CN206867271U - The split type pedicle screw assemblies of lower cervical anterior - Google Patents
The split type pedicle screw assemblies of lower cervical anterior Download PDFInfo
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- CN206867271U CN206867271U CN201720106566.1U CN201720106566U CN206867271U CN 206867271 U CN206867271 U CN 206867271U CN 201720106566 U CN201720106566 U CN 201720106566U CN 206867271 U CN206867271 U CN 206867271U
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- screw thread
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Abstract
The utility model discloses a kind of split type pedicle screw assemblies of lower cervical anterior, including screw and nut, screw is made up of rivet nut portion, nail neck and nail head, neck is followed closely by rivet nut portion and ailhead spaced-apart, rivet nut portion and nail head are the equal cylinder of diameter, the first external screw thread is provided with rivet nut portion, nail head is provided with the second external screw thread, and the inner hollow of nail head is formed with regular hexagon hole；The internal thread being adapted with the external screw thread of rivet nut portion first is provided with the endoporus of nut, the outer wall of nut is two-part ledge structure, and the top of nut outer wall is regular hexagon, and the bottom of nut outer wall is circle.The utility model is simple in construction, locking is reliable, clinical manipulation is very convenient, the different segment fixed according to patient can use the screw of different length and diameter, add the accuracy that pedicle screw is inserted, it will not be clashed again with putting for steel plate position, the patient of lower cervical anterior multi-segmental Subtotal vertebrectomy decompression reconstruction is needed suitable for treatment clinic.
Description
Technical field
The utility model belongs to medical apparatus technical field, and specifically, more particularly to a kind of lower cervical anterior is split type
Pedicle screw assemblies.
Background technology
Research for cervical vertebra internal fixation method, it has already been proven that the biomechanical stability fixed in pedicle screw is most
It is high.At present, Cervical vertebra (C3-C7) posterior Pedicle screw Internal fixation technology is accepted extensively by domestic and foreign scholars and is applied to face
Bed.
But clinically for needing the secondary full excision decompression of lower cervical anterior multi-segmental centrum and the patient rebuild, especially
It is the gerontal patient with Vertebral body and osteoporosis, with traditional preceding road centrum screw Plate internal fixiation, is unable to reach life
Material resources intensity requirement, generally require plus do fracture or dislocation operation, to increase its stability, so as to largely increase
The wound and operation risk of patient, and have the possibility for causing more complication to occur, and slow down patient's post-operative recovery.
Therefore, domestic and foreign scholars start to carry out the single anterior lateral cervical approach of Cervical vertebra, Pedicle screw pating Internal fixation technology
Research, finds the technology operation technique narrow space, easily loses spinal cord, vertebral artery or cervical nerve root, the key of operation is vertebra
The accurate of pedicle screw is inserted, but there is no professional and complete steel plate screw internal fixation system at present, all using common os integumentale screw
And anterior plate fixation so that operation technique is cumbersome, and screw and steel plate often influence each other, and can not all obtain satisfied position, and
, there is potential safety hazard, easily cause the loosening of screw, exit in screw and steel plate latch-up-free device, or even broken nail.
Utility model content
In view of the drawbacks described above of prior art, technical problem to be solved in the utility model is to provide a kind of Cervical vertebra
The preceding split type pedicle screw assemblies in road.
Technical solutions of the utility model are as follows：A kind of split type pedicle screw assemblies of lower cervical anterior, it is characterised in that：
Including screw and nut, wherein, the screw is made up of rivet nut portion, nail neck and nail head, and nail neck is disc structure, the nail
Neck is by rivet nut portion and ailhead spaced-apart, and the rivet nut portion and nail head are the equal cylinder of diameter, and the diameter in rivet nut portion
Less than the diameter of nail neck, the lower end in the rivet nut portion is cone, and the first external screw thread is provided with rivet nut portion, is set on nail head
There is the second external screw thread, the first externally threaded pitch is more than the second externally threaded pitch, and the first externally threaded depth of thread is big
In the second externally threaded depth of thread, the inner hollow of the nail head is formed with regular hexagon hole；In the endoporus of the nut
The internal thread being adapted with the external screw thread of rivet nut portion first is provided with, the outer wall of nut is two-part ledge structure, nut outer wall
Top is regular hexagon, and the bottom of nut outer wall is circle, and the nut can be sleeved on the nail head of screw, both screw threads
Coordinate.
Using above technical scheme, pedicle screw is first inserted in operation, and the rivet nut portion of screw penetrates centrum pedicle and reached
Centrum rear, nail neck are affixed on bone face, nail head in front of centrum and outside bone then screw corresponding to steel plate are linked into the nail of screw
Head, and be close to follow closely neck, then nut is torqued into nail head, steel plate and screw locking are integrated.The utility model is using only
Special hanging mounting means, so under conditions of ensureing that pedicle screw is accurately inserted, clinical manipulation is very simple and convenient, no
The fastness and reliability of installation are only able to ensure that, and the different segment fixed according to patient can use different length and diameter
Screw.The lower end in rivet nut portion is cone, plays a part of to be oriented to, rivet nut portion is penetrated centrum and be easier；In rivet nut portion
One external screw thread is relatively deep and wider, it can be ensured that is tightly combined with pedicle of vertebral arch；Nail head inner hollow can use chi into regular hexagon hole
The interior hexagonal bottle opener insertion of very little matching, by default pedicle of vertebral arch direction, it is torqued into screw clockwise, it is such simple operation, laborsaving；Nail
Head outer circular has screw thread, can installation dimension matching nut.To be circular threaded inside nut, with nail head screw thread
Match somebody with somebody, nail head can be torqued into；Upper strata is regular hexagon outside nut, and the Hexagonal jacket of useful size matching, which entangles, tightens nut, outside
Subordinate's layer is circle, and diameter is more than the regular hexagon on top, can increase the contact area of nut and steel plate, and steel plate and screw are locked
Tightly, it is affixed on bone face.
The screw and nut are made by titanium alloy, such light weight, intensity height and tissue biocompatibility
It is good.
In order to meet the requirement of skeleton engineering mechanics, first external screw thread is divided into two sections, on the first external screw thread
The pitch of section is 1.65-1.86mm, depth of thread 0.64-0.83mm；The pitch of first external screw thread hypomere is 1.34-
1.62mm, depth of thread 0.5-0.62mm.First external screw thread hypomere is predominantly located in narrow pedicle of vertebral arch after operation is inserted
Portion, optimum position are partial threads insertion pedicle of vertebral arch cortexs of bone, and narrow and shallow os integumentale screw Design of Screw Thread is advantageous to screw
The insertion with screw thread is inserted, screw is reached maximum biomechanical effect；First external screw thread epimere is main after operation is inserted
Inside roomy centrum, deep and wide cancellous bone screw Design of Screw Thread is advantageous to screw and cut inside centrum with bone trabecula
Cut and closely agree with, add the resisting pull out forces of the effective contact area and screw between screw thread and bone trabecula.First external screw thread
Upper-lower section combines, and screw is reached optimal biomethanics and preferable stress distribution, effectively can prevent screw from deviating from.
Preferably, the second externally threaded pitch is 0.5-0.65mm, depth of thread 0.25-0.33mm.
Beneficial effect：The utility model is inserted technology exclusively for the premenstrual road pedicle screw of Cervical vertebra and designed, and fills out
The blank that the art formula there is no professional and complete apparatus is mended.The utility model is simple in construction, and locking is reliable, and clinical manipulation is very square
Just, the different segment fixed according to patient can use the screw of different length and diameter, that is, add what pedicle screw was inserted
It accuracy, will not be clashed again with putting for steel plate position, need lower cervical anterior multi-segmental centrum suitable for treatment clinic
The patient that secondary full excision decompression is rebuild, particularly merge the gerontal patient of Vertebral body or severe osteoporosis.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the utility model one.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples：
As shown in figure 1, the utility model is made up of screw 1 and nut 2, both of which is preferably made up of titanium alloy.Wherein, spiral shell
Nail 1 is made up of rivet nut portion 11, nail neck 12 and nail head 13, and nail neck 12 is disc structure, and the nail neck 12 is by rivet nut portion 11
Separated with nail head 13.Rivet nut portion 11 and nail head 13 are the equal cylinder of diameter, and the diameter in rivet nut portion 11 is less than nail neck
The diameter in portion 12.The lower end in rivet nut portion 11 is cone, the first external screw thread 14 is provided with rivet nut portion 11, nail head 13 is provided with
Second external screw thread 15, the pitch of the first external screw thread 14 are more than the pitch of the second external screw thread 15, the depth of thread of the first external screw thread 14
More than the depth of thread of the second external screw thread 15.First external screw thread 14 divides is for two sections, the pitch of the epimere of the first external screw thread 14
1.65-1.86mm depth of thread 0.64-0.83mm；The pitch of the hypomere of first external screw thread 14 is 1.34-1.62mm, and screw thread is deep
Spend for 0.5-0.62mm.The pitch of second external screw thread 15 is 0.5-0.65mm, depth of thread 0.25-0.33mm.
As shown in figure 1, the inner hollow of nail head 13 is formed with regular hexagon hole 16.Be provided with the endoporus of nut 2 with
The internal thread 21 that the external screw thread 14 of rivet nut portion 11 first is adapted, the outer wall of nut 2 is two-part ledge structure, the outer wall of nut 2
Top is regular hexagon 22, and the bottom of the outer wall of nut 2 is circle 23, and nut 2 can be sleeved on the nail head 13 of screw 1, two
Person's screw thread coordinates.
Operation principle of the present utility model is as follows：
Pedicle screw 1 is first inserted in operation, and the rivet nut portion 11 of screw penetrates centrum pedicle and reaches centrum rear, follows closely neck
Then 13 are affixed on bone face, nail head 13 in front of centrum is linked into screw outside bone by screw corresponding to steel plate (being not drawn into figure)
Nail head 13, and be close to follow closely neck 12, then nut 2 is torqued into nail head 13, steel plate and screw locking are integrated.
Preferred embodiment of the present utility model described in detail above.It should be appreciated that the ordinary skill people of this area
Member makes many modifications and variations without creative work can according to design of the present utility model.Therefore, all this technology necks
Technical staff passes through logic analysis, reasoning or limited reality on the basis of existing technology according to design of the present utility model in domain
Available technical scheme is tested, all should be in the protection domain being defined in the patent claims.
Claims (4)
- A kind of 1. split type pedicle screw assemblies of lower cervical anterior, it is characterised in that：Including screw (1) and nut (2), its In, the screw (1) is made up of rivet nut portion (11), nail neck (12) and nail head (13), and nail neck (12) is disc structure, should Nail neck (12) separates rivet nut portion (11) and nail head (13), and the rivet nut portion (11) and nail head (13) are that diameter is equal Cylinder, and the diameter of rivet nut portion (11) is less than the diameter of nail neck (12), and the lower end of the rivet nut portion (11) is cone, Rivet nut portion (11) is provided with the first external screw thread (14), and nail head (13) is provided with the second external screw thread (15), first external screw thread (14) pitch is more than the pitch of the second external screw thread (15), and the depth of thread of the first external screw thread (14) is more than the second external screw thread (15) The depth of thread, the inner hollow of the nail head (13) is formed with regular hexagon hole (16)；Set in the endoporus of the nut (2) The internal thread (21) being adapted with the external screw thread (14) of rivet nut portion (11) first is equipped with, the outer wall of nut (2) is two-part Step-edge Junction Structure, the top of nut (2) outer wall are regular hexagon (22), and the bottom of nut (2) outer wall is circular (23), nut (2) energy Enough it is sleeved on the nail head (13) of screw (1), both screw threads coordinate.
- 2. the split type pedicle screw assemblies of lower cervical anterior as claimed in claim 1, it is characterised in that：The screw (1) It is made with nut (2) by titanium alloy.
- 3. the split type pedicle screw assemblies of lower cervical anterior as claimed in claim 1 or 2, it is characterised in that：Described first External screw thread (14) is divided into two sections, and the pitch of the first external screw thread (14) epimere is 1.65-1.86mm, depth of thread 0.64- 0.83mm；The pitch of the first external screw thread (14) hypomere is 1.34-1.62mm, depth of thread 0.5-0.62mm.
- 4. the split type pedicle screw assemblies of lower cervical anterior as claimed in claim 3, it is characterised in that：The second outer spiral shell The pitch of line (15) is 0.5-0.65mm, depth of thread 0.25-0.33mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720106566.1U CN206867271U (en) | 2017-01-13 | 2017-01-13 | The split type pedicle screw assemblies of lower cervical anterior |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720106566.1U CN206867271U (en) | 2017-01-13 | 2017-01-13 | The split type pedicle screw assemblies of lower cervical anterior |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206867271U true CN206867271U (en) | 2018-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720106566.1U Expired - Fee Related CN206867271U (en) | 2017-01-13 | 2017-01-13 | The split type pedicle screw assemblies of lower cervical anterior |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206867271U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110448372A (en) * | 2019-09-06 | 2019-11-15 | 北京爱康宜诚医疗器材有限公司 | Locking fastening structure and clamp device |
| CN114712001A (en) * | 2021-01-05 | 2022-07-08 | 上海仁杰实业有限公司 | Special fixture assembly for alveolar bone augmentation |
| CN115054357A (en) * | 2022-07-05 | 2022-09-16 | 西安市红会医院 | Novel posterior sacroiliac reduction fixator for orthopedics |
-
2017
- 2017-01-13 CN CN201720106566.1U patent/CN206867271U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110448372A (en) * | 2019-09-06 | 2019-11-15 | 北京爱康宜诚医疗器材有限公司 | Locking fastening structure and clamp device |
| CN114712001A (en) * | 2021-01-05 | 2022-07-08 | 上海仁杰实业有限公司 | Special fixture assembly for alveolar bone augmentation |
| CN115054357A (en) * | 2022-07-05 | 2022-09-16 | 西安市红会医院 | Novel posterior sacroiliac reduction fixator for orthopedics |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180112 Termination date: 20190113 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |