Internal fixation structure for treating femoral neck and intertrochanteric fracture

Abstract

The utility model relates to the technical field of fracture fixation, in particular to an internal fixation structure for treating femoral neck and intertrochanteric fracture, which comprises a guide frame and an inner nail, the inner nail is arranged on the left side of the guide frame, holes are arranged on the inner nail and the guide frame, a connector is arranged above the inner nail, the inner nail is connected with the guide frame through the connector, and the inner nail is connected with the guide frame through the connector. An inner nail is arranged on the guide frame, the guide frame can be detached from the inner nail, a mounting seat is arranged below the guide frame and located between the inner nail and the guide frame, a reinforcing plate is arranged below the mounting seat, reinforcing protection is provided for the fracture position through the reinforcing plate, and a movable adjusting mechanism is arranged above the reinforcing plate. According to the internal fixing structure for treating the femoral neck and intertrochanteric fracture, large-area fixation can be provided for the fracture and fragmentation position through the reinforcing plate, fixation is more stable and reliable compared with screw fixation, the reinforcing plate can be connected with the guide frame for use, and the stability of the reinforcing plate can be kept during follow-up installation.

Description

Technical Field

[0001] The utility model relates to the technical field of fracture fixation, in particular to an internal fixation structure for treating femoral neck and intertrochanteric fractures. Background Art

[0002] When treating fractures of the femoral neck and intertrochanteric fractures, severe fractures require fixation with a fixation device to fix the fracture site, thereby avoiding subsequent complications such as femoral head necrosis. Application number CN200920254062.X, disclosed on July 14, 2010, is a triangular support intramedullary nail for treating fractures of the femoral neck and intertrochanteric fractures, which is used to provide an instrument for treating fractures of the femoral neck and intertrochanteric fractures with good fixation stability, high fixation strength, and not easy to be damaged or broken. Its technical solution is: it consists of an intramedullary nail, a positioning screw, and a support screw. A positioning hole and a support hole are opened on the nail body of the intramedullary nail. The support hole is above or below the positioning hole. The positioning hole and the support hole pass through the axis of the intramedullary nail body at an angle and are on the same spatial plane. The apertures of the positioning hole and the support hole match the diameters of the positioning screw and the support screw. There is also a connecting side hole at the front end of the positioning screw. The positioning screw and the support screw intersect and connect after passing through the intramedullary nail. With this structure, the positioning screw and the support screw pass through the intramedullary nail and are connected to form a triangular support structure, which provides stable support and firm fixation for femoral neck and intertrochanteric fractures;

[0003] When using screws to fix fractures, the current fixation structure fixes the bone through the pulling effect of the screw end. However, when the fixation is severely damaged or the fragments are small, the fixation range of a single screw is limited and the fixation effect on the bone is poor. Using multiple sets of screws will also increase the operation time and difficulty. Utility Model Content

[0004] The purpose of the present utility model is to provide an internal fixation structure for treating femoral neck and intertrochanteric fractures, so as to solve the problem proposed in the above-mentioned background art that the current fixation structure fixes the bone by the pulling effect of the screw end when fixing the fracture with screws, but when the fixation is severely damaged or the fracture is relatively fine, the fixation range of a single screw is limited, resulting in a poor fixation effect on the bone.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an internal fixation structure for treating femoral neck and intertrochanteric fractures, comprising a guide frame and an internal nail, wherein the internal nail is arranged on the left side of the guide frame, and holes are provided on the internal nail and the guide frame, a connecting head is provided above the internal nail, and the internal nail is connected to the guide frame through the connecting head, so that the guide frame can be disassembled on the internal nail, a mounting seat is provided below the guide frame, and the mounting seat is located between the internal nail and the guide frame, and a reinforcement plate is provided below the mounting seat, which provides reinforcement protection for the fracture site, and a movable adjustment mechanism is provided above the reinforcement plate, and the position of the reinforcement plate is adjusted by the movable adjustment mechanism.

[0006] Further optimizing the technical solution, the movable adjustment mechanism includes an angle adjustment mechanism and a telescopic adjustment mechanism;

[0007] An angle adjustment mechanism is provided inside the mounting base to adjust the angle of the reinforcement plate;

[0008] The telescopic adjustment mechanism is arranged below the angle adjustment mechanism and connected to the reinforcement plate to adjust the height position of the reinforcement plate.

[0009] To further optimize this technical solution, the angle adjustment mechanism includes a movable ball and a first locking rod;

[0010] The movable ball is arranged inside the mounting seat and forms a rotation connection between the mounting seat;

[0011] The first locking rod is arranged on the front side of the movable ball, and the front end of the first locking rod passes through the mounting seat and forms a threaded connection between the mounting seat, and the rear end of the first locking rod is made of rubber material.

[0012] To further optimize the technical solution, the telescopic adjustment mechanism includes a first connecting rod, a second connecting rod and a second locking rod;

[0013] A first connecting rod is fixed below the movable ball;

[0014] The second connecting rod is arranged inside the first connecting rod, and the lower end of the second connecting rod passes through the first connecting rod and forms an up-and-down sliding connection between the first connecting rod;

[0015] The second locking rod is arranged below the first connecting rod and is threadedly connected with the first connecting rod.

[0016] To further optimize the technical solution, the second connecting rod and the first connecting rod are rotationally connected, and the upper end of the second connecting rod is designed as an enlarged structure.

[0017] To further optimize this technical solution, a docking block is fixed to the lower end of the second connecting rod, a docking groove is provided above the reinforcement plate, and a concave-convex matching structure is formed between the docking groove and the docking block, and a locking mechanism is provided inside the docking groove to lock the connection between the docking block and the docking groove.

[0018] Further optimizing the technical solution, the locking mechanism includes a limit slot, a limit block, a return spring, a control rope and a movable block;

[0019] A limiting groove is provided inside the docking groove;

[0020] The limit block is arranged inside and between the docking blocks to form a front-to-back sliding structure, and the outer end of the limit block is designed in an inclined structure;

[0021] A return spring is provided at the inner end of the limit block to provide thrust for the limit block;

[0022] A control rope is fixed to the inner end of the limit block to control the movement of the limit block;

[0023] The movable block is arranged above the docking block, and the movable block is connected to the upper end of the control rope.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] (1) The reinforcement plate can provide a large area of ​​fixation for the fracture fragments, which is more stable and reliable than screw fixation. The reinforcement plate can be connected to the guide frame so that the reinforcement plate can maintain its own stability during subsequent installation.

[0026] (2) The guide frame provides guidance for the subsequent installation of screws, and the guide frame can also provide support for the fixing plate, thereby improving the convenience of subsequent use;

[0027] (3) By rotating the movable ball and flexibly adjusting the angle of the reinforcement plate, it can be placed in a fixed position and fixed with the first locking rod to ensure its stability;

[0028] (4) The height position of the reinforcement plate can be adjusted by the nested connection between the first connecting rod and the second connecting rod. The position of the reinforcement plate can be adjusted in multiple directions by the rotation of the movable ball, which makes it more adaptable. The reinforcement plate can be extended and locked by the second locking rod.

[0029] (5) The reinforcement plate can be installed by connecting the docking block and the docking groove and the limit block. The connection between the docking block and the docking groove can be released by controlling the movement of the limit block, thereby disassembling the reinforcement plate and facilitating the subsequent removal of the guide frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1This is a schematic diagram of the three-dimensional structure of the utility model;

[0031] Figure 2 This is a side view structural diagram of the utility model;

[0032] Figure 3 This is a side structural diagram of the reinforcement plate of the utility model;

[0033] Figure 4 This is a schematic diagram of the side cross-section structure of the mounting seat of the utility model;

[0034] Figure 5 This is a schematic diagram of the top view of the reinforcement plate of the utility model;

[0035] Figure 6 This is a schematic diagram of the side sectional structure of the docking block of the present invention.

[0036] In the figure: 1. Guide frame; 2. Inner nail; 3. Connector; 4. Mounting seat; 5. Reinforcement plate; 6. Movable ball; 7. First connecting rod; 8. Second connecting rod; 9. First locking rod; 10. Second locking rod; 11. Docking block; 12. Docking groove; 13. Limiting groove; 14. Limiting block; 15. Return spring; 16. Control rope; 17. Movable block. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] See also Figures 1-6 The present invention provides the following technical solutions: an internal fixation structure for treating femoral neck and intertrochanteric fractures, comprising a guide frame 1 and an internal nail 2, wherein the internal nail 2 is arranged on the left side of the guide frame 1, and holes are formed on both the internal nail 2 and the guide frame 1;

[0039] Example 1:

[0040] The present invention provides a technical solution, which discloses that a connecting head 3 is provided above the inner nail 2, and the inner nail 2 is connected to the guide frame 1 through the connecting head 3, so that the guide frame 1 can be disassembled on the inner nail 2, and a mounting seat 4 is provided below the guide frame 1, and the mounting seat 4 is located between the inner nail 2 and the guide frame 1, and a reinforcement plate 5 is provided below the mounting seat 4, which provides reinforcement protection for the fracture site, and a movable adjustment mechanism is provided above the reinforcement plate 5, and the position of the reinforcement plate 5 is adjusted by the movable adjustment mechanism;

[0041] When in use, the guide frame 1 can be connected to the inner nail 2 through the connecting head 3, and the inner nail 2 can be installed. At the same time, the reinforcement plate 5 under the guide frame 1 can be attached to the side of the bone body to provide fixed protection for the bone body. The position of the reinforcement plate 5 can be adjusted by the movable adjustment mechanism before installation to ensure that the subsequent nail body can pass through stably. After the nail body is driven in, the connection between the reinforcement plate 5 and the inner nail 2 and the guide frame 1 is released, and the guide frame 1 can be removed.

[0042] Example 2:

[0043] On the basis of embodiment 1, the disclosed movable adjustment mechanism includes an angle adjustment mechanism and a telescopic adjustment mechanism. The angle adjustment mechanism is arranged inside the mounting seat 4 to adjust the angle of the reinforcement plate 5. The telescopic adjustment mechanism is arranged below the angle adjustment mechanism and connected to the reinforcement plate 5 to adjust the height position of the reinforcement plate 5. The angle adjustment mechanism includes an active ball 6 and a first locking rod 9. The active ball 6 is arranged inside the mounting seat 4 and forms a rotation connection between the mounting seat 4. The first locking rod 9 is arranged on the front side of the active ball 6, and the front end of the first locking rod 9 passes through the mounting seat 4 and forms a thread between the mounting seat 4. The telescopic adjustment mechanism comprises a first connecting rod 7, a second connecting rod 8 and a second locking rod 10. The first connecting rod 7 is fixed below the movable ball 6, and the second connecting rod 8 is arranged inside the first connecting rod 7. The lower end of the second connecting rod 8 passes through the first connecting rod 7 and the first connecting rod 7 to form an up and down sliding connection. The second locking rod 10 is arranged below the first connecting rod 7 and between the first connecting rod 7 to form a threaded connection. The second connecting rod 8 and the first connecting rod 7 are connected in a rotating manner, and the upper end of the second connecting rod 8 is designed in an enlarged structure.

[0044] When the reinforcement plate 5 needs to be adjusted, the reinforcement plate 5 can be rotated to drive the movable ball 6 to rotate, and the angular direction of the reinforcement plate 5 can be adjusted. By pulling the reinforcement plate 5, the second connecting rod 8 can be driven to move vertically inside the first connecting rod 7 to adjust the height position of the reinforcement plate 5. After adjusting to the required position, the first locking rod 9 and the second locking rod 10 can be rotated to fix the movable ball 6 and the second connecting rod 8, so that the position of the reinforcement plate 5 remains stable, which is convenient for subsequent operations.

[0045] Example 3:

[0046] On the basis of embodiment 2, a docking block 11 is fixed to the lower end of the second connecting rod 8, and a docking groove 12 is provided above the reinforcing plate 5, and a concave-convex matching structure is formed between the docking groove 12 and the docking block 11, and a locking mechanism is provided inside the docking groove 12 to lock the connection between the docking block 11 and the docking groove 12. The locking mechanism includes a limit groove 13, a limit block 14, a return spring 15, a control rope 16 and a movable block 17. The limit groove 13 is provided inside the docking groove 12, and the limit block 14 is provided inside and between the docking block 11 to form a forward and backward sliding structure, and the outer end of the limit block 14 is designed in an inclined structure. The return spring 15 is provided at the inner end of the limit block 14 to provide thrust for the limit block 14. The control rope 16 is fixed at the inner end of the limit block 14 to control the movement of the limit block 14. The movable block 17 is provided above the docking block 11, and the upper end of the movable block 17 and the control rope 16 are connected;

[0047] The docking block 11 is fixed in the docking groove 12 by the connection between the limit block 14 and the limit groove 13, so that the reinforcement plate 5 can be installed. After the reinforcement plate 5 is fixed, the movable block 17 can be pulled to move the limit block 14 through the control rope 16, thereby releasing the connection between the limit block 14 and the limit groove 13. Then, the docking block 11 can be taken out of the docking groove 12 and the reinforcement plate 5 can be removed.

[0048] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0049] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An internal fixation structure for treating femoral neck and intertrochanteric fractures, comprising a guide frame (1) and an internal nail (2), wherein the internal nail (2) is arranged on the left side of the guide frame (1), and holes are provided on the internal nail (2) and the guide frame (1); Features: A connecting head (3) is arranged above the inner nail (2), and the inner nail (2) is connected to the guide frame (1) via the connecting head (3), so that the guide frame (1) can be disassembled on the inner nail (2); a mounting seat (4) is arranged below the guide frame (1), and the mounting seat (4) is located between the inner nail (2) and the guide frame (1); a reinforcing plate (5) is arranged below the mounting seat (4), and the reinforcing plate (5) is used to provide reinforcement protection for the fracture site, and a movable adjustment mechanism is arranged above the reinforcing plate (5), and the position of the reinforcing plate (5) is adjusted by the movable adjustment mechanism.

2. An internal fixation structure for treating femoral neck and intertrochanteric fractures according to claim 1, characterized in that: The movable adjustment mechanism includes an angle adjustment mechanism and a telescopic adjustment mechanism; An angle adjustment mechanism is arranged inside the mounting seat (4) to adjust the angle of the reinforcement plate (5); The telescopic adjustment mechanism is arranged below the angle adjustment mechanism and connected to the reinforcement plate (5) to adjust the height position of the reinforcement plate (5).

3. An internal fixation structure for treating femoral neck and intertrochanteric fractures according to claim 2, characterized in that: The angle adjustment mechanism comprises a movable ball (6) and a first locking rod (9); A movable ball (6) is arranged inside the mounting seat (4) and is rotatably connected with the mounting seat (4); The first locking rod (9) is arranged on the front side of the movable ball (6), and the front end of the first locking rod (9) passes through the mounting seat (4) and forms a threaded connection between the mounting seat (4), and the rear end of the first locking rod (9) is made of rubber material.

4. An internal fixation structure for treating femoral neck and intertrochanteric fractures according to claim 3, characterized in that: The telescopic adjustment mechanism comprises a first connecting rod (7), a second connecting rod (8) and a second locking rod (10); A first connecting rod (7) is fixed below the movable ball (6); A second connecting rod (8) is arranged inside the first connecting rod (7), and the lower end of the second connecting rod (8) passes through the first connecting rod (7) and forms an up-and-down sliding connection between the first connecting rod (7); The second locking rod (10) is arranged below the first connecting rod (7) and is threadedly connected with the first connecting rod (7).

5. An internal fixation structure for treating femoral neck and intertrochanteric fractures according to claim 4, characterized in that: The second connecting rod (8) and the first connecting rod (7) are rotatably connected, and the upper end of the second connecting rod (8) is designed to be an enlarged structure.

6. An internal fixation structure for treating femoral neck and intertrochanteric fractures according to claim 4 or 5, characterized in that: A docking block (11) is fixed to the lower end of the second connecting rod (8), a docking groove (12) is provided above the reinforcing plate (5), and a concave-convex matching structure is formed between the docking groove (12) and the docking block (11), and a locking mechanism is provided inside the docking groove (12) to lock the connection between the docking block (11) and the docking groove (12).

7. An internal fixation structure for treating femoral neck and intertrochanteric fractures according to claim 6, characterized in that: The locking mechanism comprises a limiting groove (13), a limiting block (14), a return spring (15), a control rope (16) and a movable block (17); A limiting groove (13) is provided inside the docking groove (12); A limit block (14) is arranged inside the docking block (11) and between the docking blocks (11) to form a front-rear sliding structure, and the outer end of the limit block (14) is designed to be inclined; A return spring (15) is arranged at the inner end of the limit block (14) to provide thrust for the limit block (14); A control rope (16) is fixed to the inner end of the limit block (14) to control the movement of the limit block (14); The movable block (17) is arranged above the docking block (11), and the movable block (17) is connected to the upper end of the control rope (16).

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