CN204410947U - A kind of can the vertebra dynamic pedicle screw system of fine motion - Google Patents
A kind of can the vertebra dynamic pedicle screw system of fine motion Download PDFInfo
- Publication number
- CN204410947U CN204410947U CN201520023689.XU CN201520023689U CN204410947U CN 204410947 U CN204410947 U CN 204410947U CN 201520023689 U CN201520023689 U CN 201520023689U CN 204410947 U CN204410947 U CN 204410947U
- Authority
- CN
- China
- Prior art keywords
- hinge
- pedicle screw
- nail seat
- pitman
- screw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Surgical Instruments (AREA)
Abstract
The utility model discloses a kind of can the vertebra dynamic pedicle screw system of fine motion, comprise pitman and several pedicle screws, described pedicle screw comprises lock nut, nail seat, limited block, the first hinge, the second hinge and screw body.The pedicle screw tail end of native system can carry out fine motion on two planar, realizes dynamically fixing, and pitman pre-bending is convenient, and pedicle screw bears little, the two screw of moment or the accessible application of many screws.
Description
Technical field
The present invention relates to a kind of medical surgery apparatus, be specifically related to a kind of spinal column internal fixation device, this holder is applicable to the Minimally Invasive Surgery of internal fixation of spine.
Background technology
The spinal internal fixation system applied clinically is generally made up of two parts, the pedicle screw namely playing anchorage effect and the connecting elements such as rod iron, steel plate playing bridge joint effect.The operation principle of spinal internal fixation system is: insert pedicle screw respectively the upper vertebral body of targeted vertebral body and the next vertebral body, be fixed by connecting elements between pedicle screw, make upper and lower vertebral body become as a whole, thus substitute by connector the motive power that original diseased region bears spinal column.The spinal internal fixation system of current classics is connecting elements is nail rod or steel plate, forms strong fixing, has higher stiffness, can not relative motion between the upper vertebral body be fixed and the next vertebral body.This fixing problem brought is: because described hold-down bars or fixing head are rigidity, the interpyramidal stress in upper bottom supports primarily of this rod or plate, bears, the stress that sclerotin newborn in two interpyramidal spaces bears is less, easily cause osteoporosis, fracture delayed union is not even healed.When after removal inner fixing device, can again subside after vertebral body load.Strong fixing meeting causes neighbouring section stress to increase in addition, disc degradation etc. between acceleration neighbouring section.
In order to solve fixing rod iron and the above-mentioned technological deficiency of pedicle screw, make, between the upper vertebral body of fixing and the next vertebral body, there is certain mobility, Authorization Notice No. is a kind of lumbar vertebral posterior dynamic fixation device disclosed in CN 202458646 U, adopt helical spring pitman to replace generic connectivity rod, helical spring pitman has certain deformation performance; In addition, publication number is dynamic fixing system for lumbar vertebrae disclosed in CN 102362816 A, and adopt the dynamic rod having helical pitch screw thread to replace generic connectivity rod, the dynamic rod having helical pitch screw thread has certain deformation performance.But, helical spring pitman and the dynamic rod having helical pitch screw thread, doctor is in operation process, and both discoveries all have following three technological deficiencies:
1, according to the Distance geometry radian at the spinal column position of pathological changes, pitman in most cases all needs to carry out low-angle pre-bending, the central angle of the pitman after pre-bending is generally at 0-10 °, helical spring pitman and the dynamic rod having helical pitch screw thread, when pre-bending due to its elastic-restoring force, still revert back to straight rod.
2, pedicle screw system is after implant into body, human body is in active procedure, and helical spring pitman needs to bear motive power, from moment formula M=FL with the dynamic rod having helical pitch screw thread, when directed force F is certain, distance L is larger, and moment M is larger, and the distance of namely pitman generation stress deformation is too large, the moment of bearing is too large, pitman easily fractures, once fracture, then causes secondary injury.
3, before implantation pedicle screw, need according to the physiologic radian of patient's vertebra or the radian that reaches in advance pressurizeing between vertebral body or strutting, this just causes the discordance of intervertebral distance, that is the distance between the pedicle screw implanted is not equidistant, and the distance between the pedicle screw of implantation cannot be determined before the surgery.When the multiple spinal injury of patient, need to implant multiple pedicle screw, then adopt pitman that multiple pedicle screw is linked to be an entirety, and the helical spring of helical spring pitman may stop the position of pedicle screw, same, the helical pitch threaded portion having the dynamic rod of helical pitch screw thread also may stop and causes pedicle screw system to use in the position of pedicle screw.
Summary of the invention
The deficiency that this utility model exists to overcome above prior art, provide a kind of can the vertebra dynamic pedicle screw system of fine motion, the pedicle screw tail end of native system can carry out fine motion on two planar, realize dynamically fixing, and pitman pre-bending is convenient, pedicle screw bears little, the two screw of moment or the accessible application of many screws.
The purpose of this utility model is realized by following technical scheme: originally can the vertebra dynamic pedicle screw system of fine motion, comprise pitman and several pedicle screws, described pedicle screw comprises lock nut, nail seat, limited block, the first hinge, the second hinge and screw body, wherein
Described nail seat top is provided with female thread and has 2 the first U-shaped openings, first U-shaped opening forms the space holding pitman, have 2 the second U-shaped openings bottom nail seat and have for the through hole through the first hinge, the first U-shaped opening and the second U-shaped opening are separated by 90 °;
Described limited block is a square, and limited block side has two mutually perpendicular through holes;
The diameter of described second hinge is greater than the diameter of the first hinge, and the second hinge has the through hole passed for the first hinge;
Described screw body top has 2 the 3rd U-shaped openings and has for the through hole through the second hinge;
Described second U-shaped opening and the 3rd U-shaped opening insert mutually, second hinge is successively through the other end at the one end at screw body top, limited block, screw body top, first hinge is successively through the other end bottom the one end bottom nail seat, limited block, the second hinge, nail seat, pitman is placed in the first U-shaped opening at the nail seat top of several pedicle screws, and lock nut is screwed into the female thread at nail seat top.
Described first hinge and the second hinge be bolt and with bolted nut.
Or described first hinge and the second hinge are rivet.
This utility model has following advantage relative to prior art:
1, the pitman of native system, without the need to design flexibility structure, easily according to the Distance geometry radian at the spinal column position of pathological changes, can carry out the low-angle pre-bending of central angle 0-10 °.
2, the pedicle screw of native system, nail seat, relative to screw body, can be rotated around the first hinge, or rotate around the second hinge, therefore, pedicle screw system is after implant into body, and the active force to screw system that human body produces in active procedure, just can be born by the rotational deformation of nail seat, compared to the distortion of pitman, distance L shortens, and moment M is directly proportional and diminishes, and pedicle screw is frangibility not.
3, the pitman of native system is level and smooth pole, there is no the concaveconvex structures such as elastic construction, in operation process, no matter the vertebra of pathological changes needs to implant how many pedicle screws, distance no matter between pedicle screw is either large or small, pitman can put into the U-shaped opening at nail seat top smoothly, and is locked by lock nut, and pitman is linked to be a firm entirety several pedicle screws.
Accompanying drawing explanation
Fig. 1-Fig. 5 be detailed description of the invention can the structure chart of vertebra dynamic pedicle screw system of fine motion.Wherein, Fig. 1 is assembly drawing, and Fig. 2 is the exploded view of pedicle screw, and Fig. 3 is the structure chart of nail seat, and Fig. 4 is the structure chart of limited block, and Fig. 5 is the structure chart of screw body.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As Figure 1-Figure 5 can the vertebra dynamic pedicle screw system of fine motion, comprise pitman 1 and 2 pedicle screws, pedicle screw comprises lock nut 4, nail seat 3, limited block 2, first hinge 5, second hinge 6 and screw body 7, wherein,
Nail seat 3 top is provided with female thread 11 and has 2 the first U-shaped openings 8, first U-shaped opening 8 forms the space holding pitman 1, have 2 the second U-shaped openings 9 bottom nail seat 3 and have for the through hole through the first hinge 5, the first U-shaped opening 8 and the second U-shaped opening 9 are separated by 90 °;
Limited block 2 is a square, and limited block 2 side has two mutually perpendicular through holes, and wherein, the diameter of the first through hole 2-1 is greater than the second through hole 2-2;
The diameter of the second hinge 6 is greater than the diameter of the first hinge 5, and the second hinge 6 has the through hole passed for the first hinge 5, in the present embodiment, the first hinge 5 and the second hinge 6 be bolt and with bolted nut.
Screw body 7 top has 2 the 3rd U-shaped openings 10 and has for the through hole through the second hinge 6;
Second U-shaped opening 9 and the 3rd U-shaped opening 10 insert mutually, second hinge 6 is successively through the other end at the one end at screw body 7 top, limited block 2, screw body 7 top, first hinge 5 is successively through the other end bottom the one end bottom nail seat 3, limited block 2, second hinge 6, nail seat 3, pitman 1 is placed in the first U-shaped opening 8 at nail seat 3 top of 2 pedicle screws, and lock nut 4 is screwed into the female thread 11 at nail seat 3 top.
The assembling of this pedicle screw system and use procedure are:
1, using as the bolt of the second hinge through screw body 7 top and limited block, be screwed into nut, using as the first hinge bolt through bottom nail seat, the through hole of limited block and the second hinge, be screwed into nut.
2, each pedicle screw assembled is inserted each vertebral body, the first U-shaped opening at each pedicle screw top will remain in same straight line, according to patient's vertebra radian, pre-bending is carried out to pitman, then pitman is put into each the first U-shaped opening, be screwed into lock nut 4, (in Fig. 1, pedicle screw is 2 as shown in Figure 1, when pedicle screw is multiple, assembling process is identical with use procedure), this pedicle screw system permission patient fixedly hinders vertebra and carries out the fine motion activities such as certain anterior flexion and rear stretching lateral bending rotation.
Claims (3)
1. can the vertebra dynamic pedicle screw system of fine motion, comprise pitman and several pedicle screws, it is characterized in that: described pedicle screw comprises lock nut, nail seat, limited block, the first hinge, the second hinge and screw body, wherein,
Described nail seat top is provided with female thread and has 2 the first U-shaped openings, first U-shaped opening forms the space holding pitman, have 2 the second U-shaped openings bottom nail seat and have for the through hole through the first hinge, the first U-shaped opening and the second U-shaped opening are separated by 90 °;
Described limited block is a square, and limited block side has two mutually perpendicular through holes;
The diameter of described second hinge is greater than the diameter of the first hinge, and the second hinge has the through hole passed for the first hinge;
Described screw body top has 2 the 3rd U-shaped openings and has for the through hole through the second hinge;
Described second U-shaped opening and the 3rd U-shaped opening insert mutually, second hinge is successively through the other end at the one end at screw body top, limited block, screw body top, first hinge is successively through the other end bottom the one end bottom nail seat, limited block, the second hinge, nail seat, pitman is placed in the first U-shaped opening at the nail seat top of several pedicle screws, and lock nut is screwed into the female thread at nail seat top.
2. according to claim 1 a kind of can the vertebra dynamic pedicle screw system of fine motion, it is characterized in that: described first hinge and the second hinge be bolt and with bolted nut.
3. according to claim 1 a kind of can the vertebra dynamic pedicle screw system of fine motion, it is characterized in that: described first hinge and the second hinge are rivet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520023689.XU CN204410947U (en) | 2015-01-14 | 2015-01-14 | A kind of can the vertebra dynamic pedicle screw system of fine motion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520023689.XU CN204410947U (en) | 2015-01-14 | 2015-01-14 | A kind of can the vertebra dynamic pedicle screw system of fine motion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204410947U true CN204410947U (en) | 2015-06-24 |
Family
ID=53461368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520023689.XU Active CN204410947U (en) | 2015-01-14 | 2015-01-14 | A kind of can the vertebra dynamic pedicle screw system of fine motion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204410947U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109528280A (en) * | 2018-12-19 | 2019-03-29 | 中国人民解放军第二军医大学第二附属医院 | A kind of non-displacement device and anti-displacement system for interior fixation |
| CN110251222A (en) * | 2019-06-04 | 2019-09-20 | 迪恩医疗科技有限公司 | The horizontal even device of pedicle nail nail seat |
| CN112790847A (en) * | 2020-09-23 | 2021-05-14 | 罗绍金 | Selective pedicle screw and method of use |
-
2015
- 2015-01-14 CN CN201520023689.XU patent/CN204410947U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109528280A (en) * | 2018-12-19 | 2019-03-29 | 中国人民解放军第二军医大学第二附属医院 | A kind of non-displacement device and anti-displacement system for interior fixation |
| CN109528280B (en) * | 2018-12-19 | 2023-12-29 | 中国人民解放军第二军医大学第二附属医院 | Anti-displacement device and anti-displacement system for internal fixation |
| CN110251222A (en) * | 2019-06-04 | 2019-09-20 | 迪恩医疗科技有限公司 | The horizontal even device of pedicle nail nail seat |
| CN110251222B (en) * | 2019-06-04 | 2023-12-19 | 迪恩医疗科技有限公司 | Pedicle screw seat transverse connection device |
| CN112790847A (en) * | 2020-09-23 | 2021-05-14 | 罗绍金 | Selective pedicle screw and method of use |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2323573B1 (en) | Anterior transpedicular screw-and-plate system | |
| US8652174B2 (en) | Expandable interspinous process spacer | |
| US9763805B2 (en) | Spacer with temporary fixation plate | |
| US20130060283A1 (en) | Laminoplasty Plates, Systems, And Devices, And Methods Relating to the Same | |
| JP2016512098A (en) | Cross brace bilateral spinal rod connector | |
| JP2016155023A (en) | Spine implant device | |
| CN201977917U (en) | Non-fusion elastic rod internal fixing system | |
| US10695189B2 (en) | Interspinous omnidirectional dynamic stabilization device | |
| CN104013457A (en) | Universal stabilizer used between spinous processes | |
| US20210085369A1 (en) | Posterior lumbar plate | |
| CN105193524A (en) | Stabilizer used between spine plates | |
| CN204410947U (en) | A kind of can the vertebra dynamic pedicle screw system of fine motion | |
| US20220395301A1 (en) | Laminoplasty plates, systems, and devices, and methods relating to the same | |
| CN204410946U (en) | A kind of elastic vertebra dynamic pedicle screw system | |
| CN102512232A (en) | Interspinal universal dynamic stabilizer | |
| CN105919699A (en) | Spinous process and vertebral plate stabilizer | |
| CN104799928A (en) | Spine board dynamic stabilizing system | |
| CN104323846A (en) | Universal elastic fixed rod | |
| CN203815664U (en) | Inelastic and elastic combined intervertebral support device | |
| CN106983549B (en) | Dynamic fixer between ratchet plates | |
| CN204246232U (en) | A kind of universal flexible fastening rod | |
| CN211381999U (en) | Intervertebral fusion cage | |
| CN203898415U (en) | Interspinous universal stabilizer | |
| CN208274609U (en) | A kind of variable diameter spinous process fusion Interal fixation system | |
| CN110893130A (en) | Intervertebral fusion cage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |