CN219439566U - Non-bone cement fixed elbow joint prosthesis - Google Patents
Non-bone cement fixed elbow joint prosthesis Download PDFInfo
- Publication number
- CN219439566U CN219439566U CN202320330897.9U CN202320330897U CN219439566U CN 219439566 U CN219439566 U CN 219439566U CN 202320330897 U CN202320330897 U CN 202320330897U CN 219439566 U CN219439566 U CN 219439566U
- Authority
- CN
- China
- Prior art keywords
- segment
- ulna
- prosthesis
- screw hole
- humeral
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Links
- 210000002310 elbow joint Anatomy 0.000 title claims abstract description 30
- 239000002639 bone cement Substances 0.000 title claims abstract description 14
- 210000000623 ulna Anatomy 0.000 claims abstract description 51
- 210000002758 humerus Anatomy 0.000 claims abstract description 40
- 210000003275 diaphysis Anatomy 0.000 claims description 6
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 2
- 239000004568 cement Substances 0.000 claims 9
- 238000001356 surgical procedure Methods 0.000 abstract description 4
- 230000013011 mating Effects 0.000 abstract 1
- 210000000988 bone and bone Anatomy 0.000 description 3
- 208000010392 Bone Fractures Diseases 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 201000008482 osteoarthritis Diseases 0.000 description 2
- 206010039073 rheumatoid arthritis Diseases 0.000 description 2
- 208000024779 Comminuted Fractures Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 208000001132 Osteoporosis Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001575 pathological effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
Landscapes
- Prostheses (AREA)
Abstract
The utility model provides a non-bone cement fixed elbow joint prosthesis, which comprises an ulna segment and a humerus segment which are sequentially arranged and respectively inserted into a humeral marrow cavity and an ulna marrow cavity, wherein the ulna segment and the humerus segment are rotatably connected together through a prosthesis joint part; the ulna segment and the humerus segment are provided with a plurality of screw holes in different directions, and also comprise matched screws. Each mating screw passes through the screw hole and through the two layers of cortex of the humeral shaft and the ulna shaft, thereby achieving a firm fixation of the prosthesis with the humerus and the ulna in multiple planes. The elbow joint prosthesis is fixed in the marrow cavity of the humerus and the marrow cavity of the ulna by utilizing a plurality of screws, and bone cement does not need to be injected into the marrow cavity, so that the elbow joint prosthesis is a biological fixing mode with relatively small destructiveness. The prosthesis is fixed by the screw, and when the prosthesis is loosened or infected, the prosthesis is easy to take out from the intramedullary cavity, so that the secondary revision surgery is convenient to perform.
Description
Technical Field
The utility model relates to the technical field of elbow joint replacement, in particular to an elbow joint prosthesis which does not need to be fixed by bone cement.
Background
Human elbow joints may be damaged by a variety of pathological conditions, such as rheumatoid arthritis, osteoarthritis, bone fractures, and the like. In most cases, the damage to the elbow joint may be treated by conservative treatment, arthroscopic surgery, or relatively simple internal fixation surgery, etc. However, if severe trauma such as severe rheumatoid arthritis, severe osteoarthritis, or a distal humeral comminuted fracture with severe osteoporosis, elbow joint replacement is required to remove damaged or diseased bone tissue of the elbow joint and replace it with a metal prosthesis (implant) to thereby maximally preserve the function of the patient's elbow joint while reconstructing the bony structure of the elbow joint. At present, the prosthesis for elbow joint replacement is fixed by bone cement, and the fixing effect is reliable. However, when serious complications such as infection after replacement, fracture around the prosthesis or loosening occur, it is necessary to take out the bone cement in the prosthesis and the intramedullary canal and replace and fix a new prosthesis. However, the bone cement is very difficult to take out, and the bone cement is slightly careless, so that secondary damage and even loss of bone in the medullary cavity can be caused, thereby causing difficulty in the implantation and fixation of a new prosthesis.
Disclosure of Invention
The utility model aims to provide a non-bone cement fixed elbow joint prosthesis, which solves the technical problems that in the prior art, the bone cement fixed elbow joint prosthesis is difficult to take out, bone damage or defect of a marrow cavity is easy to cause during taking out, and then a new prosthesis is difficult to replace and fix.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the utility model provides a non-bone cement fixed elbow joint prosthesis, which comprises an ulna segment and a humerus segment which are sequentially arranged and respectively inserted into a humerus marrow cavity and an ulna marrow cavity, wherein the ulna segment and the humerus segment are rotatably connected together through a prosthesis joint part; the ulna segment and the humerus segment are provided with a plurality of screw holes in different directions, and the screw also comprises matched screws ， Each matched screw passes through the screw hole and penetrates through the two layers of cortex of the diaphysis of the humerus and the ulna, so that the prosthesis is firmly fixed with the humerus and the ulna on a plurality of planes.
In some embodiments, the number of screw holes provided on the ulna segment is at least three, an ulna-side first screw hole, an ulna-side second screw hole, and an ulna-side third screw hole, respectively.
In some embodiments, the ulnar side first screw hole and the ulnar side second screw hole are both located at the distal end of the ulna segment and are disposed at a 90 degree angle.
In some embodiments, the ulnar-side third screw hole is disposed obliquely to an end of the ulna segment proximate the prosthetic joint.
In some embodiments, the ulnar side third screw hole is obliquely disposed.
In some embodiments, the number of screw holes provided on the humeral segment is at least three, a first humeral screw hole, a second humeral screw hole, and a third humeral screw hole, respectively.
In some embodiments, the humeral side second screw hole and the humeral side third screw hole are both disposed at the distal end of the humeral segment at a 90 degree included angle.
In some embodiments, the humeral side third screw hole consists of two screw holes that are coincident in direction: the stem part of the prosthesis handle at the side of the oblique humerus is obliquely penetrated, the collar part at the diaphysis of the oblique humerus, namely the part with radian near the joint part, and the corresponding matched screw is fixed through two holes and obliquely penetrated through the front and back layers of cortex at the far end of the marrow cavity of the humerus.
In some embodiments, the humeral side third screw hole is obliquely disposed.
In some embodiments, the ulna segment and humeral segment surfaces are reverse serrated non-smooth surfaces, or alternatively, the ulna segment and humeral segment surfaces are tantalum metal coatings with a bone-in Liang Fangsheng structure.
Compared with the prior art, the utility model has the following beneficial effects:
the non-bone cement fixed elbow joint prosthesis provided by the utility model is fixed in the humeral cavity and the ulna cavity by using the screw, is a small-destructive fixing structure, is fixed by using the screw, is easy to take out when the prosthesis fails to be infected, is convenient to perform secondary repair operation, and is simple in operation.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic illustration of a non-cement-fixed elbow prosthesis according to one embodiment of the present utility model.
1, ulna segment; 2. humeral segment; 3. a prosthetic joint; 4. an ulna-side first screw hole; 5. ulna-side second screw holes; 6. an ulna-side third screw hole; 7. a humeral side first screw hole; 8. a humeral side second screw hole; 9. a third screw hole on the humerus side.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, based on the examples herein, which are within the scope of the utility model as defined by the claims, will be within the scope of the utility model as defined by the claims.
As shown in fig. 1, the present utility model provides a non-cement-fixed elbow joint prosthesis comprising an ulna segment 1 and a humerus segment 2 which are sequentially disposed and inserted into a humeral cavity and an ulna cavity, respectively, the ulna segment 1 and the humerus segment 2 being rotatably connected together by a prosthesis coupling 3; the ulna segment 1 and the humerus segment 2 are provided with a plurality of screw holes in different directions, and the device further comprises matched screws, and each matched screw passes through the screw holes and penetrates through the two layers of cortex of the diaphysis of the humerus and the ulna, so that the prosthesis is firmly fixed with the humerus and the ulna on a plurality of planes.
The elbow joint prosthesis provided by the utility model is fixed in the humeral marrow cavity and the ulna marrow cavity by using the screw, is a small-destructive fixing structure, is fixed by using the screw, is easy to take out when the prosthesis fails to infect, is convenient to perform secondary revision surgery, and is simple in operation.
Specifically, in the present embodiment, the number of screw holes provided in the ulna segment 1 is plural, and at least three screw holes are respectively an ulna side first screw hole 4, an ulna side second screw hole 5, and an ulna side third screw hole 6.
The first screw hole 4 on the ulna side and the second screw hole 5 on the ulna side are positioned at the tail end of the ulna segment 1, and the two are arranged at an included angle of 90 degrees, however, other angles can be also adopted; the ulna-side third screw hole 6 is provided obliquely at an end of the ulna segment 1 near the prosthesis combining part 3.
Further, the inclination direction of the third screw hole 6 on the ulna side is inclined to the left, that is, the inclination direction of the third screw hole 6 on the ulna side is matched with the shape direction of the ulna segment 1, and is parallel to the structure trend of the corresponding position of the ulna segment 1 as much as possible.
As shown in fig. 1, the humeral segment 2 has a plurality of, at least three, first, second, and third humeral screw holes 7, 8, and 9, respectively.
Specifically, the second screw hole 8 on the humerus side and the third screw hole 9 on the humerus side are both arranged at the tail end of the humerus segment 2, and the two are arranged at an included angle of 90 degrees, however, other angles can be also adopted; in some embodiments, the humeral side third screw hole 9 consists of two screw holes that are coincident in direction: the stem part of the prosthesis handle at the side of the oblique humerus is obliquely penetrated, the collar part at the diaphysis of the oblique humerus, namely the part with radian near the joint part, and the corresponding matched screw is fixed through two holes and obliquely penetrated through the front and back layers of cortex at the far end of the marrow cavity of the humerus. In some embodiments, the oblique direction of the humeral side third screw hole 9 is oblique to the right. That is, the inclination direction of the third screw hole 9 on the humerus side is adapted to the external shape direction of the humerus segment 2, and is parallel to the structure direction of the corresponding position of the humerus segment 2 as much as possible.
In order to increase the resistance to extraction and stability of the prosthesis after implantation, in this embodiment, the ulna segment 1 and humeral segment 2 surfaces are inverted serrated uneven surfaces. The reverse direction referred to herein refers to the direction opposite to the direction of insertion of the prosthesis. Alternatively, the ulna segment 1 and humerus segment 2 are coated with tantalum metal having a bone-in Liang Fangsheng structure.
The prosthesis according to the utility model is screwed on the humeral side, that is to say the elbow joint prosthesis is divided into two parts, one being the humeral segment 2 inserted into the intramedullary canal of the humerus and the other being the ulna segment 1 inserted into the intramedullary canal of the ulna, and then the fitting is performed at the prosthetic joint 3, on the humeral side of the humerus a multi-planar, biplane screw fixation is performed by means of two to three screws, and on the ulna side a multi-planar, biplane interlocking fixation is performed by means of two to three screws as well.
Here, first, the "inward" is a direction toward the center of the accommodating space, and the "outward" is a direction away from the center of the accommodating space.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in fig. 1 are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.
Claims (10)
1. An elbow joint prosthesis fixed by non-bone cement is characterized by comprising an ulna segment and a humerus segment which are sequentially arranged and respectively inserted into a humeral marrow cavity and an ulna marrow cavity, wherein the ulna segment and the humerus segment are rotatably connected together through a prosthesis joint part; the ulna segment and the humerus segment are provided with a plurality of screw holes in different directions, and the device further comprises matched screws, and each matched screw passes through the screw holes and penetrates through the two layers of cortex of the diaphysis of the humerus and the ulna stem, so that the prosthesis is firmly fixed with the humerus and the ulna on a plurality of planes.
2. The non-cement fixed elbow joint prosthesis of claim 1, wherein the number of screw holes provided in the ulna segment is at least three, an ulna-side first screw hole, an ulna-side second screw hole, and an ulna-side third screw hole, respectively.
3. The non-cement fixed elbow joint prosthesis of claim 2, wherein the ulnar side first screw hole and the ulnar side second screw hole are both located at the distal end of the ulnar segment.
4. The non-cement fixed elbow joint prosthesis of claim 2, wherein the ulnar side third screw hole is obliquely disposed at an end of the ulnar segment adjacent the prosthetic joint.
5. The non-cement fixed elbow joint prosthesis of claim 4, wherein the ulnar side third screw hole is obliquely disposed.
6. The non-cement fixed elbow joint prosthesis of claim 1, wherein the number of screw holes provided in the humeral segment is at least three, a first humeral screw hole, a second humeral screw hole, and a third humeral screw hole.
7. The non-cement fixed elbow joint prosthesis of claim 6, wherein the humeral side second screw hole and the humeral side third screw hole are both disposed at the distal end of the humeral segment.
8. The non-cement fixed elbow prosthesis of claim 6, wherein the humeral side third screw hole consists of two screw holes that are in a uniform direction: the main part of the prosthesis handle at the side of the humerus is obliquely penetrated, the collar part of the diaphysis of the humerus is obliquely penetrated, and the corresponding matched screw is fixed by two holes and obliquely penetrated through the front and back layers of cortex at the far end of the marrow cavity of the humerus.
9. The non-cement fixed elbow joint prosthesis of claim 8, wherein the humeral side third screw hole is obliquely disposed.
10. The non-cement fixed elbow joint prosthesis of claim 1, wherein the ulnar and humeral segment surfaces are reverse serrated non-smooth surfaces or the ulnar and humeral segment surfaces are tantalum metal coatings with a bone-in Liang Fangsheng structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320330897.9U CN219439566U (en) | 2023-02-28 | 2023-02-28 | Non-bone cement fixed elbow joint prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320330897.9U CN219439566U (en) | 2023-02-28 | 2023-02-28 | Non-bone cement fixed elbow joint prosthesis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219439566U true CN219439566U (en) | 2023-08-01 |
Family
ID=87415048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320330897.9U Active CN219439566U (en) | 2023-02-28 | 2023-02-28 | Non-bone cement fixed elbow joint prosthesis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219439566U (en) |
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2023
- 2023-02-28 CN CN202320330897.9U patent/CN219439566U/en active Active
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