CN215019758U - Proximal convex femoral stem - Google Patents
Proximal convex femoral stem Download PDFInfo
- Publication number
- CN215019758U CN215019758U CN202120315449.2U CN202120315449U CN215019758U CN 215019758 U CN215019758 U CN 215019758U CN 202120315449 U CN202120315449 U CN 202120315449U CN 215019758 U CN215019758 U CN 215019758U
- Authority
- CN
- China
- Prior art keywords
- femoral stem
- proximal
- femoral
- distal
- neck
- 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.)
- Active
Links
Images
Abstract
The utility model provides a proximal end convex 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, 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 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 protrudes out of the distal femoral stem end by 0.01-8 mm, and the joint of the proximal femoral stem end and the distal femoral stem end is step-shaped. Through the design that the proximal end of the femoral stem protrudes, the press-fit effect and the fatigue performance of the proximal end of the femoral stem are enhanced.
Description
Technical Field
The utility model relates to the technical field of medical machinery, especially, relate to a protruding femoral stem of near-end.
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 convex femoral stem 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 base of the proximal end of the handle body of the artificial hip joint femoral handle is not reinforced, and the proximal end and the distal end are smooth curves.
But the near end and the far end are smooth curves, and the fatigue strength is low after the implantation of the proximal end and the far end into the femoral bone marrow cavity of a human body, and the press fit effect is poor.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention has been developed to provide a proximally projecting femoral stem that overcomes, or at least partially solves, the above-mentioned problems.
The utility model discloses a proximal end convex 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 protrudes out of the distal femoral stem end by 0.01-8 mm, and the joint 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 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 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 protrudes out of the distal femoral stem end by 0.01-8 mm, and the joint of the proximal femoral stem end and the distal femoral stem end is step-shaped. Through the step-shaped design of the near end and the far end, the fatigue strength is high after the femoral head is implanted into the femoral bone marrow cavity of a human body, the press fit effect is good, and the implanted femoral head can be stably stored in the human body for a long time.
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 end raised femoral stem of the present invention;
fig. 2 is a schematic structural view of a femoral stem body of the present invention;
fig. 3 is a schematic side view of a femoral stem according to 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 of the embodiments of the present invention, a proximal raised femoral stem is used to reconstruct a hip joint by inserting the femoral stem into the medullary canal of the femur during a hip replacement procedure.
Referring to fig. 1, a schematic structural diagram of a proximal convex 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 portion 2 of the femoral stem through the proximal femoral stem end 4, the proximal femoral stem end 4 protrudes out of the distal femoral stem end 5, the value range of the distance L 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 portion 2 of the femoral stem through the proximal femoral stem end 4, the proximal femoral stem end 4 protrudes out of the distal femoral stem end 5, the value range of the distance L 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 step-shaped design of the near end and the far end, the fatigue strength is high after the femoral head is implanted into the femoral bone marrow cavity of a human body, the press fit effect is good, and the implanted femoral head can be stably stored in the human body for a long time.
A proximally projecting femoral stem in the exemplary embodiment will be further described below.
Referring to fig. 2, the schematic structural diagram of the femoral stem body of the present invention is shown, which 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;
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, 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, the proximal femoral stem end 4 protrudes beyond the distal femoral stem end 5 by a distance L ranging from 0.01mm to 8mm, and a joint between the proximal femoral stem end 4 and the distal femoral stem end 5 is stepped.
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.
Referring to fig. 3, a schematic side structure diagram of a femoral stem of the present invention is shown, which specifically includes the following structure: 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 tapered, the taper can prevent the distal end 5 of the femoral stem from contacting with the cortical bone of the thigh, can reduce thigh pain caused by thigh stress concentration, and is beneficial to the entry of the femoral stem during the femoral stem implantation process.
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 protrudes out of the distal femoral stem end 5, the value range of the distance L is 0.01mm, 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 protrudes out of the distal femoral stem end 5, the value range of the distance L is 6mm, 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 protrudes out of the distal femoral stem end 5, the value range of the distance L is 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 bulge 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 protrudes out of the distal femoral stem end by 0.01-8 mm, and the joint of the proximal femoral stem end and the distal femoral stem end is step-shaped.
2. The proximally convex femoral stem of claim 1, wherein the femoral stem taper is conical.
3. The proximally convex 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 projecting femoral stem of claim 1, wherein the distal base of the femoral stem is tapered.
5. The proximally-raised femoral stem according to claim 1, wherein the proximal top of the femoral stem is provided with a fixation hole for connecting a femoral stem driver.
6. The proximally raised femoral stem of claim 1, wherein the predetermined angle is 125 ° to 145 °.
7. The proximally-raised femoral stem according to any one of claims 1 to 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 |
|---|---|---|---|
| CN202120315449.2U CN215019758U (en) | 2021-02-03 | 2021-02-03 | Proximal convex femoral stem |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120315449.2U CN215019758U (en) | 2021-02-03 | 2021-02-03 | Proximal convex femoral stem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215019758U true CN215019758U (en) | 2021-12-07 |
Family
ID=79259160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120315449.2U Active CN215019758U (en) | 2021-02-03 | 2021-02-03 | Proximal convex femoral stem |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215019758U (en) |
-
2021
- 2021-02-03 CN CN202120315449.2U patent/CN215019758U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5176712A (en) | Endoprostheses with resorption preventing means | |
| US5007931A (en) | Porous coated prosthesis | |
| US4488319A (en) | Method of two-stage implantation of a joint prosthesis and prosthetic product | |
| US5080680A (en) | Femoral stem prosthesis with preapplied cement mantle | |
| WO2020114252A1 (en) | Toe joint prosthesis and manufacturing method therefor | |
| JPH02246969A (en) | Internal prosthesis | |
| JP6554166B2 (en) | Osseo Integration-capable device | |
| US5171288A (en) | Femoral stem prosthesis with preapplied cement mantle | |
| CN215019753U (en) | Outside adduction femoral stem | |
| CN215019758U (en) | Proximal convex femoral stem | |
| CN213250056U (en) | Femoral stem | |
| CN215019755U (en) | Proximal end recessed femoral stem | |
| CN214967162U (en) | Hip joint femoral stem | |
| CN215019754U (en) | Axial offset femoral stem | |
| CN215080281U (en) | Femoral stem with equal outside chamfers | |
| CN215019757U (en) | Femoral stem with equal inner chamfer angle | |
| CN215019756U (en) | Femoral stem prosthesis | |
| CN214632509U (en) | Femoral stem | |
| CN215503590U (en) | Neck hip joint prosthesis is protected to matched stack formula | |
| CN213758773U (en) | Femoral stem prosthesis with inclination angle | |
| CN215130917U (en) | Femoral stem with chamfer at outer side | |
| CN210019806U (en) | Artificial joint casting | |
| CN215019752U (en) | Femoral stem with chamfer at inner side | |
| CN111297521A (en) | Surface shoulder joint prosthesis | |
| CN117257529B (en) | Tantalum coating hip joint prosthesis system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |