CN201279181Y - Pedicle screw internal fixation device - Google Patents
Pedicle screw internal fixation device Download PDFInfo
- Publication number
- CN201279181Y CN201279181Y CNU2008201546520U CN200820154652U CN201279181Y CN 201279181 Y CN201279181 Y CN 201279181Y CN U2008201546520 U CNU2008201546520 U CN U2008201546520U CN 200820154652 U CN200820154652 U CN 200820154652U CN 201279181 Y CN201279181 Y CN 201279181Y
- Authority
- CN
- China
- Prior art keywords
- screw
- bolt
- head
- thread
- threads
- 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.)
- Expired - Fee Related
Links
- 230000000295 complement effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000001356 surgical procedure Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
Images
Landscapes
- Surgical Instruments (AREA)
Abstract
The utility model belongs to the technical field of medical instrument, in particular to a fixing device in a pedicle screw, which consists of a screw, a bolt and a connecting bars; the head of the screw is provided with a thread groove; the two sides of the head of the screw are provided with bayonets; an inner core of the bolt is hexagonal and each edge is provided with a tooth slot; and the bolt is provided with a tooth bulge which is positioned at the contacting part of the bolt and the connecting bar. The thread groove of the head of the screw has internal threads; the threads of the bolt are of external threads; the internal threads and the external threads are mutually matched; and when the bolt is locked, the thread groove of the head of the screw and the threads of the bolt are tightly embedded. The fixing device has the advantages that the design of the head of the screw and the special threads of the bolt can have effect of reducing the tension of the head of the screw when in locking; the shape of the bottom part of the screw prevents the head of the nail from loosening; and with the inner core of the bolt, the screw is convenient to lock and unlock, thus avoiding sliding thread.
Description
Technical field
This utility model belongs to technical field of medical instruments, is specifically related to a kind of pedicle screw fixation device.
Background technology
In the last thirty years, the application of internal fixation device has greatly advanced the development of spinal surgery.Cervical arc root screw internal fixing system is one of internal fixation device that is most widely used in the spinal surgery.At present, the pedicle screw apparatus major part of domestic use is import, and its price is very expensive.Its design concept of multiple pedicle screw system of domestic design is more outmoded, and operation is very complicated relatively.And the utilization modern concepts designs various spinal internal fixation systems with independent intellectual property right for reducing medical expense, improves therapeutic effect, promotes China's spinal surgery level of development to have very important and practical value.
Summary of the invention
The purpose of this utility model has in a kind of pedicle screw fixation device is provided.
The pedicle screw fixation device that the utility model proposes, be made up of screw 1, bolt 2 and pitman 3, screw 1 is formed by connecting by screw head 5 and screw afterbody 4, has the through slot that pitman is installed on the screw head 5, have thread groove 6 on the through slot, screw head 5 both sides are provided with bayonet socket 7; Bolt inner core 10 is hexagon, be provided with a teeth groove on each limit, the outside of bolt 2 is provided with screw thread 9, and the screw thread 9 on the bolt 2 is complementary with thread groove 6 structures on the screw 1, bolt 2 is provided with profile of tooth projection 8, and this profile of tooth projection 8 is positioned at bolt 2 and screw 1 connecting place.
In this utility model, the thread groove 6 of screw head 5 is a female thread, screw thread 9 on the bolt 2 is an external screw thread, be provided with groove between the through slot of thread groove 6 and screw head 5, correspondingly, screw thread 9 on the bolt 2 is provided with groove, and when clamping screw 2, the thread groove 6 of screw head 5 is closely chimeric with the screw thread 10 on the bolt 2.
Using method of the present utility model is as follows: at first pedicle screw being screwed into needs in the fixed pedicle of vertebral arch, and then pitman is put into the head recess of pedicle screw, again bolt is screwed into the pedicle screw head, tights a bolt and finishes locking.
The beneficial effects of the utility model are: this utility model is mainly used in the patient that spinal operation needs multiple screws, its major advantage is: reduce the tensile effect of screw head when the screw thread design of screw head and bolt can play locking, the shape of bolt bottom surface can prevent that also screw head is loosening in addition, the inner core of bolt be convenient to bolt locking and taking-up, avoid stripped thread.
This utility model is simple in structure, and is novel, easy to use.
Description of drawings
Fig. 1 is the structural diagrams of this utility model screw 1.
Fig. 2 is the schematic cross-section that is positioned at the thread groove 6 of screw head.
Fig. 3 is the structural diagrams of bolt 2.
Fig. 4 is the schematic cross-section of bolt thread 9.
Fig. 5 is the structural representation of bolt inner core 10.
Fig. 6 is a structural representation of the present utility model.
Number in the figure: 1 is screw, and 2 is bolt, and 3 is pitman, and 4 is the screw afterbody, and 5 is screw head, and 6 is the thread groove of screw head, and 7 is the bayonet socket (lifting reduction forceps retaining part) of screw bilateral, and 8 is the profile of tooth projection, and 9 is the screw thread of bolt, and 10 is the bolt inner core.
The specific embodiment
Further specify this utility model below by embodiment.
Embodiment 1: this device is made up of screw 1, bolt 2 and pitman 3, and its structure as shown in Figure 6.Screw 1 is formed by connecting by screw head 5 and screw afterbody 4, and its structure as shown in Figure 1.Wherein, screw head 5 is round blunt shape, thus when tightening, be difficult for to form via, simultaneously guide function can be arranged; Have the through slot that pitman is installed on the screw head 5, have thread groove 6 on the through slot, thread groove 6 extends to the top always, plays the effect of self tapping, and screw head 5 both sides are provided with bayonet socket 7; The structure of bolt is seen Fig. 3 and Fig. 5, bolt inner core 10 is hexagon, on each limit, be provided with a teeth groove, make bolt when locking and taking-up, be difficult for stripped thread, the outside of bolt 2 is provided with screw thread 9, and the screw thread 9 on the bolt 2 is complementary with thread groove 6 structures on the screw 1, and bolt 2 is provided with profile of tooth projection 8, this profile of tooth projection 8 is positioned at bolt 2 and pitman 3 contacts site, is used to reduce screw becoming flexible after locking.
The thread groove 6 of screw head 5 is a female thread, and the screw thread 9 on the bolt 2 is an external screw thread, and both mate mutually, and when clamping screw 2, the thread groove 6 of screw head 5 is closely chimeric with the screw thread on the bolt 2.Thread groove 6 is seen Fig. 2 and Fig. 4 respectively with the schematic cross-section of screw thread 9.
This utility model can be with rustless steel or titanium alloy material production, and screw 1 needs the specification of various different lengths and thickness.The diameter of pitman 3 can be 5.5mm.Screw 1 length can have 25mm, 30mm, 35mm, 40mm, 45mm, 50mm; And the diameter of screw can have 5.0mm, 6.0mm, 7.0mm.Described parts are connected by Fig. 1-mode shown in Figure 6, and these those skilled in the art all can smooth implementation.
Claims (2)
1, a kind of pedicle screw fixation device, form by screw (1), bolt (2) and pitman (3), screw (1) is formed by connecting by screw head (5) and screw afterbody (4), it is characterized in that having on the screw head (5) thread groove (6), and screw head (5) both sides are provided with bayonet socket (7); Bolt inner core (10) is hexagon, on each limit, be provided with a teeth groove, the outside of bolt (2) is provided with screw thread (9), thread groove (6) structure on screw thread (9) on the bolt (2) and the screw (1) is complementary, bolt (2) is provided with profile of tooth projection (8), and this profile of tooth projection (8) is positioned at bolt (2) and pitman (3) contact site.
2, pedicle screw fixation device according to claim 1, the thread groove (6) that it is characterized in that screw head (5) is a female thread, screw thread (9) on the bolt (2) is an external screw thread, both mate mutually, when clamping screw (2), the thread groove (6) of screw head (5) is closely chimeric with the screw thread (10) on the bolt (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201546520U CN201279181Y (en) | 2008-10-30 | 2008-10-30 | Pedicle screw internal fixation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201546520U CN201279181Y (en) | 2008-10-30 | 2008-10-30 | Pedicle screw internal fixation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201279181Y true CN201279181Y (en) | 2009-07-29 |
Family
ID=40926069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201546520U Expired - Fee Related CN201279181Y (en) | 2008-10-30 | 2008-10-30 | Pedicle screw internal fixation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201279181Y (en) |
-
2008
- 2008-10-30 CN CNU2008201546520U patent/CN201279181Y/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103393458A (en) | Anatomic calcaneus locking bone plate | |
| CN204931822U (en) | Locking compress bridge joining composite internal fixation system | |
| CN203915048U (en) | Novel combination type fracture of calcaneus internal fixation steel plate | |
| CN201279181Y (en) | Pedicle screw internal fixation device | |
| CN201135488Y (en) | Tension band steel plate for orthopaedics | |
| CN202942197U (en) | Sliding intramedullary needle for treating osteogenesis imperfecta of minors | |
| CN202386766U (en) | Distal radius bone plate with multifunctional screw hole | |
| CN201591617U (en) | Novel patella locking nail | |
| CN201279182Y (en) | General-purpose cross binding device | |
| CN201996650U (en) | Double-headed hollow forcing screw | |
| CN203417254U (en) | Anatomical type locking calcaneus bone fracture plate | |
| CN204133590U (en) | Knee joint fusion steel plate | |
| CN201591618U (en) | Medical bone screw | |
| CN204951130U (en) | Orthopedics implant cable device | |
| CN204072288U (en) | A kind of monolateral exterior fixation bracket | |
| CN204951133U (en) | Hollow locking of orthopedics implant nail | |
| CN202426638U (en) | Steel wire for orthopedic surgery | |
| CN204542334U (en) | A kind of fracture fixation device | |
| CN116602749B (en) | Compression locking screw and compression locking integrated bone plate nail system | |
| CN202821581U (en) | Novel toothed screw pad assembly for curing avulsion fracture | |
| CN202288435U (en) | Broken-type threaded location needle | |
| CN213665655U (en) | Double-end pressurization hollow screw | |
| CN202497229U (en) | Anti-loose hollow compression screw used for fracture internal fixation | |
| CN104586491A (en) | Lateral distal tibial bone plate | |
| CN203447340U (en) | Femur holder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ARMY MEDICAL UNIV. NO.2, CHINESE PLA Free format text: FORMER OWNER: LI MING Effective date: 20120130 Free format text: FORMER OWNER: HE SHISHENG Effective date: 20120130 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120130 Address after: 200433 Yangpu District Xiang Yin Road, No. 800, Shanghai Patentee after: Army Medical Univ. No.2, Chinese PLA Address before: 200433 Department of orthopedics, Changhai Hospital of Shanghai, No. 168 Changhai Road, Shanghai Co-patentee before: He Shisheng Patentee before: Li Ming |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090729 Termination date: 20121030 |