CN107280823A - Patellar prosthesis and artificial knee joint - Google Patents
Patellar prosthesis and artificial knee joint Download PDFInfo
- Publication number
- CN107280823A CN107280823A CN201710652146.8A CN201710652146A CN107280823A CN 107280823 A CN107280823 A CN 107280823A CN 201710652146 A CN201710652146 A CN 201710652146A CN 107280823 A CN107280823 A CN 107280823A
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- Prior art keywords
- rotor
- kneecap
- face
- patellar prosthesis
- top cover
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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
- A61F2/3877—Patellae or trochleae
-
- 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
- A61F2002/30108—Shapes
- A61F2002/30199—Three-dimensional shapes
- A61F2002/30205—Three-dimensional shapes conical
-
- 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
- A61F2002/30108—Shapes
- A61F2002/30199—Three-dimensional shapes
- A61F2002/30224—Three-dimensional shapes cylindrical
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00017—Iron- or Fe-based alloys, e.g. stainless steel
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00029—Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00035—Other metals or alloys
- A61F2310/00101—Molybdenum or Mo-based alloys
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00179—Ceramics or ceramic-like structures
- A61F2310/00185—Ceramics or ceramic-like structures based on metal oxides
- A61F2310/00239—Ceramics or ceramic-like structures based on metal oxides containing zirconia or zirconium oxide ZrO2
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 patellar prosthesis and artificial knee joint.The patellar prosthesis, including prosthetic main, rotor and kneecap fixture；The prosthetic main has corresponding the first face and the second face；First face is provided with the body recess being connected with the rotor, and second face is connected with the kneecap fixture；The body recess can prevent the rotor from departing from the prosthetic main；The rotor protrudes from first face, and the rotor can be rotated around the axis of itself.The artificial knee joint includes described patellar prosthesis.It is an object of the invention to provide patellar prosthesis and artificial knee joint, to solve the technical problem of patellar prosthesis serious wear present in prior art.
Description
Technical field
The present invention relates to technical field of medical instruments, more particularly to a kind of patellar prosthesis and artificial knee joint.
Background technology
Artificial knee joint prosthesis is implanted in human body through knee prosthesis is postoperative, and it is to recover human normal that it, which is acted on,
Physiological function.Enter line replacement for the kneecap of regression serious wear and received by everybody, the design of market mainstream knee-joint prosthesis
The matching of kneecap stock prosthese has been substantially envisaged, long and wide pulley stile is provided with front of femoral prosthesis.As kneecap is put
Change the extensive application of art, the key factor for being designed to influence artificial knee replacement surgery's effect of patellar prosthesis.
At present, the design of patellar prosthesis is generally the overall fixed or fixed form of assembling, and this kind of patellar prosthesis has one
The top of individual arc, is fixed on kneecap by way of bone cement or biological coating.The patellar prosthesis of this quasi-tradition is set
Meter form so that the friction pair that patellar prosthesis is constituted with lateral femoral condyle prosthesis is constantly in during knee joint flexion and extension
Sliding friction state, and contact position concentrated on fixed region, and over time, the region just occurs seriously
Abrasion, so as to directly affects the service life of overall knee-joint prosthesis.
In order to extend the service life of knee-joint prosthesis, farthest the abrasion of reduction patellar prosthesis, must just make kneecap
Bone prosthese is chronically in a kind of rational Frotteurism with the friction pair that lateral femoral condyle prosthesis is constituted.
Therefore, the application provides a kind of new patellar prosthesis and artificial knee joint regarding to the issue above, false to reduce kneecap
The abrasion of body.
The content of the invention
It is an object of the invention to provide patellar prosthesis, to solve patellar prosthesis serious wear present in prior art
Technical problem.
It is tight to solve the abrasion of patellar prosthesis present in prior art the present invention also aims to provide artificial knee joint
The technical problem of weight.
The patellar prosthesis provided based on above-mentioned first purpose, the present invention, including prosthetic main, rotor and kneecap are fixed
Part；
The prosthetic main has corresponding the first face and the second face；First face is provided with matches somebody with somebody with the rotor
The body recess of connection is closed, second face is connected with the kneecap fixture；
The body recess can prevent the rotor from departing from the prosthetic main；The rotor protrudes from described
Simultaneously, and the rotor can around itself axis rotate.
Further, the prosthetic main includes top cover and kneecap support；The top cover is fixedly connected with the kneecap support；
First face is one side of the top cover away from the kneecap support, and second face is the kneecap support away from institute
State the one side of top cover；
The body recess is provided with the top cover, the rotor is connected with the kneecap support.
Further, the rotor is connected with the kneecap support by rolling element；The rotor and/or the kneecap
Support is provided with the rolling groove coordinated with the rolling element；
Or, the rotor is connected with the kneecap support by bearing.
Further, the rotor depends on the one of the nearly rotor close to the one side of the kneecap support, the kneecap
The surface for the inner peripheral surface that outer peripheral face that face, the rotor coordinate with the top cover, the top cover coordinate with the rotor is thick
Rugosity Ra scope is：Ra≤1.5μm.
Further, the rotor is connected with the top cover using cone match；The cone angle A of conical surface scope
For：5°≤A≤45°.
Further, first face is spherical spherical crown or spheroid shape spherical crown；The rotor and the one-sided smooth
Transition is connected；
The radius of the spherical spherical crown is 15mm-45mm, and the major radius of the spheroid shape spherical crown is 25mm-45mm, ellipsoid
The short radius of type spherical crown is 15mm-35mm.
Further, the quantity of the kneecap fixture is multiple；Multiple kneecap fixtures are centrosymmetric setting,
And be uniformly fixed on second face；
The kneecap fixture is one kind in stud, cylinder, circular cone post, triangular prism, rectangular column, five side columns or hexagonal column
Or it is a variety of.
Further, the kneecap fixture is integrally formed with the kneecap support；The top cover and the kneecap support pass through
Connector is dismantled and assembled to be fixedly connected；
The top cover and the kneecap support are provided with prosthese connecting hole corresponding with the connector；
The connector be stud, cylinder, circular cone post, triangular prism, rectangular column, five side columns or one kind in hexagonal column or
It is a variety of.
Further, the material of the top cover is vitallium, ultra-high molecular weight polyethylene, alumina-based ceramic or oxygen
Change zirconia-based ceramic；
The material of the kneecap support is stainless steel, ultra-high molecular weight polyethylene, vitallium or titanium alloy；
The material of the rotor is vitallium, ultra-high molecular weight polyethylene, alumina-based ceramic or oxidation zirconium base
Ceramics；
The material of the connector is titanium alloy or stainless steel.
The artificial knee joint provided based on above-mentioned second purpose, the present invention, including described patellar prosthesis.
Beneficial effects of the present invention：
The patellar prosthesis that the present invention is provided, including prosthetic main, rotor and kneecap fixture, by being set in prosthetic main
The body recess being connected with rotor is put, and body recess can prevent rotor from departing from prosthetic main, and rotor
It can be rotated around the axis of itself, so that patellar prosthesis keeps connecing by rotor with human normal condyle of femur or lateral femoral condyle prosthesis
Touch, so that patellar prosthesis is rolling friction with the friction pair that human normal condyle of femur or lateral femoral condyle prosthesis are constituted, greatly reduction
The abrasion of patellar prosthesis, extends the service life of knee-joint prosthesis.
The artificial knee joint that the present invention is provided, including patellar prosthesis, can reduce the abrasion of patellar prosthesis, can extend knee
The service life of articular prosthesis.
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 accompanying drawing used required in embodiment or description of the prior art is briefly described, 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 explosive view for the patellar prosthesis that the embodiment of the present invention one is provided；
Fig. 2 is the explosive view for another angle of patellar prosthesis that the embodiment of the present invention one is provided；
Fig. 3 is the first angle structural representation for the patellar prosthesis that the embodiment of the present invention one is provided；
Fig. 4 is the left sectional view of the patellar prosthesis shown in Fig. 3；
Fig. 5 is the schematic diagram for not showing rotor of the patellar prosthesis shown in Fig. 4；
Fig. 6 is the top view of the patellar prosthesis shown in Fig. 3；
Fig. 7 is the upward view of the patellar prosthesis shown in Fig. 3；
Fig. 8 is the second angle structural representation for the patellar prosthesis that the embodiment of the present invention one is provided；
Fig. 9 is the third angle structural representation for the patellar prosthesis that the embodiment of the present invention one is provided；
Figure 10 is the dimensional structure diagram of the rotor for the patellar prosthesis that the embodiment of the present invention one is provided；
Figure 11 is the front view of the rotor for the patellar prosthesis that the embodiment of the present invention one is provided；
Figure 12 is the dimensional structure diagram of the kneecap support for the patellar prosthesis that the embodiment of the present invention one is provided；
Figure 13 is the front view of the kneecap support for the patellar prosthesis that the embodiment of the present invention one is provided.
Icon：100- prosthetic mains；The faces of 110- first；The faces of 120- second；130- body recess；140- top covers；150- kneecaps
Bone support；160- connectors；170- prosthese connecting holes；200- rotors；300- kneecap fixtures；400- rolling elements；410- is rolled
Groove.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is a part of embodiment of the 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 indicate 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 indicating or implying 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 to 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-Figure 13, a kind of patellar prosthesis is present embodiments provided；What Fig. 1 and Fig. 2 provided for the present embodiment
The explosive view at two visual angles of patellar prosthesis；The first angle structural representation for the patellar prosthesis that Fig. 3 provides for the present embodiment,
The front view of patellar prosthesis is can be understood as, Fig. 4 is left sectional view, and Fig. 6 is top view；Fig. 7 is upward view；In order to clearer
Display structure, Fig. 5 be Fig. 4 shown in patellar prosthesis the schematic diagram for not showing rotor；Fig. 8 and Fig. 9 carry for the present embodiment
The dimensional structure diagram of two angles of the patellar prosthesis of confession；The stereochemical structure for the rotor that Figure 10 provides for the present embodiment is shown
It is intended to, Figure 11 is the front view of rotor；The dimensional structure diagram for the kneecap support that Figure 12 provides for the present embodiment, Figure 13 is kneecap
The front view of bone support.
Referring to shown in Fig. 1-Figure 13, the patellar prosthesis that the present embodiment is provided, including prosthetic main 100, rotor 200 and kneecap
Bone fixation means 300.
Prosthetic main 100 has corresponding the first face 110 and the second face 120.
Prosthetic main 100 is provided with the body recess 130 being connected with rotor 200；Alternatively, the first face 110 is set
It is equipped with the body recess 130 being connected with rotor 200.
Alternatively, the second face 120 is connected with kneecap fixture 300.By kneecap fixture 300, patellar prosthesis is consolidated
It is scheduled on the kneecap of human body, for example, patellar prosthesis is integrally attached to kneecap by way of bone cement or biological coating
On.
Body recess 130 can prevent rotor 200 from departing from prosthetic main 100；Namely rotor 200 is when rotating, no
It can be dropped from prosthetic main 100.Body recess 130 can prevent rotor 200 depart from prosthetic main 100 structure include but
The body recess 130 for being not limited to rotor 200 and prosthetic main 100 is provided with the position limiting structure of mutual cooperation, prosthetic main 100
The notch of body recess 130 be provided with baffle ring for preventing rotor 200 from departing from, rotor 200 and prosthetic main 100
Body recess 130 using cone match, cambered surface coordinate etc..
Rotor 200 protrudes from the first face 110, and rotor 200 can be rotated around the axis of itself.Pass through rotor
200 protrude from the first face 110, so that rotor 200 is contacted with human normal condyle of femur or lateral femoral condyle prosthesis.Rotor 200
Such as can be round estrade, similar round estrade, billiard table body；Alternatively, rotor 200 is round estrade.Alternatively, rotor
200 can rotate 45 degree of -360 degree around the axis of itself；Alternatively, rotor 200 can rotate 360 degree around the axis of itself.
Patellar prosthesis described in the present embodiment, including prosthetic main 100, rotor 200 and kneecap fixture 300, pass through
The body recess 130 being connected with rotor 200 is set in prosthetic main 100, and body recess 130 can prevent rotor
200 depart from prosthetic main 100, and rotor 200 can be rotated around the axis of itself, so that patellar prosthesis passes through rotor
200 keep contacting with human normal condyle of femur or lateral femoral condyle prosthesis, so that patellar prosthesis and human normal condyle of femur or condyle of femur
The friction pair that prosthese is constituted is rolling friction, greatly reduces the abrasion of patellar prosthesis, extends the use of knee-joint prosthesis
Life-span.
It was found from physical knowledge, the abrasion of rolling friction is substantially less than sliding friction；Patellar prosthesis described in the present embodiment
The design principle of rolling friction is employed, replaces the mentality of designing of traditional sliding friction, by the indoor design one of patellar prosthesis
The rotor 200 that can be freely rotated along own axes, during knee joint flexion and extension, the rotor on patellar prosthesis
200 remain with human normal condyle of femur or lateral femoral condyle prosthesis and contact, and with the difference of contact position, rotor 200 is therewith
It is free to rotate, for example freely rotate 360 °, it is ensured that patellar prosthesis is chronically in a kind of motion state of low abrasion, so that
The significant service life for improving knee-joint prosthesis.Simultaneously as patellar prosthesis is in the state of low abrasion all the time, exist originally
Postoperative the triggered kneecap complication of Traditional Man knee prosthesis, such as patellar subluxation and pain before dislocation, kneecap loosening and knee
It will also be decreased etc. phenomenon, so that the quality of life of patient is greatly improved.
Referring to shown in Fig. 1-Fig. 9, in the alternative of the present embodiment, prosthetic main 100 includes top cover 140 and kneecap support
150。
Top cover 140 is fixedly connected with kneecap support 150.
First face 110 is one side of the top cover 140 away from kneecap support 150, and the second face 120 is kneecap support 150 away from top cover 140
One side.Prosthetic main 100 is designed as top cover 140 and the two parts of kneecap support 150, by separable assembled form, is easy to turn
Kinetoplast 200 is installed and is connected in prosthetic main 100.
Alternatively, body recess 130 is provided with top cover 140, rotor 200 is connected with kneecap support 150.That is, main body
Groove 130 runs through top cover 140, and the plane of rotation of rotor 200 is connected with top cover 140, bottom surface and the kneecap support 150 of rotor 200
Connection, the top surface of rotor 200 is connected with the first face 110.
Rotated for the ease of rotor 200, rotor 200 is connected with kneecap support 150 by rolling element 400；By rolling
Body 400, to reduce friction of the rotor 200 in rotation between rotor 200 and kneecap support 150, so that rotor 200 exists
Rotate more flexible in prosthetic main 100, reduce further the abrasion of patellar prosthesis, extend the use longevity of knee-joint prosthesis
Life.Alternatively, the quantity of rolling element 400 is multiple, and such as quantity of rolling element 400 is 6-20, such as number of rolling element 400
Measure as 6,8,9,10,12,15 etc..
Patellar prosthesis described in the present embodiment, by rotor 200 and rolling element 400, using rolling friction+thrust bearing
Design principle, replace the mentality of designing of traditional sliding friction, greatly reduce the abrasion of patellar prosthesis, significantly improve
The service life of knee-joint prosthesis.
Referring to shown in Figure 10-Figure 13, further, rotor 200 and/or kneecap support 150 are provided with and matched somebody with somebody with rolling element 400
The rolling groove 410 of conjunction；That is, rotor 200 is provided with the rolling groove 410 coordinated with rolling element 400, or, kneecap support
150 are provided with the rolling groove 410 coordinated with rolling element 400, or, rotor 200 and kneecap support 150 are provided with and rolled
The rolling groove 410 that body 400 coordinates.By rolling groove 410, so that rolling element 400 is preferably rolled.Alternatively, rotor
200 and kneecap support 150 be provided with rolling element 400 coordinate rolling groove 410.Alternatively, the rolling that rotor 200 is set
The section for the rolling groove 410 that groove 410, kneecap support 150 are set is semicircle；Alternatively, the rolling that rotor 200 is set
The diameter for the rolling groove 410 that the diameter of groove 410, kneecap support 150 are set is identical with the diameter of rolling element 400；The diameter model
It for example can be 1mm-4mm to enclose, and the diameter can be for example 1mm, 1.5mm, 2mm, 2.2mm, 3mm, 3.5mm etc..Alternatively,
Rolling element 400 is paved with rolling groove 410 substantially；Further, in order to ensure to set in good rolling effect, rolling groove 410
It is equipped with the rolling support for connecting rolling element 400.Alternatively, rolling element 400 is using spheroid, cylinder, cone etc..
It will be appreciated by persons skilled in the art that rotor 200 can also be connected with kneecap support 150 by bearing, with
Reduce friction of the rotor 200 when rotating between rotor 200 and kneecap support 150.
In the alternative of the present embodiment, rotor 200 is close to the one side of kneecap support 150, kneecap support 150 close to rotor
Outer peripheral face, top cover 140 and the inner peripheral surface of the cooperation of rotor 200 that 200 one side, rotor 200 and top cover 140 coordinates are described
The important frictional interface of patellar prosthesis.For example, after patellar prosthesis is implanted into human body, rotor 200 will be with human normal femur
There is contact and rub in condyle or lateral femoral condyle prosthesis, therefore rotor 200 is important frictional interface close to the one side of kneecap support 150；
Meanwhile, with the motion of kneecap, rotor 200 is rotated according to contact position in the presence of eccentric load, rotation it is same
When coordinate in kneecap support 150 close to the one side of rotor 200, rotor 200 with top cover 140 outer peripheral face, top cover 140 is with rotating
The inner peripheral surface that body 200 coordinates can also form friction, therefore these contact surfaces are also important frictional interface.
Alternatively, rotor 200 is close to the scope of the surface roughness Ra of the one side of kneecap support 150：Ra≤1.5μm.
Alternatively, kneecap support 150 is close to the scope of the surface roughness Ra of the one side of rotor 200：Ra≤0.1μm.
Preferably, kneecap support 150 is close to the scope of the surface roughness Ra of the one side of rotor 200：Ra≤1.5μm.
Alternatively, the scope of the surface roughness Ra for the outer peripheral face that rotor 200 coordinates with top cover 140 is：Ra≤1.5μ
m。
Alternatively, the scope of the surface roughness Ra for the inner peripheral surface that top cover 140 coordinates with rotor 200 is：Ra≤1.5μ
m。
In the alternative of the present embodiment, rotor 200 is connected with top cover 140 using cone match；Alternatively, rotor
200 conical surfaces coordinated with top cover 140, and top cover 140 are identical with the cone angle for the conical surface that rotor 200 coordinates.By using the conical surface
Coordinate, so that rotor 200 can not depart from top cover 140, and then so that rotor 200 can not depart from prosthetic main 100.
Alternatively, the cone angle A of conical surface scope is：5°≤A≤45°.Cone angle A for example can for 5 °, 10 °, 18 °, 35 °,
38 °, 45 ° etc..
Alternatively, rotor 200 is arranged at intervals with top cover 140；Namely the conical surface that rotor 200 coordinates with top cover 140, and
Top cover 140 is arranged at intervals with the conical surface that rotor 200 coordinates, to reduce or avoid the rotor 200 when rotating of rotor 200
With the friction between top cover 140.Alternatively, the gap between rotor 200 and top cover 140 is 0.01mm-0.08mm.It is preferred that
Ground, the gap between rotor 200 and top cover 140 is 0.01mm-0.05mm.
In the alternative of the present embodiment, the first face 110 is curved surface；Alternatively, the first face 110 is symmetroid or non-
Symmetroid；Preferably, the first face 110 is spherical spherical crown or spheroid shape spherical crown；Namely top cover 140 away from kneecap support 150 one
Face is spherical spherical crown or spheroid shape spherical crown；During knee joint flexion and extension, to reduce or avoid what patellar prosthesis was caused
The discomfort and pain of human body.
Alternatively, the radius of spherical spherical crown is 15mm-45mm；Preferably, the radius of spherical spherical crown is 20mm-40mm.Can
Selection of land, the radius of spherical spherical crown is more than or equal to the radius of rotor 200.
Alternatively, the major radius of spheroid shape spherical crown is 25mm-45mm, and the short radius of spheroid shape spherical crown is 15mm-35mm.Can
Selection of land, the short radius of spheroid shape spherical crown is more than the radius of rotor 200.
Alternatively, rotor 200 smoothly transits with the first face 110 and is connected, with further in knee joint flexion and extension process
In, reduce or avoid the discomfort and pain for the human body that patellar prosthesis causes.Alternatively, rotor 200 is used with the first face 110
Same design parameter, to realize relatively perfect dock.Preferably, the face 110 of rotor 200 and first is using curvature identical circle
Cambered surface.
In the alternative of the present embodiment, the quantity of kneecap fixture 300 is multiple；The quantity example of kneecap fixture 300
Can be such as 2-10, such as 2,3,6,8.
Alternatively, multiple kneecap fixtures 300 are centrosymmetric setting, and are uniformly fixed on the second face 120；It is optional
Ground, kneecap fixture 300 is integrally formed with kneecap support 150.
Alternatively, kneecap fixture 300 is in stud, cylinder, circular cone post, triangular prism, rectangular column, five side columns or hexagonal column
One or more；Kneecap fixture 300 can also be other shapes.Alternatively, the cross sectional shape of kneecap fixture 300 is
When circular, its diameter is preferably 4mm-8mm；Alternatively, the cross sectional shape of kneecap fixture 300 is shape than circular
When, the areal extent in its section is 12mm2-25mm2。
In the alternative of the present embodiment, top cover 140 is fixedly connected with kneecap support 150 by the way that connector 160 is dismantled and assembled；Can
Selection of land, the quantity of connector 160 is multiple；The quantity of connector 160 for example can be 2-10, such as 2,3,6,8
Etc..Alternatively, multiple connectors 160 are centrosymmetric setting.
Alternatively, connector 160 is arranged at intervals with kneecap fixture 300, non-interference.
Alternatively, top cover 140 and kneecap support 150 are provided with prosthese connecting hole 170 corresponding with connector 160；It is preferred that
Ground, the shape of prosthese connecting hole 170 can use screw thread and unthreaded hole.Alternatively, screwed hole is metric thread or inch screw thread；When
When prosthese connecting hole 170 is designed using metric thread, screw thread nominal diameter is 1.5mm-5mm；When prosthese connecting hole 170 uses English
During Design of Screw Thread processed, screw thread nominal diameter is 0.059inch-0.197inch.Alternatively, when the cross sectional shape of prosthese connecting hole 170
During for circle, its a diameter of 1.5mm-5mm；Alternatively, when the cross sectional shape of prosthese connecting hole 170 is shape than circular
When, the average area in the section of prosthese connecting hole 170 is 1.5mm2-20mm2。
Alternatively, connector 160 is one in stud, cylinder, circular cone post, triangular prism, rectangular column, five side columns or hexagonal column
Plant or a variety of；Connector 160 can also be other shapes.The quantity of prosthese connecting hole 170 and the quantity phase of connector 160
Should；The shape of prosthese connecting hole 170 is corresponding to the shape of connector 160.Alternatively, the prosthese of connector 160 and top cover 140 connects
Hole 170 is connect for threaded connection and/or is interference fitted, connector 160 and the prosthese connecting hole 170 of kneecap support 150 are matched somebody with somebody for small―gap suture
Close, to ensure the running clearance of rotor 200 and body recess 130.
In the alternative of the present embodiment, the material of top cover 140 is vitallium, ultra-high molecular weight polyethylene, oxidation
Al-base ceramic or zirconia-based ceramics.Alternatively, the top cover that vitallium material or superhigh molecular weight polyethylene material are made
140 use traditional numerical control machine-shaping, and ordinary measring tool is that detection can be achieved；Alternatively, alumina-based ceramic material or oxidation
The top cover 140 that zirconia-based ceramic material is made is using isostatic pressed compacting → roughing shaping → sintering → finishing grinding → polishing
Processing mode is molded, and ordinary measring tool is that inspection can be achieved；So that top cover 140 is without in any design, production and processing and detection
Difficulty.
Alternatively, the material of kneecap support 150 is stainless steel, ultra-high molecular weight polyethylene, vitallium or titanium alloy；Can
Selection of land, the kneecap support 150 that stainless steel, ultra-high molecular weight polyethylene, vitallium or titanium alloy material are made is using traditional
Numerical control machine-shaping, ordinary measring tool is that detection can be achieved；So that kneecap support 150 is without any design, production and processing and detects
On difficulty.
Alternatively, the material of rotor 200 is vitallium, ultra-high molecular weight polyethylene, alumina-based ceramic or oxygen
Change zirconia-based ceramic；Alternatively, the rotor 200 that vitallium material or superhigh molecular weight polyethylene material are made is using tradition
Numerical control machine-shaping, ordinary measring tool be can be achieved detection；Alternatively, alumina-based ceramic material or zirconia-based ceramics material
The rotor 200 that is made using isostatic pressed compacting → roughing shaping → sintering → finishing grinding → polishing processing mode into
Type, ordinary measring tool is that inspection can be achieved；So that rotor 200 is without the difficulty in any design, production and processing and detection.
Alternatively, the material of connector 160 is titanium alloy or stainless steel.Alternatively, stainless steel or titanium alloy material are made
Connector 160 use traditional numerical control machine-shaping, ordinary measring tool be can be achieved detection；Appoint so that connector 160 does not have
Difficulty in what design, production and processing and detection.
Alternatively, the material of rolling element 400 is vitallium, ultra-high molecular weight polyethylene, alumina-based ceramic or oxygen
Change zirconia-based ceramic；Alternatively, the rolling element 400 that vitallium material or superhigh molecular weight polyethylene material are made is using tradition
Numerical control machine-shaping, ordinary measring tool be can be achieved detection；Alternatively, alumina-based ceramic material or zirconia-based ceramics material
The rolling element 400 that is made using isostatic pressed compacting → roughing shaping → sintering → finishing grinding → polishing processing mode into
Type, ordinary measring tool is that inspection can be achieved；So that rolling element 400 is without the difficulty in any design, production and processing and detection.
Alternatively, top cover 140, kneecap support 150, rotor 200, connector 160, kneecap fixture 300, rolling element 400
Deng material can be with identical, can also be different.
It should be noted that in total knee replacement, special operating theater instruments need to be used to carry out kneecap osteotomy behaviour
Make, in order to ensure all installation and fit precision.
Embodiment two
Embodiment two provides a kind of artificial knee joint, and the embodiment includes the patellar prosthesis described in embodiment one, implements
The technical characteristic of patellar prosthesis disclosed in example one is also applied for the embodiment, the technology of the published patellar prosthesis of embodiment one
Description is not repeated in feature.
The artificial knee joint that the present embodiment is provided, including patellar prosthesis.The kneecap fixture of patellar prosthesis can pass through bone
Patellar prosthesis is fixed on the kneecap by osteotomy of human body by the mode of cement or biological coating.
Artificial knee joint described in the present embodiment is made up of patellar prosthesis and human normal condyle of femur or lateral femoral condyle prosthesis
Rolling friction pair, greatly to reduce the abrasion of patellar prosthesis, to extend the service life of knee-joint prosthesis；The artificial knee is closed
Section has the advantages that patellar prosthesis described in embodiment one, and the advantage of the patellar prosthesis disclosed in embodiment one is no longer weighed herein
Multiple description.
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, or 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 patellar prosthesis, it is characterised in that including prosthetic main, rotor and kneecap fixture；
The prosthetic main has corresponding the first face and the second face；First face, which is provided with to coordinate with the rotor, to be connected
The body recess connect, second face is connected with the kneecap fixture；
The body recess can prevent the rotor from departing from the prosthetic main；The rotor protrudes from described first
Face, and the rotor can be around the axis rotation of itself.
2. patellar prosthesis according to claim 1, it is characterised in that the prosthetic main includes top cover and kneecap support；Institute
Top cover is stated to be fixedly connected with the kneecap support；
First face is one side of the top cover away from the kneecap support, and second face is the kneecap support away from the top
The one side of lid；
The body recess is provided with the top cover, the rotor is connected with the kneecap support.
3. patellar prosthesis according to claim 2, it is characterised in that the rotor passes through rolling element with the kneecap support
Connection；The rotor and/or the kneecap support are provided with the rolling groove coordinated with the rolling element；
Or, the rotor is connected with the kneecap support by bearing.
4. patellar prosthesis according to claim 3, it is characterised in that the rotor close to the kneecap support one side,
The kneecap depends on the one side of the nearly rotor, the rotor coordinates with the top cover outer peripheral face, the top cover and institute
The scope of surface roughness Ra for stating the inner peripheral surface of rotor cooperation is：Ra≤1.5μm.
5. patellar prosthesis according to claim 2, it is characterised in that the rotor uses cone match with the top cover
Connection；The cone angle A of conical surface scope is：5°≤A≤45°.
6. patellar prosthesis according to claim 1, it is characterised in that first face is spherical spherical crown or spheroid shape ball
Hat；The rotor smoothly transits with first face and is connected；
The radius of the spherical spherical crown is 15mm-45mm, and the major radius of the spheroid shape spherical crown is 25mm-45mm, spheroid shape ball
The short radius of hat is 15mm-35mm.
7. patellar prosthesis according to claim 1, it is characterised in that the quantity of the kneecap fixture is multiple；It is multiple
The kneecap fixture is centrosymmetric setting, and is uniformly fixed on second face；
The kneecap fixture be stud, cylinder, circular cone post, triangular prism, rectangular column, five side columns or one kind in hexagonal column or
It is a variety of.
8. patellar prosthesis according to claim 2, it is characterised in that the kneecap fixture and kneecap support one into
Type；The top cover is fixedly connected with the kneecap support by the way that connector is dismantled and assembled；
The top cover and the kneecap support are provided with prosthese connecting hole corresponding with the connector；
The connector is a kind of or many in stud, cylinder, circular cone post, triangular prism, rectangular column, five side columns or hexagonal column
Kind.
9. patellar prosthesis according to claim 2, it is characterised in that the material of the top cover is vitallium, superelevation
Molecular weight polyethylene, alumina-based ceramic or zirconia-based ceramics；
The material of the kneecap support is stainless steel, ultra-high molecular weight polyethylene, vitallium or titanium alloy；
The material of the rotor is vitallium, ultra-high molecular weight polyethylene, alumina-based ceramic or zirconia-based ceramics；
The material of the connector is titanium alloy or stainless steel.
10. a kind of artificial knee joint, it is characterised in that including the patellar prosthesis described in claim any one of 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710652146.8A CN107280823B (en) | 2017-08-02 | 2017-08-02 | Patella Prosthesis and Artificial Knee Joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710652146.8A CN107280823B (en) | 2017-08-02 | 2017-08-02 | Patella Prosthesis and Artificial Knee Joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107280823A true CN107280823A (en) | 2017-10-24 |
| CN107280823B CN107280823B (en) | 2023-09-05 |
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ID=60104291
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710652146.8A Active CN107280823B (en) | 2017-08-02 | 2017-08-02 | Patella Prosthesis and Artificial Knee Joint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115944435A (en) * | 2023-03-14 | 2023-04-11 | 北京爱康宜诚医疗器材有限公司 | Patella prosthesis |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1527498A (en) * | 1974-11-29 | 1978-10-04 | Gaia M | Hip joint prosthesis |
| FR2700260A1 (en) * | 1993-01-08 | 1994-07-13 | Bouvet Jean Claude | Artificial patella component for knee prosthesis |
| US5514183A (en) * | 1994-12-20 | 1996-05-07 | Epstein; Norman | Reduced friction prosthetic knee joint utilizing replaceable roller bearings |
| CN1229084C (en) * | 2000-01-30 | 2005-11-30 | 岱密克龙有限公司 | Component for prosthetic joint having diamond load bearing and articulation surface |
| CN101484085A (en) * | 2006-04-07 | 2009-07-15 | 德普伊国际有限公司 | Patella tracking |
-
2017
- 2017-08-02 CN CN201710652146.8A patent/CN107280823B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1527498A (en) * | 1974-11-29 | 1978-10-04 | Gaia M | Hip joint prosthesis |
| FR2700260A1 (en) * | 1993-01-08 | 1994-07-13 | Bouvet Jean Claude | Artificial patella component for knee prosthesis |
| US5514183A (en) * | 1994-12-20 | 1996-05-07 | Epstein; Norman | Reduced friction prosthetic knee joint utilizing replaceable roller bearings |
| CN1229084C (en) * | 2000-01-30 | 2005-11-30 | 岱密克龙有限公司 | Component for prosthetic joint having diamond load bearing and articulation surface |
| CN101484085A (en) * | 2006-04-07 | 2009-07-15 | 德普伊国际有限公司 | Patella tracking |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115944435A (en) * | 2023-03-14 | 2023-04-11 | 北京爱康宜诚医疗器材有限公司 | Patella prosthesis |
| CN115944435B (en) * | 2023-03-14 | 2023-07-14 | 北京爱康宜诚医疗器材有限公司 | Patella prosthesis |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107280823B (en) | 2023-09-05 |
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