CN111374743A - Extension rod for internal fixation of spine - Google Patents
Extension rod for internal fixation of spine Download PDFInfo
- Publication number
- CN111374743A CN111374743A CN202010097608.6A CN202010097608A CN111374743A CN 111374743 A CN111374743 A CN 111374743A CN 202010097608 A CN202010097608 A CN 202010097608A CN 111374743 A CN111374743 A CN 111374743A
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- Prior art keywords
- connecting rod
- locking screw
- screw hole
- hexagonal prism
- rod
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7002—Longitudinal elements, e.g. rods
- A61B17/7004—Longitudinal elements, e.g. rods with a cross-section which varies along its length
- A61B17/7005—Parts of the longitudinal elements, e.g. their ends, being specially adapted to fit in the screw or hook heads
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Neurology (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
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- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
- Prostheses (AREA)
Abstract
The invention relates to a spinal internal fixation extension rod, which is characterized in that: the two ends of the first connecting rod are respectively provided with a first connecting rod hexagonal prism which is provided with a first connecting rod locking screw hole, the connecting end of the second connecting rod is provided with a second connecting rod hexagonal prismatic groove, the connecting end is provided with a second connecting rod connecting end locking screw hole which is communicated with the connecting end, the tail end of the second connecting rod is provided with a second connecting rod hexagonal prism which is provided with a second connecting rod tail end locking screw hole, the first connecting rod hexagonal prism is inserted into the second connecting rod hexagonal prismatic groove, a locking screw is inserted into the second connecting rod connecting end locking screw hole to be detachably and fixedly connected, so that the first connecting rod and the second connecting rod can be detachably and fixedly connected, the invention has simple structure, can be directly extended on the basis of the original connecting rod, is easy to carry out secondary operation and does not need excessive exposed wounds, reduces the operation trauma.
Description
Technical Field
The invention relates to a spinal internal fixation extension rod.
Background
The spinal internal fixation pedicle screw rod system is commonly used for treating various spinal degenerative and unstable diseases, after internal fixation is completed, due to the change of biomechanics, adjacent sections of the fixed sections of the spinal internal fixation pedicle screw rod system are often degenerated (particularly when a long section is fixed), in this case, secondary operation is often needed on the adjacent sections, the adjacent sections are fixed again, in order to reduce the trauma of the secondary operation, the original connecting rod is usually selected to be further lengthened, and at the moment, a domino joint is needed to be used for completing the process.
The domino joint used in the prior art is a parallel hollow block-shaped or tubular structure, is respectively connected with a connecting rod in the primary operation and a connecting rod added in the secondary operation, and is provided with a plurality of rotating structures for adjusting the angle between the two rods and finally locking all the structures into a whole.
The following defects exist in practical use: 1. the parallel structure occupies a large space, and the space left for operation is small, so that the operation difficulty is increased; 2. the locking structure has more locking structures, the operation is complex, the simultaneous locking of all the structures is difficult to ensure on the premise of not changing the relative positions of the two rods, and the complexity of the manufacturing process is increased; 3. original connective bar needs to leave sufficient length at the tail end to guarantee can with connect firm connection, but under a lot of circumstances, can not foresee the longer tail end of reservation when the first operation, just need expose original incision this moment, wholly take out original connective bar, then change longer connective bar again, increased the wound of operation.
Disclosure of Invention
The invention provides a spinal internal fixation extension rod which is simple in structure, can be directly extended on the basis of the original connecting rod, is easy to perform secondary operation, does not need excessive exposed wounds, and reduces operation wounds.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a fixed extension rod in backbone which characterized in that: the first connecting rod is cylindrical, two ends of the first connecting rod are respectively provided with a first connecting rod hexagonal prism, and a first connecting rod locking screw hole is formed in the first connecting rod hexagonal prism;
the second connecting rod is cylindrical, a connecting end of the second connecting rod is provided with a second connecting rod hexagonal prism-shaped groove, the connecting end is provided with a second connecting rod connecting end locking screw hole, the second connecting rod connecting end locking screw hole penetrates through the connecting end, and the tail end of the second connecting rod is provided with a second connecting rod hexagonal prism which is provided with a second connecting rod tail end locking screw hole;
the first connecting rod hexagonal prism is inserted into the second connecting rod hexagonal prism groove, the locking screw is inserted into the second connecting rod connecting end locking screw hole, penetrates through the first connecting rod locking screw hole, penetrates through the connecting end, and is used for the first connecting rod and the second connecting rod to be detachably and fixedly connected.
The extension rod for internal fixation of spine, wherein: and threads are arranged in the first connecting rod locking screw hole, the second connecting rod connecting end locking screw hole and the second connecting rod tail end locking screw hole, so that the locking screw can be inserted into the locking screw hole to be detached and fixed.
The extension rod for internal fixation of spine, wherein: the connecting end of the second connecting rod is increased in diameter, so that the connecting end is increased in fixing strength.
The extension rod for internal fixation of spine, wherein: the first connecting rod and the second connecting rod are made of titanium alloy.
The extension rod for internal fixation of spine, wherein: the first connecting rod hexagonal prism is consistent with the second connecting rod hexagonal prism, and the first connecting rod locking screw hole is consistent with the second connecting rod tail end locking screw hole.
The invention has the beneficial effects that: the invention has simple structure, reduces the production cost, does not need extra space, directly prolongs the length of the original connecting rod on the basis of the original connecting rod, does not need to reserve a longer tail end length, is easy to perform secondary operation, does not need excessive exposed wounds and reduces the operation wound.
Drawings
Fig. 1 is a view showing a second connecting rod for fixing an extension rod in a vertebral column.
Fig. 2 is a view showing the second connecting rod for fixing the extension rod in the vertebral column after increasing its diameter.
Fig. 3 is a view showing the construction of a first connecting rod for fixing an extension rod in the spine.
Fig. 4 is a view showing the structure of a locking screw for fixing an extension rod in the spinal column.
Fig. 5 is a structure view of the extension rod for fixing in the spine after connection.
Fig. 6 is a cross-sectional structural view after the connection of the extension rod for internal fixation of the vertebral column.
Description of reference numerals: 1-a first connecting rod; 2-a second connecting rod; 3-a first connecting rod hexagonal prism; 4-a hexagonal prism-shaped groove of the second connecting rod; 5-locking screw holes of the first connecting rod; 6-locking screw holes at the connecting ends of the second connecting rods; 7-a second connecting rod hexagonal prism; 8-locking screw holes at the tail ends of the second connecting rods; 9-locking screws; 10-a connecting end.
Detailed Description
As shown in fig. 1 to fig. 6, an extension rod for internal fixation of spine is characterized in that: first connecting rod 1 is cylindrical, and its both ends set up first connecting rod hexagonal prism 3 respectively, set up first connecting rod locking screw 5 on the first connecting rod hexagonal prism 3.
Second connective bar 2 is cylindrical, and its link 10 sets up second connective bar hexagonal prism shape recess 4, link 10 sets up second connective bar link locking screw 6, second connective bar link locking screw 6 link up link 10, 2 tail ends of second connective bar set up second connective bar hexagonal prism 7, and it sets up second connective bar tail end locking screw 8.
The first connecting rod hexagonal prism 3 is inserted into the second connecting rod hexagonal prism groove 4, the locking screw 9 is inserted into the second connecting rod connecting end locking screw hole 6, penetrates through the first connecting rod locking screw hole 5, and penetrates through the connecting end 10, so that the first connecting rod 1 and the second connecting rod 2 can be detachably and fixedly connected.
And threads are arranged in the first connecting rod locking screw hole 5, the second connecting rod connecting end locking screw hole 6 and the second connecting rod tail end locking screw hole 8, so that the locking screw 9 can be inserted, detached and fixed.
The connecting end 10 of the second connecting rod 2 is increased in diameter to increase fixing strength of the connecting end 10.
The first connecting rod 1 and the second connecting rod 2 are made of titanium alloy.
The first connecting rod hexagonal prism 3 is identical to the second connecting rod hexagonal prism 7, and the first connecting rod locking screw hole 5 is identical to the second connecting rod tail end locking screw hole 8.
In the embodiment, the skin is cut above the original operation section until the first connecting rod hexagonal prism 3 is exposed, the second connecting rod hexagonal prism-shaped groove 4 of the second connecting rod 2 is sleeved on the first connecting rod hexagonal prism 3, the first connecting rod connecting end locking screw hole 5 and the second connecting rod connecting end locking screw hole 6 are aligned, the locking screw 9 is inserted into the second connecting rod connecting end locking screw hole 6, and passes through the first connecting rod locking screw hole 5 to penetrate through the connecting end 10, so that the first connecting rod 1 and the second connecting rod 2 can be detachably and fixedly connected, the locking screw 9 is locked through the screw thread, the first connecting rod hexagonal prism 3 is consistent with the second connecting rod hexagonal prism 7, the purpose is to reserve an interface for the third operation to be lengthened again, and the connection mode is the same as the above.
In order to ensure sufficient strength of the connecting end 10, the length of the locking screw 9 is increased due to the increased diameter of the connecting end 10 when the connecting end 10 is taken out for use.
The invention has the advantages that:
the invention has simple structure, reduces the production cost, does not need extra space, directly prolongs the length of the original connecting rod on the basis of the original connecting rod, does not need to reserve a longer tail end length, is easy to perform secondary operation, does not need excessive exposed wounds and reduces the operation wound.
The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. The utility model provides a fixed extension rod in backbone which characterized in that: the first connecting rod (1) is cylindrical, two ends of the first connecting rod are respectively provided with a first connecting rod hexagonal prism (3), and the first connecting rod hexagonal prism (3) is provided with a first connecting rod locking screw hole (5);
the second connecting rod (2) is cylindrical, a connecting end (10) of the second connecting rod is provided with a second connecting rod hexagonal prism-shaped groove (4), the connecting end (10) is provided with a second connecting rod connecting end locking screw hole (6), the second connecting rod connecting end locking screw hole (6) penetrates through the connecting end (10), the tail end of the second connecting rod (2) is provided with a second connecting rod hexagonal prism (7), and the second connecting rod tail end locking screw hole (8);
the first connecting rod hexagonal prism (3) is inserted into the second connecting rod hexagonal prism-shaped groove (4), the locking screw (9) is inserted into the second connecting rod connecting end locking screw hole (6), penetrates through the first connecting rod locking screw hole (5), runs through the connecting end (10), and is used for the first connecting rod (1) and the second connecting rod (2) to be detachably and fixedly connected.
2. The extension rod for internal fixation of spine according to claim 1, wherein: and threads are arranged in the first connecting rod locking screw hole (5), the second connecting rod connecting end locking screw hole (6) and the second connecting rod tail end locking screw hole (8) for the locking screw (9) to be inserted, detached and fixed.
3. The extension rod for internal fixation of spine according to claim 1, wherein: the connecting end (10) of the second connecting rod (2) is increased in diameter, so that the connecting end (10) is increased in fixing strength.
4. The extension rod for internal fixation of spine according to claim 1, wherein: the first connecting rod (1) and the second connecting rod (2) are made of titanium alloy.
5. The extension rod for internal fixation of spine according to claim 1, wherein: the first connecting rod hexagonal prism (3) is consistent with the second connecting rod hexagonal prism (7), and the first connecting rod locking screw hole (5) is consistent with the second connecting rod tail end locking screw hole (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010097608.6A CN111374743A (en) | 2020-02-17 | 2020-02-17 | Extension rod for internal fixation of spine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010097608.6A CN111374743A (en) | 2020-02-17 | 2020-02-17 | Extension rod for internal fixation of spine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111374743A true CN111374743A (en) | 2020-07-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010097608.6A Pending CN111374743A (en) | 2020-02-17 | 2020-02-17 | Extension rod for internal fixation of spine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111374743A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060195088A1 (en) * | 2005-02-02 | 2006-08-31 | Ronald Sacher | Adjustable length implant |
| US20090093820A1 (en) * | 2007-10-09 | 2009-04-09 | Warsaw Orthopedic, Inc. | Adjustable spinal stabilization systems |
| CN201558160U (en) * | 2009-12-01 | 2010-08-25 | 常州鼎健医疗器械有限公司 | Adjustable spinal rod |
| CN102860862A (en) * | 2011-07-04 | 2013-01-09 | 上海长征医院 | Detachable or cuttable connecting rod and application thereof to spine surgical operation |
| CN204520937U (en) * | 2015-03-10 | 2015-08-05 | 罗春山 | The spinal column internal fixation device of octagonal cross-section pitman |
| CN204520929U (en) * | 2015-03-10 | 2015-08-05 | 罗春山 | The spinal column internal fixation device of U-shaped cross-section pitman |
| US20160022316A1 (en) * | 2013-03-15 | 2016-01-28 | Anand K. Agarwal | Spinal Rods Formed From Polymer and Hybrid Materials and Growth Rod Distraction System Including Same |
| CN107028648A (en) * | 2017-05-05 | 2017-08-11 | 兰州大学 | Extender in backbone pitman body |
| CN108635032A (en) * | 2018-05-23 | 2018-10-12 | 中国医学科学院北京协和医院 | A kind of internal automatically-controlled elastic struts spinal growth bar system |
-
2020
- 2020-02-17 CN CN202010097608.6A patent/CN111374743A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060195088A1 (en) * | 2005-02-02 | 2006-08-31 | Ronald Sacher | Adjustable length implant |
| US20090093820A1 (en) * | 2007-10-09 | 2009-04-09 | Warsaw Orthopedic, Inc. | Adjustable spinal stabilization systems |
| CN201558160U (en) * | 2009-12-01 | 2010-08-25 | 常州鼎健医疗器械有限公司 | Adjustable spinal rod |
| CN102860862A (en) * | 2011-07-04 | 2013-01-09 | 上海长征医院 | Detachable or cuttable connecting rod and application thereof to spine surgical operation |
| US20160022316A1 (en) * | 2013-03-15 | 2016-01-28 | Anand K. Agarwal | Spinal Rods Formed From Polymer and Hybrid Materials and Growth Rod Distraction System Including Same |
| CN204520937U (en) * | 2015-03-10 | 2015-08-05 | 罗春山 | The spinal column internal fixation device of octagonal cross-section pitman |
| CN204520929U (en) * | 2015-03-10 | 2015-08-05 | 罗春山 | The spinal column internal fixation device of U-shaped cross-section pitman |
| CN107028648A (en) * | 2017-05-05 | 2017-08-11 | 兰州大学 | Extender in backbone pitman body |
| CN108635032A (en) * | 2018-05-23 | 2018-10-12 | 中国医学科学院北京协和医院 | A kind of internal automatically-controlled elastic struts spinal growth bar system |
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