CN201743800U - Femoral shaft middle-device - Google Patents
Femoral shaft middle-device Download PDFInfo
- Publication number
- CN201743800U CN201743800U CN2009203514020U CN200920351402U CN201743800U CN 201743800 U CN201743800 U CN 201743800U CN 2009203514020 U CN2009203514020 U CN 2009203514020U CN 200920351402 U CN200920351402 U CN 200920351402U CN 201743800 U CN201743800 U CN 201743800U
- Authority
- CN
- China
- Prior art keywords
- femoral stem
- mid
- femoral shaft
- femoral
- centre bore
- 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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Abstract
The utility model relates to a femoral shaft middle-device which includes a support wing, a central hole, a tail end and a clamping salient. The central hole is a little larger than the tail end of a femoral shaft which preserves a space for the settlement of the femoral shaft after being loaded. The clamping salient is arranged on the central hole which can prevent bone cement from entering during surgery, and can simultaneously clamp the tail end of the femoral shaft, and can not fall off from the tail end of the femoral shaft during surgical implantation.
Description
Technical field
A kind of implanting prosthetic of using when this utility model relates to the bone surgery artificial hip joint replacing refers to place the femoral stem far-end especially when the bone-cement type femoral stem is adopted in the artificial hip joint operation, makes femoral stem place the mid-device of femoral stem of femoral bone cavitas medullaris entad.
Background technology
The mid-device of femoral stem is to adopt the bone-cement type femoral stem to carry out the accessory commonly used of artificial hip joint replacing, and purpose is the center that femoral stem is fixed on pulp cavity, makes bone cement thickness even and femur is stressed evenly.Earlier the mid-device of femoral stem is enclosed within on the femoral stem body during operation, then femoral stem is implanted and filled with the pulp cavity of not solidified bone cement and be inserted into the precalculated position, treat that bone cement solidifies the back femoral stem and will be fixed in the paracentral position of pulp cavity; But the patient bears a heavy burden and can find when carrying out functional rehabilitation that femoral stem still can produce sinking trend to a certain degree owing to elastic properties of materials, assemblage gap or the like factor after surgery; Owing to traditional implantation mode makes the direct contact bone cement of femoral stem far-end not have the space that sinks, therefore can cause and still can produce small becoming flexible in the bone cement of femoral stem around being coated on, this long term to femoral stem is stable to be totally unfavorable.
The utility model content
The purpose of this utility model is for the postoperative femoral stem sinking problem that solves the mid-device existence of existing femoral stem provides a kind of easy and simple to handle, and is fixing safe and reliable, the mid-device of femoral stem that allows femoral stem to sink on a small quantity.
For achieving the above object, the mid-device of this utility model femoral stem adopts following design:
The mid-device of a kind of femoral stem, it is characterized in that the mid-device of femoral stem central authorities are provided with centre bore, this center-hole diameter is slightly bigger than femoral stem distal diameter size, centre bore is provided with the clamping projection near the inwall in aperture, during operation after the femoral stem end is fit into the mid-device centre bore of femoral stem, this clamping projection is encircled clamping femoral stem end mid-device of femoral stem when preventing that operation from implanting and is separated with femoral stem and come off, this clamping projection can also effectively stop bone cement to enter centre bore simultaneously, center-hole diameter is than the big 0.1～10mm of diameter of femoral stem end, about 1～the 15mm of normal depth that the centre bore degree of depth is installed greater than femoral stem, reserved the space for the sinking in femoral stem later stage, the mid-device outer setting of femoral stem has braced wing, braced wing can make mid-device of femoral stem and femoral stem remain on the femoral bone cavitas medullaris center with guarantee bone cement be evenly distributed in the femoral stem body around.
The mid-device of this utility model femoral stem is characterized in that the mid-device of this femoral stem made by the macromolecular materials such as medical polyethylene of human implantable.
The utility model has the advantages that:
1, the centre bore that is provided with of the mid-device of femoral stem central authorities can be femoral stem and reserved enough spaces in the sinking campaign that is produced at a specified future date in after operation, and is loosening because of sinking to producing to prevent femoral stem.
2, the mid-device of femoral stem outside is distributed with 3～12 braced wings, and this braced wing can be supported on after being inserted into femoral bone cavitas medullaris on the pulp cavity inwall to keep leaving 0.5～10mm space hold bone cement between femoral stem and the pulp cavity inwall.
Description of drawings
Accompanying drawing 1 is the perspective view of a kind of centerbody of this utility model
Accompanying drawing 2 is the cross-sectional view of a kind of centerbody of this utility model
Accompanying drawing 3 is this utility model user mode sketch map
The specific embodiment
Be described in further details below in conjunction with the concrete enforcement of accompanying drawing the mid-device of a kind of femoral stem of this utility model.
As accompanying drawing 1,2, shown in 3, the mid-device of a kind of femoral stem of this utility model, it comprises: braced wing (1), centre bore (2), terminal (3), clamping projection (4), the outside dimension of braced wing (1) can have plurality of specifications to adapt to the pulp cavity internal diameter of different human body femur, braced wing (1) is in order to be supported on the femoral bone cavitas medullaris wall, the position occupy the femoral bone cavitas medullaris center after guaranteeing femoral stem implantation pulp cavity, centre bore (2) diameter is than the big 0.1～10mm of diameter of femoral stem end (5), about 1～the 15mm of normal depth that centre bore (2) degree of depth is installed greater than femoral stem, reserve a small amount of sinking requisite space that femoral stem can take place because of heavy burden, clamping projection (4) exceeds 0.1～5mm in order to clamp femoral stem end (5) than centre bore (2) inwall, the mid-device of femoral stem separates with femoral stem and comes off when preventing that operation from implanting, stop bone cement to enter simultaneously and fill the sinking space of reserving, guarantee permanently effective the fixing of femoral stem.The mid-device of femoral stem is made by the medical macromolecular materials of human implantable.
Claims (2)
1. the mid-device of femoral stem is characterized in that it comprises: braced wing (1), centre bore (2), terminal (3), clamping projection (4); Centre bore (2) diameter is than the big 0.1～10mm of diameter of femoral stem end (5), the big 1～15mm of normal depth when centre bore (2) depth ratio femoral stem end (5) is installed, and clamping projection (4) exceeds 0.1～5mm than centre bore (2) inwall.
2. the mid-device of femoral stem according to claim 1 is characterized in that, the mid-device of this femoral stem adopts the medical macromolecular materials of human implantable to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203514020U CN201743800U (en) | 2009-12-31 | 2009-12-31 | Femoral shaft middle-device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203514020U CN201743800U (en) | 2009-12-31 | 2009-12-31 | Femoral shaft middle-device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201743800U true CN201743800U (en) | 2011-02-16 |
Family
ID=43578472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203514020U Expired - Lifetime CN201743800U (en) | 2009-12-31 | 2009-12-31 | Femoral shaft middle-device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201743800U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105640670A (en) * | 2016-03-22 | 2016-06-08 | 创生医疗器械（中国）有限公司 | Biological fixation-type hip joint dilator |
| CN106420118A (en) * | 2016-11-24 | 2017-02-22 | 北京科仪邦恩医疗器械科技有限公司 | Rotation preventing type spacer and hip joint prosthesis containing spacer |
| CN107951598A (en) * | 2017-11-06 | 2018-04-24 | 北京爱康宜诚医疗器材有限公司 | Interlayer prosthese and there is its type femoral bone end prosthesis component |
| CN107951599A (en) * | 2017-11-06 | 2018-04-24 | 北京爱康宜诚医疗器材有限公司 | Type femoral bone end prosthesis component |
| CN112190369A (en) * | 2020-10-13 | 2021-01-08 | 北京中安泰华科技有限公司 | Closed guide type femoral stem |
| CN112386373A (en) * | 2020-11-26 | 2021-02-23 | 北京爱康宜诚医疗器材有限公司 | Intramedullary fusion device and femoral prosthesis component with same |
-
2009
- 2009-12-31 CN CN2009203514020U patent/CN201743800U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105640670A (en) * | 2016-03-22 | 2016-06-08 | 创生医疗器械（中国）有限公司 | Biological fixation-type hip joint dilator |
| CN106420118A (en) * | 2016-11-24 | 2017-02-22 | 北京科仪邦恩医疗器械科技有限公司 | Rotation preventing type spacer and hip joint prosthesis containing spacer |
| CN107951598A (en) * | 2017-11-06 | 2018-04-24 | 北京爱康宜诚医疗器材有限公司 | Interlayer prosthese and there is its type femoral bone end prosthesis component |
| CN107951599A (en) * | 2017-11-06 | 2018-04-24 | 北京爱康宜诚医疗器材有限公司 | Type femoral bone end prosthesis component |
| CN107951599B (en) * | 2017-11-06 | 2020-05-29 | 北京爱康宜诚医疗器材有限公司 | Femoral stem prosthesis assembly |
| CN112190369A (en) * | 2020-10-13 | 2021-01-08 | 北京中安泰华科技有限公司 | Closed guide type femoral stem |
| CN112386373A (en) * | 2020-11-26 | 2021-02-23 | 北京爱康宜诚医疗器材有限公司 | Intramedullary fusion device and femoral prosthesis component with same |
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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: 20110216 |
|
| CX01 | Expiry of patent term |