CN202313811U - Prosthesis of knee joint - Google Patents
Prosthesis of knee joint Download PDFInfo
- Publication number
- CN202313811U CN202313811U CN 201120462409 CN201120462409U CN202313811U CN 202313811 U CN202313811 U CN 202313811U CN 201120462409 CN201120462409 CN 201120462409 CN 201120462409 U CN201120462409 U CN 201120462409U CN 202313811 U CN202313811 U CN 202313811U
- Authority
- CN
- China
- Prior art keywords
- side guide
- component
- platform
- liner component
- liner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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
-
- 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
Abstract
The utility model relates to a prosthesis of a knee joint. The prosthesis of the knee joint is provided with a liner component and a tibia component platform, wherein the prosthesis of a knee joint can be locked with the tibia component platform; the bottom of the liner component is provided with a side guide structure, a front fixing wall structure and a rear fixing structure; and the tibia component platform is provided with a side guide structure adapting to the liner component, a front baffle wall structure and a rear side guide structure. According to the utility model, the liner component can be locked on the tibia component platform stably, and the liner component can be implanted into the tibia component platform at a small angle, so that the implanted opening required when the liner component is implanted is reduced, and the operation is more convenient.
Description
Technical field
This utility model relates to a kind of artificial knee joint prosthesis, especially relates to a kind of latch-up structure of artificial knee joint prosthesis fixed platform.
Background technology
Present fixed platform full knee joint transposing prosthesis; The sealed of liner component and tibial component platform is to form holddown groove through the edge contour along the tibial component platform; Front and back at liner component reach sealed purpose through Elastic buckle and holddown groove are set, and this kind locking mode causes the displacement between liner component and tibial component platform easily.And because the setting of holddown groove, liner component normally is implanted on the tibial component platform with vertical direction when implanting this tibial component platform, is the operation purpose, and need a bigger implant angle this moment, causes thus and implant the big defective of opening.
Therefore, be badly in need of to propose a kind of liner component and can stablize and be locked together on the tibial component platform, and can implant the knee-joint prosthesis of tibial component platform with smaller angle.
The utility model content
The purpose of this utility model is to provide a kind of knee-joint prosthesis, and its liner component can be stablized and is locked together on the tibial component platform.
Another purpose of this utility model is to provide a kind of knee-joint prosthesis, and its liner component can also be implanted the tibial component platform with smaller angle.
For realizing above-mentioned purpose, this utility model provides a kind of knee-joint prosthesis, has liner component and tibial component platform, and the bottom of said liner component has side guide frame, preceding fixed wall and back fixed structure.The top of said tibial component platform has side guide frame, front wall and the back fixed structure that adapts with liner component.The side guide frame of tibial component platform matches with the side guide frame of liner component, can guide liner component to be installed to from front to back on the tibial component platform.And after liner component was installed on the tibial component platform, the preceding fixed wall of liner component engaged with the back fixed structure with the front wall of tibial component platform respectively with the back fixed structure, thereby liner component is fixed on the tibial component platform.
According to above-mentioned design, the side guide frame of liner component is the side guide edge of protrusion, and the side guide frame of tibial component platform is a side guide securement groove; Perhaps, the side guide frame of liner component is a side guide securement groove, and the side guide frame of tibial component platform is the side guide edge of protrusion.
According to above-mentioned design, the back fixed structure of liner component is the back fixed wall, and the back fixed structure of tibial component platform is the back retaining wall; Perhaps, the back fixed structure of liner component is the back fixed edge of protrusion, and the back fixed structure of tibial component platform is the back holddown groove.
According to above-mentioned design, the side guide frame of liner component and the side guide frame of tibial component platform are from back to front and are inclined upwardly.
According to above-mentioned design, the angle of this inclination is the 0-10 degree, is preferably the 0.5-5 degree.
According to above-mentioned design, the front wall of said tibial component platform is a whole retaining wall, is perhaps formed by the discontinuous retaining wall of a plurality of segmentations, perhaps is spring liftable retaining wall.
According to above-mentioned design, the back fixed structure of said liner component and the back fixed structure of said tibial component platform are an integral body, are perhaps formed by a plurality of segmentation discontinuous constructions.
According to above-mentioned design, the side guide frame of liner component is positioned at the two bottom sides or the middle part of liner component, and the side guide frame of tibial component platform is positioned at the corresponding position of side guide frame with liner component.
According to above-mentioned design, the front portion of liner component has installing hole.
Than prior art, the useful technique effect of the knee-joint prosthesis of this utility model comprises:
1. the side guide frame on the side guide frame bottom liner component, preceding fixed wall and back fixed structure and tibial component platform top, front wall and back fixed structure cooperatively interacts; Not only limited the displacement all around of liner component; Prevent the rotation of liner component on the tibial component platform; Contact locking around can realizing; And the whole contact area between liner component and the tibial component platform reaches maximum, thereby liner component can more stably be locked together on the tibial component platform.
2. through the side guide frame of liner component and tibial component platform, make liner component implant the tibial component platform, reduced implantation opening required when liner component is implanted with littler angle, more convenient to operate.
Description of drawings
Fig. 1 is the liner component of this utility model and the decomposing schematic representation that cooperates of tibial component platform;
Fig. 2 is the axonometric chart of the tibial component platform of this utility model;
Fig. 3 is the vertical view of the tibial component platform of this utility model;
Fig. 4 is the partial enlarged drawing of the tibial component platform medial surface of this utility model;
Fig. 5 is the side schematic view of the liner component of this utility model;
Fig. 6 is the front view of the liner component of this utility model;
Fig. 7 is the upward view of the liner component of this utility model.
Wherein, description of reference numerals is following:
The specific embodiment
Below in conjunction with accompanying drawing, the knee-joint prosthesis of this utility model is elaborated." preceding ", " back " direction alleged in this utility model are consistent with the fore-and-aft direction of the later human body of said knee-joint prosthesis implant into body.
As shown in Figure 1, the knee-joint prosthesis of this utility model comprises liner component 1 and tibial component platform 2.Liner component 1 wherein is fixed on the tibial component platform 2, and liner component 1 can be locked on the tibial component platform 2 relative motion between restriction liner component 1 and the tibial component platform 2.
To shown in Figure 4, tibial component platform 2 tops of this utility model have side guide frame, front wall 8 and back fixed structure like Fig. 2, and the bottom of tibial component platform 2 also has tibia implant post 10 and positioning element 9.In the present embodiment, the side guide frame of tibial component platform 2 is preferably side guide securement groove 6 (as shown in Figure 2), and this side guide securement groove 6 is distributed in the both sides of tibial component platform 2.This side guide frame also can be the side guide edge of protrusion.
In the present embodiment; The side guide securement groove 6 of tibial component platform 2 further preferably has tiltedly straight guide frame, and also promptly, side guide securement groove 6 is with respect to the tibial component platform 2 minute angle α that is inclined upwardly from back to front; This minute angle α is the 0-10 degree, is preferably the 0.5-5 degree.The design of this tiltedly straight guide frame can guide liner component to be implanted in the tibial component platform better, and help on above-below direction, playing certain firm effect.The side guide securement groove 6 of tibial component platform 2 also can be arranged to level.
In the present embodiment, the front wall 8 of tibial component platform 2 is a whole retaining wall.Front wall 8 also can be to be formed by the discontinuous retaining wall of a plurality of segmentations, perhaps is spring liftable form retaining wall.
In the present embodiment, the back fixed structure of tibial component platform 2 is preferably back holddown groove 7, can be the opening level U type groove forward or the groove structure of other analogous shapes well-known to those skilled in the art.This back fixed structure can also be the back retaining wall of similar front wall 8 forms.In addition, this back fixed structure can be global design or the discontinuous design of segmentation.
To shown in Figure 7, for matching with tibial component platform 2, liner component 1 bottom has side guide frame, preceding fixed wall 5 and back fixed structure like Fig. 5.
In the present embodiment, the side guide frame of liner component 1 is preferably the side guide edge 3 (referring to Fig. 6) of protrusion, to match with the side guide securement groove 6 of tibial component platform 2.In addition, when the side guide frame of tibial component platform 2 was the side guide edge of protrusion, this side guide frame also can be a side guide securement groove.Thus, the side guide frame through tibial component platform 2 matches with the side guide frame of liner component 1, thereby can guide liner component 1 to be installed to from front to back on the tibial component platform 2.And after liner component 1 was installed on the tibial component platform 2, the side guide frame of liner component 1 and the side guide frame of tibial component platform 2 matched, and can also play preventing liner component 1 move left and right, and the function that prevents liner component 1 rotation.
In the present embodiment; The side guide edge 3 of liner component 1 further also preferably has tiltedly straight guide frame; Also promptly, side guide edge 3 is inclined upwardly with respect to liner component 1 bottom from back to front, and this angle of inclination is consistent with the angle of inclination of the side gathering sill 6 of tibial component platform 2.When liner component 1 is installed to tibial component platform 2; Tiltedly directly being bonded to each other and guiding of guide frame of the tiltedly straight guide frame through side guide securement groove 6 and the side guide edge 3 of liner component 1; Just allow to implant mode liner component 1 is installed to tibial component platform 2 with small skew; Thereby reduced implantation opening required when liner component 1 is implanted greatly; The structural design of small skew can because the side guide frame of small skew forms a successive inclined surface, play good guiding effect when liner component 1 is implanted tibial component platform 2 simultaneously.Certainly, the side guide edge 3 of liner component 1 also can be arranged to level.
In the present embodiment; The back fixed structure of liner component 1 is preferably the back fixed edge 4 (referring to Fig. 5 and Fig. 7) of protrusion; To engage with the back holddown groove 7 of tibial component platform 2, the fit system of this back fixed edge 4 and back holddown groove 7 can strengthen the soundness (comprising the steadiness on the above-below direction) between liner component 1 and the tibial component platform 2 greatly.In addition, when the back fixed structure of tibial component platform 2 was the back retaining wall, the back fixed structure of liner component 1 also can be the back fixed wall.Thus, the preceding fixed wall 5 through liner component 1 engages with the back fixed structure with the front wall 8 of tibial component platform 2 respectively with the back fixed structure, and liner component 1 is fixed on the tibial component platform 2.In addition, the back fixed structure of liner component 1 can be global design or the discontinuous design of segmentation.
In addition, as shown in Figure 6, the front portion of the liner component 1 of this utility model has installing hole 11, and the quantity of installing hole 11 can be looked the complicated operation degree and decided, and is preferably two installing holes.In operation process, this installing hole 11 can be used as the structure that apparatus is got involved, and through apparatus being inserted installing hole 11, is convenient to the application of force and liner component 1 is pushed is installed in the tibial component platform 2, and also be beneficial to the later stage and overhaul.
The installation process of liner component 1 with the tibial component platform 2 of this utility model knee-joint prosthesis is described to specific embodiment shown in Figure 7 below in conjunction with Fig. 2.
After tibial component platform 2 is fixed in proximal tibia by tibia implant post 10 and positioning element 9; Apparatus is inserted the installing hole 11 of liner component 1; Make the side guide securement groove 6 of the side guide edge 3 aligning tibial component platforms 2 of liner component 1; So just can be by the guiding of side guide edge 3 and side guide securement groove 6, control liner component 1 pushes tibial component platform 2 from front to back gradually.Because tibial component platform 2 is generally metal material; Liner component 1 is generally superhigh molecular weight polyethylene material, so finally can be so that the back fixed edge of liner component 14 falls into fully and is fastened in the back holddown groove 7 and front wall 8 of tibial component platform 2 with preceding fixed wall 5.When liner component 1 be installed to fully tibial component platform 2 in place after; Can apparatus be taken out from the installing hole 11 of liner component 1; At this moment, the side guide edge 3 of liner component 1 engages with the side guide securement groove 6 of tibial component platform 2, and the preceding fixed wall of liner component 15 and back fixed edge 4 engage with back holddown groove 7 with the front wall 8 of tibial component platform 2 respectively; It is maximum that the whole contact area of liner component 1 and tibial component platform 2 reaches; Thereby liner component 1 can stably be fixed on the tibial component platform 2, and when knee joint was carried out flexion and extension, liner component 1 also can keep motionless with respect to tibial component platform 2.
The side guide frame of liner component 1 shown in this utility model the foregoing description and tibial component platform 2 all is to be positioned at both sides, but this utility model is not limited thereto.The position of the side guide frame of liner component 1 and tibial component platform 2 can be arranged at the middle part.When this side guide frame was positioned at the middle part of tibial component platform 2 and liner component 1, all the appropriate section with this utility model embodiment was identical for the combination of other structures and liner component 1 and tibial plateau parts 2.
Than prior art, the useful technique effect of the knee-joint prosthesis of this utility model comprises:
1. the side guide frame on the side guide frame through liner component 1 bottom, preceding fixed wall 5 and back fixed structure and tibial component platform 2 tops, front wall 8 and afterwards cooperatively interacting of fixed structure; Not only limited the displacement all around of liner component 1; Prevent the rotation of liner component 1 on tibial component platform 2; Contact locking around can realizing; And the whole contact area between liner component 1 and the tibial component platform 2 reaches maximum, thereby liner component 1 can more stably be locked together on the tibial component platform 2.
2. through the side guide frame of liner component 1 and tibial component platform 2, make liner component 1 implant the tibial component platform, reduced implantation opening required when liner component 1 is implanted with littler angle, more convenient to operate.
This utility model is intended to improve for the cooperation between tibial component platform and the liner component, and other building blocks of knee-joint prosthesis are identical with the prior art content, and this paper repeats no more, hereby explanation.
The above; Be merely the detailed description of this utility model preferred embodiment and graphic; The characteristic of this utility model is not limited thereto; All scopes of this utility model should be as the criterion with following scope, and all embodiment that accords with the spirit variation similar with it of this utility model claim protection domain all should be contained in the category of this utility model; Any those of ordinary skill in the art in the field of this utility model, can think easily and variation or the adjustment all can be encompassed in the claim protection domain of this utility model.
Claims (10)
1. a knee-joint prosthesis has liner component (1) and tibial component platform (2), it is characterized in that:
Said liner component (1) bottom has side guide frame, preceding fixed wall (5) and back fixed structure;
Said tibial component platform (2) top has side guide frame, front wall (8) and the back fixed structure that adapts with said liner component (1);
The side guide frame of said tibial component platform (2) matches with the side guide frame of said liner component (1), can guide said liner component (1) to be installed to from front to back on the said tibial component platform (2); And; After said liner component (1) is installed on the said tibial component platform (2); The preceding fixed wall (5) of said liner component (1) and back fixed structure engage with the front wall (8) and the back fixed structure of said tibial component platform (2) respectively, thereby said liner component (1) is fixed on the said tibial component platform (2).
2. knee-joint prosthesis as claimed in claim 1, wherein, the side guide frame of said liner component (1) is the side guide edge (3) of protrusion, the side guide frame of said tibial component platform (2) is a side guide securement groove (6);
Perhaps, the side guide frame of said liner component (1) is a side guide securement groove, and the side guide frame of said tibial component platform (2) is the side guide edge of protrusion.
3. knee-joint prosthesis as claimed in claim 1, wherein, the back fixed structure of said liner component (1) is the back fixed wall, the back fixed structure of said tibial component platform (2) is the back retaining wall;
Perhaps, the back fixed structure of said liner component (1) is the back fixed edge (4) of protrusion, and the back fixed structure of said tibial component platform (2) is a back holddown groove (7).
4. knee-joint prosthesis as claimed in claim 2, wherein, the side guide frame of the side guide frame of said liner component (1) and said tibial component platform (2) is from back to front and is inclined upwardly.
5. knee-joint prosthesis as claimed in claim 4, wherein, the angle of said inclination is the 0-10 degree.
6. knee-joint prosthesis as claimed in claim 5, wherein, the angle of said inclination is the 0.5-5 degree.
7. knee-joint prosthesis as claimed in claim 1, wherein, the front wall (8) of said tibial component platform (2) is a whole retaining wall, is perhaps formed by the discontinuous retaining wall of a plurality of segmentations, perhaps is spring liftable retaining wall.
8. knee-joint prosthesis as claimed in claim 1, wherein, the back fixed structure of the back fixed structure of said liner component (1) and said tibial component platform (2) is an integral body, is perhaps formed by a plurality of segmentation discontinuous constructions.
9. knee-joint prosthesis as claimed in claim 1; Wherein, The side guide frame of said liner component (1) is positioned at the two bottom sides or the middle part of said liner component (1), and the side guide frame of said tibial component platform (2) is positioned at the corresponding position of side guide frame with said liner component (1).
10. like arbitrary described knee-joint prosthesis among the claim 1-9, wherein, the front portion of said liner component (1) has installing hole (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120462409 CN202313811U (en) | 2011-11-18 | 2011-11-18 | Prosthesis of knee joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120462409 CN202313811U (en) | 2011-11-18 | 2011-11-18 | Prosthesis of knee joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202313811U true CN202313811U (en) | 2012-07-11 |
Family
ID=46425820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120462409 Expired - Lifetime CN202313811U (en) | 2011-11-18 | 2011-11-18 | Prosthesis of knee joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202313811U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013071872A1 (en) * | 2011-11-18 | 2013-05-23 | 北京纳通科技集团有限公司 | Knee joint prosthesis |
-
2011
- 2011-11-18 CN CN 201120462409 patent/CN202313811U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013071872A1 (en) * | 2011-11-18 | 2013-05-23 | 北京纳通科技集团有限公司 | Knee joint prosthesis |
| CN103120606A (en) * | 2011-11-18 | 2013-05-29 | 北京纳通科技集团有限公司 | Knee-joint prosthesis |
| CN103120606B (en) * | 2011-11-18 | 2015-03-18 | 北京纳通科技集团有限公司 | Knee-joint prosthesis |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120711 |
|
| CX01 | Expiry of patent term |