CN206995323U - Bony fusion pedicle screw for internal fixation of spine under the conditions of osteoporosis - Google Patents
Bony fusion pedicle screw for internal fixation of spine under the conditions of osteoporosis Download PDFInfo
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- CN206995323U CN206995323U CN201720025011.4U CN201720025011U CN206995323U CN 206995323 U CN206995323 U CN 206995323U CN 201720025011 U CN201720025011 U CN 201720025011U CN 206995323 U CN206995323 U CN 206995323U
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- rivet nut
- internal fixation
- osteoporosis
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Abstract
The utility model discloses a kind of bony fusion pedicle screw for internal fixation of spine under the conditions of osteoporosis, it is set to screw in centrum by rotating rivet nut, during rotation, planing mechanism surface trimming and can collect cancellous bone sclerotin, Grafting Cancellous Bone Bolt matter can enter in hollow pipeline via duct wall side opening, Gegenbaur's cell in the cancellous bone sclerotin differentiation and proliferation in the presence of bone material is facilitated forms new bone, and/or reduce osteoclast activity in the presence of osteoclastic activity inhibiting substances, strengthen osteogenic action, new bone is finally formed in hollow pipeline, " screw area of new bone " overall structure is formed with screw, increase the hold of screw, so as to improve the resistance to overturning of spinal internal fixation system, improve postoperative success rate.
Description
Technical field
The utility model belongs to medical equipment technical field, is related to a kind of for internal fixation of spine under the conditions of osteoporosis
Bony fusion pedicle screw.
Background technology
Internal fixation of spine operation is the common method of current clinical treatment spinal instability caused by the post of backbone three is unbalance.Vertebra
Pedicle screw is the important component of spinal internal fixation system, and guarantee is implanted directly into the strong fixation of centrum inner bolt, is to realize
The premise of whole spinal internal fixation system stability, can be only achieved the effect of clinical treatment.However, the increasing with elderly population
Add, tumour, inflammation and metabolic disease, often result in the rely vertebral cancellous bone trabecular bone structure of strong holding of screw and degenerate, bone
Matter density is reduced, and long-time stability are difficult to ensure that after screw placement, and the possibility increase of screw loosening, surgical effect at a specified future date is failed to understand
Really.
At present there is the method for screw stability under the conditions of clinical conventional raising osteoporosis：Change screw own specifications,
Including increase screw diameter and increase screw length to increase screw hold；Polymethyl methacrylate (PMMA) bone cement is followed closely
Road is strengthened, and improves screw way quality；Screw surface is modified, including is facilitated bone material coating and improved Gegenbaur's cell affinity metal and apply
Layer, strengthen screw-synosteosis power；Improve solid in screw inner fixing device, including increase hook plate and horizontal even device etc. auxiliary raising
Determine the stability of a system.The above method can improve the stability of internal fixation system to a certain extent, but still suffer from it is more deficiency with
Defect, such as increase screw diameter so that during screw is screwed into centrum by pedicle of vertebral arch, the possibility that pedicle of vertebral arch destroys increases
Add；Increase screw length causes the possibility increase that big blood vessel is destroyed in front of backbone；PMMA bone cement is strong
When changing screw way, polymethyl methacrylate, which produces local high fever, an injured nerve, and PMMA dosages are uncontrollable and have compressing during seepage
Nerve, the risk of pulmonary embolism is caused when serious, and the secondary revision procedure effect of screw way strengthened is imprecise；Facilitate bone coating in spiral shell
Nail is when being screwed into centrum, coating shedding, and therapeutic effect is imprecise；It is cumbersome in servicing unit art, extend operating time etc..
The content of the invention
In view of the above-mentioned drawbacks of the prior art or deficiency, the purpose of this utility model are, there is provided one kind is used for bone
The bony fusion pedicle screw of internal fixation of spine under the conditions of matter is loose, it can improve the stability of spinal internal fixation system,
Improve clinical therapeutic efficacy.
In order to realize above-mentioned task, technical scheme is used by the utility model：
For the bony fusion pedicle screw of internal fixation of spine under the conditions of osteoporosis, including rivet nut, in the rivet nut
It is provided with external screw thread；Axis is provided with hollow pipeline inside rivet nut, is placed with hollow pipeline and facilitates bone material and/or suppression
Osteoclastic material；Multiple planing mechanisms are additionally provided with the rivet nut；Multiple duct wall side openings are provided with the side wall of hollow pipeline,
Connected between planing mechanism and hollow pipeline by duct wall side opening.
Specifically, the planing mechanism includes arched member, and arched member is located on the outer wall of the rivet nut, opened up on arched member
There is a sword sample opening；Described duct wall side opening is set on the outer wall of the rivet nut of arched member covering.
Further, the outer wall of the sword sample opening and the rivet nut is tangential on a bit, is point of contact, is put down where sword sample opening
Corner dimension between face and the vertical plane for crossing point of contact is 10 ° -30 °.
Further, arc groove, the groove of arc groove are additionally provided with the outer wall of the rivet nut by arched member covering
Duct wall side opening described in mouth face, arc groove connect with duct wall side opening.
Further, the radian size of the arc groove is 40 ° -70 °.
Further, multiple block pieces are provided with the rivet nut inwall, block piece is arranged on the duct wall side opening
On a lateral edges of the rivet nut tail end.
Specifically, the block piece is the semicircular configuration to match with the edge radian of the duct wall side opening.
Further, the tail end of the rivet nut is installed with base.
Compared with prior art, the utility model has following technique effect：
1st, bony fusion pedicle screw of the present utility model makes it screw in centrum by rotating rivet nut, in the mistake of rotation
Cheng Zhong, planing mechanism surface trimming and can collect cancellous bone sclerotin, during Grafting Cancellous Bone Bolt matter can enter via duct wall side opening
In vacant duct, Gegenbaur's cell in the cancellous bone sclerotin differentiation and proliferation in the presence of bone material is facilitated forms new bone, and/or broken
Osteoclast activity is reduced in the presence of bone active inhibiting substances, strengthens osteogenic action, is finally formed in hollow pipeline new
Bone, " screw-area of new bone " overall structure is formed with screw, increases the hold of screw, so as to improve spinal internal fixation system
Resistance to overturning, improve postoperative success rate.
2nd, planing mechanism of the present utility model, it can cut during rivet nut screws in centrum and collect sclerotin, really
Protecting has the Gegenbaur's cell for forming " screw-area of new bone " structure in screw hollow pipeline.
3rd, arc groove of the present utility model can accommodate the cancellous bone sclerotin after being cut by planing mechanism to a greater degree,
Enable to cancellous bone sclerotin to pass through duct wall side opening simultaneously to enter in hollow pipeline, so as to avoid 90 ° of right-angle structures from setting
" dead space " volume existing for meter and cause sclerotin in local accumulation.
4th, block piece of the present utility model causes the cancellous bone sclerotin that cutting is collected uniformly to be distributed in hollow pipeline, protects
The overall structure that area of new bone forms uniformity with screw is demonstrate,proved, so as to ensure the mechanical stability of bony fusion pedicle screw.
Brief description of the drawings
Fig. 1 is overall schematic of the present utility model；
Fig. 2 is of the present utility model profile of the cutting plane without planing mechanism；
Fig. 3 is of the present utility model profile of the cutting plane by planing mechanism；
Fig. 4 is the schematic diagram of planing mechanism；
Each label implication in figure：1-rivet nut, 2-external screw thread, 3-hollow pipeline, 4-planing mechanism, 401-arch
Part, 402-sword sample opening, 5-duct wall side opening, 6-point of contact, 7-block piece, 8-opening, 9-base.
Explanation and illustration in further detail is made to scheme of the present utility model below in conjunction with the drawings and specific embodiments.
Embodiment
Bony fusion pedicle screw of the present utility model for internal fixation of spine under the conditions of osteoporosis, including rivet nut
1, external screw thread 2 is provided with the rivet nut 1；Axis is provided with hollow pipeline 3 inside rivet nut 1, rush has been prevented in hollow pipeline 3
Osteogenic protein and/or the osteoclastic material of suppression；Multiple planing mechanisms 4 are additionally provided with rivet nut 1；Set in the side wall of hollow pipeline 3
There are multiple duct wall side openings 5, connected between mechanism 4 of planing and hollow pipeline 3 by duct wall side opening 5.
Bony fusion pedicle screw of the present utility model makes it screw in centrum by rotating rivet nut 1, in the mistake of rotation
Cheng Zhong, planing mechanism 4 surface trimming and can collect cancellous bone sclerotin, and Grafting Cancellous Bone Bolt matter can enter via duct wall side opening 5
In hollow pipeline 3, Gegenbaur's cell in the cancellous bone sclerotin differentiation and proliferation in the presence of bone material is facilitated forms new bone, and/or
Osteoclast activity is reduced in the presence of osteoclastic activity inhibiting substances, strengthens osteogenic action, finally the shape in hollow pipeline 3
Into new bone, " screw-area of new bone " overall structure is formed with screw, increases the hold of screw, so as to improve internal fixation of spine system
The resistance to overturning of system, improve postoperative success rate.
Wherein, facilitating bone material and suppressing osteoclastic material in hollow pipeline 3 can be deposited in the form of single or mixing
；Bone material is facilitated to include hydroxyapatite, calcium sulfate, calcium phosphate, bioactivity glass, strontium salt etc., and with single or mixing
Form is present；Pressing down osteoclastic material includes Diphosphonate, calcitonin etc. and exists with single or mixed form.
Specifically, planing mechanism 4 of the present utility model can realize the surface trimming and collecting function of cancellous bone sclerotin, its
Including arched member 401, arched member 401 is installed on the outer wall of rivet nut 1, and a sword sample opening 402 is offered on arched member 401；
Described duct wall side opening 5 is set on the outer wall for the rivet nut 1 that arched member 401 covers.Arched member 401 is arranged on external screw thread 2
In thread pitch, the length direction of arched member 401 is consistent with the hand of spiral of external screw thread 2；Rivet nut 1 is screwing in Intrapyramidal process
In, sword sample opening 402 realizes the surface trimming of cancellous bone sclerotin, and the cancellous bone sclerotin after cutting is entered by sword sample opening 402 to encircle
Inside shape part 401, play a part of collecting sclerotin, the sclerotin being collected into enters in hollow pipeline 3, there is provided form screw-bone and melt
Close the Gegenbaur's cell of mechanism.
Because the height of the bone density of gerontal patient centrum is different, cause sclerotin intensity different, in order to ensure sword sample opening 402
Cutting effect, while avoid the excess destruction to original bony structures, the utility model further counter blade sample opening 402
Angle is designed.The outer wall of the sword sample opening 402 and the rivet nut 1 is tangential on a bit, is point of contact 6, sword sample opening 402
Corner dimension between place plane and the vertical plane for crossing point of contact 6 is 10 ° -30 °.According to the height of gerontal patient's centrum bone density
It is low, Low BMD, osteoporosis and serious osteoporosis can be divided into, sclerotin intensity is higher, and above-mentioned angle setting is bigger, if
Low BMD, then above-mentioned angle be arranged to 30 °, if osteoporosis, then above-mentioned angle is arranged to 20 °, is dredged if serious sclerotin
Loose disease, then above-mentioned angle be arranged to 10 °；The angle of sword sample opening 402 can be adjusted within the above range according to sclerotin condition,
Both it can guarantee that sword sample opening 402 can have enough intensity to resist when sclerotin intensity is of a relatively high and cut sclerotin, while again
Can ensure when sclerotin intensity is relatively low, by the angle for reducing sword sample opening 402 so that sword sample opening 402 it is sharp
While degree can successfully cut sclerotin, will not because sharpness deficiency and the original bony structures of excess destruction.
In addition, arched member 401 is natural continuity of the sword sample opening 402 along hand of spiral, its height can be given according to screw thread
The difference of the part depth and float design, its height are different and different according to sclerotin intensity, sclerotin intensity is lower, arched member 401
Height it is higher, it is intended that lower in sclerotin intensity, i.e., when bone amount is lower, by the increase of the volume of arched member 401,
Collect enough sclerotin, there is provided the required Gegenbaur's cell of enough screws-bone fusion structure.
Further, it is described by arched member in order to accommodate the cancellous bone sclerotin after being cut by planing mechanism 4 to a greater degree
Arc groove, the duct wall side opening 5 described in the notch face of arc groove, arc are additionally provided with the outer wall of the rivet nut 1 of 401 coverings
Connected in star connects with duct wall side opening 5, and the notch of arc groove refers to the side that arc groove connects with duct wall side opening 5.
Cancellous bone sclerotin can be accommodated in arc groove, so as to increase the volume that planing mechanism 4 accommodates cancellous bone sclerotin.Meanwhile arc
The arcuate structure of groove is designed to ensure that cancellous bone sclerotin passes through duct wall side opening 5 and entered in hollow pipeline 3, so as to
Avoid " dead space " volume existing for 90 ° of right angle groove structures and cause sclerotin in local accumulation.
Alternatively, the radian size of the arc groove is 40 ° -70 °, it is preferable that the radian size of arc groove is
60°.When sclerotin intensity is higher, trabecular bone structure is complete, when planing mechanism can collect more sclerotin, the radian of arc groove
Can slightly it reduce, ensureing the bottom land of arc groove gentle transition and can extend to duct wall side opening 5；When sclerotin intensity is relatively low,
Trabecular bone structure is sparse, when planing mechanism 4 collection sclerotin is less, can increase radian, increase between arched member 401 and arc groove
Volume, increased by volume, make enter planing mechanism 4 sclerotin increase, so that it is guaranteed that planing mechanism 4 can pass through duct wall
Side opening 5 inputs " seed " cancellous bone for skeletonization of sufficient amount into hollow pipeline 3.
The cancellous bone sclerotin entered via duct wall side opening 5 in hollow pipeline 3, the meeting during rivet nut 1 screws in centrum
Moved to the tail end of rivet nut 1, in order to avoid the excessive tail end to rivet nut 1 of cancellous bone sclerotin moves, the utility model is further
Ground sets multiple block pieces 7 on the inwall of rivet nut 1, and block piece 7 is arranged on the close tail of rivet nut 1 of the duct wall side opening 5
On one lateral edges at end so that the cancellous bone sclerotin for cutting collection is uniformly distributed in hollow pipeline 3, ensures area of new bone and spiral shell
Nail forms the overall structure of uniformity, so as to ensure the mechanical stability of bony fusion pedicle screw.
Specifically, the block piece 7 is the semicircular configuration to match with the edge radian of the duct wall side opening 5.Half
Loop configuration can stop that cancellous bone sclerotin excessively moves to the tail end of rivet nut 1.
Further, the top of the rivet nut 1 is provided with an opening 8.Opening 8 connects with hollow pipeline 3, and it sets mesh
Be hollow pipeline 3 is connected with centrum internal environment, Intrapyramidal blood and nutriment can enter hollow pipeline 3 in,
The sclerotin for ensureing to collect in hollow pipeline 3 has sufficient blood supply and battalion in the presence of facilitating bone material and suppressing osteoclastic material
Material is supported to promote into Bone m etabolism.Meanwhile ensure that area of new bone can be blended with original centrum sclerotin as overall structure, enhancing screw
Stability, realize the purpose of bony fusion screw.
Further, the tail end of the rivet nut 1 is installed with base 9, and rivet nut 1 screws in centrum and provides spinal internal fixation system heavily fortified point
It is strong to hold, and spinal stability can be recovered by the connection of base 9 stud.
Bony fusion pedicle screw of the present utility model for internal fixation of spine under the conditions of osteoporosis, in operation
Using when, screw way prepare it is complete it is safe after, during putting nail, rivet nut 1 is screwed in centrum, mechanism 4 of planing surface trimming centrum
Interior cancellous bone sclerotin, and promote and store to arched member 401, then it is distributed by duct wall side opening 5 into hollow pipeline 3, in pine
During matter bone is distributed from trend rivet nut 1, block piece 7 can be with secondary retention part cancellous bone sclerotin excessively to the tail of rivet nut 1
End distribution so that cutting collect cancellous bone be uniformly distributed in hollow pipeline 3, while with facilitate bone material and/or
Press down osteoclastic matter interaction, the new bone of generation, ultimately forms " screw-area of new bone " monolithic stability structure, from root in rivet nut 1
Spinal internal fixation system stability is improved in sheet, improves the clinical therapeutic efficacy of internal fixation of spine operation.Made simultaneously according to screw
With sufferers of osteoporosis face bone amount feature and sex difference, bone metabolism difference, bone material and/or the osteoclastic material of suppression is facilitated to merge
Single and/or mixing different distributions mode body in system can provide individuation screw operational version for patient.
Claims (8)
1. exist for the bony fusion pedicle screw of internal fixation of spine under the conditions of osteoporosis, including rivet nut (1), its feature
In being provided with external screw thread (2) on the rivet nut (1)；Rivet nut (1) is internal to be provided with hollow pipeline (3), hollow pipeline along axis
(3) it is placed with and facilitates bone material and/or the osteoclastic material of suppression；Multiple planing mechanisms (4) are additionally provided with the rivet nut (1)；
Multiple duct wall side openings (5) are provided with the side wall of hollow pipeline (3), pass through pipe between planing mechanism (4) and hollow pipeline (3)
Road wall side opening (5) connects.
2. being used for the bony fusion pedicle screw of internal fixation of spine under the conditions of osteoporosis as claimed in claim 1, it is special
Sign is that the planing mechanism (4) includes arched member (401), and arched member (401) is installed on the outer wall of the rivet nut (1), arch
A sword sample opening (402) is offered on shape part (401)；Described in being set on the outer wall of the rivet nut (1) of arched member (401) covering
Duct wall side opening (5).
3. being used for the bony fusion pedicle screw of internal fixation of spine under the conditions of osteoporosis as claimed in claim 2, it is special
Sign is that the sword sample opening (402) and the outer wall of the rivet nut (1) are tangential on a bit, are point of contact (6), sword sample opening (402)
Corner dimension between place plane and the vertical plane for crossing point of contact (6) is 10 ° -30 °.
4. being used for the bony fusion pedicle screw of internal fixation of spine under the conditions of osteoporosis as claimed in claim 2, it is special
Sign is, arc groove, the notch of arc groove are additionally provided with the outer wall of the rivet nut (1) by arched member (401) covering
Duct wall side opening (5) described in face, arc groove connect with duct wall side opening (5).
5. being used for the bony fusion pedicle screw of internal fixation of spine under the conditions of osteoporosis as claimed in claim 4, it is special
Sign is that the radian size of the arc groove is 40 ° -70 °.
6. being used for the bony fusion pedicle screw of internal fixation of spine under the conditions of osteoporosis as claimed in claim 1, it is special
Sign is, multiple block pieces (7) are provided with rivet nut (1) inwall, and block piece (7) is arranged on the duct wall side opening (5)
Close rivet nut (1) tail end a lateral edges on.
7. being used for the bony fusion pedicle screw of internal fixation of spine under the conditions of osteoporosis as claimed in claim 6, it is special
Sign is that the block piece (7) is the semicircular configuration to match with the edge radian of the duct wall side opening (5).
8. being used for the bony fusion pedicle screw of internal fixation of spine under the conditions of osteoporosis as claimed in claim 1, it is special
Sign is that the tail end of the rivet nut (1) is installed with base (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720025011.4U CN206995323U (en) | 2017-01-10 | 2017-01-10 | Bony fusion pedicle screw for internal fixation of spine under the conditions of osteoporosis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720025011.4U CN206995323U (en) | 2017-01-10 | 2017-01-10 | Bony fusion pedicle screw for internal fixation of spine under the conditions of osteoporosis |
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| Publication Number | Publication Date |
|---|---|
| CN206995323U true CN206995323U (en) | 2018-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720025011.4U Active CN206995323U (en) | 2017-01-10 | 2017-01-10 | Bony fusion pedicle screw for internal fixation of spine under the conditions of osteoporosis |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106691564A (en) * | 2017-01-10 | 2017-05-24 | 中国人民解放军第四五四医院 | Bone fusion pedicle screw for internal fixation of spine for osteoporosis condition |
| CN109124752A (en) * | 2018-09-14 | 2019-01-04 | 创辉医疗器械江苏有限公司 | A kind of vertebral column minimally invasive Cement fixation device assembly |
| CN110680566A (en) * | 2019-10-31 | 2020-01-14 | 北京爱康宜诚医疗器材有限公司 | Bone filling prosthesis |
-
2017
- 2017-01-10 CN CN201720025011.4U patent/CN206995323U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106691564A (en) * | 2017-01-10 | 2017-05-24 | 中国人民解放军第四五四医院 | Bone fusion pedicle screw for internal fixation of spine for osteoporosis condition |
| CN106691564B (en) * | 2017-01-10 | 2023-09-08 | 中国人民解放军第四五四医院 | Bone fusion pedicle screw for internal fixation of spine under osteoporosis condition |
| CN109124752A (en) * | 2018-09-14 | 2019-01-04 | 创辉医疗器械江苏有限公司 | A kind of vertebral column minimally invasive Cement fixation device assembly |
| CN110680566A (en) * | 2019-10-31 | 2020-01-14 | 北京爱康宜诚医疗器材有限公司 | Bone filling prosthesis |
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