CN201861737U - Far-end multi-groove type intramedullary extension rod - Google Patents
Far-end multi-groove type intramedullary extension rod Download PDFInfo
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- CN201861737U CN201861737U CN2010205326029U CN201020532602U CN201861737U CN 201861737 U CN201861737 U CN 201861737U CN 2010205326029 U CN2010205326029 U CN 2010205326029U CN 201020532602 U CN201020532602 U CN 201020532602U CN 201861737 U CN201861737 U CN 201861737U
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- extension rod
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- groove type
- groove
- knee
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Abstract
The utility model discloses a far-end multi-groove type intramedullary extension rod, comprising a main body. Two ends of the main body are respectively set into a thread shape and a multi-groove shape; a thread end is connected with a knee-joint prosthesis; and an elastic handle end is inserted into a medullary cavity and is combined with bone cement. When the far-end multi-groove type intramedullary extension rod is inserted into the medullary cavity, due to the design of an elastic groove, the resistance of contact between the extension rod and a cortical bone of a human body is furthest reduced, and pain of a thigh of a patient is reduced; also due to multi-groove type design, the middle of the extension rod can contain the bone cement and form a firm whole body with the bone cement, the stability of prosthesis reconstruction in the knee-joint restoration and replacement surgery is guaranteed. The far-end multi-groove type intramedullary extension rod is simple in structure and low in manufacturing cost, and has good application and market prospect.
Description
Technical field
This utility model relates to extension rod in a kind of far-end multiple groove marrow, and specifically a kind of bone-cement type that is used for is overhauled the type replacement knee in arthroplasty, is applicable to the interior extension rod of marrow of various pulp cavity shapes more.
Background technology
In recent years, total knee arthroplasty is used crowd's rejuvenation day by day, and As time goes on, first metathetical prosthese will inevitably be failed because of the constraint in service life.Therefore, knee joint is overhauled the also just increase thereupon of quantity of replacement operation.And overhaul in the replacement operation in knee joint, extension rod can make prosthese be fixed in the backbone in the marrow, part reduces the stress of damaged metaphysis of bone or heteroplastic transplantation bone, but physiological ground conducts to pulp cavity with joint or surperficial stress, and reconstruction of stability is played key effect.Because of the design rationalization of extension rod in a little marrows, becoming influences the key factor that knee joint is overhauled the replacement operation effect.
At present, being used for complete knee joint overhauls in the marrow of replacement operation extension rod and adopts the screw-type connection more being connected of knee-joint prosthesis, the extension rod body design mostly is right cylinder type or the single camber type of lengthening formula, when extension rod screws in knee-joint prosthesis in marrow, cause the uncertainty of distal direction easily, if the orientation is incorrect in the operation installation process, can cause diseases such as patient upper leg pain.
So need design at present a kind of can be not limited to setting angle, easy for installation, be beneficial to doctor operation, the knee joint that can at utmost reduce patient's misery is overhauled replacement and is satisfied this requirement with extension rod in the marrow, thereby guarantees the reconstruction of stability of knee joint revision procedure.
The utility model content
The purpose of this utility model provides and a kind ofly guarantees that knee joint is overhauled and can adapt to different pulp cavity shapes in the replacement operation, can guarantee extension rod in the far-end multiple groove marrow of reconstruction of stability again.
For achieving the above object, this utility model is taked following technical scheme:
Extension rod in a kind of far-end multiple groove marrow, wherein it includes a main body, and this main body one end is screw-like, is used for being connected with knee-joint prosthesis; One end is the multiple groove design, and groove quantity is 3-8, inserts pulp cavity.
Extension rod in the above-mentioned far-end multiple groove marrow, wherein: the screw thread of an end is connected with knee-joint prosthesis.
Extension rod in the above-mentioned far-end multiple groove marrow, wherein: an end is a plurality of elasticity grooveds designs, and groove quantity is 3-8, inserts behind the pulp cavity because of its elastic reaction is applicable to various pulp cavity shapes, and can engage with bone cement and be used for the prosthese reconstruction of stability jointly.
The beneficial effects of the utility model are:
Far-end multiple groove structural design of the present utility model makes it have certain elasticity.When extension rod being connected back implantation pulp cavity with knee-joint prosthesis, because of the human body bone structure is the natural torsion shape, and because of individual variation flexibility and direction all have difference, so extension rod can come in contact with human body pulp cavity cortical bone, if conflict power is big, will cause the patient that the phenomenon of big skelalgia takes place.The design of a plurality of elastic grooves of extension rod far-end in the far-end multiple groove marrow of the present utility model, when with human body cortical bone generation resistance after, far-end can significantly reduce the existence of this species resistance because of elastic existence, can reduce the generation of this ailing phenomenon to the full extent.In addition, the design of far-end multiple-grooved makes extension rod and bone cement to combine better, forms globality and connects, and plays important effect for prosthesis stability.
This utility model design concept advanced person, simple in structure, the elastic principle that makes full use of structure on the one hand reduces the generation of the big skelalgia disease of patient; On the other hand, utilize the fluting gap fully to combine, strengthened the stability of prosthese in human body with bone cement.So overhauling in knee joint, this utility model has good application and market prospect in the replacement operation.
Below in conjunction with the drawings and specific embodiments this utility model is described in further details, present embodiment only is this utility model preferred forms, is not to qualification of the present utility model.
Description of drawings
Fig. 1 is a structure embodiment sketch map front view of the present utility model;
Fig. 2 is a structure embodiment sketch map right view of the present utility model;
Fig. 3 is a schematic three dimensional views of the present utility model.
The specific embodiment
As shown in Figure 1: extension rod in a kind of far-end multiple groove marrow, wherein it includes a main body 1, and this main body 1 left end is set to screw-like 2, is connected with knee-joint prosthesis; Right-hand member is that a plurality of elastic grooves 3 are provided with, and produces elastic reaction when inserting in the pulp cavity, is applicable to the various bendings of pulp cavity.
Extension rod in the above-mentioned far-end multiple groove marrow, wherein, described remote design is a plurality of elastic grooves 3, can reduce the resistance with the human body cortical bone to the full extent, reduces the generation of the big skelalgia disease of patient.
Extension rod in the above-mentioned far-end multiple groove marrow, wherein, described remote design is a plurality of elastic grooves 3, can fully combine with bone cement, increases prosthesis stability.
Claims (3)
1. extension rod in the far-end multiple groove marrow, it is characterized in that: it includes a main body (1), and these main body two ends are respectively arranged with screw thread (2) and elastic groove (3).
2. extension rod in the far-end multiple groove marrow according to claim 1, it is characterized in that: far-end has a plurality of elastic grooves (3).
3. extension rod in the far-end multiple groove marrow according to claim 1, it is characterized in that: elastic groove (3) groove quantity is 3-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205326029U CN201861737U (en) | 2010-09-17 | 2010-09-17 | Far-end multi-groove type intramedullary extension rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205326029U CN201861737U (en) | 2010-09-17 | 2010-09-17 | Far-end multi-groove type intramedullary extension rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201861737U true CN201861737U (en) | 2011-06-15 |
Family
ID=44132905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205326029U Expired - Lifetime CN201861737U (en) | 2010-09-17 | 2010-09-17 | Far-end multi-groove type intramedullary extension rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201861737U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105902308A (en) * | 2016-04-11 | 2016-08-31 | 河南省洛阳正骨医院河南省骨科医院 | Novel tibia intramedullary fastening nail |
-
2010
- 2010-09-17 CN CN2010205326029U patent/CN201861737U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105902308A (en) * | 2016-04-11 | 2016-08-31 | 河南省洛阳正骨医院河南省骨科医院 | Novel tibia intramedullary fastening nail |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110615 |