CN215019756U - Femoral stem prosthesis - Google Patents
Femoral stem prosthesis Download PDFInfo
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- CN215019756U CN215019756U CN202120313368.9U CN202120313368U CN215019756U CN 215019756 U CN215019756 U CN 215019756U CN 202120313368 U CN202120313368 U CN 202120313368U CN 215019756 U CN215019756 U CN 215019756U
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- femoral stem
- side face
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- prosthesis
- neck
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Abstract
The utility model provides a femoral stem prosthesis, 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, wherein the included 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 handle body comprises a first side face connected with the femoral stem neck, a second side face arranged opposite to the first side face, a third side face perpendicular to the first side face and a fourth side face arranged opposite to the third side face; the included angle formed by the third side face and the fourth side face is greater than or equal to-50 degrees and smaller than 5 degrees. Through the design of the included angle between the third side surface and the fourth side surface of the femoral stem, the femoral stem is prevented from rotating and loosening due to the movement of a patient, and other corresponding complications are avoided.
Description
Technical Field
The utility model relates to the technical field of medical machinery, in particular to a femoral stem prosthesis.
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 prosthesis is inserted into the femoral bone marrow cavity, the ball head is installed, and the acetabular cup is installed in the acetabulum, so that the function of the hip joint is realized.
In the prior art, the outer side of the stem body of the artificial hip joint femoral stem is mostly curved, such as a parabola, an arc line and the like.
However, after the artificial hip joint femoral stem with the curved cross section is implanted into the femoral bone marrow cavity of a human body, the femoral stem is easy to rotate and loosen due to the movement of the patient, and the anti-rotation stability of the femoral stem on the structural design is insufficient, so that other corresponding complications are caused.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention has been made in order to provide a femoral stem prosthesis that overcomes or at least partially solves the above problems.
The utility model discloses a femoral stem prosthesis, 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 handle body comprises a first side face connected with the femoral stem neck, a second side face arranged opposite to the first side face, a third side face perpendicular to the first side face and a fourth side face arranged opposite to the third side face; the included angle formed by the third side face and the fourth side face is greater than or equal to-50 degrees and smaller than 5 degrees.
Preferably, the first side surface and the second side surface are both arc-shaped and convex outwards.
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 top of the femoral stem handle body is provided with a fixing hole for connecting a femoral stem driver.
Preferably, the femoral stem taper and the femoral stem neck are transitionally connected by an arc.
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 the embodiment of the application, the femoral stem taper part, the femoral stem neck part and the femoral stem body are arranged; 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 handle body comprises a first side face connected with the femoral stem neck, a second side face arranged opposite to the first side face, a third side face perpendicular to the first side face and a fourth side face arranged opposite to the third side face; the included angle formed by the third side face and the fourth side face is greater than or equal to-50 degrees and smaller than 5 degrees. Through the design of the included angle between the third side surface and the fourth side surface of the femoral stem, the femoral stem is prevented from rotating and loosening due to the movement of a patient, and other corresponding complications are avoided.
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 structural view of an embodiment of a femoral stem prosthesis according to the present invention;
fig. 2 is a schematic view of a cross-sectional structure of a femoral stem body viewed from a top a-a of the present invention;
1. a femoral stem taper; 2. a femoral stem neck; 3. a femoral stem body; 4. a third side; 5. a fourth side surface.
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, a femoral stem prosthesis is used to reconstruct a hip joint structure by inserting a femoral stem into a femoral medullary cavity in a hip replacement operation.
Referring to fig. 1, a schematic structural diagram of a femoral stem prosthesis 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 a central axis corresponding to the femoral stem body 3 and a central axis corresponding to the femoral stem neck part 2; the femoral stem handle body 3 comprises a first side surface connected with the femoral stem neck part 2, a second side surface arranged opposite to the first side surface, a third side surface 4 vertical to the first side surface and a fourth side surface 5 arranged opposite to the third side surface 4; the included angle formed by the third side surface 4 and the fourth side surface 5 is greater than or equal to-50 degrees and less than 5 degrees.
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 a central axis corresponding to the femoral stem body 3 and a central axis corresponding to the femoral stem neck part 2; the femoral stem handle body 3 comprises a first side surface connected with the femoral stem neck part 2, a second side surface arranged opposite to the first side surface, a third side surface 4 vertical to the first side surface and a fourth side surface 5 arranged opposite to the third side surface 4; the included angle formed by the third side surface 4 and the fourth side surface 5 is greater than or equal to-50 degrees and less than 5 degrees. Through the design of the included angle between the third side surface 4 and the fourth side surface 5 of the femoral stem, the femoral stem is prevented from rotating and loosening due to the movement of a patient, and other corresponding complications are avoided.
Hereinafter, a femoral stem prosthesis according to 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 comprises a femoral stem neck part 2, a femoral stem body 3, a femoral stem pyramid part 1, a femoral stem neck part 2 and a femoral stem neck part 2, wherein the femoral stem pyramid part 1 is connected with the femoral stem body 3, and a central axis corresponding to the femoral stem body 3 and a central axis corresponding to the femoral stem neck part 2 are provided with preset angles.
In a specific embodiment, the preset angle between the central axis of the femoral stem neck 2 and the transverse axis of the femoral stem shoulder is 125 ° to 145 °, specifically 125 °, 135 ° or 145 °.
The angle formed by the central axis corresponding to the femoral stem neck part 2 and the central axis at the bottom of the femoral stem is 125-145 degrees, and specifically can be 125 degrees, 135 degrees or 145 degrees.
In a specific embodiment, the femoral stem body 3 comprises a first side connected to the femoral stem neck 2, a second side disposed opposite to the first side, a third side 4 perpendicular to the first side, and a fourth side 5 disposed opposite to the third side 4;
the femoral stem taper portion 1 and the femoral stem neck portion 2 are transitionally connected through an arc, and the femoral stem taper portion 1 is conical.
In a specific embodiment, the first side surface and the second side surface are both arc-shaped and convex outwards.
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.
Referring to fig. 2, which shows a schematic top view cross-sectional structure of a femoral stem prosthesis of the present invention, the femoral stem cone 1, the femoral stem neck 2 and the 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 a central axis corresponding to the femoral stem body 3 and a central axis corresponding to the femoral stem neck part 2; the femoral stem handle body 3 comprises a first side surface connected with the femoral stem neck part 2, a second side surface arranged opposite to the first side surface, a third side surface 4 vertical to the first side surface and a fourth side surface 5 arranged opposite to the third side surface 4; the third side surface 4 and the fourth side surface 5 form an included angle a, and the angle range of the included angle a is greater than or equal to-50 degrees and smaller than 5 degrees.
In an embodiment of the present application, the femoral stem taper portion 1 is connected to the femoral stem neck portion 2 and the femoral stem body 3, and an included angle between a central axis corresponding to the femoral stem body 3 and a central axis corresponding to the femoral stem neck portion 2 is 125 °; the femoral stem handle body 3 comprises a first side surface connected with the femoral stem neck part 2, a second side surface arranged opposite to the first side surface, a third side surface 4 vertical to the first side surface and a fourth side surface 5 arranged opposite to the third side surface 4; the third side 4 and the fourth side 5 form an angle in the range equal to-50 °.
In an embodiment of the present application, the femoral stem taper portion 1 is connected to the femoral stem neck portion 2 and the femoral stem body 3, and an included angle between a central axis corresponding to the femoral stem body 3 and a central axis corresponding to the femoral stem neck portion 2 is 135 degrees; the femoral stem handle body 3 comprises a first side surface connected with the femoral stem neck part 2, a second side surface arranged opposite to the first side surface, a third side surface 4 vertical to the first side surface and a fourth side surface 5 arranged opposite to the third side surface 4; the included angle formed by the third side surface 4 and the fourth side surface 5 is more than or equal to-30 degrees.
In an embodiment of the present application, the femoral stem taper portion 1 is connected to the femoral stem neck portion 2 and the femoral stem body 3, and an included angle between a central axis corresponding to the femoral stem body 3 and a central axis corresponding to the femoral stem neck portion 2 is 145 °; the femoral stem handle body 3 comprises a first side surface connected with the femoral stem neck part 2, a second side surface arranged opposite to the first side surface, a third side surface 4 vertical to the first side surface and a fourth side surface 5 arranged opposite to the third side surface 4; the included angle formed by the third side surface 4 and the fourth side surface 5 is more than or equal to 4 degrees.
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 (8)
1. A femoral stem prosthesis 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 handle body comprises a first side face connected with the femoral stem neck, a second side face arranged opposite to the first side face, a third side face perpendicular to the first side face and a fourth side face arranged opposite to the third side face;
the included angle formed by the third side face and the fourth side face is greater than or equal to-50 degrees and smaller than 5 degrees.
2. The femoral stem prosthesis of claim 1, wherein the first and second flanks are each outwardly convex arcuate.
3. The femoral stem prosthesis 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.
4. The femoral stem prosthesis of claim 1, wherein the top of the femoral stem body is provided with a fixing hole for connecting a femoral stem driver.
5. The femoral stem prosthesis of claim 1, wherein the femoral stem taper and the femoral stem neck are connected by a circular arc transition.
6. The femoral stem prosthesis of claim 1, wherein the predetermined angle is 125 ° to 145 °.
7. The femoral stem prosthesis of claim 1, wherein the femoral taper is conical.
8. The femoral stem prosthesis according to any one of claims 1 to 7, 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 |
|---|---|---|---|
| CN202120313368.9U CN215019756U (en) | 2021-02-03 | 2021-02-03 | Femoral stem prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120313368.9U CN215019756U (en) | 2021-02-03 | 2021-02-03 | Femoral stem prosthesis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215019756U true CN215019756U (en) | 2021-12-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120313368.9U Active CN215019756U (en) | 2021-02-03 | 2021-02-03 | Femoral stem prosthesis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215019756U (en) |
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2021
- 2021-02-03 CN CN202120313368.9U patent/CN215019756U/en active Active
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