CN105342677A - Pedicle screw - Google Patents
Pedicle screw Download PDFInfo
- Publication number
- CN105342677A CN105342677A CN201510870468.0A CN201510870468A CN105342677A CN 105342677 A CN105342677 A CN 105342677A CN 201510870468 A CN201510870468 A CN 201510870468A CN 105342677 A CN105342677 A CN 105342677A
- Authority
- CN
- China
- Prior art keywords
- screw
- nail
- cannelure
- type groove
- rod
- 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
- A61B17/683—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin comprising bone transfixation elements, e.g. bolt with a distal cooperating element such as a nut
-
- 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
-
- 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
-
- 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
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
- A61B17/861—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
- A61B17/8615—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver at the central region of the screw head
-
- 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
- A61B17/8625—Shanks, i.e. parts contacting bone tissue
-
- 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
- A61B2017/564—Methods for bone or joint treatment
Abstract
The invention provides a pedicle screw. The pedicle screw comprises a U-shaped screw body, a locking cap, a locking block and a screw rod, the U-shaped screw body is provided with a screw portion, a screw base is arranged at the upper end of the screw portion, a blind hole and a U-shaped groove penetrating through the side face of the blind hole are formed in the upper end of the screw base, the screw rod is arranged at the bottom of the U-shaped groove, the locking block is provided with a V-shaped groove with an opening facing downward, the locking block is arranged in the blind hole, the V-shaped groove is arranged above the screw rod in a capping mode, a threaded rod is arranged at the upper end of the locking block, the locking cap is provided with a threaded hole and screwed on the threaded rod, a tool hole is formed in the upper end of the threaded hole, annular grooves are formed in the inner sides of the two walls of the U-shaped groove, two bosses are symmetrically arranged at the periphery of the locking cap, the two bosses are screwed into the annular grooves simultaneously from the U-shaped groove, the screwing direction of the two bosses is opposite to that of a thread of the threaded hole of the locking cap, and while the locking cap is rotated, the locking block propels downward to lock the screw rod tightly. The pedicle screw is simple in structure and convenient to operate, the screw rod is locked tightly through small-angle rotation of the locking cap in combination with propelling of the reverse thread, operation time is saved, moreover, firm and reliable locking is achieved, and thereby the success rate of an operation can be raised.
Description
Technical field
The present invention relates to orthopedic medical device field, especially a kind of pedicle nail.
Background technology
The application of pedicle nail in spinal operation in recent years gets more and more, and is applicable to the diseases such as treatment thoracic and lumbar vertebral posterior short segment wound, tumor and unstable spine.Current pedicle nail, primarily of U-shaped nail, locking jackscrew and nail rod composition.The locking mode of its nail rod, by the screw-internal thread fit on the U-shaped nail seat two side of jackscrew and U-shaped nail and pressing pin is excellent, need to rotate jackscrew many circles during pressing pin rod, extend operating time, and, when coupling mechanism force is larger, also can make nail seat two side softened or support distortion, cause stripped thread phenomenon, thus cause nail rod loosen or exit, make operative failure, and, postoperative time return period is longer, during this, human body needs activity, can make pedicle nail that long fine motion occurs, thus simple jackscrew directly compresses mode, also there is the possibility loosening and even move back rod, and structural volume is larger, be unfavorable for stitching and the treatment of otch.
Summary of the invention
The invention discloses a kind of pedicle nail, overcome above-mentioned defect, it mainly comprises U-shaped nail, lock nut, lock dog and nail rod, described U-shaped nail is provided with screw division, described screw division upper end is provided with nail seat, described nail seat outer rim is provided with two and holds nail, described nail seat upper end is provided with the U-type groove of blind hole and through blind hole and nail seat side, described nail rod is placed in bottom described U-type groove, described lock dog lower end is provided with through side and the V-type groove that Open Side Down, described lock dog is placed in described blind hole, and described V-type groove bandit is on described nail rod, described lock dog upper end is provided with screw rod, described lock nut is provided with screw and is threaded onto on described screw rod, described screw upper end is provided with tooling hole, lock nut is rotated for fastening means, it is characterized in that: the inner side of described U-type groove two wall is provided with cannelure, described lock nut outer rim is arranged with two boss, described two boss screw in described cannelure by U-type groove simultaneously, its rotation direction is contrary with the thread rotary orientation of the screw of described lock nut, make while the described lock nut of rotation, described lock dog advances downwards and locks described nail rod.Conveniently described boss screws in described cannelure, guiding surface is provided with on the upside of described boss, this inclined-plane also can make described lock nut advance downwards and assist described lock dog pressing pin rod, described cannelure is provided with spacer pin and screws out cannelure to prevent described boss, the upper side of described cannelure is set to inclined-plane, make bottom land wider than notch, described boss shape is set to the shape identical with described cannelure and matches with cannelure, described cannelure also can be set to dovetail groove or T-slot or L-type groove, simultaneously described boss is also set to swallow-tail form or T-shaped or L-type and described dovetail groove or T-slot or L-type groove respectively and matches, for preventing described U-type groove two side to be outwards out of shape, described boss is deviate from from described cannelure, thus the defect overcome existing for current pedicle nail.Structure of the present invention is simple, easy to operate, coordinates reverse thread to advance will follow closely excellent locking, and not only save operating time, and lock solid and reliable, thus improve the success rate of operation through lock nut small angle rotation.
Accompanying drawing illustrates:
Fig. 1 is the schematic diagram of a kind of pedicle nail of the present invention;
Fig. 2 is the partial sectional view of U-shaped nail in Fig. 1;
Fig. 3 is the schematic diagram of lock dog in Fig. 1;
Fig. 4 is the schematic diagram of lock nut in Fig. 1.
Fig. 5 is the sectional view of Fig. 4;
In accompanying drawing: 1U sprig, 2 lock nuts, 3 lock dogs, 4 spacer pins, 1-1 cannelure, 1-2 blind hole, 1-3 pin-and-hole, 2-1 boss, 2-2 screw, 2-3 tooling hole, 2-4 inclined-plane, 3-1V type groove, 3-2 screw rod.
Embodiment:
Fig. 1 to Fig. 5 shows the embodiment of a kind of pedicle nail of the present invention.
A kind of pedicle nail of the present invention, mainly comprise U-shaped nail 1, lock nut 2, lock dog 3 and nail rod, described U-shaped nail 1 is provided with screw division, described screw division upper end is provided with nail seat, described nail seat outer rim is provided with two and holds nail, described nail seat upper end is provided with the U-type groove of blind hole 1-2 and through blind hole 1-2 and nail seat side, described nail rod is placed in bottom described U-type groove, described lock dog 3 lower end is provided with through side and the V-type groove 3-1 that Open Side Down, described lock dog 3 is placed in described blind hole 1-2, and described V-type groove bandit is on described nail rod, described lock dog 3 upper end is provided with screw rod 3-2, described lock nut 2 be provided with screw 2-2 and revolve with described screw rod 3-2 on, described screw 2-2 upper end is provided with tooling hole 2-3, lock nut is rotated for fastening means, it is characterized in that: the inner side of described U-type groove two wall is provided with cannelure 1-1, two boss 2-1 are arranged with outside described lock nut 2, described two boss 2-1 screw in described cannelure 1-1 by U-type groove simultaneously, its rotation direction is contrary with the thread rotary orientation of described lock nut 2 screw 2-2, make while the described lock nut 2 of rotation, described lock dog 3 advances the described nail rod of locking downwards.Conveniently described boss 2-1 screws in described cannelure 1-1, guiding surface 2-4 is provided with on the upside of described boss 2-1, this inclined-plane 2-4 also can make described lock nut 2 advance downwards and assist pressing pin rod, described cannelure 1-1 is provided with pin-and-hole 1-3, for mounting limit pin 4, cannelure 1-1 is screwed out to prevent described boss 2-1, the upper side of described cannelure 1-1 is set to inclined-plane, make bottom land wider than notch, described boss 2-1 shape is set to the shape identical with described cannelure 1-1 and matches with cannelure 1-1, described cannelure 1-1 also can be set to dovetail groove or T-slot or L-type groove, simultaneously described boss 2-1 is also set to swallow-tail form or T-shaped or L-type and described dovetail groove or T-slot or L-type groove respectively and matches, for preventing described U-type groove two side to be outwards out of shape, described boss 2-1 is deviate from from described cannelure 1-1.
Claims (6)
1. a pedicle nail, mainly comprise U-shaped nail (1), lock nut (2), lock dog (3) and nail rod, described U-shaped nail (1) is provided with screw division, described screw division upper end is provided with nail seat, described nail seat outer rim is provided with two and holds nail, described nail seat upper end is provided with the U-type groove of blind hole (1-2) and through blind hole (1-2) and nail seat side, described nail rod is placed in bottom described U-type groove, described lock dog (3) lower end is provided with through side and the V-type groove (3-1) that Open Side Down, described lock dog (3) is placed in described blind hole (1-2), and described V-type groove (3-1) bandit is on described nail rod, described lock dog (3) upper end is provided with screw rod (3-2), described lock nut (2) be provided with screw (2-2) and revolve with described screw rod (3-2) on, described screw (2-2) upper end is provided with tooling hole (2-3), it is characterized in that: the inner side of described U-type groove two wall is provided with cannelure (1-1), described lock nut (2) outer rim is arranged with two boss (2-1), described two boss (2-1) screw in described cannelure (1-1) by U-type groove simultaneously, its rotation direction is contrary with the thread rotary orientation of described lock nut (2) screw (2-2).
2. a kind of pedicle nail according to claim 1, is characterized in that: described boss (2-1) is provided with guiding surface (2-4).
3. a kind of pedicle nail according to claim 1, is characterized in that: described cannelure (1-1) is provided with spacer pin (4).
4. a kind of pedicle nail according to claim 1 or 2 or 3, is characterized in that: the upper side of described cannelure (1-1) is set to inclined-plane.
5. a kind of pedicle nail according to claim 4, is characterized in that: described boss (2-1) shape is set to the shape identical with described cannelure (1-1) and matches with cannelure (1-1).
6. a kind of pedicle nail according to claim 1 or 2 or 3, it is characterized in that: described cannelure (1-1) is set to dovetail groove or T-slot or L-type groove, described boss (2-1) is also set to swallow-tail form or T-shaped or L-type and described dovetail groove or T-slot or L-type groove respectively and matches simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510870468.0A CN105342677A (en) | 2015-11-25 | 2015-11-25 | Pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510870468.0A CN105342677A (en) | 2015-11-25 | 2015-11-25 | Pedicle screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105342677A true CN105342677A (en) | 2016-02-24 |
Family
ID=55318854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510870468.0A Pending CN105342677A (en) | 2015-11-25 | 2015-11-25 | Pedicle screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105342677A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105943143A (en) * | 2016-06-30 | 2016-09-21 | 山东威高骨科材料股份有限公司 | Reduction and internal fixation device for injury of lumbar vertebra, sacrum and ilium pelvis |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2398981Y (en) * | 1999-12-15 | 2000-10-04 | 邹德威 | Reduction fixed bone orthopedic appts. |
| WO2006047555A2 (en) * | 2004-10-25 | 2006-05-04 | Alphaspine, Inc. | Bone fixation systems and methods |
| WO2008024937A2 (en) * | 2006-08-23 | 2008-02-28 | Pioneer Surgical Technology, Inc. | Minimally invasive surgical system |
| WO2009006225A2 (en) * | 2007-06-28 | 2009-01-08 | Spinal Elements, Inc. | Spinal stabilization device |
| CN201185960Y (en) * | 2008-04-25 | 2009-01-28 | 刘伟强 | Medical vertebral pedicle screw nail mechanism |
| CN203647452U (en) * | 2013-12-09 | 2014-06-18 | 嘉兴德康医疗器械有限公司 | Vertebral pedicle compressing and locking device of spine screw-rod system |
| CN205144695U (en) * | 2015-11-25 | 2016-04-13 | 山东航维骨科医疗器械股份有限公司 | Pedicle nail of vertebral arch |
-
2015
- 2015-11-25 CN CN201510870468.0A patent/CN105342677A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2398981Y (en) * | 1999-12-15 | 2000-10-04 | 邹德威 | Reduction fixed bone orthopedic appts. |
| WO2006047555A2 (en) * | 2004-10-25 | 2006-05-04 | Alphaspine, Inc. | Bone fixation systems and methods |
| WO2008024937A2 (en) * | 2006-08-23 | 2008-02-28 | Pioneer Surgical Technology, Inc. | Minimally invasive surgical system |
| WO2009006225A2 (en) * | 2007-06-28 | 2009-01-08 | Spinal Elements, Inc. | Spinal stabilization device |
| CN201185960Y (en) * | 2008-04-25 | 2009-01-28 | 刘伟强 | Medical vertebral pedicle screw nail mechanism |
| CN203647452U (en) * | 2013-12-09 | 2014-06-18 | 嘉兴德康医疗器械有限公司 | Vertebral pedicle compressing and locking device of spine screw-rod system |
| CN205144695U (en) * | 2015-11-25 | 2016-04-13 | 山东航维骨科医疗器械股份有限公司 | Pedicle nail of vertebral arch |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105943143A (en) * | 2016-06-30 | 2016-09-21 | 山东威高骨科材料股份有限公司 | Reduction and internal fixation device for injury of lumbar vertebra, sacrum and ilium pelvis |
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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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160224 |
|
| RJ01 | Rejection of invention patent application after publication |