CN104323844A - Pedicle screw capable of preventing screw base from expanding - Google Patents
Pedicle screw capable of preventing screw base from expanding Download PDFInfo
- Publication number
- CN104323844A CN104323844A CN201410579001.6A CN201410579001A CN104323844A CN 104323844 A CN104323844 A CN 104323844A CN 201410579001 A CN201410579001 A CN 201410579001A CN 104323844 A CN104323844 A CN 104323844A
- Authority
- CN
- China
- Prior art keywords
- screw
- nail seat
- nail
- pedicle
- expanding
- 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.)
- Pending
Links
Classifications
-
- 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
-
- 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
-
- 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
- A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
- A61B17/7076—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation
-
- 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8665—Nuts
-
- 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8685—Pins or screws or threaded wires; nuts therefor comprising multiple separate parts
-
- 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8665—Nuts
- A61B2017/867—Nuts with integral locking or clamping means
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Neurology (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The invention relates to a pedicle screw capable of preventing a screw base from expanding, belonging to the technical field of medicinal apparatuses. The pedicle screw comprises a screw body (1) and the screw base (2) connected with the screw body (1), wherein the screw base (2) is provided with a U-shaped groove (4) and a threaded hole (5) which are connected with a connecting rod (3); the threaded hole (5) is meshed with a locking nut (6) for locking the connecting rod (3). The pedicle screw is characterized in that the outer wall of the screw base (2) is sleeved by an expansion-proof sleeve (7) capable of preventing the screw base (2) from expanding. The pedicle screw disclosed by the invention is capable of preventing the wall of the screw base from expanding in case of the reaction force of the connecting rod and the compression force of the locking nut and eliminating the potential hazard that the lower part of the screw base is easy to deform and even damage due to special concentration of the stress and very concentration of the force. The pedicle screw is simple in structure, small in size, convenient to operate in a surgery and easy to popularize, and since the increased manufacturing cost is very limited, the popularization is easy.
Description
Technical field
The invention belongs to technical field of medical instruments, be specifically related to a kind of pedicle nail that can prevent nail seat distending.
Background technology
At present, both at home and abroad in Via Posterior Spinal Approach internal fixation operation, capital uses the internal fixtion that pedicle nail and pitman carry out Via Posterior Spinal Approach, there has been proposed as publication number: 101803944A " a kind of pedicle nail ", publication number: 10206803A " a kind of pedicle nail ", notification number: 101732086A " pedicle nail with orthopedic ", notification number: 201996649U " a kind of novel pedicle nail " etc. are about the technical scheme of " pedicle nail " for this reason.And be all adopt " lock nut " or claim " clamp nut " to be fixed connection between pedicle nail and pitman, because operation needs, pedicle nail nail seat adopts the design of open-top screw thread and U-type groove, after lock nut to coordinate with pedicle nail and locks pitman, because pitman also can produce counteracting force to the nail seat of lock nut and pedicle nail while being subject to lock nut thrust, nail seat its wall under the effect of counteracting force will expand distending, result causes the contact area of the screw thread of both lock nut and nail seat to reduce, lock nut locking pitman poor effect is caused directly to cause the appearance of lock nut stripped thread phenomenon.In addition, the lower portion of nail seat is rivet nut below it, is U-type groove, so stress is herein concentrated especially above it; And in operation process, rivet nut very long below will screw in spinal column, screwed hole above can be subject to it with the extruding of the lock nut engaged, so the power be subject to is also very concentrated herein, because above-described factors, the lower portion of nail seat is easy to distortion and even damages.But it is all described above about not overcoming the technical scheme of above-mentioned disadvantage in the prior art of " pedicle nail ".
Summary of the invention
The object of the invention is for prior art exist disadvantage, a kind of pedicle nail that can prevent nail seat distending is provided, it can effectively prevent nail seat when be subject to pitman counteracting force, lock nut thrust its wall expand distending; Eliminate the hidden danger that lower portion stress is concentrated especially, stressed very concentrated brought easy distortion even damages of nail seat.
Above-mentioned goal of the invention is achieved through the following technical solutions:
A kind of pedicle nail that can prevent nail seat distending, the nail seat comprising rivet nut and be connected with rivet nut, described nail seat is provided with the U-type groove and screwed hole that connect pitman, screwed hole is meshed with a lock nut locking pitman, and its main points are that nail seat outer wall is set with the anti-expansion set preventing nail seat from expanding distending.
As preferably, two sides of described anti-expansion set symmetry are provided with pitman can through the arc groove coincide with U-type groove in nail seat, and it is set in nail seat pitman and passes and the lower portion locked.
As preferably, lock nut top is provided with anti-back sheet, and anti-back sheet two side is stretched out U-type groove part and is placed in anti-expansion set top.
The present invention prevents nail seat from expanding the anti-expansion set of distending because nail seat outer wall is set with, thus makes the outer wall of nail seat obtain reinforcing, it can effectively prevent nail seat when be subject to pitman counteracting force, lock nut thrust its wall expand distending; Eliminate the hidden danger that lower portion stress is concentrated especially, stressed very concentrated brought easy distortion even damages of nail seat; In addition, lock nut top is provided with anti-back sheet, anti-back sheet two side is stretched out U-type groove part and is placed in anti-expansion set top, operation consent anti-back sheet 9 uses laser weld at anti-expansion set (7) top, in operation, the anti-expansion set 7 of band anti-back sheet 9 is set in the lower portion of nail seat 2, thus can permanently prevents from lock nut from loosening moving; Further, its structure is simple, volume is little, uses easy to operate in operation, and the manufacturing cost increased is also very limited, so easily promote.
Accompanying drawing explanation
Fig. 1: structural representation of the present invention
The axonometric chart of Fig. 2: Fig. 1
Fig. 3: using state figure of the present invention
In Fig. 1-3,1-rivet nut, 2-nail seat, 3-pitman, 4-U type groove, 5-screwed hole, 6-lock nut, the anti-expansion set of 7-, 8-arc groove, 9-anti-back sheet.
Detailed description of the invention
Just Fig. 1--the invention will be further described for the embodiment face represented by 3 below.
The nail seat 2 that it comprises rivet nut 1 and is connected with rivet nut 1, described nail seat 2 is provided with the U-type groove 4 and screwed hole 5 that connect pitman 3, the lock nut 6 that screwed hole 5 and locks pitman 3 is meshed, and nail seat 1 outer wall is set with the anti-expansion set 7 preventing nail seat 1 from expanding distending; Two sides of described anti-expansion set 7 symmetry are provided with pitman 3 can through the arc groove 8 identical with U-type groove in nail seat 14, and it is set in nail seat 2 pitman 3 and passes and the lower portion locked; Lock nut 6 top is provided with anti-back sheet 9, and anti-back sheet 9 two side is stretched out U-type groove 4 part and is placed in anti-expansion set 7 top.
The use operation of the present embodiment is as follows: first screw in spinal column by the rivet nut 1 of two " a kind of can prevent the pedicle nail of nail seat distending ", by the U-type groove 4 of pitman 3 through two nail seats 2, then lock nut 6 is along screwed hole 5 toward backspin, until pitman 3 compact lock is fixed in U-type groove 4, then operation consent anti-back sheet 9 has been set in the lower portion of nail seat 2 at the anti-expansion set 7 at anti-expansion set 7 top by laser weld, anti-expansion set 7 can prevent from lock nut 6 from loosening moving.
Claims (3)
1. one kind can prevent the pedicle nail of nail seat distending, the nail seat (2) comprising rivet nut (1) and be connected with rivet nut (1), described nail seat (2) is provided with the U-type groove (4) and screwed hole (5) that connect pitman (3), the lock nut (6) that screwed hole (5) and locks pitman (3) is meshed, and it is characterized in that nail seat (1) outer wall is set with the anti-expansion set (7) preventing nail seat (1) from expanding distending.
2. a kind of pedicle nail that can prevent nail seat distending according to claim 1, it is characterized in that, two sides of described anti-expansion set (7) symmetry are provided with the arc groove (8) that pitman (3) can pass and the upper U-type groove 4 of nail seat (1) is coincide, and it is set in nail seat (2) pitman (3) and passes and the lower portion locked.
3. a kind of pedicle nail that can prevent nail seat distending according to claim 1 and 2, is characterized in that, lock nut (6) top is provided with anti-back sheet (9), and anti-back sheet (9) two side is stretched out U-type groove (4) part and is placed in anti-expansion set (7) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410579001.6A CN104323844A (en) | 2014-10-24 | 2014-10-24 | Pedicle screw capable of preventing screw base from expanding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410579001.6A CN104323844A (en) | 2014-10-24 | 2014-10-24 | Pedicle screw capable of preventing screw base from expanding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104323844A true CN104323844A (en) | 2015-02-04 |
Family
ID=52398762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410579001.6A Pending CN104323844A (en) | 2014-10-24 | 2014-10-24 | Pedicle screw capable of preventing screw base from expanding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104323844A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998027884A1 (en) * | 1996-12-20 | 1998-07-02 | Haider Thomas T | Pedicle screw system for osteosynthesis |
| CN2907560Y (en) * | 2005-01-05 | 2007-06-06 | 于海鹰 | Intravertebral immobilizer with anti-expansion direction-changing screw |
| CN201143228Y (en) * | 2008-01-25 | 2008-11-05 | 上海浦卫医疗器械厂 | Vertebral column internal fixation nail stick |
| CN103099660A (en) * | 2011-11-14 | 2013-05-15 | 比德尔曼技术有限责任两合公司 | Polyaxial bone anchoring device |
| CN204158474U (en) * | 2014-10-24 | 2015-02-18 | 浙江科惠医疗器械有限公司 | A kind of pedicle nail that can prevent nail seat distending |
-
2014
- 2014-10-24 CN CN201410579001.6A patent/CN104323844A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998027884A1 (en) * | 1996-12-20 | 1998-07-02 | Haider Thomas T | Pedicle screw system for osteosynthesis |
| CN2907560Y (en) * | 2005-01-05 | 2007-06-06 | 于海鹰 | Intravertebral immobilizer with anti-expansion direction-changing screw |
| CN201143228Y (en) * | 2008-01-25 | 2008-11-05 | 上海浦卫医疗器械厂 | Vertebral column internal fixation nail stick |
| CN103099660A (en) * | 2011-11-14 | 2013-05-15 | 比德尔曼技术有限责任两合公司 | Polyaxial bone anchoring device |
| CN204158474U (en) * | 2014-10-24 | 2015-02-18 | 浙江科惠医疗器械有限公司 | A kind of pedicle nail that can prevent nail seat distending |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 321016 Zhejiang Province, Jinhua city Wucheng District Xianghua Street No. 466 Applicant after: Zhejiang Ke Hui Medical Treatment Equipment Co., Ltd Address before: 321016 Zhejiang city in Jinhua Province, Xinhua Street No. 466 Applicant before: Zhejiang Canwell Medical Co., Ltd. |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: KEHUI MEDICAL EQUIPMENT CO., LTD., ZHEJIANG TO: ZHEJIANG CANWELL MEDICAL CO., LTD. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150204 |