CN210990652U - Hip herringbone bone screw - Google Patents
Hip herringbone bone screw Download PDFInfo
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- CN210990652U CN210990652U CN201921175602.5U CN201921175602U CN210990652U CN 210990652 U CN210990652 U CN 210990652U CN 201921175602 U CN201921175602 U CN 201921175602U CN 210990652 U CN210990652 U CN 210990652U
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Abstract
The utility model relates to the technical field of medical fixing equipment, in particular to a hip herringbone bone screw, which comprises a first screw body and a second screw body, wherein the first screw body and the second screw body are arranged in a crossed manner; the first nail body comprises a first nail head and a first screw rod connected with the first nail head, the second nail body comprises a second nail head and a second screw rod connected with the second nail head, the second nail head is provided with a first conical screw thread, the first nail head is provided with a first conical screw hole, the second nail body penetrates through the first nail head, and the second nail head is in threaded connection with the first conical screw hole through the first conical screw thread; a first through groove penetrates through the first nail body along the axial direction of the first nail body; the second nail body is provided with a second through groove along the axial direction in a penetrating manner, and the first through groove and the second through groove are used for accommodating external guide pins. The utility model discloses an order all to be used for nailing into human first nail body and second nail body interconnect and be the chevron shape after connecting to make the fixity ability of bone-knitting nail stronger under the condition that the bone-knitting nail can adapt to the minimal access surgery.
Description
Technical Field
The utility model relates to the technical field of medical fixing equipment, in particular to a hip herringbone bone screw.
Background
After the old people fall, the fracture of the hip bone is easy to happen, and when the bone is fixed in the operation, a bone screw is needed to fix the connecting position. In the existing minimally invasive surgery, one bone screw or a plurality of parallel bone screws are mostly adopted for fixation. In minimally invasive hip surgery, one end of a bone screw penetrating through the hip is located at a position where cortical bone is thick, the other end of the bone screw is located at a position where cancellous bone is thick, the cancellous bone is loose, and the fixation of the bone screw is poor, so that after the surgery is performed in the mode, the fixation of the bone screw to the bone is poor. Another surgical method is to externally reinforce the fixed plate and pass a plurality of bone screws through the same fixed plate and then through the hip. This approach is more robust, but the wound is larger and less invasive.
Disclosure of Invention
The utility model provides a hip herringbone bone screw which has good fixation performance and is suitable for minimally invasive surgery aiming at the problems in the prior art.
The utility model adopts the following technical scheme: a hip herringbone bone-knitting nail comprises a first nail body and a second nail body, wherein the first nail body and the second nail body are arranged in a crossed mode; the first nail body comprises a first nail head and a first screw rod connected with the first nail head, the second nail body comprises a second nail head and a second screw rod connected with the second nail head, the second nail head is provided with a first conical screw thread, the first nail head is provided with a first conical screw hole, the second nail body penetrates through the first nail head, and the second nail head is in threaded connection with the first conical screw hole through the first conical screw thread; a first through groove penetrates through the first nail body along the axial direction of the first nail body; the second nail body is provided with a second through groove along the axial direction in a penetrating manner, and the first through groove and the second through groove are used for accommodating external guide pins.
Preferably, the first nail head is in a spherical shape.
Preferably, the herringbone bone-knitting nail further comprises a third nail body and a fourth nail body, and the third nail body and the fourth nail body are arranged in a crossed manner; the third nail body comprises a third nail head and a third screw connected with the third nail head, the fourth nail body comprises a fourth nail head and a fourth screw connected with the fourth nail head, the fourth nail head is provided with a second tapered thread, the third nail head is provided with a second tapered screw hole, the fourth nail body penetrates through the third nail head, the fourth nail head is in threaded connection with the second tapered screw hole through the second tapered thread, the thread direction of the first screw is the same as that of the second screw, the thread direction of the third screw is the same as that of the fourth screw, and the thread direction of the first screw is opposite to that of the third screw.
Preferably, the included angle between the first nail body and the second nail body is 60 degrees, and the included angle between the third nail body and the fourth nail body is 80 degrees.
Preferably, the included angle between the first nail body and the second nail body is 60-80 degrees.
Preferably, the first head is removably attached to a tail.
Preferably, the first nail body is made of medical stainless steel or titanium alloy.
Preferably, the second nail body is made of medical stainless steel or titanium alloy.
The utility model has the advantages that: the first nail body and the second nail body which are both used for being nailed into a human body are mutually connected and form a herringbone after being connected, so that the fixation performance of the bone screw is stronger under the condition that the bone screw can adapt to a minimally invasive surgery.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a cross-sectional view of the present invention.
Fig. 3 is a schematic structural view of the second nail body of the present invention.
The reference signs are: 1. a first nail body; 11. a first head; 12. a first screw; 13. a first conical screw hole; 14. a first through groove; 2. a second nail body; 21. a second head; 22. a second screw; 23. a first tapered thread; 24. a second through groove; 3. a tail piece; 4. a third nail body; 41. a third head; 42. a third screw; 43. a second conical screw hole; 5. a fourth nail body; 51. a fourth head; 52. a fourth screw; 53. a second tapered thread.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention will be described in detail with reference to the accompanying drawings.
Example one
As shown in fig. 1 to 3, the hip herringbone bone screw comprises a first screw body 1 and a second screw body 2, wherein the first screw body 1 and the second screw body 2 are arranged in a crossed manner; the first nail body 1 comprises a first nail head 11 and a first screw rod 12 connected with the first nail head 11, the second nail body 2 comprises a second nail head 21 and a second screw rod 22 connected with the second nail head 21, the second nail head 21 is provided with a first tapered screw thread 23, the first nail head 11 is provided with a first tapered screw hole 13, the second nail body 2 penetrates through the first nail head 11, and the second nail head 21 is in threaded connection with the first tapered screw hole 13 through the first tapered screw thread 23.
When in use, the first nail body 1 is firstly nailed into the hip of a patient. Then the second nail body 2 is driven into the human body after passing through the first nail head 11 of the first nail body 1. The second nail body 2 and the first nail body 1 form a certain angle, so that the second nail body 2 can be driven into a position with thick cortical bone to ensure that the second nail body 2 has strong stability. The first nail body 1 is also stable under the fixation of the second nail body 2, so that the first nail body has stronger fixation to the hip. Only need set up in the operation two respectively do a job first nail body 1 and the little wound that second nail body 2 passed can, consequently the utility model discloses applicable in the minimal access surgery. And simultaneously, the utility model discloses in adopt be first toper screw thread 23, first toper screw thread 23 utilizes the screw thread of less number of turns just can be connected with first toper screw 13 is stable. Due to the characteristic of the conical contact surface, the connection of the first conical thread 23 and the first conical screw hole 13 can also ensure that the second nail body 2 cannot shake relative to the first nail body 1, and the stable connection between the first nail body 1 and the second nail body 2 is ensured.
As shown in fig. 2, the first nail body 1 has a first through groove 14 extending therethrough in the axial direction thereof. The second nail body 2 has a second through groove 24 penetrating along the axial direction thereof, and the first through groove 14 and the second through groove 24 are both used for accommodating an external guide pin. When the operation is performed, one end of the guide pin with a smaller diameter is inserted into the human body for positioning, and then the other end of the guide pin is inserted into the first through groove 14 of the first nail body 1 or the second through groove 24 of the second nail body 2, so that the first nail body 1 or the second nail body 2 is inserted into the human body along the guide pin, thereby preventing the first through groove 14 and the second through groove 24 from being inserted by mistake.
As shown in Figs. 1 and 2, the first head 11 is in the shape of a round ball, and when using angular heads, the patient feels uncomfortable when sitting down. The utility model discloses make first nail body 1 be the ball form, effectively improve patient's comfort.
Specifically, the included angle between the first nail body 1 and the second nail body 2 is 60-80 °. Experiment surface, when the contained angle between the first nail body 1 and the second nail body 2 was 60 to 80, the connection of the first nail body 1 and the second nail body 2 and the human body spare was more firm.
As shown in fig. 1 and 2, the tail 3 is detachably connected to the first stud 11. When the doctor uses the first nail body 1, the first screw 12 of the first nail body 1 cannot be grabbed, but the first nail head 11 of the first nail body 1 is small in size, so that the doctor is difficult to grab. The utility model discloses in, the doctor can snatch first nail body 1 through snatching the tailpiece 3, with first nail body 1 nail go into human back, with tailpiece 3 through modes such as rupture follow first pin fin 11 pull down can.
Specifically, the first nail body 1 is made of medical stainless steel or titanium alloy. The second nail body 2 is made of medical stainless steel or titanium alloy.
Example two
The difference between this embodiment and the first embodiment is: the herringbone bone-knitting nail further comprises a third nail body 4 and a fourth nail body 5, and the third nail body 4 and the fourth nail body 5 are arranged in a crossed mode; the third nail body 4 comprises a third nail head 41 and a third screw 42 connected with the third nail head 41, the fourth nail body 5 comprises a fourth nail head 51 and a fourth screw 52 connected with the fourth nail head 51, the fourth nail head 51 is provided with a second tapered thread 53, the third nail head 41 is provided with a second tapered screw hole 43, the fourth nail body 5 penetrates through the third nail head 41, the fourth nail head 51 is in threaded connection with the second tapered screw hole 43 through the second tapered thread 53, the thread direction of the first screw 12 is the same as that of the second screw 22, the thread direction of the third screw 42 is the same as that of the fourth screw 52, and the thread direction of the first screw 12 is opposite to that of the third screw 42. When the operation is carried out, after the first nail body 1 and the second nail body 2 are driven, the third nail body 4 and the fourth nail body 5 can be driven further to make the bone connection position more stable. The nailing direction of the first nail body 1 is parallel to the nailing direction of the third nail body 4. When the first nail body 1 rotates towards the screwing direction, the connection between the first nail body 1 and the human body is more and more stable; however, when the first nail body 1 rotates in the unscrewing direction, the stability of the connection between the first nail body 1 and the human body is reduced. The thread direction of the first screw 12 is opposite to that of the third screw 42, i.e. the screwing directions of the first nail body 1 and the third nail body 4 are opposite. When the human body tends to drive the first nail body 1 to move towards the screwing-out direction, the third nail body 4 can limit the movement of the human body; meanwhile, when the human body tends to drive the third nail body 4 to move towards the screwing-out direction, the first nail body 1 can limit the movement of the human body, and the first nail body 1 and the third nail body 4 supplement each other, so that the first nail body 1 and the third nail body 4 are prevented from loosening.
Specifically, the included angle between the first nail body 1 and the second nail body 2 is 60 degrees, and the included angle between the third nail body 4 and the fourth nail body 5 is 80 degrees. The contained angle between the first nail body 1 and the second nail body 2 is different with the contained angle between the third nail body 4 and the fourth nail body 5, thereby makes the utility model discloses a stability is stronger.
The above description is only for the preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention is disclosed in the preferred embodiment, it is not limited to the above description, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, but all the technical solutions of the present invention are within the scope of the present invention.
Claims (8)
1. A hip herringbone bone screw which is characterized in that: the nail comprises a first nail body (1) and a second nail body (2), wherein the first nail body (1) and the second nail body (2) are arranged in a crossed manner; the first nail body (1) comprises a first nail head (11) and a first screw rod (12) connected with the first nail head (11), the second nail body (2) comprises a second nail head (21) and a second screw rod (22) connected with the second nail head (21), the second nail head (21) is provided with a first conical thread (23), the first nail head (11) is provided with a first conical screw hole (13), the second nail body (2) penetrates through the first nail head (111), and the second nail head (121) is in threaded connection with the first conical screw hole (113) through the first conical thread (123); a first through groove (14) penetrates through the first nail body (1) along the axial direction of the first nail body; the second nail body (2) penetrates through a second through groove (24) along the axial direction of the second nail body, and the first through groove (14) and the second through groove (24) are used for accommodating external guide pins.
2. The hip herringbone bone screw of claim 1, wherein: the first nail head (11) is in a spherical shape.
3. The hip herringbone bone screw of claim 1, wherein: the herringbone bone-knitting nail further comprises a third nail body (4) and a fourth nail body (5), and the third nail body (4) and the fourth nail body (5) are arranged in a crossed mode; the third nail body (4) comprises a third nail head (41) and a third screw (42) connected with the third nail head (41), the fourth nail body (5) comprises a fourth nail head (51) and a fourth screw (52) connected with the fourth nail head (51), the fourth nail head (51) is provided with a second tapered thread (53), the third nail head (41) is provided with a second tapered screw hole (43), the fourth nail body (5) penetrates through the third nail head (41), the fourth nail head (51) is in threaded connection with the second tapered screw hole (43) through the second tapered thread (53), the thread direction of the first screw (12) is the same as that of the second screw (22), the thread direction of the third screw (42) is the same as that of the fourth screw (52), and the thread direction of the first screw (12) is opposite to that of the third screw (42).
4. A hip herringbone bone screw according to claim 3, characterized in that: the included angle between the first nail body (1) and the second nail body (2) is 60 degrees, and the included angle between the third nail body (4) and the fourth nail body (5) is 80 degrees.
5. The hip herringbone bone screw of claim 1, wherein: the included angle between the first nail body (1) and the second nail body (2) is 60-80 degrees.
6. The hip herringbone bone screw of claim 1, wherein: the first nail head (11) is detachably connected with a tail piece (3).
7. The hip herringbone bone screw of claim 1, wherein: the first nail body (1) is made of medical stainless steel or titanium alloy.
8. The hip herringbone bone screw of claim 1, wherein: the second nail body (2) is made of medical stainless steel or titanium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921175602.5U CN210990652U (en) | 2019-07-24 | 2019-07-24 | Hip herringbone bone screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921175602.5U CN210990652U (en) | 2019-07-24 | 2019-07-24 | Hip herringbone bone screw |
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| Publication Number | Publication Date |
|---|---|
| CN210990652U true CN210990652U (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921175602.5U Active CN210990652U (en) | 2019-07-24 | 2019-07-24 | Hip herringbone bone screw |
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| CN (1) | CN210990652U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110353791A (en) * | 2019-07-24 | 2019-10-22 | 任绍东 | A kind of hip herringbone bone nail |
-
2019
- 2019-07-24 CN CN201921175602.5U patent/CN210990652U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110353791A (en) * | 2019-07-24 | 2019-10-22 | 任绍东 | A kind of hip herringbone bone nail |
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