CN214966495U - Novel internal fixation device for femoral neck fracture - Google Patents
Novel internal fixation device for femoral neck fracture Download PDFInfo
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- CN214966495U CN214966495U CN202120318529.3U CN202120318529U CN214966495U CN 214966495 U CN214966495 U CN 214966495U CN 202120318529 U CN202120318529 U CN 202120318529U CN 214966495 U CN214966495 U CN 214966495U
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Abstract
The utility model discloses a novel thighbone neck fracture internal fixation device, including curb plate, sleeve pipe, swash plate, main lag screw, tail nail and prevent revolving lag screw, wherein: the sleeve is integrally connected with the side plate, the sleeve is arranged at the upper part of the side plate, the sleeve is provided with a central through hole, the side plate is provided with a connecting through hole, and the connecting through hole is communicated with the central through hole of the sleeve; the main lag screw comprises a screw head and a screw rod, wherein an external thread is processed on the screw head, the screw rod is a polished rod, the screw rod is used for being inserted into a central through hole of the sleeve, a threaded hole is formed in the tail part of the main lag screw and is used for being in threaded fit with the tail screw, and a stop part is processed on the screw rod of the main lag screw; the inclined plate is integrally connected with the top of the side plate, a preset included angle is formed between the inclined plate and the side plate, the inclined plate inclines towards the direction far away from the sleeve, and the inclined plate is provided with a threaded through hole for the anti-rotation lag screw to pass through.
Description
Technical Field
The utility model relates to a fracture fixation device especially relates to a novel internal fixation of femoral neck fracture device.
Background
Femoral neck fracture is one of fractures with the most complications and the worst treatment results related to fracture of limbs, and has higher fracture non-healing rate (which can be as high as 20% to 30%) and femoral head ischemic necrosis rate of about 30% to 50% than other parts. As such, artificial joint replacement is generally the treatment of choice for patients with displaced femoral neck fractures above 65 years of age. For patients with femoral neck fractures under 65 years old, the standard treatment is to address the healing of the fractured end of the femoral neck by fracture reduction and internal fixation.
The traditional internal fixation mode of femoral neck fracture is to use three parallel half-thread hollow nails (with the thread diameter of 6.5, 7.0 or 7.3mm) to fix the fracture ends after reduction. The theoretical basis is that the static force and the dynamic pressure of the fracture end are realized by the sliding of three parallel lag screws at the far section of the far fracture, so as to promote the healing of the fracture. However, the internal fixation of the hollow nail has the following two problems: firstly, three screws are independent respectively, and for unstable femoral neck fracture (non-anatomical reduction and fracture end with crushed bone block and defect), the overall mechanical stability of the nail-bone structure is not enough, so that the absolute stability of the fracture end can not be ensured, and the inversion stress can not be effectively resisted, thereby causing fracture nonunion. And excessive nail withdrawing caused by parallel sliding of the screw leads to obvious shortening of the femoral neck, so that even if fracture healing is achieved, high-quality healing is not achieved, and limb length, gait and hip joint dysfunction still exist.
Therefore, the utility model provides a novel internal fixation device for femoral neck fracture, which can improve the overall mechanical stability of the nail-bone structure and prevent the occurrence of the phenomenon of excessive nail withdrawing.
SUMMERY OF THE UTILITY MODEL
In order to realize the purpose of the utility model, the following technical scheme is adopted to realize:
the utility model provides a novel thighbone neck fracture internal fixation device, includes the curb plate, the sleeve pipe, the swash plate, main lag screw, the tail nail with prevent revolving lag screw, wherein: the sleeve is integrally connected with the side plate, the sleeve is arranged at the upper part of the side plate, the sleeve is provided with a central through hole, the side plate is provided with a connecting through hole, and the connecting through hole is communicated with the central through hole of the sleeve; the main lag screw comprises a screw head and a screw rod, wherein an external thread is processed on the screw head, the screw rod is a polished rod, the screw rod is used for being inserted into the central through hole of the sleeve, a threaded hole is formed in the tail part of the screw rod of the main lag screw and is used for being in threaded fit with the tail screw, and a stop part is processed on the screw rod of the main lag screw; the inclined plate is integrally connected with the top of the side plate, a preset included angle is formed between the inclined plate and the side plate, the inclined plate inclines towards the direction far away from the sleeve, and a threaded through hole is formed in the inclined plate and used for allowing the anti-rotation tension screw to penetrate through the threaded through hole; one or more mounting through holes are formed in the lower portion of the side plate and used for mounting fixing screws.
Novel femoral neck fracture internal fixation device, wherein: the included angle between the sleeve and the side plate is 125 degrees or 130 degrees.
Novel femoral neck fracture internal fixation device, wherein: the cross section of the central through hole of the sleeve is non-circular, the cross section of the screw rod of the main tension screw is the same as the cross section of the central through hole of the sleeve in shape, the size of the screw rod of the main tension screw is slightly smaller than that of the central through hole, and the lower part of the screw rod of the main tension screw is slidably inserted into the central through hole of the sleeve.
Novel femoral neck fracture internal fixation device, wherein: the structure of the stop member comprises a ring of convex rings, steps or a plurality of bulges.
Novel femoral neck fracture internal fixation device, wherein: the included angle between the inclined plate and the side plate is 120 degrees.
Novel femoral neck fracture internal fixation device, wherein: the anti-rotation lag screw comprises a screw head and a screw rod, wherein an external thread is processed on the screw head, and the screw rod is a polished rod.
Novel femoral neck fracture internal fixation device, wherein: the axial line of the thread through hole on the inclined plate and the axial line of the main lag screw form a non-coplanar straight line in space.
Novel femoral neck fracture internal fixation device, wherein: the included angle range between the axis of the thread through hole on the inclined plate and the axis of the main lag screw is more than or equal to 10 degrees and less than or equal to 20 degrees.
Novel femoral neck fracture internal fixation device, wherein: and an included angle between the axis of the threaded through hole on the inclined plate and the axis of the main lag screw is 15 degrees.
Novel femoral neck fracture internal fixation device, wherein: the cross section of the central through hole of the sleeve is in a shape that two opposite ends are circular arcs and the other two opposite ends are parallel straight lines.
Drawings
FIG. 1 is a schematic view of the overall structure of a novel internal fixation device for femoral neck fracture;
fig. 2 is a side view of the novel femoral neck fracture internal fixation device.
Detailed Description
The following describes in detail embodiments of the present invention with reference to fig. 1-2.
As shown in fig. 1-2, the novel internal fixation device for femoral neck fracture comprises a side plate 1, a sleeve 2, an inclined plate 6, a main lag screw 3, a tail nail 4 and an anti-rotation lag screw 5. The novel internal fixing device for femoral neck fracture can be made of titanium alloy or stainless steel.
The main tension screw 3 comprises a screw head 31 and a screw rod 32, wherein an external thread is processed on the screw head 31, the screw rod 32 is a polished rod, the cross section of the screw rod 32 is the same as the cross section of the central through hole 21 of the sleeve 2, and the size of the screw rod is slightly smaller than that of the central through hole 21, when in use, the lower part of the screw rod 32 is slidably inserted into the central through hole 21 of the sleeve 2, a stop part 33 is processed on the screw rod 32, the stop part 33 protrudes outwards from the surface of the screw rod 31, the protruding top end of the stop part is higher than the hole of the central through hole 21, and the stop part 21 can be a ring, a step, a plurality of protrusions and the like. The tail part of the main lag screw 3 is provided with a threaded hole 34 for being in threaded fit with the tail nail 4.
Swash plate 6 and 1 top body coupling of curb plate, the two integrated into one piece, swash plate 6 to keeping away from the direction slope of sleeve 2, has a predetermined contained angle between swash plate 6 and the curb plate 1, the contained angle is 120 degrees, and it has a screw thread through-hole 61 to open on the swash plate 6 for supply to prevent turning force screw 5 and pass from wherein, prevent turning force screw 5 and include screwhead 51 and screw rod 52, processing has the external screw thread on the screwhead 51, and screw rod 52 is the polished rod. The axial line of the threaded through hole 61 and the axial line of the main lag screw 3 form a non-coplanar straight line in space, and the included angle between the axial line of the threaded through hole 61 and the axial line of the main lag screw 3 is 10-20 degrees, preferably 15 degrees. The lower part of the side plate 1 is provided with one or more mounting through holes 12 for mounting fixing screws (not shown).
Novel internal fixation of femoral neck fracture device when the operation uses: after the femoral neck fracture part is reset, a main lag screw is firstly screwed into the fractured bone to reset and fix the fracture part, a sleeve is sleeved on a screw rod of the main lag screw, the main lag screw can be prevented from rotating because the cross section of a central through hole is non-circular, and a tail screw is inserted into a connecting through hole of a side plate and then screwed into a threaded hole of the main lag screw to provide tension for the main lag screw so as to better connect the fractured bone; the inclined plate is attached to the tuberosity, the anti-rotation lag screw is screwed into holes which are drilled on the tuberosity and the femoral head in advance along the angle of the axis of the side plate thread through hole from the side plate thread through hole until the anti-rotation lag screw is screwed on the femoral head, and in the process, the thread is processed on the side plate through hole, so that the anti-rotation lag screw can be ensured to enter the skeleton along the angle of the axis of the side plate thread through hole, a preset space included angle can be kept between the installed anti-rotation lag screw and the main lag screw, the rotation of the broken bone part is effectively prevented, and the stability of the nail-bone structure is ensured; the fixation screws are then screwed into the patient's femur from the mounting through holes of the side plates to secure the side plates. After the femoral neck fracture operation was accomplished, along with the healing gradually of fracture position, main lag screw can slide to the direction of skin outward gradually, when the stop part contacted with the sleeve, can prevent main lag screw's further slip, avoids the obvious shortened emergence of the condition of femoral neck, prevents simultaneously to revolve lag screw owing to only the screwhead is equipped with the screw thread, and the screw pole is the polished rod, therefore the screw pole can slide thereupon in the screw through-hole of swash plate, can not block main lag screw and slide.
Through the utility model discloses, can provide the whole mechanics stability of good nail-bone structure for the operation of femoral neck fracture is fixed, effectively prevent the emergence of the obvious shortening condition of femoral neck.
Claims (10)
1. The utility model provides a novel thighbone neck fracture internal fixation device, includes the curb plate, the sleeve pipe, the swash plate, main lag screw, the tail nail with prevent revolving lag screw, its characterized in that: the sleeve is integrally connected with the side plate, the sleeve is arranged at the upper part of the side plate, the sleeve is provided with a central through hole, the side plate is provided with a connecting through hole, and the connecting through hole is communicated with the central through hole of the sleeve; the main lag screw comprises a screw head and a screw rod, wherein an external thread is processed on the screw head, the screw rod is a polished rod, the screw rod is used for being inserted into the central through hole of the sleeve, a threaded hole is formed in the tail part of the screw rod of the main lag screw and is used for being in threaded fit with the tail screw, and a stop part is processed on the screw rod of the main lag screw; the inclined plate is integrally connected with the top of the side plate, a preset included angle is formed between the inclined plate and the side plate, the inclined plate inclines towards the direction far away from the sleeve, and a threaded through hole is formed in the inclined plate and used for allowing the anti-rotation tension screw to penetrate through the threaded through hole; one or more mounting through holes are formed in the lower portion of the side plate and used for mounting fixing screws.
2. The novel femoral neck fracture internal fixation device of claim 1, wherein: the included angle between the sleeve and the side plate is 125 degrees or 130 degrees.
3. The novel femoral neck fracture internal fixation device of claim 1, wherein: the cross section of the central through hole of the sleeve is non-circular, the cross section of the screw rod of the main tension screw is the same as the cross section of the central through hole of the sleeve in shape, the size of the screw rod of the main tension screw is slightly smaller than that of the central through hole, and the lower part of the screw rod of the main tension screw is slidably inserted into the central through hole of the sleeve.
4. The novel femoral neck fracture internal fixation device of claim 1, wherein: the structure of the stop member comprises a ring of convex rings, steps or a plurality of bulges.
5. The novel femoral neck fracture internal fixation device of claim 1, wherein: the included angle between the inclined plate and the side plate is 120 degrees.
6. The novel femoral neck fracture internal fixation device of claim 1, wherein: the anti-rotation lag screw comprises a screw head and a screw rod, wherein an external thread is processed on the screw head, and the screw rod is a polished rod.
7. The novel femoral neck fracture internal fixation device of claim 1, wherein: the axial line of the thread through hole on the inclined plate and the axial line of the main lag screw form a non-coplanar straight line in space.
8. The novel femoral neck fracture internal fixation device of claim 7, wherein: the included angle range between the axis of the thread through hole on the inclined plate and the axis of the main lag screw is more than or equal to 10 degrees and less than or equal to 20 degrees.
9. The novel femoral neck fracture internal fixation device of claim 7, wherein: and an included angle between the axis of the threaded through hole on the inclined plate and the axis of the main lag screw is 15 degrees.
10. The novel femoral neck fracture internal fixation device of claim 3, wherein: the cross section of the central through hole of the sleeve is in a shape that two opposite ends are circular arcs and the other two opposite ends are parallel straight lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120318529.3U CN214966495U (en) | 2021-02-04 | 2021-02-04 | Novel internal fixation device for femoral neck fracture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120318529.3U CN214966495U (en) | 2021-02-04 | 2021-02-04 | Novel internal fixation device for femoral neck fracture |
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| Publication Number | Publication Date |
|---|---|
| CN214966495U true CN214966495U (en) | 2021-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120318529.3U Active CN214966495U (en) | 2021-02-04 | 2021-02-04 | Novel internal fixation device for femoral neck fracture |
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|---|---|
| CN (1) | CN214966495U (en) |
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2021
- 2021-02-04 CN CN202120318529.3U patent/CN214966495U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Mao Yujiang Inventor after: Jiang Yao Inventor after: Gong Maoqi Inventor after: Jiang Xieyuan Inventor before: Mao Yujiang |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220121 Address after: 100035 No. 31 East Xinjiekou street, Beijing, Xicheng District Patentee after: BEIJING JISHUITAN Hospital Address before: 100195 room 602, unit 3, building 10, Changqingyuan Third District, Haidian District, Beijing Patentee before: Mao Yujiang |