CN108420473A - Distracter for implanting intervertebral implant - Google Patents
Distracter for implanting intervertebral implant Download PDFInfo
- Publication number
- CN108420473A CN108420473A CN201810145774.1A CN201810145774A CN108420473A CN 108420473 A CN108420473 A CN 108420473A CN 201810145774 A CN201810145774 A CN 201810145774A CN 108420473 A CN108420473 A CN 108420473A
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- China
- Prior art keywords
- adjusting rod
- arm
- locating
- rod
- adjusting
- Prior art date
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- 239000007943 implant Substances 0.000 title claims abstract description 17
- 238000004873 anchoring Methods 0.000 claims abstract description 35
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 238000002513 implantation Methods 0.000 claims description 20
- 210000000078 claw Anatomy 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 3
- 238000001356 surgical procedure Methods 0.000 abstract description 4
- 230000006378 damage Effects 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 210000005036 nerve Anatomy 0.000 description 5
- 210000000988 bone and bone Anatomy 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000000399 orthopedic effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 108010048734 sclerotin Proteins 0.000 description 2
- 210000000278 spinal cord Anatomy 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 206010056377 Bone tuberculosis Diseases 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 206010033799 Paralysis Diseases 0.000 description 1
- 208000020339 Spinal injury Diseases 0.000 description 1
- 201000002661 Spondylitis Diseases 0.000 description 1
- 206010000269 abscess Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 208000020431 spinal cord injury Diseases 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/0206—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors with antagonistic arms as supports for retractor elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/025—Joint distractors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/025—Joint distractors
- A61B2017/0256—Joint distractors for the spine
-
- 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
- A61B2017/564—Methods for bone or joint treatment
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
- Surgical Instruments (AREA)
Abstract
The invention discloses a spreader for implanting an intervertebral implant, which comprises an adjusting rod and two anchoring parts for fixing on a pedicle screw, wherein the two anchoring parts are arranged along the length direction of the adjusting rod and are positioned below the side of the adjusting rod, a spreading arm is respectively arranged between each anchoring part and the adjusting rod, the lower end of each spreading arm is connected with the corresponding anchoring part, the upper end of each spreading arm is bent towards one side where the adjusting rod is positioned and is connected with the adjusting rod, and the adjusting rod is provided with an adjusting mechanism for adjusting the distance between the two spreading arms. The invention has the advantages of convenient use, effective distraction, good operation stability and safety, reduction of posterior spinal surgery difficulty and the like.
Description
Technical field
The present invention relates to surgical instrument more particularly to a kind of dilators for the implantation of intervertebral implants, are mainly used for titanium
Implantation channel is established when the intervertebrals implants such as net, bone block and Invasive lumbar fusion device are implanted into.
Background technology
When the backbones destructive disease such as Spondylitis, tuberculosis of spine or tumor of spine involves centrum, centrum is often resulted in
Irregular destruction occurs, or even forms vomica, abscess streamer can enable multiple centrums be involved.Due to centrum front pillar, center pillar spongiosa
Bone ratio is high and blood fortune is abundant, therefore destruction is even more serious, is easy to form larger cavity or leads to collapse of vertebra, and centrum rear pillar
Involve less, sclerotin is also more fine and close, is the V-shape after being rotated by 90 ° from the focal area overall performance of patient side's view
Structure, and the vital tissues structure such as spinal cord, nerve root near centrum rear pillar, therefore operable space is very narrow in art.Through
It, safely and effectively will be hard and not how in smaller operating space when way of escape row backbone focal cleaning intervertebral bone graft is performed the operation
Titanium net, bone block or the Invasive lumbar fusion device of rule are filled into the huge defect of front pillar, center pillar, this is always to perplex spinal surgery doctor
The great difficult problem of teacher.
Traditional way, needs while cutting off periphery sclerotin as far as possible, artificially uses nerve root retracto, nerve stripping
Son pulls open the institutional frameworks such as spinal cord, nerve root as possible, and channel is implanted into the hope of expanding.This generic operation is very laborious and risk is high,
It is careless slightly to will result in spinal cord injury, cause patient to paralyse.And only by the implantation channel that nerve root retracto is set up, no
Only space is limited, and highly unstable, and patient is slightly slack to be easy for breaking off relations, and not only channel occludes again, also easily causes
New damage.Understand that there are huge security risks for traditional instrument, it would be highly desirable to improve.
Invention content
The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, provide it is a kind of easy-to-use, can be effective
Ground struts, and the stability of operation and safety are good, reduces the strutting for the implantation of intervertebral implants of way of escape spinal operation difficulty
Device.
In order to solve the above technical problems, the present invention uses following technical scheme：
A kind of dilator for the implantation of intervertebral implants, including adjusting rod and two nail on for fixing to pedicle of vertebral arch screw
Anchoring piece, two anchoring pieces along the adjusting rod length direction arrangement and positioned at the side-lower of adjusting rod, it is each described
It is respectively equipped with one between anchoring piece and the adjusting rod and struts arm, the arm lower end that struts is connected with corresponding anchoring piece, support
Open arms upper end bends to the side where adjusting rod and is connected with adjusting rod, and the adjusting rod, which is equipped with, to be used for adjusting described in two
Strut the regulating mechanism of distance between arm.
As a further improvement of the above technical scheme：The anchoring piece includes locating rod, the pedicle screw upper end
Equipped with locating slot, locking nut is equipped in the locating slot, the locating rod is pressed in the positioning by the locking nut
In slot, the locating rod is located at the part except locating slot and is equipped with interconnecting piece, and the arm lower end that struts is hollow structure, the company
Socket part struts arm lower end described in being inserted in.
As a further improvement of the above technical scheme：The locating slot, and locating rod two are run through in the locating rod both ends
End is equipped with positioning region, and the pedicle screw is located between the positioning region at locating rod both ends, and the interconnecting piece is located therein one
Above the positioning region at end.
As a further improvement of the above technical scheme：The interconnecting piece is cone structure, and the positioning region is sheet knot
Structure.
As a further improvement of the above technical scheme：The adjusting rod periphery is arranged with slider case, wherein an institute
It states and struts arm and be fixedly connected with the adjusting rod, arm is strutted described in another and is fixedly connected with the slider case on adjusting rod, institute
It includes the rotating handle being set on slider case, with the hinged claw of slider case and set on claw and cunning to state regulating mechanism
The torsional spring on articulated shaft between dynamic shell, the adjusting rod are equipped with multiple first and adjust tooth, the rotation hand along its length
For handle circumferentially arranged with multiple the second adjusting teeth for adjusting tooth engagement with described first, the slider case is equipped with through-hole, described
Claw one end is across the through-hole and supports set on two neighboring described first adjusts tooth, a torque arm of the torsional spring and institute
It states slider case to offset, another torque arm offsets with the claw other end.
As a further improvement of the above technical scheme：Along the axial direction of the rotating handle, described second adjusts the two of tooth
Side is respectively equipped with press head and locating ring, and the slider case is located at described press between head and the locating ring.
Compared with the prior art, the advantages of the present invention are as follows：Strutting for the implantation of intervertebral implants disclosed by the invention
Device, using pedicle screw as anchor point, impetus is more reliable, struts the distracted strength of arm and passes through anchoring piece, pedicle of vertebral arch screw
Nail can be conducted by vertebra rear pillar to front pillar, center pillar, and order struts more thoroughly, and channel exposure is more abundant, while can be played pair
The orthopedic effect of front pillar, center pillar, achieves many things at one stroke；Anchoring piece can be installed first as intermediate force transferring part and fix anchoring piece, steady
It carries out strutting operation again in the state of foregone conclusion portion centrum, effectively avoids the secondary damage in orthopaedic procedures, and anchoring piece and vertebral arch
Root screw is detachably connected, convenient for being cut according to different patients (adult is different with the pedicle screw specification that child uses), operation
Mouth size is adjusted flexibly, without replacing complete equipment；Adjusting rod is set to above the side of pedicle screw and will be strutted
Arm is set as bending structure so that between two pedicle screws without any blockage, implantation channel fully exposes, and operating space is big
Amplitude increases, and is operated convenient for patient；Using regulating mechanism adjusting determine two strut the distance between arm after, Shu Zhewu
It need to firmly be maintained again, surgical procedure can be absorbed in, avoid the occurrence of distraction instrument during strutting " accidentally dropping " or " slipping out of the hand " etc.
Rudimentary error.
Description of the drawings
Fig. 1 is dimensional decomposition structure diagram of the present invention for the dilator of intervertebral implants implantation.
Fig. 2 is the amplified main structure diagram of regulating mechanism in the present invention.
Fig. 3 is the dimensional structure diagram of the rotating handle in the present invention.
Fig. 4 is the dimensional structure diagram of the anchoring piece another kind embodiment in the present invention.
Each label indicates in figure：1, pedicle screw；11, locating slot；12, locking nut；2, adjusting rod；21, shell is slided
Body；22, first tooth is adjusted；23, through-hole；3, anchoring piece；31, locating rod；32, positioning region；33, interconnecting piece；4, arm is strutted；5, it adjusts
Save mechanism；51, rotating handle；511, press head；512, locating ring；52, claw；53, torsional spring；531, torque arm；54, it second adjusts
Tooth.
Specific implementation mode
Below in conjunction with Figure of description and specific embodiment, invention is further described in detail.
Fig. 1 to Fig. 3 shows a kind of embodiment of the present invention, the strutting for the implantation of intervertebral implants of the present embodiment
Device, including adjusting rod 2 and two are for fixing to the anchoring piece 3 on pedicle screw 1, length of two anchoring pieces 3 along adjusting rod 2
It spends direction arrangement and positioned at the side-lower of adjusting rod 2 (being lower left in Fig. 1), is respectively equipped between each anchoring piece 3 and adjusting rod 2
One struts arm 4, struts 4 lower end of arm and is connected with corresponding anchoring piece 3, and the side where strutting 4 upper end of arm to adjusting rod 2 is bent
And be connected with adjusting rod 2, adjusting rod 2, which is equipped with, to be used for adjusting two regulating mechanisms 5 for strutting distance between arm 4.
This is used for the dilator of intervertebral implants implantation, and using pedicle screw 1 as anchor point, impetus is more reliable,
Strutting 4 distracted strength of arm and passing sequentially through anchoring piece 3, pedicle screw 1 can be conducted by vertebra rear pillar to front pillar, center pillar, enable support
It opens more thoroughly, the exposure of implantation channel is more abundant, while can play the effect orthopedic to front pillar, center pillar, achieves many things at one stroke；Anchor
Firmware 3 is used as intermediate force transferring part, can first be installed on two pedicle screws 1 correspondingly and fix anchoring piece 3, steady
In the state of foregone conclusion portion centrum, then carries out strutting operation again, effectively avoid the secondary damage in orthopaedic procedures, and pass through anchoring
The setting of part 3, convenient for according to different patients (adult is different with 1 specification of pedicle screw that child uses), operative incision size
Etc. being adjusted flexibly, without replacing instrumentarium；It (is left in Fig. 1 that adjusting rod 2, which is set to above the side of pedicle screw 1,
Lower section) and arm 4 will be strutted be set as bending structure so that between two pedicle screws 1 without any blockage, implantation channel is abundant
Exposure, operating space increases considerably, is operated convenient for patient；Using regulating mechanism 5 adjusting determine two strut arm 4 it
Between distance after, patient no longer needs to firmly maintain, and can be absorbed in surgical procedure, avoids the occurrence of distraction instrument during strutting
The rudimentary error such as " accidentally dropping " or " slipping out of the hand ".
Fig. 4, the first embodiment of anchoring piece 3, including locating rod 31 specifically are referred to, 1 upper end of pedicle screw is equipped with
Locating slot 11, locating slot 11 is interior to be equipped with locking nut 12, and locating rod 31 is pressed in by locking nut 12 in locating slot 11, is positioned
Bar 31 is located at the part except locating slot 11 and is equipped with interconnecting piece 33, and it is hollow structure to strut 4 lower end of arm, and interconnecting piece 33 is inserted in support
4 lower end of open arms.The anchoring piece 3 of this kind of structure is conducive to the fast assembling-disassembling on pedicle screw 1, when shortening the preparation of instrument
Between；Anchoring piece 3 is connect reliably with arm 4 is strutted, not easily to fall off.It is particularly suitable for that spinal injury region is longer, needs multiple segments
Whole distracted patient, the length of locating rod 31 will be grown compared with second of embodiment simultaneously, may span across 2 pedicle screws 1.
Fig. 1 specifically is referred to, second of embodiment of anchoring piece 3, on the basis of the first embodiment, locating rod 31 is passed through
Locating slot 11 is worn, and 31 both ends of locating rod are equipped with positioning region 32, pedicle screw 1 is located at the positioning region 32 at 31 both ends of locating rod
Between, interconnecting piece 33 is located therein 32 top of positioning region of one end.The anchoring piece 3 of this kind of structure is for single pedicle screw 1
Anchoring effect it is more preferable, realization accurately strut, and can by anchoring piece 3 drive two pedicle screws 1 be located remotely from each other (correspondence
Strut process) or draw close (retraction process after corresponding implantation).Preferably, positioning region 32 is using the piece for extending vertically through locating rod 31
Shape structure or loop configuration set on 31 periphery of locating rod, while the size of locating plate or locating ring is preferably greater than locating slot 11
Width and the diameter for being less than 1 upper end of pedicle screw, while improving the reliability of anchoring, occupied space is few, is conducive to hand
Art operates；Interconnecting piece 33 preferably uses cone-shaped structure, convenient for strut arm 4 and connect, while also can preferably transmit and strut work
Firmly.
Further, 2 periphery of adjusting rod is arranged with slider case 21, wherein one struts arm 4 and fixed with adjusting rod 2 and connected
It connects, another struts arm 4 and be fixedly connected with the slider case 21 on adjusting rod 2, and regulating mechanism 5 includes being set on slider case 21
Rotating handle 51 and the hinged claw 52 and the articulated shaft between claw 52 and slider case 21 of slider case 21
On torsional spring 53, adjusting rod 2 is equipped with multiple first and adjusts teeth 22 along its length, and rotating handle 51 is circumferentially arranged with multiple with the
One, which adjusts tooth 22 engages second, adjusts tooth 54, and slider case 21 is equipped with through-hole 23, and 52 one end of claw passes through through-hole 23 and supports
Between two neighboring first adjusts tooth 22, a torque arm 531 and the slider case 21 of torsional spring 53 offset, another torque arm
531 offset with 52 other end of claw.In the present embodiment, 2 cross section of adjusting rod is rectangular configuration, and first, which adjusts tooth 22, is set to adjusting
2 upper surface of bar.Needing to adjust two makes rotating handle 51 rotate when strutting the distance between arm 4, due to second adjust tooth 54 with
First, which adjusts tooth 22, is intermeshed so that rotating handle 51, slider case 21, be connected with slider case 21 to strut arm 4 etc. whole
Body moves on adjusting rod 2, after movement in place, decontrols claw 52,52 one end of claw is revolved under the action of torsional spring 53 around articulated shaft
Turn, the other end is caught between two first adjacent adjusting teeth 22, is limited the arm 4 that struts being connected with slider case 21 and is retracted, knot
Structure is simple, reliable, easy to operate.
Further, in the present embodiment, along the axial direction of rotating handle 51, the both sides of the second adjusting tooth 54 are respectively equipped with pressure
Riveter 511 and locating ring 512, slider case 21, which is located at, to press between first 511 and locating ring 512.Wherein, pressing first 511 can be
When assembly, rotating handle 51 is first passed through into slider case 21, is then pressed.In the effect of first 511 and locating ring 512 that presses
Under rotating handle 51 can be prevented to be axially moveable, the reliability of lifting means.
Although the present invention has been disclosed as a preferred embodiment, however, it is not intended to limit the invention.It is any to be familiar with ability
The technical staff in domain, without deviating from the scope of the technical scheme of the present invention, all using the technology contents pair of the disclosure above
Technical solution of the present invention makes many possible changes and modifications, or is revised as the equivalent embodiment of equivalent variations.Therefore, every
Without departing from the content of technical solution of the present invention, according to the present invention technical spirit any simple modification made to the above embodiment,
Equivalent variations and modification, all shall fall within the protection scope of the technical scheme of the invention.
Claims (6)
1. a kind of dilator for the implantation of intervertebral implants, it is characterised in that：Including adjusting rod (2) and two for fixing to
Anchoring piece (3) on pedicle screw (1), length direction arrangement and position of two anchoring pieces (3) along the adjusting rod (2)
Side-lower in adjusting rod (2) is respectively equipped with one and struts arm (4) between each anchoring piece (3) and the adjusting rod (2),
Arm (4) lower end that struts is connected with corresponding anchoring piece (3), struts the side bending where arm (4) upper end to adjusting rod (2)
And be connected with adjusting rod (2), the adjusting rod (2) be equipped be used for adjust arm (4) is strutted described in two between distance adjusting
Mechanism (5).
2. the dilator according to claim 1 for the implantation of intervertebral implants, it is characterised in that：The anchoring piece (3)
Including locating rod (31), pedicle screw (1) upper end is equipped with locating slot (11), and locking screw is equipped in the locating slot (11)
Female (12), the locating rod (31) are pressed in by the locking nut (12) in the locating slot (11), the locating rod
(31) it is located at the part except locating slot (11) and is equipped with interconnecting piece (33), described arm (4) lower end that struts is hollow structure, the company
Socket part (33) struts arm (4) lower end described in being inserted in.
3. the dilator according to claim 2 for the implantation of intervertebral implants, it is characterised in that：The locating rod (31)
The locating slot (11) is run through at both ends, and locating rod (31) both ends are equipped with positioning region (32), and the pedicle screw (1) is located at
Between the positioning region (32) at locating rod (31) both ends, the interconnecting piece (33) is located therein on the positioning region (32) of one end
Side.
4. the dilator according to claim 3 for the implantation of intervertebral implants, it is characterised in that：The interconnecting piece (33)
For cone structure, the positioning region (32) is laminated structure.
5. the dilator according to claim 1 or 2 or 3 or 4 for the implantation of intervertebral implants, it is characterised in that：It is described
Adjusting rod (2) periphery is arranged with slider case (21), is fixedly connected with the adjusting rod (2) wherein strutting arm (4) described in one,
It struts arm (4) described in another to be fixedly connected with the slider case (21) on adjusting rod (2), the regulating mechanism (5) includes setting
In on slider case (21) rotating handle (51), with the hinged claw (52) of slider case (21) and be set to claw (52)
Torsional spring (53) on articulated shaft between slider case (21), the adjusting rod (2) are equipped with multiple first and adjust along its length
Tooth (22) is saved, the rotating handle (51) adjusts tooth circumferentially arranged with multiple second engaged with the first adjusting tooth (22)
(54), the slider case (21) is equipped with through-hole (23), and described claw (52) one end passes through the through-hole (23) and supports and is set to
Between two neighboring described first adjusts tooth (22), a torque arm (531) and the slider case (21) of the torsional spring (53)
It offsets, another torque arm (531) offsets with the claw (52) other end.
6. the dilator according to claim 5 for the implantation of intervertebral implants, it is characterised in that：Along the rotating handle
(51) both sides of axial direction, the second adjusting tooth (54) are respectively equipped with the head that presses (511) and locating ring (512), the sliding
Shell (21) is located at described press between head (511) and the locating ring (512).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810145774.1A CN108420473B (en) | 2018-02-12 | 2018-02-12 | Distracter for implanting intervertebral implant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810145774.1A CN108420473B (en) | 2018-02-12 | 2018-02-12 | Distracter for implanting intervertebral implant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108420473A true CN108420473A (en) | 2018-08-21 |
| CN108420473B CN108420473B (en) | 2019-12-13 |
Family
ID=63156998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810145774.1A Active CN108420473B (en) | 2018-02-12 | 2018-02-12 | Distracter for implanting intervertebral implant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108420473B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110652352A (en) * | 2019-10-09 | 2020-01-07 | 兰州大学第一医院 | Minimally invasive percutaneous screw vertebral body distractor |
| CN113613574A (en) * | 2019-03-22 | 2021-11-05 | 德克萨斯苏格兰礼仪儿童医院 | Hinge-connector spinal correction device and method |
| CN113796901A (en) * | 2021-10-23 | 2021-12-17 | 中国人民解放军空军军医大学 | Spine fracture posterior quantitative distraction reduction external fixation device for spine surgery |
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