CN209611269U - A kind of enhanced pedicle screw - Google Patents
A kind of enhanced pedicle screw Download PDFInfo
- Publication number
- CN209611269U CN209611269U CN201821042639.6U CN201821042639U CN209611269U CN 209611269 U CN209611269 U CN 209611269U CN 201821042639 U CN201821042639 U CN 201821042639U CN 209611269 U CN209611269 U CN 209611269U
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- nail
- elastic tubular
- tubular part
- enhanced
- pedicle screw
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- 241001079814 Symphyotrichum pilosum Species 0.000 claims abstract description 40
- 235000004224 Typha angustifolia Nutrition 0.000 claims abstract description 40
- 230000008961 swelling Effects 0.000 claims abstract description 5
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 7
- 239000013013 elastic material Substances 0.000 claims description 3
- 210000000988 bone and bone Anatomy 0.000 abstract description 24
- 230000001054 cortical effect Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 208000001132 Osteoporosis Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses a kind of enhanced pedicle screws, including nail seat, nail rod and expandable component, the nail seat is set to the top of the nail rod, the nail seat and the nail rod are respectively equipped with centre bore, the expandable component includes elastic tubular part and pull parts, the elastic tubular part is set to the end of the nail rod, the pull parts are located in the centre bore of the nail rod, described pull parts one end is connect with the elastic tubular part, when the elastic tubular part is in swelling state, the pull parts other end is fixed in the nail seat.Using the enhanced pedicle screw of the utility model, have and be easily screwed into, can stablize fixed advantage in cortical bone site and cancellous bone site.
Description
Technical field
The utility model relates to a kind of pedicle screw more particularly to a kind of enhanced pedicle screws.
Background technique
Pedicle of vertebral arch is a part of vertebral arch, arises from centrum upper back, short and thick, rearward protrusion vertical with centrum direction,
Its shape is arc-shaped, is fused together with centrum, articular process and vertebral plate, and pedicle of vertebral arch is the component part for forming intervertebral foramen.Vertebral arch
Root is also to connect bony structure most strong between centrum and vertebral plate, and carrying out screw fixation by pedicle of vertebral arch can be steady to rebuild backbone
Reliable mechanical foundation is provided surely.
There are two types of common pedicle screw is general, a kind of all single threads of its screw thread, another its screw thread whole
For double thread.It is internal then be cancellous bone since the outside of pedicle of vertebral arch is cortex bone, and cortex bone is more hard, and spongiosa
Bone is then more soft.If it exists if osteoporosis, cancellous bone is then more soft.According to the pedicle screw of single thread
Pedicle screw internal fixation operation is carried out, since the screw pitch of single thread is larger, thread is higher relatively thin, therefore when screwing in, energy
Enough preferable grasping cancellous bones, but it is bad with the fixed effect of external hard cortex bone, and it is easy to happen fracture；If adopting
Carry out pedicle screw internal fixation operation with the pedicle screw of double thread, since the screw pitch of double thread is smaller, and thread compared with
It is low thicker, therefore when screwing in, although inside can not can be grasped well preferably with external cortex bone fixation
Cancellous bone, cause nail to be easy to loosen, stability is bad.
Application No. is the Chinese patents of CN201420120615.3 to disclose a kind of pedicle nail of compound thread, including nail
Sub- ontology and the screw thread on ontology, Design of Screw Thread are fifty-fifty two sections of length, and front half section is single thread, and the second half section is double
Line screw thread, and the screw pitch of single thread is greater than the screw pitch of double thread.The pedicle nail has taken into account two kinds of screw thread features, i.e., after
The screw pitch of section double thread is small, and closeer lower tooth can enhance the intensity of double thread, be not only able to fine with outer cortical bone
Fixation, but also be not easily broken；And the screw pitch of leading portion single thread is big, relatively thin higher tooth can be maximum after screwing in cancellous bone
The increase of limit grasps bone amount, stablizes nail, so that the entirety of pedicle nail can preferably fix in bone.
But it since nose threads screw pitch is big, has the characteristics that relatively thin tooth, can be difficult to be screwed into cortical bone site, if by force
Power is screwed into, and be may result in nose threads and is destroyed, to influence pedicle screw in the fixation of cancellous bone site.
Summary of the invention
In order to solve the above-mentioned technical problem, the purpose of this utility model is to provide a kind of enhanced pedicle screw,
It is easy to be screwed into, while can stablizes fixation in cortical bone site and cancellous bone site.
The utility model is achieved through the following technical solutions: a kind of enhanced pedicle screw, including nail seat, nail rod and
Expandable component.
Wherein, the nail seat is set to the top of the nail rod, and the nail seat and the nail rod are equipped with centre bore, it is described can be swollen
Swollen component includes elastic tubular part and pull parts, and the elastic tubular part is set to the end of the nail rod, the pulling
Component is located in the centre bore of the nail rod, and described pull parts one end is connect with the elastic tubular part, the elastic tube
When shape component is in swelling state, the pull parts other end is fixed in the nail seat.
Further, described elastic tubular part one end is fixedly connected with the end of the nail rod, and the other end is free end,
Described pull parts one end is connect with the free end of the elastic tubular part.
Further, the pull parts other end is equipped with fixed part, and the nail seat is equipped with matched with the fixed part
Fixed groove.
Further, the elastic tubular part welds or is screwed onto the end of the nail rod.
Further, described pull parts one end and the free end of the elastic tubular part are hinged.
Further, the elastic tubular part is made of titanium alloy or other biocompatible elastic materials.
Further, the nail rod is equipped with external screw thread.
It further, further include jackscrew, the nail seat is equipped with U-shaped groove, and the jackscrew is set in the U-shaped groove.
A kind of enhanced pedicle screw of the utility model, have the following beneficial effects: by be arranged expandable component,
It realizes minor diameter to lock, changes diameter after locking, to enhance resisting pull out forces, ensure that pedicle screw in spongiosa osseous part
Stablizing for position is fixed；Nail rod position is equipped with tiny external screw thread, while ensure that pedicle screw in the stabilization of cortical bone site
It is fixed.
Detailed description of the invention
It, below will be to institute in embodiment or description of the prior art in order to illustrate more clearly of the technical solution of the utility model
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some of the utility model
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram of enhanced pedicle screw of the utility model embodiment one；
Fig. 2 is a kind of swelling state structural schematic diagram of enhanced pedicle screw of the utility model embodiment one；
Fig. 3 is a kind of structural schematic diagram of enhanced pedicle screw of the utility model embodiment two；
Fig. 4 is a kind of swelling state structural schematic diagram of enhanced pedicle screw of the utility model embodiment two.
Wherein, attached drawing correspondence markings in figure are as follows:
1- nail seat 2- jackscrew 3- nail rod
4- elastic tubular part
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, to the technical solution in inventive embodiments carry out it is clear,
It is fully described by, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole implementation
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, fall within the protection scope of the utility model.
Embodiment one
It is a kind of enhanced pedicle screw of the utility model, including nail seat 1, jackscrew 2, nail referring to Figure of description 1
Bar 3 and expandable component, the nail seat 1 be set to the nail rod 3 top, the jackscrew 2 be set to the nail seat 1 in, it is described can
Expansion assembly is set to the end of the nail rod 3.
Wherein, the nail seat 1 is equipped with U-shaped groove, and the bottom end of the U-shaped groove is equipped with the first centre bore, in described first
The periphery in heart hole is equipped with a circle fixed groove, and the upper end inner wall of the U-shaped groove is equipped with internal screw thread, and the jackscrew 2 is equipped with and institute
The external screw thread of screw-internal thread fit is stated, the jackscrew 2 is additionally provided with hexagonal centre bore, can be by institute by the hexagonal centre bore
It states jackscrew 2 and is screwed onto the U-shaped groove upper end inner wall.
The second centre bore, the first centre bore pair of second centre bore and the nail seat 1 are equipped with inside the nail rod 3
Together, the external screw thread of certain specification is equipped with outside the nail rod 3, the external screw thread is for the pedicle screw to be stably fixed at
Cortical bone site.
The expandable component includes elastic tubular part 4 and pull parts, the outer diameter of the elastic tubular part 4 and institute
The outer diameter for stating nail rod 3 is consistent, and the elastic tubular part 4 is that the material (such as titanium alloy silk thread) with biocompatibility is woven into
Tubular structure, one end of the elastic tubular part 4 is fixedly connected on the end of the nail rod 3 by conventional fixing means,
For example, welding or being spirally connected, the other end of the elastic tubular part 4 is free end, and the connector of the titanium alloy silk thread is located at institute
State free end；The pull parts are set to inside the nail rod 3 and the elastic tubular part 4, one end of the pull parts
It is fixedly connected with the titanium alloy wire wire terminal for being located at 4 free end of elastic tubular part, the other end of the pull parts is set
There are fixed part, such as grab, protruded into inside the nail rod 3 by professional tool, pull the fixed part of the pull parts, pulls
Component drives the titanium alloy wire wire terminal of 4 free end of elastic tubular part to 3 direction pull of nail rod, referring to Figure of description 2, institute
It states elastic tubular part 4 and forms a ball of string, the fixed part of the pull parts is then fixed on to the anchor of the nail seat 1
In slot, since the diameter of the ball of string is greater than the diameter of the elastic tubular part 4, pedicle screw more stable can be consolidated
It is scheduled on cancellous bone site.
Embodiment two
Be the enhanced pedicle screw of another kind of the utility model referring to Figure of description 3, including nail seat 1, jackscrew 2,
Nail rod 3 and expandable component, the nail seat 1 are set to the top of the nail rod 3, and the jackscrew 2 is set in the nail seat 1, described
Expandable component is set to the end of the nail rod 3.
Wherein, the nail seat 1 is equipped with U-shaped groove, and the bottom end of the U-shaped groove is equipped with the first centre bore, in described first
The periphery in heart hole is equipped with a circle fixed groove, and the upper end inner wall of the U-shaped groove is equipped with internal screw thread, and the jackscrew 2 is equipped with and institute
The external screw thread of screw-internal thread fit is stated, the jackscrew 2 is additionally provided with hexagonal centre bore, can be by institute by the hexagonal centre bore
It states jackscrew 2 and is screwed onto the U-shaped groove upper end inner wall.
The second centre bore, the first centre bore pair of second centre bore and the nail seat 1 are equipped with inside the nail rod 3
Together, the external screw thread of certain specification is equipped with outside the nail rod 3, the external screw thread is for the pedicle screw to be stably fixed at
Cortical bone site.
The expandable component includes elastic tubular part 4 and pull parts, the outer diameter of the elastic tubular part 4 and institute
The outer diameter for stating nail rod 3 is consistent, and the elastic tubular part 4 is the closed tubular structure in one end open at one end, the elastic tubular
The open end of component 4 is fixedly connected on the end of the nail rod 3 by conventional fixing means, for example, weld or be spirally connected, it is described close
The one end closed is free end；The pull parts are set to inside the nail rod 3 and the elastic tubular part 4, the pulling department
One end of part is flexibly connected by conventional methods with the free end of the elastic tubular part 4, such as hingedly, the pull parts
The other end be equipped with fixed part, such as grab, the fixed part can be connected in the fixed groove of the nail seat 1, for making bullet
Property tubular part 4 bear certain axial tension, referring to Figure of description 4, due to the elastic tubular part 4 by titanium alloy or
Other biocompatible elastic materials are made, therefore the middle part of the elastic tubular part 4 can generate and be radially expanded, thus more steady
Fixed is fixed on cancellous bone site.
The preferred embodiment of the utility model has shown and described in above description, as previously described, it should be understood that this is practical new
Type is not limited to forms disclosed herein, and should not be regarded as an exclusion of other examples, and can be used for various other groups
Conjunction, modification and environment, and above-mentioned introduction or the technology of related fields can be passed through within the scope of the inventive concept described herein
Or knowledge is modified.And changes and modifications made by those skilled in the art do not depart from the spirit and scope of the utility model, then
It all should be in the protection scope of the appended claims for the utility model.
Claims (8)
1. a kind of enhanced pedicle screw, including nail seat (1), nail rod (3) and expandable component, the nail seat (1) is set to institute
The top of nail rod (3) is stated, the nail seat (1) and the nail rod (3) are respectively equipped with centre bore, which is characterized in that described inflatable
Component includes elastic tubular part (4) and pull parts, and the elastic tubular part (4) is set to the end of the nail rod (3), institute
It states pull parts to be located in the centre bore of the nail rod (3), described pull parts one end and the elastic tubular part (4) are even
It connects, when the elastic tubular part (4) is in swelling state, the pull parts other end is fixed on the nail seat (1).
2. a kind of enhanced pedicle screw according to claim 1, which is characterized in that the elastic tubular part (4)
One end is fixedly connected with the end of the nail rod (3), and the other end is free end, described pull parts one end and the elastic tubular
The free end of component (4) is flexibly connected.
3. a kind of enhanced pedicle screw according to claim 1, which is characterized in that the pull parts other end is set
There is fixed part, the nail seat (1) is equipped with and the matched fixed groove of the fixed part.
4. a kind of enhanced pedicle screw according to claim 2, which is characterized in that the elastic tubular part (4)
Weld or be screwed onto the end of the nail rod (3).
5. a kind of enhanced pedicle screw according to claim 2, which is characterized in that described pull parts one end and institute
The free end for stating elastic tubular part (4) is hinged.
6. a kind of enhanced pedicle screw according to claim 1, which is characterized in that the elastic tubular part (4)
It is made of titanium alloy or biocompatible elastic material.
7. a kind of enhanced pedicle screw according to claim 1, which is characterized in that the nail rod (3) is equipped with outer spiral shell
Line.
8. a kind of enhanced pedicle screw according to claim 1, which is characterized in that further include jackscrew (2), the nail
Seat (1) is equipped with U-shaped groove, and the jackscrew is set in the U-shaped groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821042639.6U CN209611269U (en) | 2018-07-03 | 2018-07-03 | A kind of enhanced pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821042639.6U CN209611269U (en) | 2018-07-03 | 2018-07-03 | A kind of enhanced pedicle screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209611269U true CN209611269U (en) | 2019-11-12 |
Family
ID=68441396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821042639.6U Active CN209611269U (en) | 2018-07-03 | 2018-07-03 | A kind of enhanced pedicle screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209611269U (en) |
-
2018
- 2018-07-03 CN CN201821042639.6U patent/CN209611269U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240425 Address after: 200135 Room 202, building 4, No. 590, Ruiqing Road, east zone of Zhangjiang High tech industry, Pudong New Area, Shanghai Patentee after: Shanghai Dabo Medical Technology Co.,Ltd. Country or region after: China Address before: No. 18 Shanbian Hongdong Road, Haicang District, Xiamen City, Fujian Province, 361000 Patentee before: DOUBLE MEDICAL TECHNOLOGY Inc. Country or region before: China |