the above problems, the present invention proposes a tumor-type tibial prosthesis, which can achieve stable installation of the tibial prosthesis by cooperating with the traditional tumor-type tibial prosthesis.

The present invention provides a tumor-type tibial prosthesis to solve the problem of easy loosening of tibial prosthesis in the related art.

The present invention provides a tumor-type tibial prosthesis, comprising: an end cover, which is annular and has an inner thread on its inner wall; a tile body, which is axially provided with a telescopic hole, the telescopic hole is connected to the upper surface, radially provided with an ejection hole, the ejection hole is connected to the inner arc surface, and the bottom is provided with an assembly hole, the assembly hole is connected to the outer arc surface, the lower surface, and the side plane; an expansion piece, which is provided with a pulling part and an ejection part, and is movably arranged in the expansion hole, and the bottom of the expansion piece is also provided with a pulling hole, the pulling hole is connected to the lower surface of the expansion piece; an ejection body, which is provided with a bow-shaped body abutting the expansion piece, an hourglass body abutting the bow-shaped body, an arc-shaped body abutting the hourglass body, and a wedge-shaped body abutting the arc-shaped body; at least two cables are provided, and columnar pulling heads are provided at both ends of the cables, and the pulling heads pass through the assembly holes and are installed in the pulling holes.

Furthermore, at least two tile bodies are provided and are evenly distributed below the end cover.

Furthermore, at least two expansion pieces are provided, and at least one expansion piece is provided in each tile body.

Furthermore, the pulling portion of the expansion piece is provided with an external thread, and the external threads of a plurality of expansion pieces can be simultaneously assembled on the internal thread of the same end cover.

Furthermore, protrusions are arranged at intervals on the inner side of the ejection portion of the expansion piece, the protrusions are evenly distributed, and the upper surfaces of the protrusions are provided with inclined surfaces.

Furthermore, at least two ejection bodies are provided, and each expansion sheet abuts against at least one ejection body.

Furthermore, one side of the arched body abuts the telescopic piece, and the other side is provided with an arc-shaped first slide rail abutting the hourglass body; one side of the hourglass body is provided with an arc-shaped first slide groove abutting the arched body, and the other side is provided with an arc-shaped second slide groove abutting the arc-shaped body; one side of the arc-shaped body is provided with an arc-shaped second slide rail abutting the hourglass body, and the other side is provided with an arc-shaped third slide groove abutting the wedge-shaped body, and the axis of the second slide rail is perpendicular to the axis of the third slide groove but do not intersect; one side of the wedge-shaped body is provided with an arc-shaped third slide rail abutting the arc-shaped body, and the other side is a wedge-shaped surface, which fits the inner surface of the tile body and abuts the human tibia.

Further, the first slide rail is slidably disposed in the first slide groove, the second slide rail is slidably disposed in the second slide groove, and the third slide rail is slidably disposed in the third slide groove.

By applying the technical solution of the present invention, the expansion piece can be pulled upward by rotating the installation end cover, and the ejection body is ejected inward along the ejection hole to closely abut against the human tibia. At the same time, the cable is tightened and the tile body is tightened toward the tibia side, thereby achieving stable installation of the tibial prosthesis.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

FIG1 shows an exploded schematic diagram of a tumor-type tibial prosthesis provided according to an embodiment of the present invention;

FIG2 shows a schematic structural diagram of the tile body in FIG1 ;

FIG3 shows a schematic structural diagram of the telescopic sheet in FIG1 ;

FIG4 shows a schematic structural diagram of the toxoplasm in FIG1 ;

FIG5 shows a schematic structural diagram of the hourglass body in FIG1 ;

FIG6 shows a schematic structural diagram of the arc-shaped body in FIG1 ;

FIG7 shows a schematic structural diagram of the wedge-shaped body in FIG1 ;

FIG. 8 shows a schematic structural diagram of the cable in FIG. 1 .

The above drawings include the following reference numerals:

10. End cover; 11. Internal thread;

20. Tile body; 21. Telescopic hole; 22. Ejection hole; 23. Assembly hole;

30. expansion piece; 31. pulling part; 311. external thread; 32. ejection part; 321. protrusion; 322. inclined surface; 33. pulling hole;

40, ejector body; 41, arched body; 411, first slide rail; 42, hourglass body; 421, first slide groove; 422, second slide groove; 43, arc-shaped body; 431, second slide rail; 432, third slide groove; 44, wedge-shaped body; 441, third slide rail; 442, wedge-shaped surface;

50. Cable; 51. Pull head.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

As shown in FIGS. 1 to 8, the present invention provides a tumor-type tibial prosthesis, comprising: an end cap 10, which is annular and has an inner thread 11 on its inner wall; a tile body 20, which has a telescopic hole 21 in the axial direction, the telescopic hole 21 is connected to the upper surface, and has an ejection hole 22 in the radial direction, the ejection hole 22 is connected to the inner arc surface, and a mounting hole 23 is provided at the bottom, the mounting hole 23 is connected to the outer arc surface, the lower surface, and the side plane; a telescopic sheet 30, which has a pulling portion 31 and an ejection portion 32, and is movably arranged on the telescopic surface. In the hole 21, a pulling hole 33 is also provided at the bottom of the expansion piece 30, and the pulling hole 33 is connected to the lower surface of the expansion piece 30; the ejection body 40 is provided with a bow-shaped body 41 abutting the expansion piece 30, an hourglass body 42 abutting the bow-shaped body 41, an arc-shaped body 43 abutting the hourglass body 42, and a wedge-shaped body 44 abutting the arc-shaped body 43; at least two cables 50 are provided, and cylindrical pulling heads 51 are provided at both ends of the cables 50, and the pulling heads 51 pass through the assembly hole 23 and are installed in the pulling hole 33.

By applying the technical solution of the present invention, the expansion piece 30 can be pulled upward by rotating the installation end cover 10, and the ejection body 40 is ejected inward along the ejection hole 22 to closely abut against the human tibia. At the same time, the cable 50 is tightened and the tile body 20 is tightened toward the tibia side, thereby achieving stable installation of the tibial prosthesis.

As shown in FIG. 1 , at least two tile bodies 20 are provided and are evenly distributed below the end cover 10 .

As shown in FIG. 1 , at least two expansion pieces 30 are provided, and at least one expansion piece 30 is provided in each tile body 20 .

As shown in FIG. 1 and FIG. 3 , the pulling portion 31 of the expansion piece 30 is provided with an external thread 311 , and the external threads 311 of a plurality of expansion pieces 30 can be simultaneously assembled on the internal thread 11 of the same end cover 10 .

In particular, protrusions 321 are arranged at intervals inside the protruding portion 32 of the expansion piece 30 . The protrusions 321 are evenly distributed, and an inclined surface 322 is arranged on the upper surface of the protrusions 321 .

As shown in FIG. 1 , at least two ejector bodies 40 are provided, and each expansion piece 30 abuts against at least one ejector body 40 .

As shown in Figures 4 to 7, one side of the arched body 41 abuts the telescopic piece 30, and the other side is provided with an arc-shaped first slide rail 411 to abut the hourglass body 42; one side of the hourglass body 42 is provided with an arc-shaped first slide groove 421 to abut the arched body 41, and the other side is provided with an arc-shaped second slide groove 422 to abut the arc-shaped body 43; one side of the arc-shaped body 43 is provided with an arc-shaped second slide rail 431 to abut the hourglass body 42, and the other side is provided with an arc-shaped third slide groove 432 to abut the wedge-shaped body 44, and the axis of the second slide rail 431 is perpendicular to the axis of the third slide groove 432 but do not intersect; one side of the wedge-shaped body 44 is provided with an arc-shaped third slide rail 441 to abut the arc-shaped body 43, and the other side is a wedge-shaped surface 442, which fits the inner surface of the tile body 20 to abut the human tibia.

In actual use, the first slide rail 411 is slidably disposed in the first slide groove 421 , the second slide rail 431 is slidably disposed in the second slide groove 422 , and the third slide rail 441 is slidably disposed in the third slide groove 432 .

It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and/or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and/or combinations thereof.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (8)

1. A tumor-type tibial prosthesis, comprising:

an end cover (10) which is annular, and the inner wall of which is provided with an internal thread (11);

The tile body (20) is axially provided with a telescopic hole (21), the telescopic hole (21) is communicated with the upper surface, the radial direction is provided with an ejection hole (22), the ejection hole (22) is communicated with the intrados, the bottom is provided with an assembly hole (23), and the assembly hole (23) is communicated with the extrados, the lower surface and the side plane;

The telescopic piece (30) is provided with a traction part (31) and an ejection part (32), and is movably arranged in the telescopic hole (21), the bottom of the telescopic piece (30) is also provided with a traction hole (33), and the traction hole (33) is communicated with the lower surface of the telescopic piece (30);

An ejector body (40) provided with an arc body (41) abutting the telescopic sheet (30), an hourglass body (42) abutting the arc body (41), an arc body (43) abutting the hourglass body (42), and a wedge body (44) abutting the arc body (43);

The cable (50) is provided with two at least, and cable (50) both ends are equipped with cylindricality pull head (51), and pull head (51) pass mounting hole (23), install in pull hole (33).

2. The tibial prosthesis of claim 1, wherein said tile body (20) is provided with at least two, evenly distributed under the end cap (10).

3. The tibial prosthesis of claim 1, wherein said expansion tabs (30) are provided in at least two, at least one expansion tab (30) being provided in each tile body (20).

4. The tibial prosthesis of claim 1, wherein the pulling part (31) of the telescopic piece (30) is provided with external threads (311), and the external threads (311) of a plurality of telescopic pieces (30) can be simultaneously assembled with the internal threads (11) of the same end cap (10).

5. The tumor type tibial prosthesis of claim 1, wherein protrusions (321) are arranged at intervals on the inner side of the ejection part (32) of the telescopic sheet (30), the protrusions (321) are uniformly distributed, and an inclined plane (322) is arranged on the upper surface of each protrusion (321).

6. The tibial prosthesis of claim 1, wherein said ejection body (40) is provided in at least two, each expansion tab (30) abutting at least one ejection body (40).

7. The tumor type tibial prosthesis according to claim 1, wherein one side of the arcuate body (41) is abutted against the telescopic piece (30), and the other side is provided with an arc-shaped first sliding rail (411) abutted against the hourglass body (42); one side of the hourglass body (42) is provided with an arc-shaped first sliding groove (421) which is abutted against the arcuate body (41), and the other side is provided with an arc-shaped second sliding groove (422) which is abutted against the arcuate body (43); one side of the arc-shaped body (43) is provided with an arc-shaped second sliding rail (431) which is abutted against the hourglass body (42), the other side is provided with an arc-shaped third sliding groove (432) which is abutted against the wedge-shaped body (44), and the axis of the second sliding rail (431) is perpendicular to but not intersected with the axis of the third sliding groove (432); one side of the wedge body (44) is provided with an arc-shaped third sliding rail (441) which is abutted against the arc body (43), and the other side is provided with a wedge surface (442) which is abutted against the inner surface of the tile body (20) to be abutted against the tibia of a human body.

8. The tibial prosthesis of claim 7, wherein said first sliding track (411) is slidably disposed within a first sliding track (421), said second sliding track (431) is slidably disposed within a second sliding track (422), and said third sliding track (441) is slidably disposed within a third sliding track (432).