Femoral inner side supporting frame
By designing a sliding medial femoral support frame and using it in combination with hollow compression screws, the problem of mechanical interference in the fixation of femoral neck fractures was solved, achieving higher stability and faster healing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2026-03-10
AI Technical Summary
When existing medial femoral neck support plates are used in combination with hollow compression screws, mechanical interference occurs, increasing the risk of nonunion of femoral neck fractures.
Design a medial femoral support frame including a slidable second body, which, when fixed in conjunction with a hollow compression screw, reduces wound gaps and converts shear stress into favorable compressive stress, thereby improving stability.
It reduces the risk of poor healing of femoral neck fractures, shortens the patient's recovery time, alleviates the patient's pain, and improves the fixation effect.
Smart Images
Figure CN223979846U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and in particular to a femoral medial support frame. Background Technology
[0002] In related technologies, after a femoral neck fracture, a pre-bent steel plate, designed to fit the shape of the femur, is primarily fixed to the femoral neck using screws to provide support and reduce the risk of fracture fragment displacement and main plate breakage. However, existing medial femoral neck support plates only provide support after fixation and cannot be displaced. When the medial femoral neck support plate and cannulated compression screws are used together, they can cause mechanical interference, increasing the risk of nonunion of the femoral neck fracture. Utility Model Content
[0003] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a medial femoral support frame that reduces the gap in the femoral wound, improves the stability of the combined fixation of the support frame body and the hollow compression screw, and reduces the risk of poor healing of femoral neck fractures.
[0004] According to an embodiment of the present invention, a medial femoral support frame includes: a support frame body, the support frame body including a fixing part and a first body, the fixing part and the first body being bent and connected, the fixing part being used for fixed connection with the femur; and a second body, the second body being disposed on the first body, the second body being slidable along the extension direction of the support frame body.
[0005] According to the femoral medial support frame of this utility model embodiment, by providing a second body that is slidable along the extension direction of the support frame body, the femoral head can be finely adjusted to a suitable position with the screw and the second body, thereby reducing the wound gap of the femur and facilitating femoral recovery. Furthermore, when the second body is fixed together with the hollow compression screw, the shear stress of the support frame body on the femur can be converted into favorable compressive stress, improving the stability of the joint fixation of the support frame body and the hollow compression screw, reducing the risk of failure of the hollow compression screw during fracture healing, and thus reducing the risk of difficult healing of femoral neck fractures.
[0006] In some embodiments of this utility model, the second body is formed with a guide groove that extends through the second body along the extension direction of the support frame body, and the first body passes through the guide groove.
[0007] In some embodiments of this utility model, the guide groove has two opposite and spaced-apart sidewalls, each sidewall having a first limiting boss. The first limiting boss and the bottom wall of the guide groove are opposite and spaced apart. The sidewall of the first body opposite to the sidewall of the groove forms a second limiting boss, which is located between the first limiting boss and the bottom wall of the groove.
[0008] In some embodiments of this utility model, the surface of the first limiting boss facing the corresponding second limiting boss and the surface of the second limiting boss facing the corresponding first limiting boss abut against each other.
[0009] In some embodiments of this utility model, the surface of the first limiting boss facing the corresponding second limiting boss is constructed as a first inclined surface, and the surface of the second limiting boss facing the corresponding first limiting boss is constructed as a second inclined surface, and the first inclined surface and the second inclined surface are adapted to each other.
[0010] In some embodiments of this utility model, the first body is formed with an installation notch, which is located on the side of the second limiting boss away from the bottom wall of the groove and adjacent to the second limiting boss, and the first limiting boss is assembled into the installation notch.
[0011] In some embodiments of this utility model, the two first limiting bosses are opposite to each other and spaced apart along the arrangement direction of the two groove sidewalls, and part of the first body is assembled between the two first limiting bosses, with both first limiting bosses abutting against the first body.
[0012] In some embodiments of this utility model, a first body is formed with a first through hole, and a second body is formed with a second through hole corresponding to the first through hole. At least one of the first through hole and the second through hole is constructed as a strip-shaped hole extending along the extension direction of the support frame body.
[0013] In some embodiments of this utility model, the fixing part has a third through hole.
[0014] In some embodiments of this utility model, the end face of the fixing part facing the first body is constructed as a limiting surface, which is adapted to abut against the second body.
[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0017] Figure 1 This is a schematic diagram of the femoral medial support frame according to an embodiment of the present utility model;
[0018] Figure 2 This is a structural schematic diagram of the support frame body according to an embodiment of the present utility model;
[0019] Figure 3 This is a schematic diagram of the structure of the second body according to an embodiment of the present utility model;
[0020] Figure 4This is an assembly diagram of the femoral medial support frame and the femur according to an embodiment of the present utility model;
[0021] Figure 5 This is a cross-sectional view of the second body of the femoral medial support frame according to an embodiment of the present utility model.
[0022] Figure label:
[0023] Medial femoral support frame 100;
[0024] Support frame body 1; fixing part 11; third through hole 111;
[0025] First body 12; Second limiting boss 121; Second inclined surface 122;
[0026] Installation notch 123; First through hole 124; Limiting surface 125;
[0027] Second body 2; Guide groove 21;
[0028] 22; first limiting boss 221; first inclined surface 222;
[0029] 23; second through hole 24;
[0030] Femur 200; shaft 201; femoral head 202; femoral neck 203;
[0031] Screw 300. Detailed Implementation
[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0033] The following is for reference. Figures 1-5 Description of the medial femoral support frame 100 according to an embodiment of the present utility model.
[0034] like Figures 1-5 As shown, the femoral medial support frame 100 according to an embodiment of the present utility model includes: a support frame body 1, the support frame body 1 includes a fixing part 11 and a first body 12, the fixing part 11 and the first body 12 are bent and connected, the fixing part 11 is used to fix and connect with the femur 200; a second body 2, the second body 2 is disposed on the first body 12, and the second body 2 is slidable along the extension direction of the support frame body 1.
[0035] In some embodiments of this application, the fixing part 11 and the first body 12 are integrally formed. In some embodiments of this application, the fixing part 11 and the first body 12 are welded together to connect them. Furthermore, the fixing part 11 and the first body 12 are bent together to create a certain angle between them. This facilitates the adaptation of the shape of the support frame body 1 to the shape of the inner side of the femoral neck 203, thereby ensuring a tight fit between the support frame body 1 and the inner side of the femoral neck 203, and enabling the support frame body 1 to better support the femoral neck 203.
[0036] The femur 200 may include a shaft 201, a femoral head 202, and a femoral neck 203. The fixation part 11 is fixedly connected to the shaft 201 of the femur 200. As some embodiments of this application, the fixation part 11 and the shaft 201 of the femur 200 may be connected by screws 300 so that the support frame body 1 may be fixed to the femur 200 by the fixation part 11, thereby achieving the support effect of the medial femoral support frame 100 on the shaft 201 and the femoral neck 203.
[0037] In some embodiments of this application, the second body 2 can be mounted on the first body 12 via a slide rail. In some embodiments of this application, the second body 2 can be snapped onto the first body 12. The second body 2 is slidably mounted along the extension direction of the support frame body 1. This arrangement allows for a reasonable structural configuration of the femoral medial support frame 100. In some embodiments of this application, the first body 12 is fixedly assembled with the bone shaft 201 of the femur 200 by screws 300, and the second body 2 is fixedly assembled with the femoral head 202 of the femur 200. By allowing the second body 2 to be slidably mounted along the extension direction of the support frame body 1, the position of the femoral head 202 can be finely adjusted to reduce the wound gap of the femur 200, thereby facilitating the recovery of the femur 200.
[0038] Specifically, the medial femoral support frame 100 is designed according to the structure of the femur 200 and the fracture characteristics of the femur 200. When the femoral neck 203 of the femur 200 is fractured, the fixation part 11 and the first body 12 can be bent to fit the shape of the support frame body 1 and the femoral neck 203. The fixation part 11 is fixed to the fracture pressure side of the femur 200 by screws 300, and the second body 2 is connected to the femoral head 202. When the medial femoral support frame 100 is not used in conjunction with the hollow compression screw, the femoral head 202 can be finely adjusted to a suitable position by the second body 2 sliding along the extension direction of the support frame body 1, thereby reducing the wound gap of the femur 200 and facilitating the recovery of the femur 200.
[0039] When the medial femoral support frame 100 is used in conjunction with the hollow compression screw, the hollow compression screw will pull the femoral head 202 slightly to reduce the wound gap at the femoral neck 203. Since the second body 2 is connected to the femoral head 202, when the femoral head 202 is slightly adjusted, the screw 300 inside the femoral head 202 and the second body 2 can move slightly with the femoral head 202. Because the second body 2 can slide along the extension direction of the support frame body 1, the mechanical interference between the screw 300 and the hollow compression screw when used together can be avoided, which is beneficial for aligning the support frame body 1 with the femoral neck 203. The shear stress of 0 is converted into favorable compressive stress, thereby reducing the risk of poor healing of femoral neck 203 fracture. Furthermore, by using the medial femoral support frame 100 in combination with hollow compression screws, the traditional method of fixation from the tension side of the lateral femoral neck 200 is broken through. Compression fixation and traction of the femoral neck 200 can be combined, thereby improving the fixation effect of the femoral neck 200, reducing the risk of poor healing of femoral neck 203 fracture, shortening the operation time and recovery time of patients, effectively reducing the pain of patients, and having good social and economic benefits.
[0040] Therefore, by setting a second body 2, which is slidable along the extension direction of the support frame body 1, the femoral head 202 can be finely adjusted to a suitable position with the screw 300 and the second body 2, thereby reducing the wound gap of the femoral head 200 and facilitating the recovery of the femoral head 200. Furthermore, when the second body 2 is fixed together with the hollow compression screw, the shear stress of the support frame body 1 on the femoral head 200 can be converted into favorable compressive stress, improving the stability of the joint fixation of the support frame body 1 and the hollow compression screw, reducing the risk of failure of the hollow compression screw during the fracture healing process, and thus reducing the risk of the femoral neck 203 fracture being difficult to heal.
[0041] In some embodiments of this utility model, such as Figure 1 and Figure 5 As shown, the second body 2 has a guide groove 21 that extends through the second body 2 along the extension direction of the support frame body 1, and the first body 12 passes through the guide groove 21.
[0042] Along the extension direction of the support frame body 1, the second body 2 has a guide groove 21 that penetrates the second body 2. The guide groove 21 can provide an assembly position for the first body 12. The shape and size of the guide groove 21 can be adapted to the shape and size of the outer contour of the first body 12. For example, the shape and size of the outer contour of the first body 12 can be slightly smaller than the shape and size of the guide groove 21 so that the first body 12 can be smoothly inserted into the guide groove 21. Thus, the second body 2 can be slidably set on the first body 12 along the extension direction of the support frame body 1. Furthermore, the guide groove 21 and the first body 12 cooperate with each other to guide the second body 2. Since the extension direction of the support frame body 1 is adapted to the shape of the femoral neck 203, by sliding the second body 2 along the extension direction of the support frame body 1, the risk of the patient's femoral head 202 being dislocated due to the random sliding of the second body 2 can be reduced, thereby reducing the risk of aggravated injury to the patient.
[0043] In some embodiments of this utility model, such as Figure 1 and Figure 3 As shown, the guide groove 21 has two groove sidewalls 22 that are opposite to each other and spaced apart. Each groove sidewall 22 has a first limiting boss 221. The first limiting boss 221 and the bottom wall 23 of the guide groove 21 are opposite to each other and spaced apart. The sidewall of the first body 12 opposite to the groove sidewall 22 forms a second limiting boss 121. The second limiting boss 121 is disposed between the first limiting boss 221 and the bottom wall 23.
[0044] The guide groove 21 has two groove sidewalls 22, along the first direction, i.e. Figure 3 In the X direction, two groove sidewalls 22 are arranged opposite to each other and spaced apart. Each of the two groove sidewalls 22 has a first limiting boss 221 at its end opposite to the groove bottom wall 23. The first limiting boss 221 and the groove bottom wall 23 of the guide groove 21 are arranged opposite to each other and spaced apart. In some embodiments of this application, the groove bottom wall 23, groove sidewalls 22, and first limiting boss 221 are integrally formed. The first direction is perpendicular to the extension direction of the support frame body 1.
[0045] The first body 12 has a second limiting boss 121 formed on the side wall of the first body opposite to the side wall 22 of the groove. The second limiting boss 121 is assembled between the first limiting boss 221 and the bottom wall 23 of the groove. The second limiting boss 121 can abut against both the first limiting boss 221 and the bottom wall 23 of the groove, thereby achieving the effect of slidably setting the second body 2 on the first body 12 along the extension direction of the support frame body 1. Moreover, compared with the second body 2 being slidably set on the first body 12 in other ways, this setting can simplify the cooperation between the guide groove 21 and the first body 12, simplify the processing, and help reduce the production cost of the femoral medial support frame 100.
[0046] In some embodiments of this utility model, such as Figure 5 As shown, the surface of the first limiting boss 221 facing the corresponding second limiting boss 121 abuts against the surface of the second limiting boss 121 facing the corresponding first limiting boss 221.
[0047] The first limiting protrusion 221 abuts against the surface of the corresponding second limiting protrusion 121, and the second limiting protrusion 121 abuts against the surface of the corresponding first limiting protrusion 221. This reduces the risk of the second limiting protrusion 121 wobbling in the guide groove 21 due to incomplete positioning of the first limiting protrusion 221 and the second limiting protrusion 121, thereby reducing the risk of wobbling of the second body 2 relative to the first body 12. This is beneficial to improving the relative stability of the second body 2 and the first body 12, thereby reducing the risk of femoral head 202 displacement and benefiting the patient's recovery.
[0048] In some embodiments of this utility model, such as Figure 3 and Figure 5 As shown, the surface structure of the first limiting boss 221 facing the corresponding second limiting boss 121 is a first inclined surface 222, and the surface structure of the second limiting boss 121 facing the corresponding first limiting boss 221 is a second inclined surface 122. The first inclined surface 222 and the second inclined surface 122 are adapted to each other.
[0049] The surface of the first limiting boss 221 facing the corresponding second limiting boss 121 is constructed as a first inclined surface 222, extending along a first direction from one end of the first inclined surface 222 near the sidewall 22 of the groove to one end away from the sidewall 22 of the groove, with the first inclined surface 222 inclined toward the bottom wall 23 of the groove. The surface of the second limiting boss 121 facing the corresponding first limiting boss 221 is constructed as a second inclined surface 122, extending along a first direction from one end of the two second inclined surfaces 122 away from each other to one end facing each other, with the second inclined surface 122 inclined toward the inside of the second limiting boss 121, so that the first inclined surface 222 and the second inclined surface 122 are adapted to each other. By setting the first inclined surface 222 and the second inclined surface 122, the limiting reliability of the first limiting boss 221 and the second limiting boss 121 can be improved, thereby improving the cooperation reliability of the second body 2 and the first body 12, reducing the risk of the second body 2 falling off the first body 12, and thus improving the fixation effect of the femoral medial support frame 100 on the femur 200, and reducing the risk of the femoral neck 203 fracture being difficult to heal.
[0050] In some embodiments of this utility model, such as Figure 2 , Figure 3 and Figure 5 As shown, the first body 12 has an installation notch 123. The installation notch 123 is located on the side of the second limiting boss 121 away from the bottom wall 23 of the groove and is adjacent to the second limiting boss 121. The first limiting boss 221 is assembled into the installation notch 123.
[0051] The mounting notch 123 is located on the side of the second limiting boss 121 away from the bottom wall 23 of the groove, and the mounting notch 123 is adjacent to the second limiting boss 121. The mounting notch 123 can provide an assembly position for the first limiting boss 221. By assembling the first limiting boss 221 into the mounting notch 123, the first body 12 and the second body 2 can be smoothly engaged and assembled, reducing the risk of assembly failure of the first body 12 and the second body 2 due to interference between the first limiting boss 221 and the first body 12. Thus, the second body 2 can be slidably set on the first body 12 along the extension direction of the support frame body 1.
[0052] In some embodiments of this utility model, such as Figure 5 As shown, the two first limiting bosses 221 are opposite to each other and spaced apart along the arrangement direction of the two groove sidewalls 22. Part of the first body 12 is assembled between the two first limiting bosses 221, and both first limiting bosses 221 abut against the first body 12.
[0053] The two first limiting protrusions 221 are arranged opposite each other along the arrangement direction of the two groove sidewalls 22, and the two first limiting protrusions 221 are spaced apart, so that a part of the first body 12 can be assembled between the two first limiting protrusions 221. Both first limiting protrusions 221 abut against the first body 12 to limit the second body 2 along the arrangement direction of the two groove sidewalls 22, reduce the risk of the second body 2 shaking along the arrangement direction of the two groove sidewalls 22, improve the relative stability of the second body 2 and the first body 12, thereby reducing the risk of femoral head 202 displacement and benefiting the patient's rehabilitation.
[0054] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the first body 12 has a first through hole 124, and the second body 2 has a second through hole 24 corresponding to the first through hole 124. At least one of the first through hole 124 and the second through hole 24 is constructed as a strip hole extending along the extension direction of the support frame body 1.
[0055] The first body 12 has a first through hole 124, and the second body 2 has a second through hole 24 corresponding to the first through hole 124, so that the screw 300 can be smoothly inserted into the first body 12 and the second body 2 and assembled with the femoral head 202. In some embodiments of this application, the first through hole 124 is constructed as a strip-shaped hole extending along the extension direction of the support frame body 1. In some embodiments of this application, both the first through hole 124 and the second through hole 24 are constructed as strip-shaped holes extending along the extension direction of the support frame body 1. In some embodiments of this application, the second through hole 24 is constructed as a strip-shaped hole extending along the extension direction of the support frame body 1. This application will describe the first through hole 124 as a strip-shaped hole extending along the extension direction of the support frame body 1 as an example.
[0056] The first through hole 124 is constructed as a strip-shaped hole extending along the extension direction of the support frame body 1. This allows for a reasonable structural design of the first through hole 124. When the femoral medial support frame 100 is used in conjunction with the hollow compression screw, the hollow compression screw will pull the femoral head 202 to move slightly, thereby reducing the wound gap at the femoral neck 203. When the femoral head 202 is finely adjusted, the screw 300 inside the femoral head 202 moves slightly with the femoral head 202. Because the first through hole 124 is constructed as a strip-shaped hole extending along the extension direction of the support frame body 1, the screw 300 can move smoothly within the first through hole 124. This reduces the risk of mechanical interference between the screw 300 and the hollow compression screw due to interference between the screw 300 and the first body 12 when the screw moves, thereby reducing the risk of secondary injury to the femur 200.
[0057] In some embodiments of this utility model, such as Figure 2 As shown, the fixing part 11 has a third through hole 111.
[0058] The third through hole 111 facilitates the assembly of the fixing part 11 with the femoral shaft 201. For example, by inserting a screw 300 through the third through hole 111 and connecting it with the femoral shaft 201, the fixing part 11 can be connected to the femoral shaft 201, thereby fixing the support frame body 1 to the femoral shaft 200 through the fixing part 11, thus achieving the supporting effect of the medial femoral support frame 100 on the femoral shaft 201 and the femoral neck 203.
[0059] In some embodiments of this utility model, such as Figure 2 As shown, the end face of the fixing part 11 facing the first body 12 is configured as a limiting surface 125, which is adapted to abut against the second body 2.
[0060] In some embodiments of this application, the cross-sectional dimension of the fixing part 11 is larger than that of the first body 12. The first body 12 is disposed at the end of the fixing part 11, thereby constructing the end face of the fixing part 11 facing the first body 12 as a limiting surface 125. The limiting surface 125 can abut against the second body 2 to limit the second body 2. When the second body 2 moves along the extension direction of the support frame body 1, the limiting surface 125 limits the second body 2, which can reduce the risk of secondary injury to the femur 200 caused by excessive movement of the second body 2, thereby benefiting the patient's recovery.
[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0062] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A medial femoral support frame, characterized in that, Comprise: A support frame body, the support frame body comprises a fixed part and a first body, the fixed part and the first body are connected by bending, the fixed part is used for fixed connection with the femur; A second body, the second body is provided on the first body, and the second body is slidable along the extension direction of the support frame body.
2. The femoral medial buttress of claim 1, wherein, The second body is formed with a guide groove penetrating through the second body along the extension direction of the support frame body, and the first body is arranged in the guide groove.
3. The femoral medial buttress of claim 2, wherein, The guide groove has two groove side walls opposite and spaced apart, each of the groove side walls has a first limiting boss, the first limiting boss and the groove bottom wall of the guide groove are opposite and spaced apart, the first body side wall opposite to the groove side wall is formed with a second limiting boss, and the second limiting boss is arranged between the first limiting boss and the groove bottom wall.
4. The femoral medial buttress of claim 3, wherein, The surface of the first limiting boss facing the corresponding second limiting boss and the surface of the second limiting boss facing the corresponding first limiting boss are in abutment.
5. The femoral medial buttress of claim 4, wherein, The surface of the first limiting boss facing the corresponding second limiting boss is configured as a first inclined surface, the surface of the second limiting boss facing the corresponding first limiting boss is configured as a second inclined surface, and the first inclined surface and the second inclined surface are matched.
6. The femoral medial buttress of claim 3, wherein, The first body is formed with a mounting gap, the mounting gap is located on the side of the second limiting boss away from the groove bottom wall and adjacent to the second limiting boss, and the first limiting boss is fitted in the mounting gap.
7. The femoral medial buttress of claim 3, wherein, The two first limiting bosses are opposite and spaced apart along the arrangement direction of the two groove side walls, part of the first body is fitted between the two first limiting bosses, and the two first limiting bosses are in abutment with the first body.
8. The femoral medial buttress of any one of Claims 1-7, wherein, The first body is formed with a first through hole, the second body is formed with a second through hole corresponding to the first through hole, and at least one of the first through hole and the second through hole is configured as a strip-shaped hole extending along the extension direction of the support frame body.
9. The femoral medial buttress of any of claims 1-7, wherein, The fixed part is formed with a third through hole.
10. The femoral medial buttress of any one of Claims 1-7, wherein, The end surface of the fixed part facing the first body is configured as a limiting surface, and the limiting surface is adapted to be in abutment with the second body.