CN107550605B - Femoral prosthesis - Google Patents
Femoral prosthesis Download PDFInfo
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- CN107550605B CN107550605B CN201710700435.0A CN201710700435A CN107550605B CN 107550605 B CN107550605 B CN 107550605B CN 201710700435 A CN201710700435 A CN 201710700435A CN 107550605 B CN107550605 B CN 107550605B
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- block
- bonding surface
- femoral prosthesis
- handle body
- adjusting
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- 230000007704 transition Effects 0.000 claims description 21
- 238000005452 bending Methods 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 description 10
- 210000004872 soft tissue Anatomy 0.000 description 8
- 125000006850 spacer group Chemical group 0.000 description 6
- 238000001356 surgical procedure Methods 0.000 description 5
- 230000008439 repair process Effects 0.000 description 3
- 210000000689 upper leg Anatomy 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000002271 resection Methods 0.000 description 2
- 208000006820 Arthralgia Diseases 0.000 description 1
- 238000011882 arthroplasty Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011540 hip replacement Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000008407 joint function Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035479 physiological effects, processes and functions Effects 0.000 description 1
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- Prostheses (AREA)
Abstract
The invention provides a femoral prosthesis, which comprises a handle body far end and a handle body near end, wherein the handle body near end is detachably arranged on the handle body far end, and the femoral prosthesis further comprises: the adjusting cushion block is arranged between the distal end of the handle body and the proximal end of the handle body; the handle body far end is provided with a first binding face and a second binding face intersected with the first binding face, the handle body near end is provided with a third binding face and a fourth binding face which are respectively corresponding to the first binding face and the second binding face, and the adjusting cushion block is detachably arranged between the first binding face and the third binding face and/or between the second binding face and the fourth binding face. The femoral prosthesis solves the problem that the femoral stem prosthesis with good fixation needs to be completely taken out when the femoral prosthesis is overhauled in the prior art.
Description
Technical Field
The invention relates to the field of artificial prostheses, in particular to a femoral prosthesis.
Background
Artificial hip arthroplasty (THA) is one of the most successful surgical procedures in the 20 th century, and is effective in eliminating joint pain, reconstructing joint function, and correcting deformities, thereby improving the quality of life of patients. As the number of global hip replacements increases, hip revision surgery has also tended to be increasingly performed, with the greatest rates of aseptic loosening and infection among all revision surgeries, which has been the focus of attention of physicians.
For the form of medullary cavity side loosening, there are mainly three types:
(1) The femoral stem is completely loosened;
(2) The femoral stem is not completely loosened;
(3) The femoral stem is not loose but must be removed.
For the third form, in order to achieve soft tissue balance of the patient after revision, the non-loose femoral stem is not required to be taken out, and the operation is heavy in workload, time-consuming, high in risk, and even causes fracture of the femoral stem of the patient.
At present, an effective method for solving the problem is not available in the market, even the split femoral stem cannot be well matched with the physiological eccentricity and neck height of a patient after repair, the real soft tissue balance cannot be achieved, and the service life of the repair prosthesis is reduced.
Disclosure of Invention
The invention mainly aims to provide a femoral prosthesis, which aims to solve the problem that a well-fixed femoral stem prosthesis needs to be completely taken out when the femoral prosthesis is overhauled in the prior art.
In order to achieve the above object, the present invention provides a femoral prosthesis comprising a distal stem end and a proximal stem end, the proximal stem end being detachably disposed on the distal stem end, the femoral prosthesis further comprising: the adjusting cushion block is arranged between the distal end of the handle body and the proximal end of the handle body; the handle body far end is provided with a first binding face and a second binding face intersected with the first binding face, the handle body near end is provided with a third binding face and a fourth binding face which are respectively corresponding to the first binding face and the second binding face, and the adjusting cushion block is detachably arranged between the first binding face and the third binding face and/or between the second binding face and the fourth binding face.
Further, the adjusting cushion block includes: the first regulating block is arranged between the first fitting surface and the third fitting surface.
Further, the center line of the distal end of the shank is perpendicular to the first abutment surface.
Further, the adjusting cushion block includes: the second adjusting block is arranged between the second attaching surface and the fourth attaching surface.
Further, the center line of the distal end of the shank is inclined to the second abutment surface.
Further, the adjusting cushion block is a bending plate, and the bending plate is provided with a first adjusting block and a second adjusting block; wherein, first regulating block sets up between first faying face and third faying face, and the second regulating block sets up between second faying face and fourth faying face.
Further, the bending plate is provided with a transition block, a first end of the transition block is connected with the first adjusting block, and a second end of the transition block is connected with the second adjusting block.
Further, the first adjusting block, the transition block and the second adjusting block are integrally formed.
Further, a connecting hole is formed in the distal end of the handle body, a connecting portion matched with the connecting hole is arranged on the proximal end of the handle body, and the connecting portion is inserted into the connecting hole.
Further, a first locking hole for the fastener to pass through is formed in the distal end of the handle body, a second locking hole for the fastener to pass through is formed in the proximal end of the handle body, and the first locking hole and the second locking hole are arranged opposite to each other, so that the fastener is arranged in the second locking hole and the first locking hole in a penetrating mode.
The femoral prosthesis can be quickly disassembled and assembled through the distal end of the handle body, the proximal end of the handle body and the adjusting cushion block, wherein the adjusting cushion block is arranged between the distal end of the handle body and the proximal end of the handle body. When repairing the femoral prosthesis, according to the eccentricity of physiology and neck height requirement after patient repair, corresponding adjusting cushion blocks are selected for use, when only the deviation distance needs to be adjusted, the adjusting cushion blocks are arranged between the second attaching surface and the fourth attaching surface, the first attaching surface and the third attaching surface are attached to each other, or when only the neck height needs to be adjusted, the adjusting cushion blocks are arranged between the first attaching surface and the third attaching surface, the second attaching surface and the fourth attaching surface are attached to each other, if the eccentricity and the neck height are required to be adjusted simultaneously, proper adjusting cushion blocks are selected for use, and the adjusting cushion blocks are arranged between the second attaching surface and the fourth attaching surface and between the first attaching surface and the third attaching surface.
Compared with the femoral prosthesis in the prior art, in order to achieve soft tissue balance of a patient after revision, an loosened femoral stem is required to be taken out, the operation workload is large, time is long, risks are high, even the femoral stem of the patient is fractured, even the split femoral stem cannot be well matched with physiological eccentricity and neck height of the patient after revision, the real soft tissue balance cannot be achieved, and the service life of the revision prosthesis is shortened.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 shows a schematic structural view of a first embodiment of a femoral prosthesis according to the invention;
fig. 2 shows a schematic exploded view of an embodiment of a femoral prosthesis according to the present invention;
fig. 3 shows a schematic structural view of a second embodiment of a femoral prosthesis according to the invention; and
fig. 4 shows a schematic structural view of an adjustment block of a femoral prosthesis according to the present invention.
Wherein the above figures include the following reference numerals:
10. a distal end of the handle body; 11. a first bonding surface; 12. a second bonding surface; 13. a connection hole; 14. a first locking hole; 20. a proximal end of the handle body; 21. a connection part; 22. a second locking hole; 30. adjusting the cushion block; 31. a first adjustment block; 32. a second adjustment block; 33. and a transition block.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
The present invention provides a femoral prosthesis, referring to fig. 1 to 4, the femoral prosthesis comprises a distal stem end 10 and a proximal stem end 20, the proximal stem end 20 is detachably disposed on the distal stem end 10, the femoral prosthesis further comprises: the adjusting cushion block 30 is arranged between the handle body distal end 10 and the handle body proximal end 20; wherein the distal end 10 of the handle body has a first bonding surface 11 and a second bonding surface 12 intersecting the first bonding surface 11, the proximal end 20 of the handle body has a third bonding surface and a fourth bonding surface corresponding to the first bonding surface 11 and the second bonding surface 12, respectively, and the adjusting pad 30 is detachably disposed between the first bonding surface 11 and the third bonding surface and/or between the second bonding surface 12 and the fourth bonding surface.
The femoral prosthesis of the present invention enables quick assembly and disassembly of the femoral prosthesis through the distal handle end 10, the proximal handle end 20, and the adjustment block 30, wherein the adjustment block 30 is disposed between the distal handle end 10 and the proximal handle end 20. When repairing the femoral prosthesis, according to the physiological eccentricity and neck height requirement of a patient after repairing, a corresponding adjusting cushion block 30 is selected, when only the deflection distance needs to be adjusted, the adjusting cushion block 30 is arranged between the second bonding surface 12 and the fourth bonding surface, the first bonding surface 11 and the third bonding surface are bonded, or when only the neck height needs to be adjusted, the adjusting cushion block 30 is arranged between the first bonding surface 11 and the third bonding surface, the second bonding surface 12 and the fourth bonding surface are bonded, if the eccentricity and the neck height are required to be adjusted simultaneously, a proper adjusting cushion block 30 is selected, and the adjusting cushion block is arranged between the second bonding surface 12 and the fourth bonding surface and between the first bonding surface 11 and the third bonding surface.
Compared with the femoral prosthesis in the prior art, in order to achieve soft tissue balance of a patient after revision, an unsmooth femoral stem is required to be taken out, the operation workload is large, time is long, risks are high, even the femoral stem of the patient is fractured, even the split femoral stem cannot be well matched with physiological eccentricity and neck height of the patient after revision, the real soft tissue balance cannot be achieved, and the service life of the revision prosthesis is shortened.
To enable adjustment of the neck height of the femoral prosthesis, as shown in fig. 2, the adjustment block 30 comprises: the first adjusting block 31, the first adjusting block 31 is disposed between the first abutment surface 11 and the third abutment surface. Through being provided with first regulating block 31 on adjusting block 30, first regulating block 31 sets up between first faying surface 11 and third faying surface, in order to realize the individual adjustment to the neck height of femoral prosthesis, first regulating block 31 sets up between first faying surface 11 and third faying surface, and the at least partial contact of second faying surface 12 and fourth faying surface to guarantee the steady cooperation of handle body distal end 10 and handle body proximal end 20.
To ensure stability of the mounting of the distal handle end 10 and the proximal handle end 20, the center line of the distal handle end 10 is perpendicular to the first abutment surface 11.
In this embodiment, the distal stem 10 is composed of a cylindrical body and a protruding portion protruding from an outer wall of the cylindrical body, wherein a center line of the distal stem 10 is a center axis of the cylindrical body, the adjustment of the neck height of the femoral prosthesis can be understood as the adjustment of the distance from the first fitting surface 11 to the center point of the end surface of the proximal stem 20 away from the distal stem 10, and the adjustment of the eccentricity of the femoral prosthesis can be understood as the adjustment of the distance from the center line of the distal stem 10 to the center point of the end surface of the proximal stem 20 away from the distal stem 10.
To enable adjustment of the femoral prosthesis eccentricity, as shown in fig. 2, the adjustment block 30 includes: and a second adjustment block 32, the second adjustment block 32 being disposed between the second abutment surface 12 and the fourth abutment surface. By providing the second adjustment block 32 on the adjustment block 30, the second adjustment block 32 is disposed between the second abutment 12 and the fourth abutment, at least a portion of the first abutment 11 and the third abutment being in contact, thereby ensuring a stable fit of the distal handle end 10 and the proximal handle end 20 for the purpose of individual adjustment of the offset distance of the femoral prosthesis.
To achieve adjustment of the femoral prosthesis eccentricity, the center line of the distal end 10 of the stem body is inclined to the second abutment surface 12.
In this embodiment, the distal stem 10 has a first abutment 11 and a second abutment 12 intersecting the first abutment 11, wherein the centerline of the distal stem 10 is perpendicular to the first abutment 11 and the centerline of the distal stem 10 is inclined to the second abutment 12, thereby allowing adjustment of the neck height and eccentricity of the femoral prosthesis by adjusting the spacer 30.
In order to be able to adjust the neck height and the eccentricity of the femoral prosthesis simultaneously, as shown in fig. 4, the adjusting pad 30 is a bending plate which is provided with a first adjusting block 31 and a second adjusting block 32; wherein, first regulating block 31 sets up between first faying surface 11 and third faying surface, and second regulating block 32 sets up between second faying surface 12 and fourth faying surface.
In the present embodiment, the adjusting pad 30 is set as a bending plate, wherein the bending plate is provided with a first adjusting block 31 and a second adjusting block 32, and the first adjusting block 31 is arranged between the first fitting surface 11 and the third fitting surface, and the second adjusting block 32 is arranged between the second fitting surface 12 and the fourth fitting surface, so that the neck height and the eccentricity of the femoral prosthesis are simultaneously adjusted.
In order to ensure the complete bonding of the bending plate to the first bonding surface 11 and the third bonding surface and to the second bonding surface 12 and the fourth bonding surface, as shown in fig. 4, the bending plate has a transition block 33, a first end of the transition block 33 is connected to the first adjusting block 31, and a second end of the transition block 33 is connected to the second adjusting block 32. By providing the transition piece 33 on the bending plate, wherein a first end of the transition piece 33 is connected to the first adjustment piece 31, a second end of the transition piece 33 is connected to the second adjustment piece 32.
Preferably, the transition plate is an arcuate plate to also relieve stress concentrations while ensuring that the distal handle body end 10 and proximal handle body end 20 are fully attached by the bent plate.
In this embodiment, the adjusting pad 30 is composed of a first adjusting block 31, a transition block 33 and a second adjusting block 32, wherein a first end of the transition block 33 is connected with the first adjusting block 31, a second end of the transition block 33 is connected with the second adjusting block 32, in a specific installation process, the first adjusting block 31 is disposed between the first fitting surface 11 and the third fitting surface, the second adjusting block 32 is disposed between the second fitting surface 12 and the fourth fitting surface, and the adjustment of the neck height and the eccentricity of the femoral prosthesis is achieved by adjusting the first adjusting block 31 and the second adjusting block 32.
In order to facilitate processing and ensure the use strength of the adjusting pad 30, the first adjusting block 31, the transition block 33 and the second adjusting block 32 are integrally formed. Through the integrated into one piece preparation with first regulating block 31, transition piece 33 and second regulating block 32 to can guarantee convenient and the use intensity of assurance regulation cushion 30 of processing.
In order to achieve stable connection between the proximal end 20 of the handle body and the distal end 10 of the handle body, as shown in fig. 2 and 3, a connection hole 13 is provided on the distal end 10 of the handle body, a connection portion 21 adapted to the connection hole 13 is provided on the proximal end 20 of the handle body, and the connection portion 21 is inserted into the connection hole 13.
In this embodiment, the connecting hole 13 is provided on the distal end 10 of the handle body, the connecting portion 21 adapted to the connecting hole 13 is provided on the proximal end 20 of the handle body, and the connecting portion 21 is inserted into the connecting hole 13, so that stable connection between the proximal end 20 of the handle body and the distal end 10 of the handle body can be ensured.
In this embodiment, the first adjusting block 31 of the adjusting pad 30 has a plug hole adapted to the connecting portion 21, so that when the neck height of the femoral prosthesis needs to be adjusted, the connecting portion 21 is inserted into the connecting hole 13 through the plug hole, thereby realizing stable connection between the proximal end 20 of the stem body and the distal end 10 of the stem body.
To further secure the proximal handle end 20 to the distal handle end 10, as shown in FIG. 2, the distal handle end 10 is provided with a first locking aperture 14 through which a fastener passes, the proximal handle end 20 is provided with a second locking aperture 22 through which a fastener passes, and the first locking aperture 14 is disposed opposite the second locking aperture 22 such that the fastener passes within the second locking aperture 22 and the first locking aperture 14.
In this embodiment, the handle proximal end 20 and the handle distal end 10 are further secured by providing a first locking aperture 14 in the handle distal end 10 through which the fastener passes, and providing a second locking aperture 22 in the handle proximal end 20 through which the fastener passes, wherein the first locking aperture 14 is disposed opposite the second locking aperture 22, thereby enabling the fastener to pass through the second locking aperture 22 and the first locking aperture 14.
In this embodiment, the second adjustment block 32 of the adjustment block 30 has a third locking hole that is adapted to receive a fastener, such that when adjustment of the eccentricity of the femoral prosthesis is desired, the fastener is inserted through the second locking hole 22 and the third locking hole into the first locking hole 14, thereby achieving a stable connection of the proximal handle body 20 to the distal handle body 10.
The femoral prosthesis of the present invention is divided into three components, a proximal stem end 20, a distal stem end 10, and a spacer (adjustment spacer 30).
When the revision surgery is performed, the distal end 10 of the shank is well combined with the femur, and when no loosening occurs, only the proximal end 20 of the shank and the cushion block need to be replaced in order to match the physiological eccentricity and neck height of the patient after revision.
The spacer has two thickness parameters, which can be used to adjust the neck height and eccentricity of the femoral stem, respectively, without affecting each other.
For revision patients with larger femoral defects, the outer contours of the proximal handle 20 and spacer may be increased, which is used for patients with proximal femur resections.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
the femoral prosthesis of the present invention enables quick assembly and disassembly of the femoral prosthesis through the distal handle end 10, the proximal handle end 20, and the adjustment block 30, wherein the adjustment block 30 is disposed between the distal handle end 10 and the proximal handle end 20. When repairing the femoral prosthesis, according to the physiological eccentricity and neck height requirement of a patient after repairing, a corresponding adjusting cushion block 30 is selected, when only the deflection distance needs to be adjusted, the adjusting cushion block 30 is arranged between the second bonding surface 12 and the fourth bonding surface, the first bonding surface 11 and the third bonding surface are bonded, or when only the neck height needs to be adjusted, the adjusting cushion block 30 is arranged between the first bonding surface 11 and the third bonding surface, the second bonding surface 12 and the fourth bonding surface are bonded, if the eccentricity and the neck height are required to be adjusted simultaneously, a proper adjusting cushion block 30 is selected, and the adjusting cushion block is arranged between the second bonding surface 12 and the fourth bonding surface and between the first bonding surface 11 and the third bonding surface.
Compared with the femoral prosthesis in the prior art, in order to achieve soft tissue balance of a patient after revision, an unsmooth femoral stem is required to be taken out, the operation workload is large, time is long, risks are high, even the femoral stem of the patient is fractured, even the split femoral stem cannot be well matched with physiological eccentricity and neck height of the patient after revision, the real soft tissue balance cannot be achieved, and the service life of the revision prosthesis is shortened.
The femoral prosthesis is of a split type design, and if the distal end of the handle body is well fixed during repairing, only the proximal end of the handle body and the cushion block need to be replaced; the two thicknesses of the cushion block determine the eccentricity of the femoral stem and the neck height, and have no influence on each other; the outer contours of the proximal end of the stem and the spacer may be increased for use with a patient having proximal resection of the femur. The assembled design reduces the operation time in the revision surgery, reduces the risk of patients and reduces the cost.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A femoral prosthesis comprising a shaft distal end (10) and a shaft proximal end (20), characterized in that the shaft proximal end (20) is detachably arranged on the shaft distal end (10), the femoral prosthesis further comprising:
the adjusting cushion block (30) is arranged between the handle body distal end (10) and the handle body proximal end (20);
the handle body far end (10) is provided with a first bonding surface (11) and a second bonding surface (12) intersected with the first bonding surface (11), the handle body near end (20) is provided with a third bonding surface and a fourth bonding surface which correspond to the first bonding surface (11) and the second bonding surface (12) respectively, the adjusting cushion block (30) is detachably arranged between the first bonding surface (11) and the third bonding surface and between the second bonding surface (12) and the fourth bonding surface, and the eccentricity and neck height adjustment of the handle body far end (10) can be realized through different adjusting cushion blocks (30);
the adjusting cushion block (30) is a bending plate, and the bending plate is provided with a first adjusting block (31) and a second adjusting block (32); wherein the first adjusting block (31) is arranged between the first bonding surface (11) and the third bonding surface, and the second adjusting block (32) is arranged between the second bonding surface (12) and the fourth bonding surface.
2. Femoral prosthesis according to claim 1, wherein the centre line of the distal end (10) of the stem is perpendicular to the first abutment surface (11).
3. The femoral prosthesis according to claim 1, wherein the centre line of the distal shank end (10) is inclined to the second abutment surface (12).
4. The femoral prosthesis according to claim 1, wherein the bending plate has a transition block (33), a first end of the transition block (33) being connected to the first adjustment block (31), and a second end of the transition block (33) being connected to the second adjustment block (32).
5. The femoral prosthesis according to claim 4, wherein the first adjustment block (31), the transition block (33) and the second adjustment block (32) are integrally formed.
6. Femoral prosthesis according to claim 1, wherein the distal end (10) of the stem body is provided with a connecting hole (13), the proximal end (20) of the stem body is provided with a connecting portion (21) adapted to the connecting hole (13), and the connecting portion (21) is inserted into the connecting hole (13).
7. The femoral prosthesis according to claim 1, wherein the distal end (10) of the stem body is provided with a first locking aperture (14) through which a fastener passes, the proximal end (20) of the stem body is provided with a second locking aperture (22) through which the fastener passes, and the first locking aperture (14) is disposed opposite the second locking aperture (22) such that the fastener passes within the second locking aperture (22) and the first locking aperture (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710700435.0A CN107550605B (en) | 2017-08-15 | 2017-08-15 | Femoral prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710700435.0A CN107550605B (en) | 2017-08-15 | 2017-08-15 | Femoral prosthesis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107550605A CN107550605A (en) | 2018-01-09 |
| CN107550605B true CN107550605B (en) | 2023-07-28 |
Family
ID=60975579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710700435.0A Active CN107550605B (en) | 2017-08-15 | 2017-08-15 | Femoral prosthesis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107550605B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110115646B (en) * | 2019-06-04 | 2023-11-14 | 山东大学齐鲁医院(青岛) | Femoral stem test mold with auxiliary dislocation function |
| CN110840628A (en) * | 2019-12-02 | 2020-02-28 | 北京爱康宜诚医疗器材有限公司 | Hip joint prosthesis |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0220803A3 (en) * | 1985-09-16 | 1987-10-21 | Dow Corning Corporation | Multiple component hip femoral prosthesis |
| FR2646596B3 (en) * | 1989-05-05 | 1991-05-31 | Roger Beranger | FEMALE PROSTHESIS SYSTEM |
| US6093209A (en) * | 1998-08-20 | 2000-07-25 | Johnson & Johnson Professional, Inc. | Proximally holllow prosthesis |
| ATE417574T1 (en) * | 2000-07-20 | 2009-01-15 | Depuy Orthopaedics Inc | MODULAR CONNECTION FOR AN ORTHOPEDIC COMPONENT |
-
2017
- 2017-08-15 CN CN201710700435.0A patent/CN107550605B/en active Active
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| CN107550605A (en) | 2018-01-09 |
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