CN215019755U - Proximal end recessed femoral stem - Google Patents
Proximal end recessed femoral stem Download PDFInfo
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- CN215019755U CN215019755U CN202120311483.2U CN202120311483U CN215019755U CN 215019755 U CN215019755 U CN 215019755U CN 202120311483 U CN202120311483 U CN 202120311483U CN 215019755 U CN215019755 U CN 215019755U
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Abstract
The utility model provides a proximal end sunken femoral stem, the femoral stem pyramid part is connected with the femoral stem body through the femoral stem neck part, wherein, the included angle between the axis corresponding to the femoral stem body and the axis corresponding to the femoral stem neck part is 125-145 degrees; the femoral stem handle body comprises a proximal femoral stem end and a distal femoral stem end, the distal femoral stem end is connected with the neck of the femoral stem through the proximal femoral stem end, the proximal femoral stem end is recessed to form a 0.01-8 mm distal femoral stem end, and the junction of the proximal femoral stem end and the distal femoral stem end is step-shaped. Through the design that femoral stem near-end is sunken, carry out surface treatment or partial mosaic shell in the use, make surface structure and human bone combination more stable.
Description
Technical Field
The utility model relates to the technical field of medical machinery, in particular to a proximal end recessed 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 proximal end depressed femoral stem is inserted into the femoral medullary cavity and is provided with a ball head and a acetabular cup arranged in the acetabulum, so that the function of the hip joint is realized.
In the prior art, the proximal end and the distal end of the artificial hip joint femoral stem are smoothly connected without special treatment.
However, the proximal end and the distal end of the artificial hip joint femoral stem are smoothly connected, and cannot be adapted to the proximal end shell and cannot be installed.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention has been developed to provide a proximally recessed femoral stem that overcomes, or at least partially solves, the above-mentioned problems.
The utility model discloses a proximal end sunken 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 handle body comprises a proximal femoral stem end and a distal femoral stem end, the distal femoral stem end is connected with the neck of the femoral stem through the proximal femoral stem end, the proximal femoral stem end is recessed to form a 0.01-8 mm distal femoral stem end, and the junction of the proximal femoral stem end and the distal femoral stem end is step-shaped.
Preferably, the femoral taper is conical.
Preferably, the femoral stem taper and the femoral stem neck are transitionally connected by an arc.
Preferably, the bottom of the distal end of the femoral stem is tapered.
Preferably, the top of the proximal end of the femoral stem is provided with a fixing hole for connecting a femoral stem driver.
Preferably, the preset angle is 125 to 145 °.
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 proximal femoral stem end and a distal femoral stem end, the distal femoral stem end is connected with the neck of the femoral stem through the proximal femoral stem end, the proximal femoral stem end is recessed to form a 0.01-8 mm distal femoral stem end, and the junction of the proximal femoral stem end and the distal femoral stem end is step-shaped. Through the design that femoral stem near-end is sunken, carry out surface treatment or partial mosaic shell in the use, make surface structure and human bone combination more stable.
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 proximal recessed femoral stem of the present invention;
fig. 2 is a schematic side view of a proximal recessed femoral stem embodiment of the present invention;
1. a femoral stem taper; 2. a femoral stem neck; 3. a femoral stem body; 4. a proximal femoral stem end; 5. distal end of femoral stem.
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 proximal recessed 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 structural diagram of a proximal recessed 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 the included angle between the central axis corresponding to the femoral stem body 3 and the central axis corresponding to the femoral stem neck part 2 is 125-145 degrees; the femoral stem handle body 3 comprises a proximal femoral stem end 4 and a distal femoral stem end 5, the distal femoral stem end 5 is connected with the neck femoral stem part 2 through the proximal femoral stem end 4, the proximal femoral stem end 4 is recessed, the value range of the distance L between the distal femoral stem end 5 and the proximal femoral stem end 4 is 0.01mm-8mm, and the joint of the proximal femoral stem end 4 and the distal femoral stem end 5 is step-shaped.
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 the included angle between the central axis corresponding to the femoral stem body 3 and the central axis corresponding to the femoral stem neck part 2 is 125-145 degrees; the femoral stem handle body 3 comprises a proximal femoral stem end 4 and a distal femoral stem end 5, the distal femoral stem end 5 is connected with the neck femoral stem part 2 through the proximal femoral stem end 4, the proximal femoral stem end 4 is recessed, the value range of the distance L between the distal femoral stem end 5 and the proximal femoral stem end 4 is 0.01mm-8mm, and the joint of the proximal femoral stem end 4 and the distal femoral stem end 5 is step-shaped. Through the design that femoral stem near-end 4 is sunken, make things convenient for the near-end part to inlay the shell in the use, the structure is more stable.
A proximal recessed femoral stem in the exemplary embodiment will be further described below.
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, an angle between the central axis of the neck portion 2 of the femoral stem and the lateral axis of the shoulder portion of the femoral stem is 125 ° to 145 °, specifically 125 °, 135 ° or 145 °, and an angle between the central axis of the neck portion 2 of the femoral stem and the central axis of the bottom portion of the femoral stem is 125 ° to 145 °, specifically 125 °, 135 ° or 145 °.
In a specific embodiment, the femoral stem handle body 3 includes a proximal femoral stem end 4 and a distal femoral stem end 5, the distal femoral stem end 5 is connected to the femoral stem neck portion 2 through the proximal femoral stem end 4, a distance L of the proximal femoral stem end 4 recessed from the distal femoral stem end 5 ranges from 0.01mm to 8mm, and a junction of the proximal femoral stem end 4 and the distal femoral stem end 5 is stepped.
Referring to fig. 2, a schematic side view of an embodiment of the proximal recessed femoral stem of the present invention is shown, specifically having the following structure: the femoral stem cone part 1 and the femoral stem neck part 2 are in transition connection through an arc, 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 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 proximal femoral stem end 4 and a distal femoral stem end 5, the distal femoral stem end 5 is connected with the neck femoral stem part 2 through the proximal femoral stem end 4, the proximal femoral stem end 4 is recessed, the value range of the distance L between the distal femoral stem end 5 and the proximal femoral stem end 4 is 0.01mm-8mm, and the joint of the proximal femoral stem end 4 and the distal femoral stem end 5 is step-shaped.
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 proximal femoral stem end 4 and a distal femoral stem end 5, the distal femoral stem end 5 is connected with the neck femoral stem part 2 through the proximal femoral stem end 4, the proximal femoral stem end 4 is recessed, the value range of the distance L between the distal femoral stem end 5 and the proximal femoral stem end 4 is 0.01mm-8mm, and the joint of the proximal femoral stem end 4 and the distal femoral stem end 5 is step-shaped.
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 proximal femoral stem end 4 and a distal femoral stem end 5, the distal femoral stem end 5 is connected with the neck femoral stem part 2 through the proximal femoral stem end 4, the proximal femoral stem end 4 is recessed, the value range of the distance L between the distal femoral stem end 5 and the proximal femoral stem end 4 is 0.01mm-8mm, and the joint of the proximal femoral stem end 4 and the distal femoral stem end 5 is step-shaped.
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 (7)
1. A proximal end sunken femoral stem is used for reconstructing a hip joint in an artificial hip joint replacement operation 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 proximal femoral stem end and a distal femoral stem end, the distal femoral stem end is connected with the neck of the femoral stem through the proximal femoral stem end, the proximal femoral stem end is recessed to form a 0.01-8 mm distal femoral stem end, and the junction of the proximal femoral stem end and the distal femoral stem end is step-shaped.
2. The proximally recessed femoral stem of claim 1, wherein the femoral stem taper is conical.
3. The proximally recessed femoral stem of claim 1, wherein the femoral stem taper and the femoral stem neck are connected by a circular arc transition.
4. The proximally recessed femoral stem of claim 1, wherein the distal base of the femoral stem is tapered.
5. The proximally recessed femoral stem of claim 1, wherein the proximal top of the femoral stem is provided with a fixation hole for attachment of a femoral stem driver.
6. The proximally recessed femoral stem of claim 1, wherein the predetermined angle is 125 ° to 145 °.
7. The proximally recessed femoral stem according to any one of claims 1-6, 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 |
|---|---|---|---|
| CN202120311483.2U CN215019755U (en) | 2021-02-03 | 2021-02-03 | Proximal end recessed femoral stem |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120311483.2U CN215019755U (en) | 2021-02-03 | 2021-02-03 | Proximal end recessed femoral stem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215019755U true CN215019755U (en) | 2021-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120311483.2U Active CN215019755U (en) | 2021-02-03 | 2021-02-03 | Proximal end recessed femoral stem |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215019755U (en) |
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2021
- 2021-02-03 CN CN202120311483.2U patent/CN215019755U/en active Active
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