CN205339219U - Joint prosthesis - Google Patents
Joint prosthesis Download PDFInfo
- Publication number
- CN205339219U CN205339219U CN201521018939.7U CN201521018939U CN205339219U CN 205339219 U CN205339219 U CN 205339219U CN 201521018939 U CN201521018939 U CN 201521018939U CN 205339219 U CN205339219 U CN 205339219U
- Authority
- CN
- China
- Prior art keywords
- main backbone
- artificial joint
- body part
- connector
- column
- 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 - Fee Related
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Abstract
The utility model discloses a joint prosthesis, include: body part, deformable portion, body part and deformable portion fixed connection, the body part is located main key upper end including emulation joint and main backbone, emulation joint, main backbone is that main backbone is equipped with outside convex connector with the mode fretwork that runs through from top to bottom, be equipped with the check valve in the main backbone, and the check valve is located the below of connector, the opening part of connector is equipped with internal thread or external screw thread, deformable portion is equipped with the column jacket with main key intercommunication, column jacket upper end opening, the lower extreme seals. The utility model provides a joint prosthesis, deformable portion inserts the pulp cavity and need not to expand the marrow with the form of compression diameter, or only needs the limited marrow that expands of near -end for operation technique is convenient.
Description
Technical field
This utility model relates to armarium, is specifically related to a kind of artificial joint.
Background technology
When there is joint pathological changes in patient, such as femur head necrosis, it is necessary to by installing artificial joint to repair the mobility at patient articular place.Under for femur, the mounting means of the artificial joint of prior art is illustrated, shown in Figure 1, first greater trochanter (i.e. greater trochanter) is excised, then expand marrow in incision, then the afterbody of artificial joint is inserted in pulp cavity, finally inject bone cement and load fixing.Its shortcoming is: complicated operation, and operating time is long, it is necessary to expanding marrow and easily cause bone cracking, fill bone cement and make bone cement stay in human body, patient is existed potential danger by its composition.
Utility model content
In order to solve the problems referred to above, the purpose of this utility model be in that to provide a kind of prevent bone cracking, without bone cement, the artificial joint that easy to operate, operating time is short.
In order to achieve the above object, this utility model have employed techniques below scheme:
A kind of artificial joint, has the feature that, including: body part, crushed element, described body part is fixing with crushed element to be connected；Described body part includes emulation joint and main backbone, and emulation joint is positioned at main key upper end；Described main backbone is hollow out in the way of running through up and down, and main key inner side is provided with connector；The opening part of described connector is provided with female thread；It is additionally provided with check valve in described main backbone, and described check valve is positioned at the lower section of connector；Described crushed element is provided with the column jecket connected with main backbone, described column jecket upper end open, lower end closed；The lateral surface of described column jecket is provided with outwardly lateral column, and at ambient pressure, column jecket folds to contract with cross-wise direction, and during by high pressure, column jecket outwards launches with cross-wise direction, drives lateral column to launch simultaneously, and after cancelling pressure, still keeps deployed condition.
Further, in the artificial joint that this utility model provides, it is also possible to have a feature in that described lateral column is symmetrical set, and lateral column exists interval each other.
Further, in the artificial joint that this utility model provides, it is also possible to have a feature in that described crushed element lower end has tapering, and the diameter of bottom face is minimum.
Further, in the artificial joint that this utility model provides, it is also possible to have a feature in that the outer layer of described artificial joint is also coated with aluminium oxide ceramics, zirconia ceramics, hydroxyapatite, titanium alloy, one of them coating of metal tantalum.
This utility model has the advantages that on the basis of the above:
The artificial joint that this utility model provides, crushed element inserts pulp cavity without expanding marrow with the form of compression diameter, or only needs near-end Limited Reamed so that operation technique is convenient；
The individual variation that all kinds of patient's pulp cavity exists can be met, as long as the sectional area of pulp cavity is less than the maximum secting area after crushed element expansion, lateral column and pulp cavity inwall can tight docile, make stress be uniformly distributed in whole backbone, do not have stress and concentrate cause key to ftracture；
Space between lateral column contributes to reducing the rising that during plug pin, marrow is intrinsic pressure, and owing to not expanding marrow, the destruction of blood fortune in marrow is minimized, greatly reduces the risk of fat embolism；
It addition, the design of symmetrical lateral column also strengthens the anti-rotation performance of artificial joint so that it is fixing more stable.
Accompanying drawing explanation
Fig. 1 is the scheme of installation of the artificial joint of prior art；
Fig. 2 is structural representation of the present utility model；
Its schematic cross-section when Fig. 3 is column jecket contraction；
Its schematic cross-section when Fig. 4 is column jecket expansion；
Fig. 5 is that this utility model uses view.
Detailed description of the invention
For the technological means making this utility model realize, creation characteristic, reaching purpose and effect and be easy to understand, the artificial joint that this utility model is provided by following example in conjunction with accompanying drawing is specifically addressed.
As in figure 2 it is shown, the artificial joint that the present embodiment provides includes body part 1, crushed element 2, body part 1 lower end is fixedly connected crushed element 2.
Concrete, described body part 1 includes emulation joint 11 and main key 12, the joint that emulation joint 11 is after death excised in order to replace disease to degenerate；Main key 12 is hollow out in the way of running through up and down, and main backbone is provided with connector 121, and the inner chamber of connector is provided with female thread, in order to convenient and outside compression pump is connected；In the inside of main key 12 hollow outs and be connected with check valve 122 near connector 121, the flow direction of water during to control compression pump water filling, and the crushed element demand to pressure can be met；
Described crushed element 2 is provided with and the column jecket 21 of the main key 12 upper end open lower end closed connected, the lateral surface of described column jecket 21 is arranged with four outwardly lateral columns 22, there is gap in lateral column 22, shown in Fig. 3, Fig. 4, at ambient pressure each other, column jecket 21 folds to contract with cross-wise direction, during by high pressure, column jecket 21 outwards launches with cross-wise direction, drives lateral column 22 to launch simultaneously, and after cancelling pressure, column jecket 21 and lateral column 22 still keep deployed condition.
Described crushed element 2 bottom has certain taper, facilitates and inserts exactly in pulp cavity bottom crushed element 2.
Preferably, the outer layer of artificial joint of the present utility model is also coated with aluminium oxide ceramics, zirconia ceramics, hydroxyapatite, titanium alloy, one of them coating of metal tantalum so that artificial joint has better medical effect.
Using method of the present utility model is shown in Figure 5:
S1. first excise the joint of pathological changes, expose pulp cavity opening, it is ensured that pulp cavity diameter is slightly larger than crushed element diameter；
S2. artificial joint crushed element of the present utility model is inserted pulp cavity, owing to its tail end is conical design, so can alignment pulp cavity opening accurate, easy；
S3. utilize the external compression pump 3 of water main, from one-way cock by compression pump 3 saline injection, to pressure meet time, the folding shrinking column jecket of crushed element launches in marrow, and after maintaining suitable pressure, four lateral columns are close to pulp cavity inwall；
S4. closing presure pump 3, lateral column keeps deployed condition, completes artificial joint fixing in pulp cavity.
The actual effect of artificial joint of the present utility model:
Crushed element inserts pulp cavity without expanding marrow with the form of compression diameter, or only needs near-end Limited Reamed so that operation technique is convenient；
The individual variation that all kinds of patient's pulp cavity exists can be met, as long as the sectional area of pulp cavity is less than the maximum secting area after crushed element expansion, lateral column and pulp cavity inwall can tight docile, make stress be uniformly distributed in whole backbone, do not have stress and concentrate cause key to ftracture；
Space between lateral column contributes to reducing the rising that during plug pin, marrow is intrinsic pressure, and owing to not expanding marrow, the destruction of blood fortune in marrow is minimized, greatly reduces the risk of fat embolism；
It addition, the design of symmetrical lateral column also strengthens the anti-rotation performance of artificial joint so that it is fixing more stable.
Artificial joint involved by certain this utility model is not merely defined in the structure in embodiment, any equivalent modifications that this utility model is carried out and replacement also all in category of the present utility model.
Claims (4)
1. an artificial joint, it is characterised in that including: body part (1), crushed element (2), described body part (1) is fixing with crushed element (2) to be connected；
Described body part (1) includes emulation joint (11) and main backbone (12), and emulation joint (11) is positioned at main backbone (12) upper end；
Described main backbone (12) is hollow out in the way of running through up and down, and main backbone (12) inner side is provided with connector (121)；
The inner chamber of described connector (121) is provided with female thread；
It is additionally provided with check valve (122) in described main backbone (12), and described check valve (122) is positioned at the lower section of connector (121)；
Described crushed element (2) is provided with the column jecket (21) connected with main backbone (12),
Described column jecket (21) upper end open, lower end closed；
The lateral surface of described column jecket (21) is provided with some outwardly lateral columns (22), at ambient pressure, column jecket (21) folds to contract with cross-wise direction, during by high pressure, column jecket (21) outwards launches with cross-wise direction, drive lateral column (22) to launch simultaneously, and after cancelling pressure, still keep deployed condition.
2. artificial joint according to claim 1, it is characterised in that: described lateral column (22) is symmetrical set, and lateral column (22) exists interval each other.
3. artificial joint according to claim 1, it is characterised in that: described crushed element (2) lower end has tapering, and the diameter of bottom face is minimum.
4. artificial joint according to claim 1, it is characterised in that: the outer layer of described artificial joint is also coated with aluminium oxide ceramics, zirconia ceramics, hydroxyapatite, titanium alloy, one of them coating of metal tantalum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521018939.7U CN205339219U (en) | 2015-12-09 | 2015-12-09 | Joint prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521018939.7U CN205339219U (en) | 2015-12-09 | 2015-12-09 | Joint prosthesis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205339219U true CN205339219U (en) | 2016-06-29 |
Family
ID=56151995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521018939.7U Expired - Fee Related CN205339219U (en) | 2015-12-09 | 2015-12-09 | Joint prosthesis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205339219U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105326584A (en) * | 2015-12-09 | 2016-02-17 | 上海市第一人民医院 | Artificial joint |
-
2015
- 2015-12-09 CN CN201521018939.7U patent/CN205339219U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105326584A (en) * | 2015-12-09 | 2016-02-17 | 上海市第一人民医院 | Artificial joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160629 Termination date: 20161209 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |