CN110916854A - Knee joint prosthesis - Google Patents
Knee joint prosthesisDownload PDFInfo
- Publication number
- CN110916854A CN110916854ACN201911419808.2ACN201911419808ACN110916854ACN 110916854 ACN110916854 ACN 110916854ACN 201911419808 ACN201911419808 ACN 201911419808ACN 110916854 ACN110916854 ACN 110916854A
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- tibial
- locking
- assembly
- knee joint
- joint prosthesis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/38—Joints for elbows or knees
- A61F2/389—Tibial components
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Physical Education & Sports Medicine (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
Translated fromChinese
Description
Technical Field
The invention relates to the technical field of medical treatment, in particular to a knee joint prosthesis.
Background
Knee joint prosthesis includes thighbone subassembly and tibial component, and wherein the tibial component includes tibial plateau and tibial gasket etc. when implanting knee joint prosthesis shin bone among the prior art, generally adopt the joint between tibial plateau and the tibial gasket, and the joint structure is more difficult when the erection joint, and causes the damage to the prosthesis easily, and appears not hard up problem behind tibial plateau and the tibial gasket joint easily, also unreliable when being connected with the shin bone.
Disclosure of Invention
The invention mainly aims to provide a knee joint prosthesis, which solves the problem that the connection between a tibial plateau and a tibial gasket in the prior art is unreliable.
In order to achieve the above object, according to one aspect of the present invention, there is provided a knee joint prosthesis comprising: the tibia gasket is arranged on the tibia platform; and the locking assembly is arranged on the tibial platform and/or the tibial gasket and is used for locking the tibial gasket on the tibial platform.
Furthermore, the locking assembly is provided with a locking position and an avoiding position, and the locking assembly is movably arranged on the tibial platform so as to lock the tibial gasket on the tibial platform when the locking assembly moves to the locking position, and separate the locking assembly from the tibial gasket so as to move the tibial gasket relative to the tibial platform when the locking assembly moves to the avoiding position.
Further, the locking assembly comprises a first locking part and a second locking part, the first locking part and the second locking part are arranged in a relatively movable mode, and a positioning space is formed between the first locking part and the second locking part; when the tibial insert moves into the positioning space, the first locking part and the second locking part move relatively close to lock the tibial insert in the positioning space.
Further, the knee joint prosthesis further comprises: and the connecting rod assembly is arranged on the tibial platform and is used for driving the locking assembly to move.
Further, the connecting rod assembly includes: the first connecting rod group is connected with the first locking part; the second connecting rod group is connected with the second locking part; the first connecting rod group and the second connecting rod group simultaneously drive the first locking part and the second locking part to move relatively close to or far away from each other.
Furthermore, a driving part is arranged on the tibial gasket, so that when the tibial gasket is connected with the tibial platform, the driving part drives the connecting rod component to move so as to drive the locking component to move towards the locking position.
Furthermore, the driving part comprises a driving column, an inserting hole is formed in the tibial platform, and the tibial gasket is inserted into the inserting hole through the driving column to be connected with the tibial platform; the connecting rod assembly is at least partially arranged in the inserting hole, so that when the driving column is inserted into the inserting hole, the driving column is in contact with the connecting rod assembly and drives the connecting rod assembly to move.
Furthermore, a positioning bulge is arranged on the driving column, a positioning groove is also arranged on the tibial platform, and the positioning groove is arranged in the insertion hole; the driving column is inserted into the insertion hole, and the positioning protrusion is clamped in the positioning groove to lock the driving column in the insertion hole.
Further, be equipped with on the tibial plateau and insert and establish the hole, knee joint prosthesis still includes: the positioning rod is at least partially inserted into the insertion hole to be connected with the tibial platform; wherein, the one end of locating lever is kept away from the shin bone platform is inserted and is established in the pulp cavity of shin bone to fix a position the shin bone platform on the shin bone.
Furthermore, the knee joint prosthesis further comprises a pressure spring assembly, and the pressure spring assembly is in driving connection with the locking assembly so as to drive the locking assembly to move towards the avoiding position.
The knee joint prosthesis applying the technical scheme of the invention is mainly used for prosthesis replacement of a knee joint, and comprises a tibial platform and a tibial gasket, wherein the tibial platform and the tibial gasket in the prior art are mainly connected through a clamping groove, the tibial platform clamps the tibial gasket, but the tibial gasket can shake, and when the tibial platform and the tibial gasket are connected in a clamping way, the tibial gasket needs to be extruded onto the tibial platform, so that the knee joint prosthesis is difficult to mount, easy to wear, unstable after connection and inconvenient for secondary disassembly.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a structural cross-sectional view of an embodiment of a knee joint prosthesis according to the present invention;
FIG. 2 illustrates a cross-sectional view of an embodiment of the connection of the tibial plateau of the knee prosthesis with the locking assembly and linkage assembly of the present invention;
FIG. 3 is a schematic view of the mounting arrangement of the tibial plateau and locking assembly of the knee prosthesis of the present invention;
FIG. 4 shows a schematic view of an embodiment of a tibial insert of the knee prosthesis of the present invention;
fig. 5 shows a schematic view of an embodiment of a positioning stem of the knee joint prosthesis of the present invention.
Wherein the figures include the following reference numerals:
10. a tibial plateau; 11. inserting the holes; 20. a tibial insert; 21. a drive section; 211. positioning the projection; 30. a locking assembly; 31. a first locking portion; 32. a second locking portion; 40. a connecting rod assembly; 41. a first link group; 42. a second linkage; 50. positioning a rod; 60. a compression spring assembly.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The present invention provides a knee joint prosthesis, please refer to fig. 1 to 5, comprising: atibial plateau 10 and atibial insert 20, thetibial insert 20 being disposed on thetibial plateau 10; a locking assembly 30, the locking assembly 30 being disposed on thetibial plateau 10 and/or thetibial insert 20 for locking thetibial insert 20 to thetibial plateau 10.
The knee joint prosthesis is mainly used for prosthesis replacement of a knee joint, and comprises a tibial platform and atibial gasket 20, the tibial platform and the tibial gasket in the prior art are mainly connected through a clamping groove, the tibial platform clamps the tibial gasket, but the tibial gasket can shake, and when the tibial platform and the tibial gasket are connected in a clamping mode, the tibial gasket needs to be extruded onto the tibial platform, so that the knee joint prosthesis is difficult to mount, easy to wear, unstable after connection and inconvenient to disassemble for the second time.
The locking assembly 30 has a locking position and an escape position, and the locking assembly 30 is movably disposed on thetibial plateau 10 to lock thetibial insert 20 to thetibial plateau 10 when the locking assembly 30 is moved to the locking position and to disengage the locking assembly 30 from thetibial insert 20 to allow thetibial insert 20 to move relative to thetibial plateau 10 when the locking assembly 30 is moved to the escape position.
Preferably, a sliding track or guide slot is also provided on the tibial plateau, and the locking assembly is movably disposed within the sliding track or guide slot for movement between the locked position and the bypass position.
The locking assembly 30 comprises afirst locking part 31 and asecond locking part 32, thefirst locking part 31 and thesecond locking part 32 are relatively movably arranged, and a positioning space is arranged between thefirst locking part 31 and thesecond locking part 32; wherein when thetibial insert 20 is moved into the positioning space, thefirst locking portion 31 and thesecond locking portion 32 move relatively closer together to lock thetibial insert 20 in the positioning space.
Thefirst locking portion 31 and thesecond locking portion 32 in this embodiment are both arc-shaped buckles, and when locking is needed, thefirst locking portion 31 and thesecond locking portion 32 move close to each other, so that the tibial insert is fixed in the positioning space.
The knee joint prosthesis further comprises: alinkage assembly 40, thelinkage assembly 40 being disposed on thetibial plateau 10 for driving the locking assembly 30 in movement. Thelink assembly 40 includes: afirst link group 41, thefirst link group 41 being connected to thefirst locking portion 31; asecond linkage 42, thesecond linkage 42 being connected to thesecond locking portion 32; wherein thefirst linkage 41 and thesecond linkage 42 simultaneously drive thefirst locking portion 31 and thesecond locking portion 32 to move relatively close to or away from each other.
The knee joint prosthesis in this embodiment further includes alink assembly 40, thelink assembly 40 being hinged to the locking assembly, preferably, the link assembly includes two opposing linkage sets, the first linkage set and the second linkage set being connected to the first locking portion and the second locking portion, respectively, for simultaneously driving the first locking portion and the second locking portion to move by simultaneously driving the first linkage set and the second linkage set to move.
Thetibial insert 20 is provided with adriving portion 21, so that when thetibial insert 20 is connected to thetibial platform 10, thedriving portion 21 drives theconnecting rod assembly 40 to move so as to drive the locking assembly 30 to move towards the locking position. Thedriving part 21 comprises a driving column, aninserting hole 11 is arranged on thetibial platform 10, and thetibial gasket 20 is inserted in theinserting hole 11 through the driving column to be connected with thetibial platform 10; wherein, theconnecting rod assembly 40 is at least partially disposed in theinsertion hole 11, so that when the driving column is inserted in theinsertion hole 11, the driving column contacts with theconnecting rod assembly 40 and drives theconnecting rod assembly 40 to move.
In this embodiment, set up on tibial plateau and insert and establishhole 11, the one end of first connecting rod group is located to insert and establishes thehole 11 in the other end and articulated with first locking portion, the one end of second connecting rod group is located to insert and establishes downthehole other end and articulated with second locking portion, the in-process of downthehole removal is established to inserting to the drive post on the tibial gasket, the drive post contacts with first connecting rod group and second connecting rod group and promotes first connecting rod group and second connecting rod group motion, so that locking Assembly moves with the chucking drive post towards the drive post, thereby be connected tibial gasket and tibial plateau.
The drive column is provided with apositioning bulge 211, thetibial platform 10 is also provided with a positioning groove, and the positioning groove is arranged in theinsertion hole 11; wherein, the driving column is inserted into theinsertion hole 11, and thepositioning protrusion 211 is clamped in the positioning groove to lock the driving column in theinsertion hole 11.
The tip at the drive column in this embodiment still is equipped withround location arch 211, is equipped with the constant head tank in tibial plateau and the protruding complex position in location, and afterlocation arch 211 card was established in the constant head tank, the tibial gasket closely cooperated with the tibial plateau, and the location arch can prevent that the location gasket from breaking away from the location platform.
Be equipped with ontibial plateau 10 and insert and establishhole 11, knee joint prosthesis still includes: apositioning rod 50, thepositioning rod 50 being at least partially inserted in theinsertion hole 11 to be connected with thetibial platform 10; wherein an end of thepositioning rod 50 remote from thetibial plateau 10 is inserted into the medullary canal of the tibia to position thetibial plateau 10 on the tibia.
Preferably, the lower part of the insertion hole is also provided with an internal thread, one end of the positioning rod connected with the insertion hole is provided with an external thread so that the positioning rod is in threaded connection with the tibial plateau, and the lower end of the positioning rod is inserted into a medullary cavity of the tibia so as to fix the positioning plateau and the tibia together, so that the tibial gasket, the tibial plateau and the tibia are reliably connected.
The knee joint prosthesis further comprises acompression spring assembly 60, and thecompression spring assembly 60 is in driving connection with the locking assembly 30 to drive the locking assembly 30 to move towards the avoiding position.
Preferably, the compression spring assembly is disposed on the tibial platform, and thecompression spring assembly 60 includes two compression springs respectively connected to the first linkage and the second linkage to provide a force to the locking assembly to move toward the avoidance position through the linkage assembly.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
according to the knee joint prosthesis, the connecting rod assembly and the locking assembly are arranged on the knee joint prosthesis, the locking claw is preferably selected by the locking assembly, the connecting rod assembly is stirred downwards by the driving column below the knee joint prosthesis when the knee joint prosthesis is installed through the tibial gasket, and the two locking claws above the multistage connecting rod drive are buckled on the tibial gasket in a sliding mode inwards through the guide groove rails to form locking.
Knee joint prosthesis below in this application can be through threaded connection locating lever.
The lower driving column of the tibia gasket of the knee joint prosthesis and the inner side structure of the head of the positioning rod have a matching design, and can be directly pressed in and locked to match.
During the prosthesis operation, after the operation osteotomy is completed, the tibia platform and the positioning rod are connected through the screw thread and are inserted into the medullary cavity of the tibia for fixation.
And then the tibial gasket is vertically pressed into the tibial platform and is matched and locked with the hole groove of the positioning rod, and meanwhile, the tibial gasket is locked by the platform locking assembly to complete installation, so that the installation stability of the tibial gasket is enhanced.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. 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, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A knee joint prosthesis, comprising:
a tibial plateau (10) and a tibial insert (20), the tibial insert (20) being disposed on the tibial plateau (10);
a locking assembly (30), the locking assembly (30) being provided on the tibial plateau (10) and/or the tibial insert (20) for locking the tibial insert (20) on the tibial plateau (10).
2. The knee joint prosthesis of claim 1, wherein the locking assembly (30) has a locking position and an escape position, the locking assembly (30) being movably disposed on the tibial plateau (10) to lock the tibial insert (20) to the tibial plateau (10) when the locking assembly (30) is moved to the locking position and to disengage the locking assembly (30) from the tibial insert (20) to move the tibial insert (20) relative to the tibial plateau (10) when the locking assembly (30) is moved to the escape position.
3. The knee joint prosthesis according to claim 2, wherein the locking assembly (30) comprises a first locking part (31) and a second locking part (32), the first locking part (31) and the second locking part (32) being relatively movably arranged, the first locking part (31) and the second locking part (32) having a positioning space therebetween;
wherein when the tibial insert (20) is moved into the positioning space, the first locking portion (31) and the second locking portion (32) move relatively close together to lock the tibial insert (20) in the positioning space.
4. The knee joint prosthesis of claim 3, further comprising:
a linkage assembly (40), the linkage assembly (40) being disposed on the tibial plateau (10) for driving the locking assembly (30) to move.
5. Knee joint prosthesis according to claim 4, characterized in that the linkage assembly (40) comprises:
a first link group (41), the first link group (41) being connected to the first locking portion (31);
a second linkage (42), the second linkage (42) being connected to the second locking portion (32);
wherein the first linkage (41) and the second linkage (42) simultaneously drive the first locking portion (31) and the second locking portion (32) to move relatively close to or away from each other.
6. The knee joint prosthesis according to claim 4, characterized in that the tibial insert (20) is provided with a drive portion (21) such that when the tibial insert (20) is coupled to the tibial plateau (10), the drive portion (21) drives the linkage assembly (40) to move so as to move the locking assembly (30) towards the locking position.
7. The knee joint prosthesis according to claim 6, wherein the driving portion (21) comprises a driving post, the tibial plateau (10) is provided with an insertion hole (11), and the tibial insert (20) is inserted in the insertion hole (11) through the driving post to be connected with the tibial plateau (10);
the connecting rod assembly (40) is at least partially arranged in the inserting hole (11), so that when the driving column is inserted in the inserting hole (11), the driving column is in contact with the connecting rod assembly (40) and drives the connecting rod assembly (40) to move.
8. The knee joint prosthesis according to claim 7, wherein the driving column is provided with a positioning projection (211), and the tibial plateau (10) is further provided with a positioning groove, and the positioning groove is arranged in the insertion hole (11);
the driving column is inserted into the insertion hole (11), and the positioning protrusion (211) is clamped in the positioning groove to lock the driving column in the insertion hole (11).
9. The knee joint prosthesis according to claim 1, characterized in that said tibial plateau (10) is provided with an insertion hole (11), and in that it further comprises:
a positioning rod (50), the positioning rod (50) being at least partially inserted in the insertion hole (11) to be connected with the tibial platform (10);
wherein one end of the positioning rod (50) far away from the tibial platform (10) is inserted into a medullary cavity of the tibia so as to position the tibial platform (10) on the tibia.
10. The knee prosthesis of claim 2, further comprising a compression spring assembly (60), the compression spring assembly (60) being drivingly connected to the locking assembly (30) to urge the locking assembly (30) toward the retracted position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911419808.2ACN110916854B (en) | 2019-12-31 | 2019-12-31 | Knee prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911419808.2ACN110916854B (en) | 2019-12-31 | 2019-12-31 | Knee prosthesis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110916854Atrue CN110916854A (en) | 2020-03-27 |
| CN110916854B CN110916854B (en) | 2025-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911419808.2AActiveCN110916854B (en) | 2019-12-31 | 2019-12-31 | Knee prosthesis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110916854B (en) |
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| CN112972072A (en)* | 2021-03-04 | 2021-06-18 | 北京中安泰华科技有限公司 | Knee joint cushion block, tibia support prosthesis and combined knee joint prosthesis |
| CN116898640A (en)* | 2023-07-10 | 2023-10-20 | 佳木斯骨科医院有限公司 | Implantable lower limb prosthesis for knee joint replacement |
| CN117100466A (en)* | 2023-10-20 | 2023-11-24 | 南方医科大学珠江医院 | Tibia extension rod in knee joint renovation operation |
| CN118892386A (en)* | 2024-09-09 | 2024-11-05 | 北京爱康宜诚医疗器材有限公司 | Tibial prosthesis |
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| CN117100466A (en)* | 2023-10-20 | 2023-11-24 | 南方医科大学珠江医院 | Tibia extension rod in knee joint renovation operation |
| CN117100466B (en)* | 2023-10-20 | 2023-12-29 | 南方医科大学珠江医院 | Tibia extension rod in knee joint renovation operation |
| CN118892386A (en)* | 2024-09-09 | 2024-11-05 | 北京爱康宜诚医疗器材有限公司 | Tibial prosthesis |
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