CN102908184B - Pedicle screw assembly - Google Patents
Pedicle screw assembly Download PDFInfo
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- CN102908184B CN102908184B CN201210465562.4A CN201210465562A CN102908184B CN 102908184 B CN102908184 B CN 102908184B CN 201210465562 A CN201210465562 A CN 201210465562A CN 102908184 B CN102908184 B CN 102908184B
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- extension tube
- nail
- pedicle
- union joint
- pedicle nail
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Abstract
The invention discloses an extension tube, which is a flexible extension tube and arranged on the tail of a pedicle screw. In an operation process, after the pedicle screw is implanted, the pedicle screw on the same side or opposite side of the spinal column (or other bones) is arranged at an large angle, and when the extension tube has chiasma interference, medical staff can apply an external force to deform the flexible extension tube to achieve the state of mutual noninterference; and after the extension tube does not interfere mutually, the medical staff can smoothly connect a connection device to the extension tube, moves along the extension tube to realize connection with the tail of the pedicle screw, and performs compression, dilation, pressurization and other actions under a noninterference situation. Therefore, the operation difficulty and operation risk can be reduced by virtue of the flexible extension tube. The invention also discloses a connector, an extension tube component and a pedicle screw assembly.
Description
Technical field
The present invention relates to technical field of medical instruments, particularly a kind of pedicle screw component.
Background technology
Along with spinal biomechanics research and the development of material science, internal fixation of spine technology achieves huge advance, in spinal column degenerative disease, tumor of spine, wound, and has a wide range of applications in the operative treatment such as Spondylitis.
Internal fixation of spine technology simply can be summarised as two steps: 1) plant nail, different vertebral bodys or fracture two ends bone block on implant pedicle nail formed hold be anchored; 2) mounted connector, is arranged on pedicle nail by connecting devices such as steel plate, rod or steel wires, by compression, struts or reverses relative position between each anchor node thus carry out the rectification to bone structure, then locks each anchor node and forms overall internal fixtion structure.
Please refer to Fig. 1-2, Fig. 1 is the scheme of installation of reposition lever and pedicle nail; Fig. 2 is the structural representation that the extension tube 3 of pedicle nail nail tail is intersected.
For the ease of realizing the connection of connecting device and pedicle nail 25 in operation, the nail tail of pedicle nail 25 has extension tube 23, and as shown in Figure 1, extension tube 23 is one-body molded with the rivet nut of pedicle nail 25.
The step of operation technique is:
1, Preoperative Method.Mainly carry out the selection of pedicle nail 25 (length and diameter);
2, pedicle nail 25 is located and is followed closely preparation;
3, implant in pedicle nail 25, Fig. 1, spinal column two pleurocentrum 24 all implants pedicle nail 25;
4, curved rod, dress rod.Be connected with pedicle nail 25 by reposition lever 21 (one of connecting device), reposition lever 21 is provided with at least two connectors 22, connector 22 has through hole 221, during connection, the extension tube 23 of two or more pedicle nails 25 inserted respectively in the through hole 221 of a connection piece 22, then connector 22 constantly can press down close to pedicle nail 25 afterbody along extension tube 23;
5, pressure bar, temporary lock.Continue to press down connector 22, until pedicle nail 25 afterbody insert connector 22 through hole 221 in, pedicle nail 25 afterbody is provided with external screw thread, by bolt by connector 22 temporary locking between afterbody and bolt;
6, orthopedic reset (strut/pressurize) is carried out.After reset, tight a bolt further, to realize final locking.
As shown in the above, extension tube 23 serves good guide effect, so that ensure in operation process can fast and be successfully connected with pedicle nail 25 by reposition lever 21.
But, when carrying out such operation, often need in the both sides of spinal column all by reposition lever 21 maintenance, then both sides all need to implant pedicle nail 25, according to spinal column position and rectification needs, both sides pedicle nail 25 may be wide-angle state, as described in Figure 2, namely both sides pedicle nail 25, ailhead mutually close in nail tail away from state; In fact, the pedicle nail 25 of the same side also may wide-angle be implanted.Now, may there is chiasm interference in the extension tube 23 that pedicle nail 25 follows closely tail, add operating difficulty, and surgical risk is corresponding improve also.
In view of this, how to avoid the chiasm interference of pedicle nail nail tail extension tube in operation process, reducing operation risk, is those skilled in the art's technical issues that need to address.
Summary of the invention
For solving the problems of the technologies described above, object of the present invention is for providing a kind of extension tube, the union joint that are arranged at pedicle nail nail tail, and extension tube component, pedicle screw component.This extension tube can avoid chiasm interference in operation process, thus reduces operating difficulty, reduces operation risk.
Extension tube provided by the invention, is arranged at the nail tail of pedicle nail, and extension tube is flexible extension tube.
In operation process, after implanting pedicle nail, the pedicle nail being positioned at spinal column (also can be other bone blocks) homonymy or heteropleural is that wide-angle is arranged, and when causing extension tube to occur chiasm interference, medical worker can impose external force, make flexible extension tube distortion and reach non-interference state.After extension tube is non-interference, connecting device can successfully be connected in extension tube by medical worker, and then moves to realize being connected with the afterbody of pedicle nail along extension tube, and pressure bar can be carried out when non-interference, strut, the action such as pressurization.Visible, flexible extension tube reduces the difficulty of operation, reduces the risk of operation.
The present invention also provides a kind of above-mentioned extension tube and pedicle nail to follow closely the union joint of tail, and its one end is first external thread section that can insert pedicle nail nail tail internal thread hole, and the other end of described union joint is crimped in the tube chamber of described extension tube one end.
Union joint one end is threaded with the nail tail of pedicle nail, is easy to realize, and is crimped in extension tube by the other end of union joint, to realize interference fit, is also easy to realize.Therefore the union joint of this structure, achieve the connection of flexible extension tube and pedicle nail easily, and the structure of union joint is simple, is easy to processing.
Preferably, the one end described union joint is connected with described extension tube is the second external thread section.
Preferably, described union joint has axially extending bore.
The present invention also provides a kind of extension tube component, comprises extension tube, and described extension tube is flexible extension tube; Also comprise the union joint for connecting described extension tube and pedicle nail nail tail, its one end is first external thread section that can insert pedicle nail nail tail internal thread hole, and the other end of described union joint is crimped in the tube chamber of described extension tube one end.
Because above-mentioned extension tube has above-mentioned technique effect, the extension tube component with this extension tube also has identical technique effect.
The present invention also provides a kind of pedicle screw component, and comprise pedicle nail and be connected to the extension tube that described pedicle nail follows closely tail, described extension tube is extension tube described above; Also comprise union joint, the nail tail of described pedicle nail has internal thread hole, and one end of described union joint is the first external thread section coordinated with described internal thread hole, and the other end of described union joint is crimped in the tube chamber of described extension tube one end.
Pedicle screw component includes above-mentioned flexible extension tube, and because above-mentioned extension tube has above-mentioned technique effect, the pedicle screw component with this extension tube also has identical technique effect.
Preferably, one end that described union joint is connected with described extension tube is the second external thread section, and described second external thread section is crimped on one end of described extension tube.
Preferably, described pedicle nail has axial through bore, and described union joint has axially extending bore; The tube chamber of described axial through bore, described axially extending bore, described extension tube, three is coaxially arranged, to inject bone cement.
Accompanying drawing explanation
Fig. 1 is the scheme of installation of reposition lever and pedicle nail;
Fig. 2 is the structural representation that the extension tube of pedicle nail nail tail is intersected;
Fig. 3 is the structural representation of a kind of detailed description of the invention of pedicle screw component provided by the present invention;
Fig. 4 is the structural representation that the extension tube of pedicle screw component in Fig. 3 is in elastic bending state;
Fig. 5 is after pedicle nail is implanted, the structural representation of extension tube chiasm interference;
Fig. 6 is structural representation non-interference after extension tube generation elastic deformation in Fig. 5;
Fig. 7 is the structural representation of a kind of detailed description of the invention of union joint provided by the present invention;
Fig. 8 is the structural representation of extension tube component;
Fig. 9 is extension tube, union joint, and the assembling schematic diagram of pedicle nail.
In Fig. 1-2:
21 reposition levers, 22 connectors, 221 through holes, 23 extension tubes, 24 vertebral bodys, 25 pedicle nails;
In Fig. 3-9:
11 extension tubes, 12 pedicle nails, 13 union joints, 131 first external thread sections, 132 second external thread sections, 121 nail tails
Detailed description of the invention
In order to make those skilled in the art understand technical scheme of the present invention better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to the structural representation that Fig. 3-6, Fig. 3 is a kind of detailed description of the invention of pedicle screw component provided by the present invention; Fig. 4 is the structural representation that the extension tube of pedicle screw component in Fig. 3 is in elastic bending state; Fig. 5 is after pedicle nail is implanted, the structural representation of extension tube chiasm interference; Fig. 6 is structural representation non-interference after extension tube generation elastic deformation in Fig. 5.
Pedicle screw component in this embodiment, comprises pedicle nail 12 and is connected to the extension tube 11 that pedicle nail 12 follows closely tail 121.As shown in Figure 3, the ailhead implant into body of pedicle nail 12, nail tail 121 is provided with extension tube 11.Can understand with reference to the description of background technology part, extension tube 11 can play guide effect for connecting device (such as reposition lever) and the connection of pedicle nail 12.Extension tube 11 in the present embodiment is flexible extension tube, and namely this extension tube 11 can elastic bending, thus can do suitable distortion under external force, as shown in Figure 4.
In operation process, after implanting pedicle nail 12, the pedicle nail 12 being positioned at spinal column (also can be other bone blocks) homonymy or heteropleural is arranged in wide-angle, and when causing extension tube 11 to occur chiasm interference, as shown in Figure 5, medical worker can impose external force, makes extension tube 11 be out of shape and reach non-interference state, as shown in Figure 6.After extension tube 11 is non-interference, connecting device can successfully be connected in extension tube 11 by medical worker, and then move along extension tube 11 afterbody realized with pedicle nail 12 and be connected, and pressure bar can be carried out when non-interference, strut, the action such as pressurization.Visible, flexible extension tube 11 reduces the difficulty of operation, reduces the risk of operation.For ease of understanding and succinct description, extension tube 11 being combined in pedicle screw component herein and describing, beneficial effect no longer repeats to discuss.
This pedicle screw component comprises and connects the union joint 13 that extension tube 11 and pedicle nail 12 follow closely tail 121.As shown in Figure 7, Fig. 7 is the structural representation of a kind of detailed description of the invention of union joint provided by the present invention; Fig. 8 is the structural representation of extension tube component; Fig. 9 is extension tube, union joint, and the assembling schematic diagram of pedicle nail.
The nail tail 121 of pedicle nail 12 has internal thread hole, and one end of union joint 13 is the first external thread section 131 coordinated with internal thread hole, and the other end of union joint 13 is crimped in the tube chamber of extension tube 11 one end, namely fixes with extension tube 11 interference fit.Operation consent, can be crimped on the other end of union joint 13 in one end of extension tube 11, namely be crimped in tube chamber, thus be fixed together with extension tube 11, forms extension tube component, as shown in Figure 8; Then, be connected with pedicle nail 12 by the union joint 13 being connected with extension tube 11, the nail tail 121 of pedicle nail 12 has internal thread hole, is tightened in internal thread hole by the first external thread section 131, thus achieves the assembling of pedicle screw component.
Because extension tube 11 is flexible, unitary design (integrally being processed by titanium alloy material) cannot be made as in background technology with pedicle nail 12; In addition, the nail tail 121 of pedicle nail 12 is when locking reposition lever class connecting device, locking member bolt need be tightened in and there is externally threaded nail tail 121, in order to not interfere the installation of bolt, when extension tube 11 is directly installed on nail tail 121, preferably be embedded in the inside of nail tail 121, in flexible extension tube 11, stud tail 121 fixedly has difficulties.Therefore design special union joint 13 install extension tube 11 to nail tail 121 on, union joint 13 can adopt metalwork to process, its one end is threaded with the nail tail 121 of pedicle nail 12, be easy to realize, and the other end of union joint 13 is crimped in extension tube 11, to realize interference fit, be also easy to realize.Therefore the union joint 13 of this structure, achieve the connection of flexible extension tube 11 and pedicle nail 12 easily, and the structure of union joint 13 is simple, is easy to processing.
Further, one end that union joint 13 is connected with extension tube 11 is the second external thread section 132, and namely the two ends of union joint 13 are external thread section.After one end that union joint 13 is connected with connection tube is processed as external thread section, time in the tube chamber being crimped extension tube 11 by frock, under pressure, the inwall of extension tube 11 end can produce distortion, and produce the lines matched with the second external thread section 132 screw thread, to strengthen crimping effect, ensure that extension tube 11 can not depart from union joint 13 in operation process.
For the various embodiments described above, union joint 13 can have axially extending bore, and namely union joint 13 is hollow structure.Correspondingly, pedicle nail 12 is also hollow nail, and namely pedicle nail 12 has axial through bore.The tube chamber of axial through bore, axially extending bore, extension tube 11, three can coaxially be arranged, (be generally the adhesive or bone filler that are made up of the two component of powder and liquor when needing to inject bone cement, for the filling of being adhesively fixed of artificial joint, Cranial defect, the fixing of fracture and medicine controlled release carrier etc.) time, bone cement directly can be injected in extension tube 11 by syringe by medical worker, and enters in vertebral body (or other bone blocks) along the axial through bore of the axially extending bore of union joint 13, pedicle nail 12.Visible, the pedicle nail 12 of this structure, union joint 13, extension tube 11 achieve the injection of bone cement simply.And, because extension tube 11 is flexible design, when using injector to inject and be subject to space constraint, only need the angle, the position that adjust extension tube 11, use within the scope of larger space to enable syringe.
In addition, the tube chamber of axial through bore, axially extending bore, extension tube 11, when three can coaxially be arranged, also facilitates pedicle nail 12 to insert desired position.When determining the position need inserting pedicle nail 12, first positioning needle can be inserted this position, then, the positioning needle part be positioned on skin sequentially can insert the tube chamber of the axial through bore of pedicle screw component, axially extending bore, extension tube 11, then pedicle screw component inserts body gradually along positioning needle, until the lower end rivet nut of pedicle nail 12 is inserted determine position.
Above to a kind of extension tube provided by the present invention, union joint, and extension tube component, pedicle screw component are all described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (1)
1. a pedicle screw component, comprise pedicle nail (12) and be connected to the extension tube (11) that described pedicle nail (12) follows closely tail, it is characterized in that, described extension tube (11) is can the flexible extension tube of elastic bending; Also comprise union joint (13), the nail tail of described pedicle nail (12) has internal thread hole, one end of described union joint (13) is the first external thread section (131) coordinated with described internal thread hole, and the other end of described union joint (13) is crimped in the tube chamber of described extension tube (11) one end; The upper one end be connected with described extension tube (11) of described union joint (13) is the second external thread section (132), and described second external thread section (132) is crimped on one end of described extension tube (11); Described pedicle nail (12) has axial through bore, and described union joint (13) has axially extending bore; The tube chamber of described axial through bore, described axially extending bore, described extension tube, three is coaxially arranged, to inject bone cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210465562.4A CN102908184B (en) | 2012-11-16 | 2012-11-16 | Pedicle screw assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210465562.4A CN102908184B (en) | 2012-11-16 | 2012-11-16 | Pedicle screw assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102908184A CN102908184A (en) | 2013-02-06 |
| CN102908184B true CN102908184B (en) | 2015-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210465562.4A Active CN102908184B (en) | 2012-11-16 | 2012-11-16 | Pedicle screw assembly |
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| Country | Link |
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| CN (1) | CN102908184B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016000229A1 (en) * | 2014-07-02 | 2016-01-07 | Yue Zhou | Extension piece at nail end of pedicle nail, dilator and push rod reset lever |
| RU2583245C2 (en) * | 2014-08-14 | 2016-05-10 | Сергей Владимирович Орлов | Device for percutaneous transpedicular stabilisation of spinal cord |
| CN113384335B (en) * | 2021-05-24 | 2023-03-31 | 上海三友医疗器械股份有限公司 | Eccentric screw and spinal correction fixing system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101296666A (en) * | 2005-08-25 | 2008-10-29 | 新特斯有限责任公司 | Spinal fixation system instrumentation and method of using same |
| CN201346237Y (en) * | 2009-01-14 | 2009-11-18 | 杨惠林 | Pourable screw for pedicle of vertebral arch |
| CN201930059U (en) * | 2011-01-13 | 2011-08-17 | 邱勇 | Vertebral pedicle screw |
| CN202892069U (en) * | 2012-11-16 | 2013-04-24 | 上海三友医疗器械有限公司 | Extension tube and connector and extension tube component and pedicle screw assembly |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6235028B1 (en) * | 2000-02-14 | 2001-05-22 | Sdgi Holdings, Inc. | Surgical guide rod |
| US7322979B2 (en) * | 2000-03-15 | 2008-01-29 | Warsaw Orthopedic, Inc. | Multidirectional pivoting bone screw and fixation system |
| US8821506B2 (en) * | 2006-05-11 | 2014-09-02 | Michael David Mitchell | Bone screw |
-
2012
- 2012-11-16 CN CN201210465562.4A patent/CN102908184B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101296666A (en) * | 2005-08-25 | 2008-10-29 | 新特斯有限责任公司 | Spinal fixation system instrumentation and method of using same |
| CN201346237Y (en) * | 2009-01-14 | 2009-11-18 | 杨惠林 | Pourable screw for pedicle of vertebral arch |
| CN201930059U (en) * | 2011-01-13 | 2011-08-17 | 邱勇 | Vertebral pedicle screw |
| CN202892069U (en) * | 2012-11-16 | 2013-04-24 | 上海三友医疗器械有限公司 | Extension tube and connector and extension tube component and pedicle screw assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102908184A (en) | 2013-02-06 |
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Address after: 201807 Jiading District Jia Tang Road, Shanghai, No. 1988 Patentee after: Shanghai Sanyou medical equipment Limited by Share Ltd Address before: 201807 Jiading District Jia Tang Road, Shanghai, No. 1988 Patentee before: Shanghai Sanyou Medical Devices Co., Ltd. |