CN109171932A - A kind of screw steel plate system for being fixed in posterior approach for axis - Google Patents
A kind of screw steel plate system for being fixed in posterior approach for axis Download PDFInfo
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- CN109171932A CN109171932A CN201811183980.8A CN201811183980A CN109171932A CN 109171932 A CN109171932 A CN 109171932A CN 201811183980 A CN201811183980 A CN 201811183980A CN 109171932 A CN109171932 A CN 109171932A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 41
- 239000010959 steel Substances 0.000 title claims abstract description 41
- 238000013459 approach Methods 0.000 title claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 118
- 230000008569 process Effects 0.000 claims abstract description 115
- 210000003484 anatomy Anatomy 0.000 claims abstract description 16
- 238000003780 insertion Methods 0.000 claims abstract description 10
- 230000037431 insertion Effects 0.000 claims abstract description 10
- 230000007704 transition Effects 0.000 claims description 3
- 210000002385 vertebral artery Anatomy 0.000 abstract description 10
- 210000000278 spinal cord Anatomy 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001356 surgical procedure Methods 0.000 description 3
- 210000003748 coronary sinus Anatomy 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002980 postoperative effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 206010003162 Arterial injury Diseases 0.000 description 1
- 241000988174 Erebia gorge Species 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
Classifications
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- 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
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/8004—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with means for distracting or compressing the bone or bones
-
- 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
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/8033—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers
-
- 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
-
- 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
- A61B17/864—Pins or screws or threaded wires; nuts therefor hollow, e.g. with socket or cannulated
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The present invention relates to a kind of for screw steel plate system fixed in posterior approach for axis, including spinous process screw, isthmus screw and spinous process steel plate, the spinous process steel plate includes head and the first shoulder and the second shoulder for being separately positioned on the both sides of the head, the anatomical structure on the head and spinous process tip matches, first shoulder matches respectively with the spinous process side of spinous process tip side and vertebral plate, and the second shoulder matches respectively with the spinous process side of the spinous process tip other side and push plate, above-mentioned head offers the first through hole for the insertion of above-mentioned spinous process screw, and the first through hole for the insertion of isthmus screw is offered on the first shoulder and the second shoulder respectively.The corresponding position for the spinous process of axis that the present invention can enable the spinous process steel plate be firmly secured to, and spinous process screw can be avoided to be placed in canalis spinalis completely, a possibility that invading spinal cord is farthest reduced, is furthermore avoided that isthmus screw invades vertebral artery.
Description
Technical field
The present invention relates to medical instruments field more particularly to a kind of screw steel plate systems for fixing in posterior approach for axis.
Background technique
Currently, clinically used dentata technique for fixing includes through C1-2 joint screw, axis arch root screw and vertebral plate spiral shell
Nail, the above technology have the risk of damage vertebral artery.Wherein, since screw wears four layers of cortex bone fixation of articulatio atlantoepistrophica,
Margerl coronary sinus retroperfusion provides strong fixation, but coronary sinus retroperfusion has very high technical requirements and vertebra
The risk of arterial injury.Pedicle screw equally has higher technical requirements, angle, diameter, vertebral artery and the transverse process of pedicle of vertebral arch
There may be variations for the position in hole, and good screw screw way must avoid canalis spinalis and foramen transversarium, in some cases, due to dentata
Pedicle of vertebral arch is too small or the vertebral artery position anatomical factors such as interior, " high position rides " partially, possibility should not use axis arch root screw solid
It is fixed.Dentata Translaminar screw is fixed to be also applied to clinic, but to have axis laminar screw arranging to enter canalis spinalis concurrent by Jea etc. and Wang
The report that disease occurs.
Dentata anatomical structure is unique, and spinous process is maximum in cervical vertebra, the average width of part basal part in research CT measurement spinous process
Degree is (20.7 ± 1.3) mm, this, can be clinically as a kind of new pivot to provide possibility through the fixation of spinous process of axis screw
Vertebra Posterior fixation method supplement uses.Since spinous process screw is located at the rear structure of C2, screw way avoids foramen transversarium completely, so this
Technology is almost without the risk of vertebral artery injuries, however it is exactly screw that spinous process of axis screw, which fixes a clearly disadvantageous place,
Veutro cortex may be broken through and enter canalis spinalis infringement neck marrow, this technical risk of spinous process of axis screw limits this technology in clinic
It is universal.
Summary of the invention
It is a kind of safe and reliable for after dentata the technical problem to be solved by the present invention is to be provided for the prior art
Fixed screw steel plate system in road.
The technical scheme of the invention to solve the technical problem is: a kind of for screw fixed in posterior approach for axis
Steel plate system, which is characterized in that including spinous process screw, isthmus screw and spinous process steel plate, which includes head and divide
The first shoulder and the second shoulder of the both sides of the head are not set, the anatomical structure on the head and spinous process tip matches, the
One shoulder matches respectively with the spinous process side of spinous process tip side and vertebral plate, and the spine of the second shoulder and the spinous process tip other side
Prominent side and push plate match respectively, and above-mentioned head offers the first through hole for the insertion of above-mentioned spinous process screw, and the first shoulder
With the first through hole for the insertion of isthmus screw is offered on the second shoulder respectively, under use state, from dentata cross section as it can be seen that on
It is opposite with the top middle portion of spinous process tip to state first through hole, spinous process screw is vertically inserted into spinous process tip, and above-mentioned each second through-hole
Respectively with the C of respective side2/C3The top of zygapophysial joint is opposite, and the angle of the central axes of each isthmus screw and vertical direction point
It Wei not be 25 °~30 °.
For improve the present invention in spinous process steel plate applicability, make it is suitable for more with different spinous process of axis forms
Body, each shoulder include the first plate body to match with the anatomical structure of spinous process side and the anatomical structure with push plate
The second plate body to match, and angle formed by plane where the first plate body and the second plate body place plane is in each shoulder
125 °~135 °.
To reduce the cuing open from range of spinous process steel plate and spinous process side and vertebral plate, enable the first plate body and the second plate body more preferably
Ground is attached respectively on spinous process side and vertebral plate, and first plate body is bonded spinous process side and vertebral plate with the intersection of the second plate body
Intersection and in smooth transition.
Vertebral artery, second through-hole and C are invaded to further avoid isthmus screw2/C3The top 5mm of zygapophysial joint
Place is opposite, i.e., the entry point of isthmus screw is in C2/C3The top 5mm of zygapophysial joint, in this way during isthmus screw enters
It can be farthest avoided to invade vertebral artery.
To enable the spinous process steel plate in the present invention more accurately to attach at the knochenbruch face of dentata, so as to make screw steel
Plate system can fixation fracture strongerly, each shoulder and the junction of cephalic par respectively with corresponding spinous process side and spine
The anatomical structure of the intersection of prominent tip matches.
Screw steel plate system in surgical procedure in the present invention needs to be combined with other surgical instruments, for convenience of using, respectively
The spinous process screw and isthmus screw include head and the bar portion for connecting with other operation tools.
Preferably, the diameter of the bar portion of each spinous process screw and isthmus screw is 3.5mm~4.0mm, further,
The length of the bar portion of spinous process screw is 22mm~24mm, and the length of the bar portion of the isthmus screw is 16mm~18mm, so as to
Guarantee the entrance depth of spinous process screw and isthmus screw centainly.
Preferably, the first through hole and the second through-hole are locking made of being overlapped as pressurization hole slot and threaded bore portion
Pressurization hole increases the flexibility fixed in art, promotes treatment effect so as to carry out preferably fixed to knochenbruch face and/or pressurize
Fruit is conducive to post-operative recovery.
Further, it is preferable that the central axis of the threaded bore portion of the first through hole is vertical with plane where the first plate body, respectively
Plane angulation where the central axis of the threaded bore portion of second through-hole and the second plate body is 65 °~70 °.
Compared with the prior art, the advantages of the present invention are as follows: the anatomical structure on head and spinous process tip matches, and first
The anatomical structure of shoulder and the second shoulder respectively with the spinous process side of two sides and push plate matches, and confession is offered on head
The first through hole of spinous process screw insertion, the second through-hole for the insertion of isthmus screw is offered on each shoulder, so as to make the spinous process
The corresponding position for the spinous process of axis that steel plate can be firmly secured to.Meanwhile under use state, from dentata cross section as it can be seen that above-mentioned
One through-hole is opposite with the top middle portion of spinous process tip, and spinous process screw is vertically inserted into spinous process tip, since spinous process tip has centainly
Thickness, the middle part insertion along spinous process tip can avoid spinous process screw to be placed in canalis spinalis completely, farthest reduce and invade spinal cord
Possibility, while each second through-hole and C2/C3The top of zygapophysial joint is opposite, and the central axes of isthmus screw and vertical direction
Angle be 25 °~30 °, thus be avoided that isthmus screw invade vertebral artery.As it can be seen that the screw steel plate system in the present invention is steady
On the basis of fixed bit spinous process of axis fracture, the infringement to dentata normal function can be effectively avoided, to effectively improve operation
The safety and reliability of process.
Detailed description of the invention
Fig. 1 is the dentata schematic cross-sectional view in the embodiment of the present invention under screw steel plate system use state；
Fig. 2 is the structural schematic diagram of screw in the embodiment of the present invention.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
As illustrated in fig. 1 and 2, a kind of for screw steel plate system fixed in posterior approach for axis, including spinous process screw 51, isthmus
Both screw 52 and spinous process steel plate 3, the central axes of spinous process screw 51 and each isthmus screw 52 are respectively adopted in Fig. 1 to indicate
Position is set.Above-mentioned spinous process steel plate 3 includes cephalic par 31 and the first shoulder 32 for being separately positioned on 31 two sides of cephalic par and the
Two shoulders 33, the cephalic par 31 and the anatomical structure of spinous process tip match, the spine of the first shoulder 32 and spinous process tip side
Prominent side and vertebral plate match respectively.To enable the spinous process steel plate 3 in the present invention more accurately to attach in the knochenbruch face of dentata
Place, so as to enable screw steel plate system fixed fracture strongerly, the connection of each above-mentioned shoulder and cephalic par 31 is punished
Do not match with corresponding spinous process side and the anatomical structure of the intersection of spinous process tip.
Each above-mentioned shoulder includes the first plate body 301 to match with the anatomical structure of spinous process side and the solution with push plate
It cuts open and learns the second plate body 302 that structure matches.For the applicability for improving spinous process steel plate 3 in the present invention, make that it is suitable for more having
Have the individual of different spinous process of axis forms, in each shoulder 301 place plane of the first plate body and 302 place plane institute of the second plate body at
Angle α be 125 °~135 °, in addition, to reduce the cuing open from range of spinous process steel plate 3 and spinous process side and vertebral plate, so that each shoulder
In the first plate body 301 and the second plate body 302 can preferably attach respectively on corresponding spinous process side and vertebral plate, above-mentioned first
Plate body 301 is bonded the intersection of spinous process side and vertebral plate with the intersection of the second plate body 302 and is in smooth transition.Preferably, originally
In embodiment, spinous process steel plate 3 is integrated, and so as to keep 3 internal structure of spinous process steel plate firm, then more preferably can firmly be fixed
The corresponding position of spinous process.
Further, the first through hole 41 being inserted into for spinous process screw 51 is offered on above-mentioned cephalic par 31, and is divided on each shoulder
The second through-hole 42 being inserted into for isthmus screw 52 is not offered, i.e., above-mentioned first through hole 41 is one, and the second through-hole 42 is two
A, each through-hole is locking compress hole made of being overlapped as pressurization hole slot and threaded bore portion, preferable so as to carry out to knochenbruch face
Fixation and/or pressurization, increase flexibility fixed in art, promote therapeutic effect, be conducive to post-operative recovery.Further, above-mentioned
The central axis of the threaded bore portion of first through hole 41 is vertical with 301 place plane of the first plate body, the screw hole of each above-mentioned second through-hole 42
Partial central axis and 302 place plane angulation ε of the second plate body be 65 °~70 ° so that spinous process screw 51 into
Follow closely direction it is vertical with horizontal direction, isthmus screw 52 into nail direction and vertical direction angle δ be 25 °~30 ° (the present embodiment
In preferably 30 °).
Specifically, in a state of use, from dentata cross section as it can be seen that above-mentioned first through hole 41 and the top with spinous process tip
Middle part is opposite (i.e. the entry point of spinous process screw 51 be spinous process tip top middle portion), and the central axes of spinous process screw 51 are along vertical side
To extension, i.e. spinous process screw 51 is vertically inserted into spinous process tip, above-mentioned second through-hole 42 and C2/C3Top (the i.e. gorge of zygapophysial joint
Screw 52 entry point in portion's is C2/C3The top of zygapophysial joint) relatively, and the folder of the central axes of isthmus screw 52 and vertical direction
Angle δ is 25 °~30 ° (being preferably 30 ° in the present embodiment).
The anatomical structure on head and spinous process tip matches in the present invention in this way, the first shoulder 32 and the second shoulder 33
The anatomical structure with the spinous process side of two sides and push plate matches respectively, and offers on head and insert for spinous process screw 51
The first through hole 41 entered offers the second through-hole 42 being inserted into for isthmus screw 52 on each shoulder, so as to make the spinous process steel plate 3
The corresponding position for the spinous process of axis that can be firmly secured to.Meanwhile under use state, from dentata cross section as it can be seen that above-mentioned first is logical
Hole 41 is opposite with the top middle portion of spinous process tip, and spinous process screw 51 is vertically inserted into spinous process tip, since spinous process tip has centainly
Thickness, the middle part insertion along spinous process tip can avoid spinous process screw 51 to be placed in canalis spinalis completely, farthest reduce and invade spinal cord 1
A possibility that, while each second through-hole 42 and C2/C3The top of zygapophysial joint is opposite, and central axes of isthmus screw 52 and perpendicular
Histogram to angle be 25 °~30 °, thus be avoided that isthmus screw 52 invade vertebral artery 1.As it can be seen that the screw steel in the present invention
Plate system can effectively avoid the infringement to dentata normal function, to have on the basis of strong fix spinous process of axis fracture
Effect improves the safety and reliability of surgical procedure.
Preferably, each second through-hole 42 is and C2/C3It is at the top 5mm of zygapophysial joint opposite, i.e. isthmus screw 52
Entry point is in C2/C3The top 5mm of zygapophysial joint can be avoided farthest during isthmus screw 52 enters in this way
It invades vertebral artery 1.
In the present embodiment, above-mentioned spinous process screw 51 and isthmus screw 52 include the head for connecting with other surgical instruments
Portion and bar portion, so that screw steel plate system and other surgical instruments in surgical procedure in the present invention be facilitated to be combined, increase can be grasped
The property made.Preferably, the diameter of the bar portion of each above-mentioned spinous process screw 51 and isthmus screw 52 is 3.5mm~4.0mm, further,
The length of the bar portion of spinous process screw 51 is 22mm~24mm, and the length of the bar portion of above-mentioned isthmus screw 52 is 16mm~18mm, from
And it can guarantee the entrance depth of spinous process screw 51 and isthmus screw 52 centainly.
The above above-mentioned specific embodiment has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
It describes in detail bright, it should be understood that above are only specific embodiments of the present invention above, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in guarantor of the invention
Within the scope of shield.
Claims (10)
1. a kind of for screw steel plate system fixed in posterior approach for axis, which is characterized in that including spinous process screw (51), isthmus spiral shell
Follow closely (52) and spinous process steel plate (3), which includes cephalic par (31) and be separately positioned on cephalic par (31) two sides
The first shoulder (32) and the second shoulder (33), the cephalic par (31) and the anatomical structure of spinous process tip match, the first shoulder
Portion (32) matches respectively with the spinous process side of spinous process tip side and vertebral plate, and the second shoulder (33) and the spinous process tip other side
Spinous process side and push plate match respectively, above-mentioned cephalic par (31) offers for the first logical of above-mentioned spinous process screw (51) insertion
Hole (41), and the first through hole for isthmus screw (52) insertion is offered on the first shoulder (32) and the second shoulder (33) respectively
(41),
Under use state, from dentata cross section as it can be seen that above-mentioned first through hole (41) is opposite with the top middle portion of spinous process tip, spinous process
The central axes of screw (51) extend along the vertical direction, and above-mentioned each second through-hole (42) respectively with the C of respective side2/C3Joint tip out
The top of section is opposite, and the central axes of each isthmus screw (52) and the angle of vertical direction are respectively 25 °~30 °.
2. screw steel plate system as described in claim 1, which is characterized in that each shoulder includes the solution with spinous process side
Cut open the second plate body (302) learning the first plate body (301) for matching of structure and matching with the anatomical structure of push plate, and each shoulder
Plane where the first plate body (301) and angle formed by plane where the second plate body (302) are 125 °~135 ° in portion.
3. screw steel plate system as claimed in claim 2, which is characterized in that the first plate body (301) and the in each shoulder
The intersection of two plate bodys (302) is bonded the intersection of spinous process side and vertebral plate and is in smooth transition.
4. screw steel plate system as described in claim 1, which is characterized in that each second through-hole (42) and corresponding C2/C3
It is opposite at the top 5mm of zygapophysial joint.
5. screw steel plate system as described in claim 1, which is characterized in that the junction of each shoulder and cephalic par (31)
Match respectively with corresponding spinous process side and the anatomical structure of the intersection of spinous process tip.
6. screw steel plate system as claimed in any one of claims 1 to 5, which is characterized in that each spinous process screw (51) and
Isthmus screw (52) includes head and the bar portion for connecting with other surgical instruments.
7. screw steel plate system as claimed in claim 6, which is characterized in that each spinous process screw (51) and isthmus screw
(52) diameter of bar portion is 3.5mm~4.0mm.
8. screw steel plate system as claimed in claim 7, which is characterized in that the length of the bar portion of the spinous process screw (51) is
22mm~24mm, the length of the bar portion of the isthmus screw (52) are 16mm~18mm.
9. screw steel plate system as claimed in any one of claims 1 to 5, which is characterized in that the first through hole (41) and
Two through-holes (42) are locking compress hole made of being overlapped as pressurization hole slot and threaded bore portion.
10. screw steel plate system as claimed in claim 9, which is characterized in that the threaded bore portion of the first through hole (41)
Central axis is vertical with plane where the first plate body (301), the central axis and second of the threaded bore portion of each second through-hole (42)
Plane angulation where plate body (302) is 65 °~70 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811183980.8A CN109171932A (en) | 2018-10-11 | 2018-10-11 | A kind of screw steel plate system for being fixed in posterior approach for axis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811183980.8A CN109171932A (en) | 2018-10-11 | 2018-10-11 | A kind of screw steel plate system for being fixed in posterior approach for axis |
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| CN109171932A true CN109171932A (en) | 2019-01-11 |
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| CN201811183980.8A Pending CN109171932A (en) | 2018-10-11 | 2018-10-11 | A kind of screw steel plate system for being fixed in posterior approach for axis |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112426217A (en) * | 2020-10-30 | 2021-03-02 | 北京大学第三医院（北京大学第三临床医学院） | Spinous process reconstruction opening door plate |
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