CN215019754U - Axial offset femoral stem - Google Patents
Axial offset femoral stem Download PDFInfo
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- CN215019754U CN215019754U CN202120311359.6U CN202120311359U CN215019754U CN 215019754 U CN215019754 U CN 215019754U CN 202120311359 U CN202120311359 U CN 202120311359U CN 215019754 U CN215019754 U CN 215019754U
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- femoral stem
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Abstract
The utility model provides an axis offset femoral stem, a femoral stem pyramid part, a femoral stem neck part and a femoral stem body; the femoral stem taper part is connected with the femoral stem body through the femoral stem neck part, wherein the angle between the central axis corresponding to the femoral stem body and the central axis corresponding to the femoral stem neck part is 125-145 degrees; the femoral stem comprises a femoral stem body and is characterized in that a fixing hole used for being connected with a femoral stem driver is arranged at the top of the femoral stem body, the shape of the fixing hole is matched with that of the femoral stem driver, the central axis of the fixing hole is parallel to the central axis of the femoral stem body, and the central axis of the fixing hole deviates 0.1-45 mm towards one side of the neck of the femoral stem. Through the axis of femoral stem handle body top fixed orifices with femoral stem handle body's axis parallel arrangement's design guarantees that implant operation process is convenient more high-efficient, guarantees that femoral stem prosthesis's implantation state is more accurate.
Description
Technical Field
The utility model relates to the technical field of medical machinery, especially, relate to an axis skew femoral stem.
Background
In the medical field, artificial hip replacement is widely used as a clinical treatment method. The artificial hip joint replacement is mainly to implant artificial hip joint prosthesis into the position of the hip joint of a human body through a hip joint installation device, thereby achieving the purpose of eliminating the pain of a patient. The hip joint prosthesis is used for replacing a hip joint of a human body, and the operation process comprises the following steps: the femoral stem with the axis offset is inserted into the femoral medullary cavity and is provided with the ball head and the acetabular cup arranged in the acetabulum, so that the function of the hip joint is realized.
In the prior art, the artificial axis is deviated from the femoral stem and the fixing hole of the femoral stem driver has no special requirement and is on the same straight line.
However, when the artificial axis deviates from the femoral stem in the implantation process, the femoral stem driver is not accurately driven into the femoral stem.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention has been developed to provide an axis offset femoral stem that overcomes or at least partially solves the above-mentioned problems.
The utility model discloses an axis offset femoral stem, which comprises a femoral stem pyramid part, a femoral stem neck part and a femoral stem body;
the femoral stem taper part is connected with the femoral stem body through the femoral stem neck part, and a preset angle is formed between a central axis corresponding to the femoral stem body and a central axis corresponding to the femoral stem neck part;
the femoral stem comprises a femoral stem body and is characterized in that a fixing hole used for being connected with a femoral stem driver is arranged at the top of the femoral stem body, the shape of the fixing hole is matched with that of the femoral stem driver, the central axis of the fixing hole is parallel to the central axis of the femoral stem body, and the central axis of the fixing hole deviates 0.1-45 mm towards one side of the neck of the femoral stem.
Preferably, the end of the femoral stem handle body close to the femoral stem neck is larger than the end far away from the femoral stem neck.
Preferably, the femoral stem taper and the femoral stem neck are in circular arc transition connection.
Preferably, the preset angle is 125 to 145 °.
Preferably, the femoral taper is conical.
Preferably, the outer surface of the femoral stem handle body is sprayed with a titanium coating and/or a hydroxyapatite coating and/or a sand coating.
The application has the following advantages:
in an embodiment of the present application, the femoral stem neck portion includes a femoral stem taper portion, a femoral stem neck portion, and a femoral stem body; the femoral stem taper part is connected with the femoral stem body through the femoral stem neck part, and a preset angle is formed between the central axis of the femoral stem body and the central axis of the femoral stem neck part; the femoral stem comprises a femoral stem body and is characterized in that a fixing hole used for being connected with a femoral stem driver is arranged at the top of the femoral stem body, the shape of the fixing hole is matched with that of the femoral stem driver, the central axis of the fixing hole is parallel to the central axis of the femoral stem body, and the central axis of the fixing hole deviates 0.1-45 mm towards one side of the neck of the femoral stem. Through the axis of femoral stem handle body top fixed orifices with femoral stem handle body's axis parallel arrangement's design guarantees that implant operation process is convenient more high-efficient, guarantees that femoral stem prosthesis's implantation state is more accurate.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings needed to be used in the description of the present application will be briefly introduced below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic cross-sectional view of an embodiment of an axial offset femoral stem according to the present invention;
1. a femoral stem taper; 2. a femoral stem neck; 3. a femoral stem body; 4. and (7) fixing holes.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that in any embodiment of the present invention, an axial offset femoral stem is used to reconstruct a hip joint structure by inserting the femoral stem into the medullary canal of a femur during a hip replacement procedure.
Referring to fig. 1, a schematic cross-sectional structure diagram of an axis offset femoral stem provided in an embodiment of the present application is shown, and specifically includes the following structures: comprises a femoral stem cone part 1, a femoral stem neck part 2 and a femoral stem body 3; the femoral stem taper part 1 is connected with the femoral stem body 3 through the femoral stem neck part 2, and a preset angle is formed between the central axis of the femoral stem body 3 and the central axis of the femoral stem neck part 2; the femoral stem is characterized in that a fixing hole 4 used for being connected with a femoral stem driver is formed in the top of the femoral stem body 3, the shape of the fixing hole 4 is matched with that of the femoral stem driver, the central axis of the fixing hole 4 is parallel to the central axis of the femoral stem body, and the central axis of the fixing hole 4 deviates from one side of the neck of the femoral stem by 0.1-45 mm.
In the embodiment of the present application, the femoral stem taper portion 1, the femoral stem neck portion 2, and the femoral stem shaft portion 3; the femoral stem taper part 1 is connected with the femoral stem body 3 through the femoral stem neck part 2, and a preset angle is formed between the central axis of the femoral stem body 3 and the central axis of the femoral stem neck part 2; the top of the femoral stem handle body 3 is provided with a fixing hole 4 for connecting a femoral stem driver, the shape of the fixing hole 4 is matched with that of the femoral stem driver, the central axis of the fixing hole 4 is parallel to the central axis of the femoral stem handle body, the central axis of the fixing hole 4 deviates from the neck of the femoral stem by L, and the value range of the L is 0.1mm-45 mm. Through the axis of 3 top fixed orificess 4 of femoral stem handle body with femoral stem handle body 3's axis parallel arrangement's design guarantees that implantation operation process is convenient more high-efficient, guarantees that the implantation state of femoral stem false body is more accurate.
Next, an axis offset femoral stem in the present exemplary embodiment will be further described.
In the embodiment of the application, the femoral stem comprises a femoral stem conical part 1, a femoral stem neck part 2 and a femoral stem body 3; the femoral stem taper part 1 is connected with the femoral stem body 3 through the femoral stem neck part 2, and a preset angle is formed between the central axis of the femoral stem body 3 and the central axis of the femoral stem neck part 2;
in a specific embodiment, the angle between the central axis of the neck 2 of the femoral stem and the transverse axis of the shoulder of the femoral stem is 125 ° to 145 °, and may be 125 °, 135 ° or 145 °. The angle formed by the central axis of the neck part 2 of the femoral stem and the central axis of the bottom part of the femoral stem is 125-145 degrees, and specifically can be 125 degrees, 135 degrees or 145 degrees.
In a specific embodiment, a fixing hole 4 for connecting a femoral stem driver is arranged at the top of the femoral stem handle body 3, the shape of the fixing hole 4 is matched with that of the femoral stem driver, a central axis of the fixing hole 4 is parallel to a central axis of the femoral stem handle body, and the central axis of the fixing hole 4 deviates 0.1mm-45mm from one side of the neck of the femoral stem.
The femoral stem cone part 1 is in arc transition connection with the femoral stem neck part 2, and the femoral stem cone part 1 is in a conical shape.
In a specific embodiment, the end of the femoral stem shaft 3 close to the femoral stem neck 2 is larger than the end far away from the femoral stem neck 2.
In a specific embodiment, the outer surface of the femoral stem handle body 3 is sprayed with a titanium coating and/or a hydroxyapatite coating and/or a sand coating, and the titanium coating is sprayed on the surface, so that the biocompatibility of the femoral stem is enhanced.
It should be noted that the bottom of the femoral stem is conical, the conical shape is used for reducing the resistance of the femoral stem during implantation, and the conical shape is beneficial to the entrance of the femoral stem during the implantation of the femoral stem.
It should be noted that the peripheral wall of the femoral stem shaft 3 is provided with a lateral groove for increasing the contact area with the bone. The transverse grooves can increase the contact area of the femoral stem with the bone in the femoral medullary cavity, and can convert the annular pressure of the femoral stem originally formed in the medullary cavity into longitudinal pressure, so that the growth of the bone is better stimulated, and the femoral stem is more stable and durable.
It should be noted that, the peripheral wall of the bottom of the femoral stem handle body 3 is provided with a longitudinal groove for increasing the contact area with the bone, the longitudinal groove increases the contact area of the femoral stem with the bone in the femoral medullary cavity, stimulates the growth of the bone, and can effectively improve the dislocation problem in the use process caused by the axial rotation of the femoral stem relative to the femur, so that the femoral stem is more stable and durable.
The lowest part of the bottom of the femoral stem handle body 3 is spherical, so that the resistance of the femoral stem during implantation can be reduced, and the damage to a medullary cavity is reduced; effectively reducing the stress concentration problem at the bottom when the femoral stem is loaded and relieving the over stimulation to the bone.
In one embodiment, the femoral stem taper 1, femoral stem neck 2, and femoral stem body 3; the femoral stem taper part 1 is connected with the femoral stem body 3 through the femoral stem neck part 2, and a preset angle is formed between the central axis of the femoral stem body 3 and the central axis of the femoral stem neck part 2; the femoral stem is characterized in that a fixing hole 4 used for being connected with a femoral stem driver is formed in the top of the femoral stem body 3, the shape of the fixing hole 4 is matched with that of the femoral stem driver, the central axis of the fixing hole 4 is parallel to the central axis of the femoral stem body, and the central axis of the fixing hole 4 deviates from one side of the neck of the femoral stem by 0.1-45 mm.
In an embodiment of the present application, the femoral stem taper portion 1 is connected to the femoral stem body 3 through the femoral stem neck portion 2, and a preset angle is formed between a central axis of the femoral stem body 3 and a central axis of the femoral stem neck portion 2; the femoral stem is equipped with the fixed orifices 4 that is used for connecting the femoral stem driver at 3 tops of femoral stem handle body, the shape of fixed orifices 4 with the shape looks adaptation of femoral stem driver, the axis of fixed orifices 4 with the axis parallel arrangement of femoral stem handle body, the axis of fixed orifices 4 is 0.1mm skew on one side of the femoral stem neck.
In an embodiment of the present application, the femoral stem taper portion 1 is connected to the femoral stem body 3 through the femoral stem neck portion 2, and a preset angle is formed between a central axis of the femoral stem body 3 and a central axis of the femoral stem neck portion 2; the femoral stem is equipped with the fixed orifices 4 that is used for connecting the femoral stem driver at 3 tops of femoral stem handle body, the shape of fixed orifices 4 with the shape looks adaptation of femoral stem driver, the axis of fixed orifices 4 with the axis parallel arrangement of femoral stem handle body, the axis of fixed orifices 4 is 25mm skew on one side of the femoral stem neck.
In an embodiment of the present application, the femoral stem taper portion 1 is connected to the femoral stem body 3 through the femoral stem neck portion 2, and a preset angle is formed between a central axis of the femoral stem body 3 and a central axis of the femoral stem neck portion 2; the femoral stem is equipped with the fixed orifices 4 that is used for connecting the femoral stem driver at 3 tops of femoral stem handle body, the shape of fixed orifices 4 with the shape looks adaptation of femoral stem driver, the axis of fixed orifices 4 with the axis parallel arrangement of femoral stem handle body, the axis of fixed orifices 4 to femoral stem neck one side skew 45 mm.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The detailed description is given above on the femoral stem with the inclination angle provided by the utility model, and the specific examples are applied herein to explain the principle and the implementation manner of the utility model, and the description of the above embodiments is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, and in summary, the content of the present specification should not be understood as the limitation of the present invention.
Claims (6)
1. An axis offset femoral stem is used for reconstructing hip joint in artificial hip joint replacement surgery and is characterized by comprising a femoral stem cone part, a femoral stem neck part and a femoral stem body;
the femoral stem taper part is connected with the femoral stem body through the femoral stem neck part, and a preset angle is formed between a central axis corresponding to the femoral stem body and a central axis corresponding to the femoral stem neck part;
the femoral stem comprises a femoral stem body and is characterized in that a fixing hole used for being connected with a femoral stem driver is arranged at the top of the femoral stem body, the shape of the fixing hole is matched with that of the femoral stem driver, the central axis of the fixing hole is parallel to the central axis of the femoral stem body, and the central axis of the fixing hole deviates 0.1-45 mm towards one side of the neck of the femoral stem.
2. The axis-offset femoral stem of claim 1, wherein the femoral stem body is larger at an end proximal to the femoral stem neck than at an end distal to the femoral stem neck.
3. The axis-offset femoral stem according to claim 1, wherein the femoral stem taper and the femoral stem neck blend.
4. The axis-offset femoral stem according to claim 1, wherein the predetermined angle is 125 ° to 145 °.
5. The axis-offset femoral stem according to claim 1, wherein the femoral taper is conical.
6. The axis-offset femoral stem according to any one of claims 1 to 5, wherein the outer surface of the stem body of the femoral stem is coated with a titanium coating and/or a hydroxyapatite coating and/or a sand coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120311359.6U CN215019754U (en) | 2021-02-03 | 2021-02-03 | Axial offset femoral stem |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120311359.6U CN215019754U (en) | 2021-02-03 | 2021-02-03 | Axial offset femoral stem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215019754U true CN215019754U (en) | 2021-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120311359.6U Active CN215019754U (en) | 2021-02-03 | 2021-02-03 | Axial offset femoral stem |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215019754U (en) |
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2021
- 2021-02-03 CN CN202120311359.6U patent/CN215019754U/en active Active
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