CN201088617Y - Drop-prevention device of screw of anterior cervical plate system - Google Patents
Drop-prevention device of screw of anterior cervical plate system Download PDFInfo
- Publication number
- CN201088617Y CN201088617Y CNU2007200726112U CN200720072611U CN201088617Y CN 201088617 Y CN201088617 Y CN 201088617Y CN U2007200726112 U CNU2007200726112 U CN U2007200726112U CN 200720072611 U CN200720072611 U CN 200720072611U CN 201088617 Y CN201088617 Y CN 201088617Y
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- steel plate
- groove
- bone screw
- anterior cervical
- tabletting
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Abstract
An anterior cervical panel pin system bone screw anti-recede apparatus is provided, which relates to the technical field of the spine surgery medical apparatus, in particular to a novel anterior cervical panel pin system bone screw anti-recede appliance. The appliance comprises a lock tabletting and a steel plate, and is characterized in that: a circle groove is arranged on the steel plate, and a hole is positioned at the middle of the groove, at the same time, two mini-pores are arranged besides the groove, and the two mini-pores are arranged in a circular arch shaped in opposite to the hole at the middle of the groove. The lock tabletting is in triangular shape, wherein, a spherical bulge is arranged on the contact surface of an end of the triangle and the steel plate; the hexangular or quincunx shaped holes are positioned on the lock tabletting; the distance between the spherical bulge and the hole at the middle of the groove is equal to the distance between the two mini-pores on the steel plate and the hole at the middle of the groove on the steel plate. The utility model has the advantages of reasonable design, unique and novel construction, simple manufacture and process, convenient clinic operation and great operation failure risk reduction.
Description
Technical field:
This utility model relates to the spinal surgery technical field of medical instruments, is specifically related to the anti-unloading device of a kind of novel anterior cervical plates nail system bone screw.
Background technology:
Diseases such as the preceding road of spinal surgery using cervical vertebra plate nail system technology treatment cervical vertebra regression at present,, wound, tumor are very universal.Developed the anterior cervical plates nail system from Bohler in 1964,, multiple structural design occurred through 40 years of development.Studies show that preceding road plate nail system can increase the bone fusion rate, and can increase the anti-spin intensity of cervical vertebra, axial load and the anti-Qu Li that stretches.Because human spine's special physiological structure and activity frequency, design and manufacturing requirement for the lamina of cervical vertebra nail system are very high, not only will have good biomechanical strength, require to have narrower width simultaneously, lower incisura will have the anti-device that withdraws from of firm bone screw simultaneously.Clinical proof withdraws from device if no additional reliable bone screw is anti-, causes the loosening of bone screw easily and withdraws from steel plate, causes internal fixation operation to fail.The lamina of cervical vertebra nail system of Shi Yonging in the market, major part design all that the different bone screw of various designs is anti-to withdraw from device, and the Orion system of Sofamar is typically arranged, and adopt one piece of lock-screw to lock two pieces of bone screw simultaneously; The ABC system of Aesculap company adopts the swell fixture and firm and hard existing connection that are positioned at the bone screw afterbody, in case bone screw withdraws from.The Codman system that Acromed company produces adopts the cam mechanism locking that is sunken in the plate, prevents that bone screw from withdrawing from.
In recent years, some spinal column doctors and medical apparatus and instruments producer that China is domestic also developed Related product in succession, and design level is lower, prevent withdrawing from device although have, but the certain limitation of many existence, even also there is the technological deficiency that gets loose in anti-unloading device itself.
Summary of the invention:
Purpose of design of the present utility model is: develop the anti-unloading device of a kind of anterior cervical plates nail system bone screw, adopt locking tabletting and steel plate to form the anti-unloading device of bone screw, solve the loosening easily problem that causes the internal fixation failure of anterior cervical plates nail system bone screw in the market.
To achieve these goals, the technical scheme that this utility model provides is: plate nail system bone screw anti-unloading device in the preceding road of novel cervical vertebra is made up of locking tabletting and steel plate, it is characterized in that: a circular groove is arranged on the steel plate, porose in the middle of groove, groove next door design simultaneously has two apertures, and these two apertures are circular-arc distribution with respect to the groove interstitial hole; Locking tabletting is triangular in shape, an end of triangle and steel plate contact surface design therein has spherical protuberances, design has the rectangular or quincunx hole of hexagonal in the middle of the locking tabletting, its spherical protuberances with respect to two apertures on interstitial hole distance and the steel plate relatively with steel plate groove centre bore apart from identical.
Locking tabletting and steel plate can assemble in factory earlier in advance, and in when assembling, the spherical protuberances on the locking tabletting falls within the aperture that departs from the steel plate center on the steel plate, closely contact between locking tabletting and the steel plate.
The beneficial effect that this utility model produced is: the anti-unloading device of anterior cervical plates nail system bone screw is reasonable in design, novel structure, uniqueness, and production and processing is simple, and clinical manipulation is very convenient, can significantly reduce the risk of operative failure.
Description of drawings:
Fig. 1 is this utility model structure and prepackage view.
Fig. 2 is this utility model structure and user mode sketch map.
Fig. 3 is this utility model structure and user mode A-A cutaway view.
Fig. 4 is a steel plate structure sketch map of the present utility model.
Fig. 5 is a locking tabletting sketch map of the present utility model.
The specific embodiment:
Below in conjunction with accompanying drawing this utility model is described further:
Shown in Fig. 1 ~ 3, the anti-unloading device of anterior cervical plates nail system bone screw is made up of locking tabletting and steel plate.Steel plate 1, according to clinical instructions for use, the steel plate length design has multiple length specification.
As shown in Figure 4, respectively there is a circular groove 11 at place, 4 holes, the left and right sides, and there is a hole 12 in groove 11 central authorities, and groove 11 next doors design simultaneously has two apertures 13, and these two apertures 13 are circular-arc distribution with respect to groove interstitial hole 12.Bone screw 3 screws in vertebral body from the hole 14 of steel plate 1, steel plate 1 is fixed on the cervical vertebral body.After bone screw 3 screwed in steel plate 1 fully, head was imbedded in the hole 14 of steel plate 1.
As shown in Figure 5, locking tabletting 2, triangular in shape, an end of triangle and steel plate contact surface design therein has spherical protuberances 21, design has the rectangular or quincunx hole 22 of hexagonal in the middle of the locking tabletting, its spherical protuberances with respect to two apertures 13 on interstitial hole 22 distances and the steel plate 1 relatively with steel plate groove centre bore 12 apart from identical.
The anti-unloading device operation principle of this utility model anterior cervical plates nail system bone screw is: locking tabletting 2 assembles in factory in advance with steel plate 1, when assembling, spherical protuberances 21 on the locking tabletting 2 falls within the aperture 13 that departs from steel plate 1 center on the steel plate 1, closely contact between locking tabletting 2 steel plates 1.During operation, because the triangular design of locking tabletting 2, abdicated the space of bone screw 3 screw-in steel plates 1, bone screw 3 is screwed in spinal vertebral one by one from steel plate 1 screw hole 14, steel plate 1 firmly is connected with vertebral body, use the special screwdriver brute force locking tabletting 2 that turns clockwise then, utilize the elasticity of locking tabletting 2, spherical protuberances 21 on the locking tabletting 2 is fallen on the steel plate 1 in another aperture 13, at this moment other two jiaos of triangle bone screw 3 heads are pushed down on the locking tabletting 2, finished anti-back kinetic energy each bone screw 3.
Claims (4)
1. the anti-unloading device of anterior cervical plates nail system bone screw is made up of locking tabletting and steel plate, it is characterized in that: a circular groove is arranged on the steel plate, and porose in the middle of the groove, the next door design has two apertures, and these two apertures are circular-arc distribution with respect to the groove interstitial hole.
2. anterior cervical plates nail system bone screw as claimed in claim 1 is prevented unloading device, it is characterized in that: described locking tabletting is triangular in shape, an end of triangle and steel plate contact surface design therein has spherical protuberances, and design has the rectangular or quincunx hole of hexagonal in the centre.
3. anterior cervical plates nail system bone screw as claimed in claim 1 or 2 is prevented unloading device, and it is characterized in that: the spherical protuberances on the described locking tabletting just in time falls within the aperture that departs from the steel plate center on the steel plate, closely contacts between locking tabletting and the steel plate.
4. anterior cervical plates nail system bone screw as claimed in claim 3 is prevented unloading device, it is characterized in that: after described locking tabletting rotated to an angle, the spherical protuberances on the locking tabletting can fall on the steel plate in another aperture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200726112U CN201088617Y (en) | 2007-07-19 | 2007-07-19 | Drop-prevention device of screw of anterior cervical plate system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200726112U CN201088617Y (en) | 2007-07-19 | 2007-07-19 | Drop-prevention device of screw of anterior cervical plate system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201088617Y true CN201088617Y (en) | 2008-07-23 |
Family
ID=39860372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200726112U Expired - Fee Related CN201088617Y (en) | 2007-07-19 | 2007-07-19 | Drop-prevention device of screw of anterior cervical plate system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201088617Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104758040A (en) * | 2015-04-30 | 2015-07-08 | 山东威高骨科材料股份有限公司 | Steel plate for anterior cervial internal fixation and guiding device |
-
2007
- 2007-07-19 CN CNU2007200726112U patent/CN201088617Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104758040A (en) * | 2015-04-30 | 2015-07-08 | 山东威高骨科材料股份有限公司 | Steel plate for anterior cervial internal fixation and guiding device |
| CN106137374A (en) * | 2015-04-30 | 2016-11-23 | 山东威高骨科材料股份有限公司 | Anterior cervical vertebrae internal fixation guider |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080723 Termination date: 20160719 |