CN107693166A - Lateral femoral condyle prosthesis and artificial knee joint - Google Patents
Lateral femoral condyle prosthesis and artificial knee joint Download PDFInfo
- Publication number
- CN107693166A CN107693166A CN201710917497.7A CN201710917497A CN107693166A CN 107693166 A CN107693166 A CN 107693166A CN 201710917497 A CN201710917497 A CN 201710917497A CN 107693166 A CN107693166 A CN 107693166A
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- China
- Prior art keywords
- cam
- connector
- intercondylar box
- lateral femoral
- femoral condyle
- Prior art date
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Links
- 210000000629 knee joint Anatomy 0.000 title claims abstract description 24
- 210000000689 upper leg Anatomy 0.000 claims abstract description 24
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 12
- 239000000919 ceramic Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 229910000771 Vitallium Inorganic materials 0.000 claims description 8
- 239000000602 vitallium Substances 0.000 claims description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 230000003746 surface roughness Effects 0.000 claims description 6
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 229910000684 Cobalt-chrome Inorganic materials 0.000 claims 1
- 229910001182 Mo alloy Inorganic materials 0.000 claims 1
- 239000010952 cobalt-chrome Substances 0.000 claims 1
- 230000033001 locomotion Effects 0.000 description 10
- 210000002303 tibia Anatomy 0.000 description 9
- 238000005096 rolling process Methods 0.000 description 8
- 210000003127 knee Anatomy 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 5
- 244000227633 Ocotea pretiosa Species 0.000 description 4
- 235000004263 Ocotea pretiosa Nutrition 0.000 description 4
- 210000002967 posterior cruciate ligament Anatomy 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 206010017389 Frotteurism Diseases 0.000 description 1
- 238000011882 arthroplasty Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 210000003041 ligament Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035790 physiological processes and functions Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- A61F2/3859—Femoral 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
- A61F2/38—Joints for elbows or knees
- A61F2/3836—Special connection between upper and lower leg, e.g. constrained
Landscapes
- 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
The present invention relates to technical field of medical instruments, more particularly to a kind of lateral femoral condyle prosthesis and artificial knee joint.The lateral femoral condyle prosthesis includes condyle of femur base body and cam；The cam is arranged in the intercondylar box of the condyle of femur base body, and the cam is rotatably connected with the intercondylar box.The artificial knee joint includes described lateral femoral condyle prosthesis.It is an object of the invention to provide lateral femoral condyle prosthesis and artificial knee joint, to solve the technical problem of column present in prior art and cam contact position serious wear.
Description
Technical field
The present invention relates to technical field of medical instruments, more particularly to a kind of lateral femoral condyle prosthesis and artificial knee joint.
Background technology
Artificial knee joint prosthesis is implanted in human body through knee prosthesis is postoperative, and its effect is to recover human normal
Physiological function.In replacement knee in arthroplasty, if the lesion of patient, than more serious, its posterior cruciate ligament of knee has no idea to continue to protect
Stay with regard to needing to be cut off in operation.Patient for having cut off posterior cruciate ligament of knee, posterior stabilized prosthese (i.e. PS can only be used
Type prosthese) performed the operation.
For posterior stabilized knee prosthesis, due to having cut off posterior cruciate ligament of knee in operation, therefore in artificial knee joint
There is provided column --- and cam mechanism (i.e. POST-CAM mechanisms) is come the function being simulated and substitute posterior cruciate ligament of knee.After intersect
The active force that ligament rolls after being provided in kneed motion process, and POST-CAM mechanisms pass through the compound of column and cam
Motion is it is achieved thereby that rolling motion after kneed.
In traditional product design, column is each attached on corresponding prosthetic component with cam, and column is fixed on shin bone
On pad, cam is fixed on lateral femoral condyle prosthesis.In motion, column is under sliding friction with cam, and contact position collection
In on fixed region；Over time, the region will be easy to wear, so as to cause artificial knee joint false
The service life reduction of body.
In order to extend the service life of artificial knee joint prosthesis, column and the mill at cam contact position are farthest reduced
Damage, it is necessary to make column be chronically at the friction pair that cam is formed in a kind of rational Frotteurism.
Therefore, the application provides a kind of new lateral femoral condyle prosthesis and artificial knee joint regarding to the issue above, to reduce column
With the abrasion at cam contact position.
The content of the invention
It is an object of the invention to provide lateral femoral condyle prosthesis, to solve column present in prior art and cam contact portion
The technical problem of position serious wear.
The present invention also aims to provide artificial knee joint, to solve column present in prior art and cam contact
The technical problem of position serious wear.
Based on above-mentioned first purpose, lateral femoral condyle prosthesis provided by the invention, including condyle of femur base body and cam；
The cam is arranged in the intercondylar box of the condyle of femur base body, and the cam and the intercondylar box are rotatable
Connection.
The optional technical scheme of the present invention is that described lateral femoral condyle prosthesis includes connector；Axle of the cam along itself
To being provided with cam through hole；
The connector and the cam through hole grafting, and the both ends of the connector are connected with the intercondylar box respectively.
The optional technical scheme of the present invention is that the connector is provided with least two stopper slots, and the stopper slot is located at
In the intercondylar box；
At least one locating part is connected with each stopper slot, is provided between two stopper slots described convex
Wheel；
The intercondylar box is provided with the intercondylar box connecting hole being connected with the connector；
It is more than most greatly enhancing for the cam through hole along the maximum length perpendicular to the axial direction of the cam, the locating part
Degree, and the maximum length of the locating part is more than the maximum length of the intercondylar box connecting hole.
The optional technical scheme of the present invention is that the both ends of the connector are respectively mounted by engaging bolts to be connected with the intercondylar box
Connect；The screw head of the attachment screw is located at the outside of the intercondylar box；
The intercondylar box is provided with the intercondylar box connecting hole being connected with the connector；
Along perpendicular to the axial direction of the cam, the sectional area of the screw head is more than the section of the intercondylar box connecting hole
Product.
The optional technical scheme of the present invention is that the cam is rotatably connected with the connector, the connector and institute
Intercondylar box is stated to be rotatably connected；
Or the cam is rotatably connected with the connector, the connector is fixedly connected with the intercondylar box；
Or the cam is fixedly connected with the connector, the connector is rotatably connected with the intercondylar box.
The optional technical scheme of the present invention is to pass through axle between the intercondylar box and/or the cam, with the connector
Hold connection.
The optional technical scheme of the present invention is that the material of the condyle of femur base body is vitallium, alumina base pottery
Porcelain or zirconia-based ceramics；
The material of the cam is vitallium, alumina-based ceramic or zirconia-based ceramics；
The material of the connector is vitallium, titanium alloy or stainless steel.
The optional technical scheme of the present invention is that the gap between the cam and the intercondylar box is 0.2mm-1mm；
Gap between the cam and the connector is 0.05mm-0.2mm；
Surface roughness≤Ra0.1 of the cam；
Surface roughness≤Ra0.1 of the connector.
The optional technical scheme of the present invention is that the cam is revolving body；
Or the cam is non-revolved body, and the outer surface of the non-revolved body includes surface of revolution, and the revolution is bent
Face is close to the center of the intercondylar box.
Based on above-mentioned second purpose, artificial knee joint provided by the invention, including described lateral femoral condyle prosthesis.
Beneficial effects of the present invention：
Lateral femoral condyle prosthesis provided by the invention, including condyle of femur base body and cam, pass through cam and condyle of femur base body
Intercondylar box be rotatably connected so that cam can roll relative to condyle of femur base body when column and cam are in contact motion
It is dynamic, the friction between column and cam can be made to change into rolling friction by sliding the sassafras that rubs, so as to drop to a certain extent
Low column and the abrasion at cam contact position, improve the service life of column and cam, so improve with column with
The service life of the artificial knee joint prosthesis of cam.
Artificial knee joint provided by the invention, rubbing between the column of shin bone pad and the cam of lateral femoral condyle prosthesis can be made
Wipe and rolling friction is changed into by the slip sassafras that rubs, so as to reduce the mill of column and cam contact position to a certain extent
Damage, improves the service life of column and cam, and then improve the use of the artificial knee joint prosthesis with column and cam
Life-span.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the first angle structural representation for the lateral femoral condyle prosthesis that the embodiment of the present invention one provides；
Fig. 2 is the second angle structural representation for the lateral femoral condyle prosthesis that the embodiment of the present invention one provides；
Fig. 3 is the left view of the lateral femoral condyle prosthesis shown in Fig. 2；
Fig. 4 is the top view of the lateral femoral condyle prosthesis shown in Fig. 2；
Fig. 5 is the exploded perspective view for the lateral femoral condyle prosthesis that the embodiment of the present invention one provides；
Fig. 6 is the exploded perspective view of the cam that the embodiment of the present invention one provides and connector；
Fig. 7 is the structural representation for the cam that the embodiment of the present invention one provides；
Fig. 8 is the first angle structural representation for another cam that the embodiment of the present invention one provides；
Fig. 9 is the second angle structural representation for another cam that the embodiment of the present invention one provides；
Figure 10 is the structural representation of the lateral femoral condyle prosthesis that the embodiment of the present invention two provides and shin bone pad；
Figure 11 is the exploded perspective view of the lateral femoral condyle prosthesis that the embodiment of the present invention two provides and shin bone pad.
Icon：100- lateral femoral condyle prosthesis；110- condyle of femur base bodies；111- intercondylar box；120- cams；121- cams lead to
Hole；130- connectors；131- stopper slots；140- locating parts；200- shin bones pad；210- columns.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify description, rather than instruction or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that instruction or hint relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
Embodiment one
Referring to shown in Fig. 1-Fig. 9, a kind of lateral femoral condyle prosthesis is present embodiments provided；Fig. 1 is the femur that the present embodiment provides
The stereogram of condyle prosthese；Fig. 2 is the front view for the lateral femoral condyle prosthesis that the present embodiment provides；Fig. 3 is the lateral femoral condyle prosthesis shown in Fig. 2
Left view；Fig. 4 is the top view of the lateral femoral condyle prosthesis shown in Fig. 2；Fig. 5 is the blast for the lateral femoral condyle prosthesis that the present embodiment provides
Schematic diagram；In order to more clearly show that the structure of cam and connector, Fig. 6 is the exploded perspective view of cam and connector；Figure
7- Fig. 9 is the structural representation of cam, wherein, the cam shown in Fig. 7 is revolving body, and the cam shown in Fig. 8, Fig. 9 is non-rotating
Body.
Referring to the lateral femoral condyle prosthesis that shown in Fig. 1-Fig. 9, the present embodiment provides, applied to artificial knee joint, including condyle of femur
Base body 110 and cam 120.
Cam 120 is arranged in the intercondylar box 111 of condyle of femur base body 110, and cam 120 and intercondylar box 111 are rotatable
Connection.Alternatively, condyle of femur base body 110 includes preartis, intercondylar box 111 and two postartis；After intercondylar box 111 connects two
Condyle.
Lateral femoral condyle prosthesis described in the present embodiment, including condyle of femur base body 110 and cam 120, pass through cam 120 and stock
The intercondylar box 111 of bone condyle base body 110 is rotatably connected, so that cam 120 can be with when column and cam 120 are in contact motion
Rolled relative to condyle of femur base body 110, friction between column and cam 120 can be made to change into rolling by sliding the sassafras that rubs and rubbed
Wipe, so as to reduce the abrasion of column and the contact site of cam 120 to a certain extent, improve column and cam 120
Service life, and then improve the service life of the artificial knee joint prosthesis with column Yu cam 120.
In the prior art, column generally use polythene material, column are chronically at the situation of sliding friction with cam 120
Under, column is easy to wear, so as to cause the service life reduction of artificial knee joint prosthesis.Lateral femoral condyle prosthesis described in the present embodiment is created
Property cam 120 is designed as movable, reduce column and cam 120 by changing the friction mode of column and cam 120
The abrasion of contact site, improve the service life of column and cam 120.
In the alternative of the present embodiment, the lateral femoral condyle prosthesis includes connector 130；Axial direction of the cam 120 along itself
It is provided with cam through hole 121；Alternatively, the axis of cam through hole 121 overlaps with the axis of cam 120, in order to cam 120 around
The axis of itself rotates, the rolling being easy between column and cam 120.
Connector 130 and the grafting of cam through hole 121, and the both ends of connector 130 are connected with intercondylar box 111 respectively.Namely
Cam 120 is rotatably connected with intercondylar box 111 by connector 130.By connector 130, it is easy to cam 120 being arranged on condyle
Between in box 111, to simplify the structure of lateral femoral condyle prosthesis.
Wherein, cam 120 is rotatably connected with intercondylar box 111 by connector 130, such as cam 120 and can be connected
Fitting 130 is rotatably connected, and connector 130 is rotatably connected with intercondylar box 111；
Or cam 120 is rotatably connected with connector 130, connector 130 is fixedly connected with intercondylar box 111；
Or cam 120 is fixedly connected with connector 130, connector 130 is rotatably connected with intercondylar box 111.
Shown in Figure 6, in the alternative of the present embodiment, connector 130 is provided with least two stopper slots 131, limit
Position groove 131 is located in intercondylar box 111.
At least one locating part 140 is connected with each stopper slot 131, cam is provided between two stopper slots 131
120；It should be noted that locating part 140 for example can be Sealing shield ring, limited post, limited block etc..
Intercondylar box 111 is provided with the intercondylar box connecting hole being connected with connector 130.
Along perpendicular to the axial direction of cam 120, the maximum length of locating part 140 is more than the maximum length of cam through hole 121, and
The maximum length of locating part 140 is more than the maximum length of intercondylar box connecting hole；So that locating part 140 can limit connector 130
Relative to axial movement of the intercondylar box 111 along cam 120, cam 120 is arranged in intercondylar box 111.
Alternatively, the shape of connector 130 is in cylinder, prism or other shapes, and the shape of connector 130 also may be used
Think special-shaped shape.Alternatively, the shape of cam through hole 121 is corresponding to the shape of connector 130；If connector 130 is in cylinder
During body, cam through hole 121 is also in the corresponding cylindrical of size, and during 130 rectangular cylinder of connector, cam through hole 121 is also in
The corresponding rectangular cylinder of size.Alternatively, the shape of intercondylar box connecting hole is corresponding to the shape of connector 130；Such as connector 130
During in cylinder, intercondylar box connecting hole is also in the corresponding cylindrical of size, and during 130 rectangular cylinder of connector, intercondylar box connects
It is also in the corresponding rectangular cylinder of size to connect hole.
Alternatively, intercondylar box connecting hole is in cylinder, prism or other shapes, and the shape of intercondylar box connecting hole also may be used
Think special-shaped shape.
Alternatively, the shape of connector 130 is in cylinder, and the shape of cam through hole 121 is in corresponding cylinder, locating part
140 be Sealing shield ring；The sectional area of locating part 140 is more than the sectional area of cam through hole 121, and the sectional area of locating part 140 is more than
The sectional area of intercondylar box connecting hole；So that locating part 140 can limit connector 130 relative to intercondylar box 111 along cam 120
Axial movement, cam 120 is arranged in intercondylar box 111.
Alternatively, the stepped cylinder of connector 130；The part that connector 130 coordinates with cam through hole 121 it is straight
Footpath, the diameter of the part coordinated more than connector 130 and intercondylar box connecting hole；Wherein, connector 130 and intercondylar box connecting hole it
Between be provided with bearing.
In the alternative of the present embodiment, the both ends of connector 130 are respectively mounted by engaging bolts to be connected with intercondylar box 111；
So that connector 130 is fixed or rotatably relative to intercondylar box 111.
The screw head of attachment screw is located at the outside of intercondylar box 111.
Intercondylar box 111 is provided with the intercondylar box connecting hole being connected with connector 130.
Along perpendicular to the axial direction of cam 120, the sectional area of screw head is more than the sectional area of intercondylar box connecting hole.Pass through company
Screw is connect in order to which cam 120 is connected in intercondylar box 111.
In the alternative of the present embodiment, connected between intercondylar box 111 and/or cam 120, with connector 130 by bearing
Connect.That is, connected between intercondylar box 111 and connector 130 by bearing, or, between cam 120 and connector 130
Connected by bearing, or, connected between intercondylar box 111 and cam 120 and connector 130 by bearing.By bearing, with
The resistance that cam 120 rotates relative to intercondylar box 111 is reduced, and then reduces the rolling frictional resistance of column and cam 120.
In the alternative of the present embodiment, the material of condyle of femur base body 110 is vitallium, alumina-based ceramic or
Zirconia-based ceramics.
Alternatively, the material of cam 120 is vitallium, alumina-based ceramic or zirconia-based ceramics.
Alternatively, the material of connector 130 is vitallium, titanium alloy or stainless steel.
In the alternative of the present embodiment, the gap between cam 120 and intercondylar box 111 is 0.2mm-1mm；It is for example, convex
Gap between wheel 120 and intercondylar box 111 is 0.2mm, 0.3mm, 0.45mm, 0.6mm, 0.85mm, 0.9mm etc..
Alternatively, the gap between cam 120 and connector 130 is 0.05mm-0.2mm；For example, cam 120 is with being connected
Gap between part 130 is 0.05mm, 0.06mm, 0.08mm, 0.12mm, 0.16mm, 0.2mm etc..
Alternatively, surface roughness≤Ra0.1 of cam 120；To reduce the frictional resistance between column and cam 120.
Alternatively, surface roughness≤Ra0.1 of connector 130, when being in contact motion with cam 120 in order to column
Cam 120 can roll relative to condyle of femur base body 110.
Shown in Figure 7, in the alternative of the present embodiment, cam 120 is revolving body；I.e. cam 120 is 360 ° of axles pair
The revolving body of title.
Referring to shown in Fig. 8, Fig. 9, in the alternative of the present embodiment, cam 120 is non-revolved body, and non-revolved body is outer
Surface includes surface of revolution, and surface of revolution is close to the center of intercondylar box 111.Namely cam 120 is part revolving body, part non-time
Swivel.By surface of revolution close to the center of intercondylar box 111, so that column can form rolling friction with cam 120.
Embodiment two
Embodiment two provides a kind of artificial knee joint, and the embodiment includes the lateral femoral condyle prosthesis described in embodiment one, real
The technical characteristic for applying the lateral femoral condyle prosthesis disclosed in example one is also applied for the embodiment, one published lateral femoral condyle prosthesis of embodiment
Technical characteristic be not repeated to describe.
Figure 10 is the structural representation of the lateral femoral condyle prosthesis that the present embodiment provides and shin bone pad, and Figure 11 is lateral femoral condyle prosthesis
With the exploded perspective view of shin bone pad.
Referring to shown in Figure 10, Figure 11, with reference to shown in Fig. 1-Fig. 9, the artificial knee joint that the present embodiment provides includes condyle of femur
Prosthese 100, in addition to shin bone pad 200 and the column 210 being arranged on shin bone pad 200.Lateral femoral condyle prosthesis 100 includes femur
Condyle base body 110 and cam 120, it is rotatably connected by cam 120 and the intercondylar box 111 of condyle of femur base body 110, so that vertical
Cam 120 can roll relative to condyle of femur base body 110 when post 210 is in contact motion with cam 120, can make column
Friction between 210 and cam 120 changes into rolling friction by sliding the sassafras that rubs, so as to reduce column to a certain extent
210 with the abrasion of the contact site of cam 120, to improve the service life of artificial knee joint.
Artificial knee joint described in the present embodiment has the advantages of lateral femoral condyle prosthesis 100 described in embodiment one, embodiment one
The advantages of disclosed lateral femoral condyle prosthesis 100, is not repeated to describe herein.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a kind of lateral femoral condyle prosthesis, it is characterised in that including condyle of femur base body and cam；
The cam is arranged in the intercondylar box of the condyle of femur base body, and the cam rotatably connects with the intercondylar box
Connect.
2. lateral femoral condyle prosthesis according to claim 1, it is characterised in that including connector；Axle of the cam along itself
To being provided with cam through hole；
The connector and the cam through hole grafting, and the both ends of the connector are connected with the intercondylar box respectively.
3. lateral femoral condyle prosthesis according to claim 2, it is characterised in that it is spacing that the connector is provided with least two
Groove, the stopper slot are located in the intercondylar box；
At least one locating part is connected with each stopper slot, the cam is provided between two stopper slots；
The intercondylar box is provided with the intercondylar box connecting hole being connected with the connector；
Along perpendicular to the axial direction of the cam, the maximum length of the locating part is more than the maximum length of the cam through hole, and
The maximum length of the locating part is more than the maximum length of the intercondylar box connecting hole.
4. lateral femoral condyle prosthesis according to claim 2, it is characterised in that the both ends of the connector are respectively by connecting spiral shell
Nail is connected with the intercondylar box；The screw head of the attachment screw is located at the outside of the intercondylar box；
The intercondylar box is provided with the intercondylar box connecting hole being connected with the connector；
Along perpendicular to the axial direction of the cam, the sectional area of the screw head is more than the sectional area of the intercondylar box connecting hole.
5. lateral femoral condyle prosthesis according to claim 2, it is characterised in that the cam rotatably connects with the connector
Connect, the connector is rotatably connected with the intercondylar box；
Or the cam is rotatably connected with the connector, the connector is fixedly connected with the intercondylar box；
Or the cam is fixedly connected with the connector, the connector is rotatably connected with the intercondylar box.
6. lateral femoral condyle prosthesis according to claim 2, it is characterised in that the intercondylar box and/or the cam, it is and described
Connected between connector by bearing.
7. lateral femoral condyle prosthesis according to claim 2, it is characterised in that the material of the condyle of femur base body is cobalt chrome molybdenum
Alloy, alumina-based ceramic or zirconia-based ceramics；
The material of the cam is vitallium, alumina-based ceramic or zirconia-based ceramics；
The material of the connector is vitallium, titanium alloy or stainless steel.
8. lateral femoral condyle prosthesis according to claim 2, it is characterised in that the gap between the cam and the intercondylar box
For 0.2mm-1mm；
Gap between the cam and the connector is 0.05mm-0.2mm；
Surface roughness≤Ra0.1 of the cam；
Surface roughness≤Ra0.1 of the connector.
9. lateral femoral condyle prosthesis according to claim 1, it is characterised in that the cam is revolving body；
Or the cam is non-revolved body, and the outer surface of the non-revolved body includes surface of revolution, and the surface of revolution leans on
The center of the nearly intercondylar box.
10. a kind of artificial knee joint, it is characterised in that including the lateral femoral condyle prosthesis described in claim any one of 1-9.
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| CN205626207U (en) * | 2016-03-07 | 2016-10-12 | 天津妙娅生物科技有限公司 | Knee joint |
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| CN104125818A (en) * | 2012-02-17 | 2014-10-29 | 株式会社科麟泰 | Artificial knee joint |
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| CN107693166B (en) | 2024-01-12 |
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