Femoral neck cutting-out prevention fixing mechanism for bridge connection and bridge connection fixing device

Abstract

The utility model relates to the technical field of medical instruments, and discloses a femoral neck anti-cutting fixing mechanism for bridge connection and a bridge connection fixing device.The femoral neck anti-cutting fixing mechanism for bridge connection comprises a femoral neck bridge connection fixing block, a fixing side plate, a first hollow nail and a second hollow nail; a dissecting body and a connecting body which are matched with each other are arranged on the outer side of the femoral neck bridge connecting and fixing block, a first nail hole matched with the first hollow nail and a second nail hole matched with the second hollow nail are formed in the dissecting body, and the fixing side plate is axially parallel to the first hollow nail on the transverse face of the femoral neck bridge connecting and fixing block. According to the femoral neck anti-cutting-out fixing mechanism for bridge connection, space multi-direction fixing is formed at the femoral neck through the first hollow nails, the second hollow nails and the side locking nails, the fixing side plates are matched with the side locking nails, the auxiliary fixing effect is achieved, the jackscrews are used for connecting the fixing side plates, and multi-space multi-direction fixing is achieved, so that structure fixing is more stable, and the fixing effect is better. The effect of avoiding loosening or cutting is achieved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a femoral neck anti-extrusion fixation mechanism and a bridging fixation device for bridging connections. Background Technology

[0002] Treatment methods for femoral neck fractures are divided into conservative treatment and surgical treatment. For unstable femoral neck fractures, surgical treatment is generally used. For patients under 60 to 65 years old, open reduction and internal fixation are often used. Currently, internal fixation for femoral neck fractures often uses a three-cannulated screw fixation technique. The screw is inserted from below the femoral trochanter, passing through the femoral trochanter, femoral neck and femoral head to fix the fracture ends. Although this technique can fix the fracture ends, because the three cannulated screws are not interconnected and there is no other support or fixation, there may be problems such as the cannulated screws being cut out or loosening during the femoral neck fracture fixation operation, which has obvious shortcomings. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a femoral neck anti-cutout fixation mechanism for bridging connections, thereby solving the problem mentioned in the background art that the hollow screw may cut out or loosen during femoral neck fracture fixation surgery.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a femoral neck anti-cutout fixation mechanism for bridging connections, comprising a femoral neck bridging fixation block, a fixation side plate, a first hollow screw, and a second hollow screw. A matching anatomical body and a connecting body are provided on the outer side of the femoral neck bridging fixation block. The anatomical body has a first screw hole that mates with the first hollow screw and a second screw hole that mates with the second hollow screw. The axial direction of the first hollow screw is at an angle of 130-140° to the longitudinal plane of the femoral neck bridging fixation block. The axial direction of the second hollow screw is at an angle of 5-10° to the axial direction of the first hollow screw on the longitudinal plane of the femoral neck bridging fixation block. The transverse plane of the femoral neck bridge connection fixation block is parallel. The axial direction of the second hollow screw and the axial direction of the first hollow screw are set at an angle of 3-10° with the femoral neck bridge connection fixation block on its transverse plane. The fixation side plate is provided with one or more side locking screw holes that cooperate with the side locking screws. The fixation side plate is parallel to the axial direction of the first hollow screw on the transverse plane of the femoral neck bridge connection fixation block. The fixation side plate is set on the longitudinal plane of the femoral neck bridge connection fixation block at the midline of the angle between the first hollow screw and the second hollow screw. The side locking screw is set at an angle of 120-150° with the fixation side plate. The connector is provided with one or more third screw holes and one or more rod block connecting devices. The third screw holes can be used to insert locking screws or fixing screws.

[0005] Preferably, the rod-block connecting device enables the femoral neck bridge connecting fixing block and the bridge connecting rod to form a fixed connection, thereby connecting different bridge connecting fixing devices.

[0006] Preferably, one end of the fixed side plate connected to the dissecting body has a trapezoidal cross section that matches the dovetail groove on the dissecting body, and is provided with a set screw hole that is threadedly connected to the set screw.

[0007] Preferably, a stress channel is provided between the second and third nail holes, and a stress groove is provided on the outer side of the femoral neck bridging fixation block.

[0008] Preferably, the interior of the anatomical body is provided with Kirschner wire holes for inserting Kirschner wires.

[0009] In addition, this utility model also provides a bridging connection fixation device, including an end block and a rod connected to the end block, wherein the end block is the aforementioned bridging connection femoral neck anti-cutout fixation mechanism.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. The bridge connection uses a femoral neck anti-cutout fixation mechanism, which forms a multi-directional spatial fixation at the femoral neck through a first hollow screw, a second hollow screw, and a side locking screw. The fixation side plate works in conjunction with the side locking screw to provide auxiliary fixation. The set screw is used to connect the fixation side plate. The multi-space and multi-directional fixation can make the structure more stable and avoid loosening or cutout. It can solve the problem of hollow screw cutout or loosening in existing techniques for femoral neck fracture fixation.

[0012] 2. The femoral neck anti-cutout fixation mechanism for bridge connection, by simultaneously fixing the side plate at the midline of the angle between the first hollow nail and the second hollow nail, can guide the placement of the first hollow nail and the second hollow nail, thus determining the fixation position of the femoral neck anti-cutout fixation mechanism for bridge connection in the femoral neck, achieving the effect of convenient fixation. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a three-dimensional schematic diagram of the femoral neck bridge connection fixation block and its related structures according to this utility model;

[0015] Figure 3 This is a three-dimensional schematic diagram of the set screw hole and related structures of this utility model.

[0016] In the figure: 1. Femoral neck bridge connection fixation block; 101. Anatomical body; 102. Connector; 103. First screw hole; 104. Second screw hole; 105. Third screw hole; 106. Rod block connection device; 107. Dovetail groove; 109. Stress side groove; 110. Stress through groove; 111. K-type pin hole; 2. Fixation side plate; 201. Side locking screw hole; 202. Set screw hole; 3. First hollow screw; 4. Second hollow screw; 5. Side locking screw; 6. Set screw. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example 1

[0019] Referring to Figures 1-3, a femoral neck anti-cutout fixation mechanism for bridging connections includes a femoral neck bridging fixation block 1, a fixation side plate 2, a first hollow screw 3, and a second hollow screw 4. A matching anatomical body 101 and a connecting body 102 are provided on the outer side of the femoral neck bridging fixation block 1. The anatomical body 101 has a first screw hole 103 that mates with the first hollow screw 3 and a second screw hole 104 that mates with the second hollow screw 4. The first hollow screw 3 is axially positioned at a 130-140° angle to the femoral neck bridging fixation block 1 in its longitudinal plane. The second hollow screw 4 is axially positioned at a 5-10° angle to the first hollow screw 3 in the longitudinal plane of the femoral neck bridging fixation block 1. The axial directions of the second hollow screw 4 and the first hollow screw 3 are aligned in the femoral neck bridging fixation block. The transverse surface of the fixing block 1 is parallel. The axial direction of the second hollow nail 4 and the axial direction of the first hollow nail 3 are set at an angle of 3-10° with the femoral neck bridge connecting fixing block 1 on its transverse surface. The fixing side plate 2 is provided with one or more side locking nail holes 201 that cooperate with the side locking nail 5. The fixing side plate 2 is parallel to the axial direction of the first hollow nail 3 on the transverse surface of the femoral neck bridge connecting fixing block 1. The fixing side plate 2 is set on the longitudinal surface of the femoral neck bridge connecting fixing block 1 at the midline of the angle between the first hollow nail 3 and the second hollow nail 4. The side locking nail 5 is set at an angle of 120-150° with the fixing side plate 2. The connecting body 102 is provided with one or more third nail holes 105 and one or more rod block connecting devices 106. The third nail holes 105 can be used to insert locking nails or fixing nails.

[0020] Specifically, the first hollow screw 3, the second hollow screw 4, and the side locking screw 4 form a multi-directional spatial fixation at the femoral neck. The connector 2 works in conjunction with the side locking screw 4 to provide auxiliary fixation. The set screw is used to connect the fixation side plate 2. Compared with existing technologies, this can solve the problem of hollow screws cutting out or loosening during femoral neck fracture fixation. At the same time, the fixation side plate 2, located at the midline of the angle between the first hollow screw 3 and the second hollow screw 4, can guide the placement of the first hollow screw 3 and the second hollow screw 4, determining the fixation position of a bridging femoral neck anti-cutout fixation mechanism at the femoral neck, thus facilitating fixation.

[0021] The first hollow nail 3 is axially connected to the femoral neck bridge fixing block 1 at an angle of 130~140° on its longitudinal plane, which can better fit the patient's femoral neck position. The connecting body 2 is provided with one or more side locking nail holes 201 that cooperate with the side locking nail 4. The side locking nail holes 201 at different positions can be selected according to the patient's actual situation to achieve better fixation effect and avoid the occurrence of cutting out.

[0022] In the embodiment: the rod connecting device 106 can make the femoral neck bridge connecting fixing block 1 and the bridge connecting rod form a fixed connection, thereby connecting different bridge connecting fixing devices;

[0023] Specifically, the rod-block connecting device 106 can be used in conjunction with the femoral neck bridge connecting fixation block 1 to form different connection methods and can connect different bridge connecting fixation devices to achieve better fixation;

[0024] In the embodiment: the fixed side plate 2 is connected to the dissecting body 101 at one end, which has a trapezoidal cross section that matches the dovetail groove 107 on the dissecting body 101, and is provided with a set screw hole 202 that is threadedly connected to the set screw.

[0025] Specifically, the reaction force of the top screw pushing against the dissecting body 101 causes the inclined surface of the trapezoidal section to compress the dovetail groove 107, thereby forming a fixed connection between the fixed side plate 2 and the dissecting body 101.

[0026] In the embodiment: a stress channel is provided through between the second nail hole 104 and the third nail hole 105, and a stress groove 109 is provided on the outer side of the femoral neck bridging fixation block.

[0027] In the embodiment: the interior of the dissecting body 101 is provided with a Kirschner wire hole 111, and the Kirschner wire hole is for inserting a Kirschner wire;

[0028] Specifically, Kirschner wires are used to fix fractures with low stress, such as short fractures or avulsion fractures. They are also used to fix temporary fracture fragments in orthopedic surgery. The anatomical body 101 has Kirschner wire holes inside, which are used to pass through the Kirschner wires to assist in fixation treatment.

[0029] Working principle: The first hollow nail 3, the second hollow nail 4, and the side locking nail 4 form a multi-directional spatial fixation at the femoral neck. The connector 2 works in conjunction with the side locking nail 4 to provide auxiliary fixation. The set screw is used to connect the connector 2. Multi-directional spatial fixation makes the structure more stable and avoids loosening or cutting out. Compared with related technologies, the femoral neck anti-cut-out fixation mechanism for bridging connection provided by this utility model has the following beneficial effects: It can solve the problem of hollow nail cutting out or loosening in the existing technology during femoral neck fracture fixation.

[0030] Example 2

[0031] A bridging connection fixation device includes an end block and two rods connected to the end block. The end block is the femoral neck anti-cutout fixation mechanism for bridging connections described in the above embodiment. The two rods connected to the end block are respectively inserted into a hole at the tail end of the femoral neck anti-cutout fixation mechanism for bridging connections and are locked and secured by fixing or tightening screws.

[0032] In use, the bridge connection is fixed to the femoral neck anti-cutout fixation mechanism and the two rods. Other required components such as sliders, hooks, and end blocks can also be fixed to the two rods as needed to form a complete bridge connection fixation device for internal fixation of the femoral neck.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art 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 appended claims and their equivalents.

Claims

1. A femoral neck anti-osteotomy fixation mechanism for bridge connection, comprising a femoral neck bridge connection fixation block (1), a fixation side plate (2), a first cannulated screw (3) and a second cannulated screw (4), characterized in that: The femoral neck bridge connecting fixed block (1) is provided with a matching anatomical body (101) and a connecting body (102) on the outside, the anatomical body (101) is provided with a first pin hole (103) matched with a first cannulated pin (3) and a second pin hole (104) matched with a second cannulated pin (4), the first cannulated pin (3) is arranged at an angle of 130-140° with the longitudinal plane of the femoral neck bridge connecting fixed block (1) in the axial direction, the second cannulated pin (4) is arranged at an angle of 5-10° with the axial direction of the first cannulated pin (3) in the longitudinal plane of the femoral neck bridge connecting fixed block (1), the axial direction of the second cannulated pin (4) and the axial direction of the first cannulated pin (3) are parallel in the transverse plane of the femoral neck bridge connecting fixed block (1), the axial direction of the second cannulated pin (4) and the axial direction of the first cannulated pin (3) are arranged at an angle of 3-10° with the transverse plane of the femoral neck bridge connecting fixed block (1), the fixed side plate (2) is provided with one or more side locking pin holes (201) matched with side locking pins (5), the fixed side plate (2) is parallel to the axial direction of the first cannulated pin (3) in the transverse plane of the femoral neck bridge connecting fixed block (1), the fixed side plate (2) is arranged on the longitudinal plane of the femoral neck bridge connecting fixed block (1) at the position of the angle bisector of the first cannulated pin (3) and the second cannulated pin (4), the side locking pin (5) is arranged at an angle of 120-150° with the fixed side plate (2), the connecting body (102) is provided with one or more third pin holes (105) and one or more rod block connecting devices (106), the third pin hole (105) can be inserted into a locking pin or a fixed pin.

2. The bridge connecting femoral neck anti-eversion fixation mechanism according to claim 1, characterized in that: The rod block connecting device (106) can form a fixed connection between the femoral neck bridge connecting fixed block (1) and the bridge connecting rod, so as to connect different bridge connecting fixed devices.

3. The bridge connecting femoral neck anti-eversion fixation mechanism according to claim 1, characterized in that: One end of the fixed side plate (2) connected with the anatomical body (101) is a trapezoidal section matched with a dovetail groove (107) on the anatomical body (101), and a jack screw hole (202) threaded with a jack screw is arranged.

4. The bridge connecting femoral neck anti-eversion fixation mechanism according to claim 1, characterized in that: A stress channel is arranged between the second pin hole (104) and the third pin hole (105), and a stress edge groove (109) is arranged on the outside of the femoral neck bridge connecting fixed block.

5. The bridge connecting femoral neck anti-eversion fixation mechanism according to claim 1, characterized in that: A Kirschner wire hole (111) is arranged in the inside of the anatomical body (101), and the Kirschner wire hole is used for inserting a Kirschner wire.

6. A bridge connecting fixture comprising an end block, a rod connected to the end block, characterized in that The end block is the bridge connecting femoral neck anti-cutting-out fixing mechanism of any one of claims 1-5.

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