Nail plate system for proximal femur of child

Abstract

The utility model relates to the technical field of medical instruments, and provides a child proximal femur screw plate system which comprises a locking plate, a screw, a locking screw and a kirschner wire. The locking plate is used for being arranged on the outer side of the proximal femur, a first connecting hole and a second connecting hole are formed in the locking plate, and the first connecting hole and the second connecting hole are formed in a spaced mode. The at least one screw is inserted and fixed in the first connecting hole; the number of the kirschner wires is at least one, and the kirschner wires are arranged in the second connecting holes in a penetrating mode and extend into the femoral head. The screw and the kirschner wire are arranged in parallel; the locking plate is fixed to the proximal femur through the locking screws. The implanting length of the screw is not larger than the length from the outer side of the proximal femur to the end, close to the femoral head, of the femoral neck. According to the child femur near-end nail plate system, required stability and a micro-motion environment are provided for fracture healing of the femoral neck, and stable fixation of the femoral neck is achieved on the premise that skeletal development of a child is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a proximal femoral nail plate system for children. Background Art

[0002] For the treatment of femoral neck fractures in children, three hollow nails are usually implanted in the femoral neck in an inverted triangle to help the growth recovery of the femoral neck. However, there will be some bone absorption and nail withdrawal at the fracture end of the femoral neck, which can easily cause femoral neck shortening and femoral head necrosis. In addition, the internal fixation strength and stability are not good enough. Due to the hyperactivity of children, the femoral neck cannot be fixed well. In addition, the proximal femoral nail plate system of adults, although with high fixation strength and good stability, fixes the growth epiphysis of the femoral neck in children, affecting the growth and development of children's bones. Utility Model Content

[0003] The utility model provides a child femoral proximal nail plate system, which is used to solve the problem that the child femoral neck fixation device in the prior art is difficult to stably fix the child femoral neck fracture without affecting the growth and development of the child.

[0004] The utility model provides a proximal femoral nail plate system for children, comprising: a locking plate, a screw, a locking screw and a Kirschner wire;

[0005] The locking plate is used to be placed on the outer side of the proximal end of the femur, and a first connecting hole and a second connecting hole are provided on the locking plate, and the first connecting hole and the second connecting hole are arranged at intervals;

[0006] At least one screw is provided, and the screw is inserted and fixed in the first connecting hole;

[0007] At least one Kirschner wire is provided, and the Kirschner wire is inserted into the second connecting hole and extends into the femoral head;

[0008] The screw and the Kirschner wire are arranged in parallel;

[0009] The locking plate is fixed to the proximal end of the femur by the locking screw;

[0010] The screw extends into the femoral neck, and the implantation length of the screw is no greater than the length from the outer side of the proximal end of the femur to one end of the femoral neck close to the femoral head.

[0011] According to a pediatric proximal femoral nail plate system provided by the utility model, the length of the screw is less than the sum of the length from the outer side of the proximal femur to the end of the femoral neck close to the femoral head and the length of the locking plate, and is greater than the sum of the length from the outer side of the proximal femur to the midpoint of the femoral neck along the axial direction and the length of the locking plate.

[0012] According to a child's proximal femoral nail plate system provided by the utility model, the screws are provided with three; correspondingly, the first connecting holes are also provided with three;

[0013] The three screws are arranged in an inverted triangle.

[0014] According to a child's proximal femoral nail plate system provided by the utility model, a rod section of the screw is provided with a round hole, and an end of the screw close to the femoral neck is provided with a threaded section.

[0015] According to the proximal femoral nail plate system for children provided by the utility model, the Kirschner wire is exposed from the locking plate and is bent outside the locking plate.

[0016] According to the proximal femoral nail plate system for children provided by the utility model, one end of the Kirschner wire extending into the femoral neck is provided with a sharp end.

[0017] According to a child's proximal femoral nail plate system provided by the utility model, the locking plate is further provided with a third connecting hole;

[0018] The third connection hole is spaced apart from the first connection hole and the second connection hole respectively;

[0019] The locking screw is passed through the third connecting hole and locks the locking plate and the proximal end of the femur.

[0020] According to a child's proximal femoral nail plate system provided by the utility model, the locking plate comprises a first plate body and a second plate body connected to each other;

[0021] The first plate body and the second plate body are arranged at an angle, the first connection hole and the second connection hole are arranged on the first plate body, and the third connection hole is arranged on the second plate body;

[0022] The first plate is used to be placed at the intersection of the axial extension direction of the femoral neck and the outer side of the proximal end of the femur.

[0023] According to a pediatric proximal femoral nail plate system provided by the utility model, the rod body of the locking screw is fully threaded;

[0024] And / or, the outer wall of the locking screw is provided with a cutting edge.

[0025] According to a child's proximal femoral nail plate system provided by the utility model, the third connecting hole is in an 8-shape;

[0026] The rotation direction of the third connecting hole is arranged to extend along the axial direction of the femur.

[0027] The child's proximal femoral nail plate system provided by the utility model is provided with a locking plate, a screw, a locking screw and a Kirschner wire. The screw fixes the locking plate to the proximal femur, and the screw extends into the femoral neck but not into the femoral head, so that the screw avoids the child's growth plate. In addition, the Kirschner wire extends into the femoral head to fix the fracture end of the femoral neck. Based on the limited sliding of the Kirschner wire and the femoral neck, the femoral head and the proximal femur, the Kirschner wire can also perform micro-motion pressure on the fracture end, thereby reducing the possibility of femoral neck shortening and promoting bone growth, providing the required stability and micro-motion environment for the fracture healing of the femoral neck, and realizing stable fixation of the femoral neck without affecting the bone development of the child. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 It is a schematic diagram of the child's proximal femoral nail plate system provided by the utility model being installed in the child's body;

[0030] Figure 2 It is a schematic diagram of the main structure of the locking plate provided by the utility model;

[0031] Figure 3 It is a three-dimensional structural schematic diagram of the screw provided by the utility model;

[0032] Figure 4 It is a three-dimensional structural schematic diagram of the locking screw provided by the utility model;

[0033] Figure 5 It is a three-dimensional structural schematic diagram of the Kirschner wire provided by the utility model.

[0034] Reference numerals:

[0035] 1. Children's proximal femoral nail plate system;

[0036] 11. locking plate; 12. screw; 13. locking screw; 14. Kirschner wire; 111. first connecting hole; 112. second connecting hole; 113. third connecting hole; 114. first plate body; 115. second plate body; 121. threaded section; 131. cutting edge; 141. tip;

[0037] 2. Proximal femur; 3. Femoral neck; 4. Femoral head. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] Combine the following Figures 1 to 5 The pediatric proximal femoral nail plate system provided by the embodiment of the utility model is described in detail through specific embodiments and application scenarios.

[0040] like Figure 1 and Figure 2 As shown, this embodiment provides a pediatric proximal femoral nail plate system 1, comprising: a locking plate 11, a screw 12, a locking screw 13 and a Kirschner wire 14.

[0041] The locking plate 11 is used to be placed on the outer side of the proximal femur 2. The locking plate 11 is provided with a first connecting hole 111 and a second connecting hole 112. The first connecting hole 111 and the second connecting hole 112 are arranged at intervals.

[0042] At least one screw 12 is provided, and the screw 12 is inserted and fixed in the first connecting hole 111; at least one Kirschner wire 14 is provided, and the Kirschner wire 14 is passed through the second connecting hole 112 and extends into the femoral head 4; the screw 12 and the Kirschner wire 14 are arranged in parallel; the locking plate 11 is fixed to the proximal end of the femur 2 by the locking screw 13.

[0043] The screw 12 extends into the femoral neck 3 , and the implantation length of the screw 12 is no greater than the length from the outer side of the proximal end of the femur 2 to an end of the femoral neck 3 close to the femoral head 4 .

[0044] It is understandable that the screw 12 is used to fix the locking plate 11 to the proximal femur 2, and the screw 12 extends into the femoral neck 3. The implanted length of the screw 12 does not reach the femoral head 4. The growth plate of the child is located at the intersection of the femoral neck 3 and the femoral head 4, so the screw 12 does not extend into the growth plate, so that the screw 12 does not lock the growth plate, so that the child's proximal femoral nail plate system 1 does not restrict the child's bone development.

[0045] Specifically, one screw 12 may be provided, or multiple screws 12 may be provided.

[0046] The Kirschner wire 14 can pass through the femoral neck 3 to reach the femoral head 4, so that the Kirschner wire 14 can pass through the fractured ends of the femoral neck 3, thereby playing a good fixing effect on the fractured ends of the femoral neck 3. In addition, since the Kirschner wire 14 is a structure with a smooth outer wall, and the Kirschner wire 14 is not fixedly connected to the locking plate 11, the connection between the Kirschner wire 14 and the femur 2, the femoral neck 3 and the femoral head 4 is not completely limited. The Kirschner wire 14 can move slightly along the femoral neck 3. In the gap caused by bone absorption at the fractured ends of the femoral neck 3, the fractured ends of the femoral neck 3 contact each other under the micro-pressurization of the Kirschner wire 14, which promotes the absorption of the gap and the healing of the fractured ends of the femoral neck 3.

[0047] Specifically, one or more Kirschner wires 14 may be provided.

[0048] The locking screw 13 is used to fix the locking plate 11 to the proximal end of the femur 2. The locking screw 13 and the screw 12 respectively fix the locking plate 11 at different positions of the locking plate 11. The locking screw 13 fixes and pressurizes the locking plate 11 so that the locking plate 11 cannot rotate relative to the proximal end of the femur 2, thereby having an anti-rotation effect.

[0049] The child's proximal femoral nail plate system 1 provided by the utility model is provided with a locking plate 11, a screw 12, a locking screw 13 and a Kirschner wire 14. The screw 12 fixes the locking plate 11 to the proximal femur 2, and the screw 12 extends into the femoral neck 3 but does not extend into the femoral head 4, so that the screw 12 avoids the child's growth plate, and the Kirschner wire 14 extends into the femoral head 4. While fixing the fracture end of the femoral neck 3, based on the limited sliding of the Kirschner wire 14 and the femoral neck 3, the femoral head 4 and the proximal femur 2, the Kirschner wire 14 can also perform micro-motion pressurization on the fracture end, thereby reducing the possibility of shortening of the femoral neck 3 and promoting bone growth, providing the required stability and micro-motion environment for the fracture healing of the femoral neck 3, and realizing stable fixation of the femoral neck 3 without affecting the child's bone development.

[0050] In some embodiments, Figure 1 As shown, the length of the screw 12 of this embodiment is less than the sum of the length from the outer side of the proximal femur 2 to the end of the femoral neck 3 close to the femoral head 4 and the length of the locking plate 11, and is greater than the sum of the length from the outer side of the proximal femur 2 to the midpoint of the femoral neck 3 along the axial direction and the length of the locking plate 11.

[0051] It is understandable that the growth plate of a child is located at the intersection of the femoral neck 3 and the femoral head 4. In the example of a femoral neck 3 fracture, most of the fracture ends of the femoral neck 3 are located at the midpoint of the femoral neck 3 along the axial direction. Therefore, one end of the screw 12 is between the midpoint of the femoral neck 3 and the end of the femoral neck 3 close to the femoral head 4, and the other end of the screw 12 passes through the locking plate 11 and is fixed to the locking plate 11.

[0052] In this embodiment, the length of the screw 12 is set so that the screw 12 fixes the femoral neck 3 between the midpoint of the femoral neck 3 and the femoral head 4, so that the screw 12 can both pressurize and fix the fracture end of the femoral neck 3 and does not reach the growth plate of the child, thereby not affecting the growth and development of the child's bones and fixing the fracture end of the femoral neck 3, thereby achieving a better healing effect of the fracture of the femoral neck 3 in children.

[0053] In some embodiments, Figure 1 and Figure 2 As shown, in this embodiment, three screws 12 are provided; correspondingly, three first connecting holes 111 are also provided.

[0054] The three screws 12 are arranged in an inverted triangle.

[0055] It can be understood that the three screws 12 form the three vertices of a triangle, and the line connecting the two screws 12 on the upper side forms one side of the triangle, and the line connecting the lower screw 12 and the two screws 12 on the upper side respectively form the other two sides of the triangle, so the three screws 12 form an inverted triangle arrangement.

[0056] The inverted triangle setting of the screw 12 of this embodiment provides good initial stability, helps to maintain the position of the fracture end, and the stable triangular structure can also prevent the fracture end from rotating. The inverted triangle setting provides stabilizing force and anti-rotational force. This configuration helps to maintain the alignment of the fracture ends during the fracture healing process and allows a certain amount of compression, thereby promoting healing. In addition, the inverted triangle setting allows the screw 12 to adapt to different fracture types and femoral anatomical structures, and to adapt to children of different sizes.

[0057] In some embodiments, Figure 3 As shown, the rod section of the screw 12 of this embodiment is provided with a round hole, and the end of the screw 12 close to the femoral neck 3 is provided with a threaded section 121.

[0058] It is understandable that the round hole of the screw 12 makes the interior of the screw 12 a hollow structure. The hollow structure reduces the damage of the screw 12 to the surrounding tissues, can usually be used for minimally invasive operations, and helps to quickly recover after surgery.

[0059] The threaded section 121 of the screw 12 is usually arranged on the side of the screw 12 close to the femoral neck 3. The threaded section 121 is used to provide stable fixation and holding force when drilling into the bone, which is particularly important for the treatment of femoral neck 3 fractures, and can improve the fracture healing rate and reduce the occurrence of postoperative complications.

[0060] In some embodiments, Figure 1 As shown, the K-wire 14 of this embodiment is exposed from the locking plate 11 and is bent outside the locking plate 11 .

[0061] It is understandable that in order to enable the Kirschner wire 14 to move slightly along the axial direction of the femoral neck 3, the Kirschner wire 14 is configured to expose the locking plate 11, and after the Kirschner wire 14 is installed in place, the portion of the Kirschner wire 14 outside the locking plate 11 is bent so that the Kirschner wire 14 does not completely extend into the femur 2 during micro-pressurization, so that the end close to the locking plate 11 is separated from the locking plate 11. Therefore, the area around the end of the Kirschner wire 14 close to the femoral head 4 is full of bone, and the end of the Kirschner wire 14 away from the femoral head 4 is bent and limited to the outside of the locking plate 11, so that the Kirschner wire 14 can only move slightly along the axial direction of the femoral neck 3, ensuring the slight movement of the Kirschner wire 14 along a predetermined path, which is beneficial to the fixation and healing of fractures of the femoral neck 3 in children.

[0062] In some embodiments, Figure 1 and Figure 5 As shown, the end of the Kirschner wire 14 of this embodiment that extends into the femoral neck 3 is provided with a tip 141.

[0063] It can be understood that when the Kirschner wire 14 is inserted from the locking plate 11 into the proximal femur 2 and extended into the femoral head 4 through the femoral neck 3, the insertion path of the Kirschner wire 14 is relatively long, and the tip 141 is convenient for reducing the resistance of the Kirschner wire 14 during the insertion process, shortening the time for the Kirschner wire 14 to pass from the outside of the femur 2 to the femoral head 4, and facilitating the operation of medical workers.

[0064] Specifically, one end of the K-wire 14 of the present embodiment is a tip 141 formed by three inclined surfaces.

[0065] In some embodiments, as 1 and Figure 2 As shown, the locking plate 11 of this embodiment is further provided with a third connecting hole 113 .

[0066] The third connection hole 113 is spaced apart from the first connection hole 111 and the second connection hole 112 . The locking screw 13 passes through the third connection hole 113 and locks the locking plate 11 and the proximal end of the femur 2 .

[0067] It is understandable that the inner wall of the third connecting hole 113 is provided with an internal thread, which is threadedly connected to the external thread of the locking thread, so that the locking thread can be fixed to the third connecting hole 113, thereby locking the locking plate 11 and the proximal femur 2.

[0068] Furthermore, the third connecting hole 113 is spaced apart from the first connecting hole 111 and the second connecting hole 112 so that the locking position of the locking screw 13 on the locking plate 11 is different from the insertion position of the screw 12 and the Kirschner wire 14, so that the locking plate 11 is fixed by the screw 12 and the locking screw 13 from different positions, respectively, thereby enhancing the reliability of fixation.

[0069] In some embodiments, Figure 2As shown, the locking plate 11 of this embodiment includes a first plate body 114 and a second plate body 115 that are connected.

[0070] The first plate body 114 and the second plate body 115 are disposed at an angle, the first connection hole 111 and the second connection hole 112 are disposed in the first plate body 114 , and the third connection hole 113 is disposed in the second plate body 115 .

[0071] The first plate 114 is used to be placed at the intersection of the axial extension direction of the femoral neck 3 and the outer side of the femoral proximal end 2 .

[0072] It is understandable that since the proximal femur 2 of a child has an arc connection, in order to make the locking plate 11 fit the proximal femur 2 of the child more closely, the locking plate 11 in this embodiment is configured as a first plate body 114 and a second plate body 115 connected, and the first plate body 114 and the second plate body 115 are configured at an angle.

[0073] The first plate 114 is fitted to the axial extension direction of the femoral neck 3, so that the screw 12 and the Kirschner wire 14 installed on the first plate 114 can be set along the axial extension of the femoral neck 3, which is more conducive to the fixation and pressurization of the femoral neck 3 by the screw 12 and the Kirschner wire 14. The second plate 115 is fitted to the outer side of the proximal end of the femur 2, so that the locking screw 13 installed on the second plate 115 can pressurize and fix the proximal end of the femur 2, and the extension direction of the screw 12, the Kirschner wire 14 and the locking screw 13 is set at an angle, so that the fixing direction of the locking plate 11 is set at an angle, and the locking plate 11 is not only difficult to fall off from the proximal end of the femur 2, but also the locking plate 11 cannot rotate relative to the proximal end of the femur 2, further strengthening the fixing effect of the locking plate 11.

[0074] In some embodiments, Figure 4 As shown, the rod body of the locking screw 13 of this embodiment is fully threaded.

[0075] It is understandable that in order to ensure the tightness of the locking screw 13 to the locking plate 11, the rod body of the locking screw 13 of this embodiment is covered with threads to ensure the threaded connection between the locking screw 13 and the proximal end of the femur 2, as well as the firm connection between the locking screw 13 and the locking plate 11.

[0076] In some embodiments, Figure 4 As shown, the outer wall of the locking screw 13 of this embodiment is provided with a cutting edge 131 .

[0077] It is understandable that a cutting edge 131 is provided on the outer wall of the top end of the locking screw 13. When the locking screw 13 is screwed into the femur 2, a hole is first drilled using a drill bit whose outer diameter is smaller than that of the locking screw 13, and then the locking screw 13 is screwed into the hole. The avoidance gap in the cutting edge 131 can avoid bone chips of the femur 2 and discharge them through the avoidance gap, so as to avoid the accumulation of bone chips at the top end when the locking screw 13 is screwed in, which is more conducive to the assembly of the locking screw 13.

[0078] In some embodiments, Figure 2 As shown, the third connection hole 113 of this embodiment is in an 8-shape.

[0079] The rotation direction of the third connecting hole 113 is extended along the axial direction of the femur 2 .

[0080] It is understandable that the 8-shaped setting allows the position of the locking screw 13 relative to the locking plate 11 to be slightly adjusted along the axial direction of the femur 2. When treating a femoral neck 3 fracture combined with a proximal femur 2 fracture, the locking screw 13 can be adjusted to the fracture line of the proximal femur 2 in the 8-shaped hole to fix and pressurize the fracture line of the proximal femur 2, so that the pediatric proximal femoral top plate system 1 can also fix the proximal femoral 2 fracture at the same time, thereby expanding the scope of use of the pediatric proximal femoral top plate system 1.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A proximal femoral nail plate system for children, characterized in that: include: locking plates, screws, locking screws, and K-wires; The locking plate is used to be placed on the outer side of the proximal end of the femur, and a first connecting hole and a second connecting hole are provided on the locking plate, and the first connecting hole and the second connecting hole are arranged at intervals; At least one screw is provided, and the screw is inserted and fixed in the first connecting hole; At least one Kirschner wire is provided, and the Kirschner wire is inserted into the second connecting hole and extends into the femoral head; The screw and the Kirschner wire are arranged in parallel; The locking plate is fixed to the proximal end of the femur by the locking screw; The screw extends into the femoral neck, and the implantation length of the screw is no greater than the length from the outer side of the proximal end of the femur to one end of the femoral neck close to the femoral head.

2. The pediatric proximal femoral nail plate system according to claim 1, characterized in that: The length of the screw is less than the sum of the length from the outer side of the proximal femur to the end of the femoral neck close to the femoral head and the length of the locking plate, and is greater than the sum of the length from the outer side of the proximal femur to the midpoint of the femoral neck along the axial direction and the length of the locking plate.

3. The pediatric proximal femoral nail plate system according to claim 1 or 2, characterized in that: The screws are provided in three numbers; correspondingly, the first connection holes are also provided in three numbers; The three screws are arranged in an inverted triangle.

4. The pediatric proximal femoral nail plate system according to claim 2, characterized in that: A circular hole is arranged on the rod body section of the screw, and a threaded section is arranged on one end of the screw close to the femoral neck.

5. The pediatric proximal femoral nail plate system according to claim 1, characterized in that: The Kirschner wire is exposed from the locking plate and is bent outside the locking plate.

6. The pediatric proximal femoral nail plate system according to claim 1 or 5, characterized in that: One end of the Kirschner wire extending into the femoral neck is provided with a sharp tip.

7. The pediatric proximal femoral nail plate system according to claim 1, characterized in that: The locking plate is also provided with a third connecting hole; The third connection hole is spaced apart from the first connection hole and the second connection hole respectively; The locking screw is passed through the third connecting hole and locks the locking plate and the proximal end of the femur.

8. The pediatric proximal femoral nail plate system according to claim 7, characterized in that: The locking plate comprises a first plate body and a second plate body connected to each other; The first plate body and the second plate body are arranged at an angle, the first connection hole and the second connection hole are arranged on the first plate body, and the third connection hole is arranged on the second plate body; The first plate is used to be placed at the intersection of the axial extension direction of the femoral neck and the outer side of the proximal end of the femur.

9. The pediatric proximal femoral nail plate system according to claim 7, characterized in that: The rod body of the locking screw is fully threaded; And / or, the outer wall of the locking screw is provided with a cutting edge.

10. The pediatric proximal femoral nail plate system according to claim 7, characterized in that: The third connecting hole is in an 8-shape; The rotation direction of the third connecting hole is arranged to extend along the axial direction of the femur.

Images