CN107212918A - It is a kind of to prevent from resetting the internal fixation device of spine lost - Google Patents
It is a kind of to prevent from resetting the internal fixation device of spine lost Download PDFInfo
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- CN107212918A CN107212918A CN201710551421.7A CN201710551421A CN107212918A CN 107212918 A CN107212918 A CN 107212918A CN 201710551421 A CN201710551421 A CN 201710551421A CN 107212918 A CN107212918 A CN 107212918A
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- nail
- connecting plate
- resetting
- vertebral arch
- pedicle
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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
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
-
- 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
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7002—Longitudinal elements, e.g. rods
-
- 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
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
-
- 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
- A61B17/861—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
- A61B17/862—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver at the periphery of the screw head
-
- 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
- A61B17/8625—Shanks, i.e. parts contacting bone tissue
-
- 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
-
- 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
- A61B2017/8655—Pins or screws or threaded wires; nuts therefor with special features for locking in the bone
Abstract
The invention discloses a kind of internal fixation device of spine for preventing from resetting and losing, it includes pedicle of vertebral arch and fixes nail, backbone connecting plate and locating shim, the pedicle of vertebral arch fixes nail and is at least set to two, two pedicles of vertebral arch fix the both sides that nail is slidably connected at the backbone connecting plate, the pedicle of vertebral arch, which fixes nail, includes the head of a nail and the rivet nut being connected with the head of a nail, the locating shim is provided with through hole, the sliding groove being distributed along the backbone connecting plate long side direction is offered in the middle part of the backbone connecting plate, the sliding groove includes upper hopper chute and gliding groove, the locating shim is slidably connected in the gliding groove, the rivet nut sequentially passes through the upper hopper chute, the through hole and the backbone connecting plate are connected and locating shim activity is between the head of a nail and the gliding groove upper surface, a kind of internal fixation device of spine for preventing that reset from losing that the present invention is provided has simple to operate, prevent from resetting the advantage lost.
Description
Technical field
The present invention relates to medical instruments field, more particularly to a kind of internal fixation device of spine for preventing from resetting loss.
Background technology
Spine fracture is the common wound of field of orthopaedics, and its incidence is about 5%-6%.When external force acts on certain in backbone
When one centrum fractures, the fore-and-aft distance of centrum diminishes, so as to produce terminal plate of vertebral body fracture, interverbebral disc rearward charges into compressing
The nerve fiber or intraspinal tube spinal cord of surrounding, have a strong impact on the quality of life of patient.At present, with the hair of internal fixation of spine technology
Exhibition, it is very universal using the regression of steel plate screw treatment pathologic, spinal trauma in cervical vertebra, thoracic vertebrae and lumbar vertebrae.By decades
Development, occur in that the structure design of a variety of internal fixation device of spine.Research shows that the use of internal fixation of spine technology can increase
Plus bone fusion rate, increase anti-rotation intensity, axial load and resist and stretch Qu Li.Due to the special physiological structure of human spine and activity
Frequency, design for spinal internal fixation system and manufacture require high, do not require nothing more than with good biomechanical strength, together
When also required firm screw anti-receding device.
Existing regulation internal fixation device of spine typically can all realize the reset of centrum, and the centrum after reset is consolidated
It is fixed, centrum can be made to recover its original height.But, in practical operation, vertebral fracture is carried out using internal fixation device of spine
After reset, in the fixation procedure of locking nut and screw, reset can be produced and lost so that it is original that centrum does not recover its completely
Curve, reset effect is bad.Therefore, how to reduce reset of the internal fixation device of spine in operating process is resetted to lose so that
Centrum obtains satisfied orthopedic reset effect, is the technical problem that those skilled in the art are badly in need of solving at present.
The content of the invention
It is an object of the invention to overcome shortcoming and deficiency of the prior art there is provided one kind it is simple to operate, prevent reset
The internal fixation device of spine of loss.
To achieve these goals, the invention provides a kind of internal fixation device of spine for preventing from resetting and losing, it includes
Pedicle of vertebral arch fixes nail, backbone connecting plate and locating shim, and the pedicle of vertebral arch fixes nail and is at least set to two, two pedicles of vertebral arch
Fixed nail is slidably connected at the both sides of the backbone connecting plate, and the pedicle of vertebral arch, which fixes nail, to be included the head of a nail and be connected with the head of a nail
The rivet nut connect, the locating shim is provided with through hole, offers in the middle part of the backbone connecting plate long along the backbone connecting plate
Edge direction distribution sliding groove, the sliding groove include upper hopper chute and gliding groove, the locating shim be slidably connected at it is described under
In chute, the rivet nut sequentially passes through the upper hopper chute, the through hole and is connected with the backbone connecting plate and the locating shim
Activity is between the head of a nail and the gliding groove upper surface, the one side of the locating shim and the gliding groove upper surface
Provided with lower positioning tooth, the gliding groove upper surface is provided with upper positioning tooth, when the lower positioning tooth is engaged with the upper positioning tooth,
The relative position that the pedicle of vertebral arch is fixed between nail and the backbone connecting plate is locked.
As the improvement of above-mentioned technical proposal, the head of a nail includes through hole and the compression bullet in the through hole
Spring, retaining fixture block, the retaining fixture block are set to two, and two retaining fixture blocks are separately mounted to the two ends of the through hole,
The compression spring is squeezed between two retaining fixture blocks.
As the improvement of above-mentioned technical proposal, the side wall of the upper hopper chute, which is offered, is provided with snap fit in neck, the neck,
The snap fit is engaged with the retaining fixture block.
As the improvement of above-mentioned technical proposal, the retaining fixture block includes cylinder and is connected to the cylinder ends
Tapered protrusion, the tapered protrusion is provided with the compressive plane seamlessly transitted.
As the improvement of above-mentioned technical proposal, the backbone connecting plate is at least set to two, and adjacent two backbones connect
Transverse connection is provided between fishplate bar, the transverse connection is flexibly connected with the backbone connecting plate.
As the improvement of above-mentioned technical proposal, the rivet nut includes rivet nut body and twist set along rivet nut body
Rivet nut body surface between screw thread, the two neighboring screw thread is provided with some lines of creeping, line and the screw thread of creeping
Direction of rotation is parallel.
As the improvement of above-mentioned technical proposal, line equidistantly distributed of being creeped described in some is two neighboring described to climb Xing Wen
Between space D 1, wherein 0 μm≤D1≤500 μm.
As the improvement of above-mentioned technical proposal, a diameter of D2 that the pedicle of vertebral arch fixation is followed closely, wherein 4.5mm≤D2≤
6.0mm, the length that the pedicle of vertebral arch fixes nail is L, wherein 30mm≤L≤50mm.
Present invention also offers a kind of application method for preventing from resetting the internal fixation device of spine lost, it includes following step
Suddenly：
S1, determine that according to spinal trauma position pedicle of vertebral arch fixes the installation site of nail；
Pedicle of vertebral arch is fixed nail through locating pad by S2, regulation pedicle of vertebral arch after fixing the position relative to backbone connecting plate of nail
Piece and backbone connecting plate are hammered into and had determined that in the centrum of position；
Two neighboring backbone is connected by transverse connection after S3, the relative position of the two neighboring backbone connecting plate of regulation
Plate is fixedly connected；
In a kind of step S3 of the application method of above-mentioned internal fixation device of spine for preventing reset from losing, when the retaining of the head of a nail
When fixture block is sticked into the neck of upper hopper chute side wall, S3 steps are completed.
A kind of internal fixation device of spine for preventing from resetting loss that the present invention is provided, compared with prior art, with such as
Lower beneficial effect：This prevents the pedicle of vertebral arch for resetting the internal fixation device of spine lost from fixing nail and hammering into after vertebra centrum, by fixed
The upper positioning tooth occlusion of the lower positioning tooth of position pad and the gliding groove of backbone connecting plate is fixed make it that relative position is locked between the two
Extremely, reach prevents pedicle of vertebral arch from fixing nail and occurring to loosen and ultimately result in the problem of reset is lost long-term effectively.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will simply be situated between to the accompanying drawing of embodiment below
Continue.
Fig. 1 is a kind of stereogram for preventing from resetting the internal fixation device of spine lost provided in an embodiment of the present invention；
Fig. 2 is the profile of retaining fixture block provided in an embodiment of the present invention and backbone connecting plate fastening state；
Fig. 3 is a kind of side view for preventing from resetting the internal fixation device of spine lost provided in an embodiment of the present invention；
Fig. 4 is a kind of section for preventing from resetting the sliding groove for the internal fixation device of spine lost provided in an embodiment of the present invention
Figure；
Fig. 5 is the structural representation for the rivet nut that pedicle of vertebral arch provided in an embodiment of the present invention fixes nail；
Fig. 6 is a kind of structural representation for preventing from resetting the retaining fixture block for the internal fixation device of spine lost.
Wherein, 1- pedicles of vertebral arch fix nail；The 11- heads of a nail；111- compression springs；112- retaining fixture blocks；112a- tapered protrusions；
112b- cylinders；12- rivet nuts；121- screw threads；122- creeps line；2- backbone connecting plates；21- sliding grooves；211- upper hopper chutes；
212- gliding grooves；The upper positioning tooths of 212a-；22- necks；3- transverse connections；4- locating shims；Positioning tooth under 41-.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Referring to shown in Fig. 1-Fig. 6, the invention provides a kind of internal fixation device of spine for preventing from resetting and losing, it includes vertebra
Nut fixes nail 1, backbone connecting plate 2 and locating shim 4, and the pedicle of vertebral arch fixes nail 1 and is at least set to two, two vertebral arch
Root fixes the both sides that nail 1 is slidably connected at the backbone connecting plate 2, the pedicle of vertebral arch fix nail 1 include the head of a nail 11 and with it is described
The rivet nut 12 that the head of a nail 11 is connected, the locating shim 4 is provided with through hole (not shown), the backbone connecting plate 2
Portion offers the sliding groove 21 being distributed along the long side direction of backbone connecting plate 2, and the sliding groove 21 includes upper hopper chute 211 with
Chute 212, the locating shim 4 is slidably connected in the gliding groove 212, and the rivet nut 12 sequentially passes through the upper hopper chute
211st, the through hole is connected with the backbone connecting plate 2 and the activity of the locating shim 4 is in the head of a nail 11 and the gliding groove
Between 212 upper surfaces, the one side of the locating shim 4 and the upper surface of gliding groove 212 is provided with lower positioning tooth 41, described
The upper surface of gliding groove 212 is provided with upper positioning tooth 212a, described when the lower positioning tooth 41 is engaged with the upper positioning tooth 212a
The relative position that pedicle of vertebral arch is fixed between nail 1 and the backbone connecting plate 2 is locked.One kind that the present invention is provided, which prevents from resetting, loses
Internal fixation device of spine, compared with prior art, have the advantages that：This prevents from resetting the internal fixation of spine lost
The pedicle of vertebral arch of device is fixed nail 1 and hammered into after vertebra centrum, by under the lower positioning tooth 41 and backbone connecting plate 2 of locating shim 4
The upper positioning tooth 212a occlusions of chute 212 are fixed make it that relative position is locked between the two, and reach prevents vertebral arch long-term effectively
Root fixes nail 1 and occurs to loosen and ultimately result in the problem of reset is lost.
More preferably, in the present embodiment, the head of a nail 11 includes through hole and the compression bullet in the through hole
Spring 111, retaining fixture block 112, the retaining fixture block 112 are set to two, and two retaining fixture blocks 112 are separately mounted to described pass through
The two ends of through hole, the compression spring 111 is squeezed between two retaining fixture blocks 112.The side wall of the upper hopper chute 211 is opened
Provided with neck, be provided with snap fit in the neck, the snap fit be engaged with the retaining fixture block 112 it is locked, to reach vertebral arch
Root fixes the locked effect of fixation of nail 1, it is to avoid pedicle of vertebral arch is fixed the generation of nail 1 and loosened to be lost so as to cause to reset.
More preferably, in the present embodiment, the retaining fixture block 112 includes cylinder 112b and is connected to the cylinder
The tapered protrusion 112a of 112b ends.The tapered protrusion 112a is provided with the compressive plane seamlessly transitted, is fixed in pedicle of vertebral arch under nail 1
During nail, tapered protrusion 112a compressive plane is squeezed in the snap fit surface in neck under the active force of compression spring 111
So that tapered protrusion 112a is slowly sticked into neck, and on the inside of the snap fit that neck is fully entered to compressive plane, tapered protrusion 112a
Engage with snap fit, reach the locked effect of fixation of pedicle of vertebral arch fixation nail 1, to avoid the generation loosening of pedicle of vertebral arch fixation nail 1 from leading
Cause to reset and lose.
More preferably, in the present embodiment, the backbone connecting plate 2 is at least set to two, adjacent two backbone connections
Transverse connection is provided between plate 2, the transverse connection is flexibly connected with the backbone connecting plate 2.Specifically, laterally connecting
Fitting includes transverse connecting rod and is arranged on the fixing device at the transverse connecting rod two ends, and the fixing device is connected with backbone
Plate 2 is flexibly connected, and fixing device is provided with locking mechanism, and backbone connecting plate 2 can coordinate fixing device to be moved to after correct position
It is locked by locking mechanism so that described to prevent that resetting the internal fixation device of spine lost forms firm overall structure,
Avoid resetting the problem of losing.
More preferably, in the present embodiment, the rivet nut 12 includes the body of rivet nut 12 and twist set along the body of rivet nut 12
The body surface of rivet nut 12 between the screw thread 121 put, the two neighboring screw thread 121 is described to climb provided with some lines 122 of creeping
Row line 122 is parallel with the direction of rotation of screw thread 121.Specifically, creeped described in some the equidistantly distributed of line 122, adjacent two
The individual space D 1 climbed between Xing Wen, draws 0 μm≤D1≤500 μm, the model of the space D 1 by experimenter's many experiments
The good effect of creeping for promoting osteocyte can be reached by enclosing, and contributed to osteocyte to fix nail 1 with pedicle of vertebral arch and merged, form bone and melt
Close day state and can reach the problem of preventing the generation loosening of pedicle of vertebral arch fixation nail 1 long-term effectively and ultimately result in reset loss.Enter
One step, in order to reach good biocompatibility, the rivet nut 12 of pedicle of vertebral arch fixation nail 1 can select medical metal and be made, simultaneously
Coupled computer three-dimensional modeling is manufactured.
It should be noted that the pedicle of vertebral arch fixes a diameter of D2, wherein 4.5mm≤D2≤6.0mm, the vertebra of nail 1
The length that nut fixes nail 1 is L, wherein 30mm≤L≤50mm, and experiment proves that the pedicle of vertebral arch of the size range is fixed nail 1 and had
Good mechanical strength, it is easy to be implanted into centrum, with preferable intensity and toughness.
Present invention also offers a kind of application method for preventing from resetting the internal fixation device of spine lost, it includes following step
Suddenly：
S1, determine that according to spinal trauma position pedicle of vertebral arch fixes the installation site of nail 1；
Specifically, staff fixes the installation site of nail 1 according to the part mark pedicle of vertebral arch of patient spine wound, so as to
The pedicle of vertebral arch of next step fixes the installation of nail 1.
S2, regulation pedicle of vertebral arch are fixed behind the position relative to backbone connecting plate 2 of nail 1 pedicle of vertebral arch fixing nail 1 through fixed
Position pad 4 and backbone connecting plate 2 are hammered into and had determined that in the centrum of position；
Specifically, regulation section pedicle of vertebral arch fixes the position relative to backbone connecting plate 2 of nail 1 first, then to pedicle of vertebral arch
Fixed nail 1 carries out pushing work, when the retaining fixture block 112 of the head of a nail 11 is sticked into the neck of the side wall of upper hopper chute 211, pedicle of vertebral arch
The work that hammers into of fixed nail 1 is completed.
Two neighboring backbone is connected by transverse connection after S3, the relative position of the two neighboring backbone connecting plate 2 of regulation
Fishplate bar 2 is fixedly connected；
Specifically, transverse connection includes transverse connecting rod and is arranged on the fixing device at the transverse connecting rod two ends,
Fixing device is combined connection with backbone connecting plate 2 by staff, and backbone connecting plate 2 can coordinate fixing device to be moved to suitable position
Postpone and be locked by locking mechanism so that be described to prevent that resetting the internal fixation device of spine lost forms firm overall knot
Structure, it is to avoid reset the problem of losing.
A kind of internal fixation device of spine for preventing from resetting loss that the present invention is provided, compared with prior art, with such as
Lower beneficial effect：This prevents the pedicle of vertebral arch for resetting the internal fixation device of spine lost from fixing nail 1 and hammering into after vertebra centrum, by fixed
The upper positioning occlusion of the lower positioning tooth 41 and backbone connecting plate 2 of position plate is fixed, and relative position is locked between the two, and reach has for a long time
Prevent to effect pedicle of vertebral arch from fixing nail 1 and occurring to loosen and ultimately result in the problem of reset is lost.
In the description of the invention, it is to be understood that indicating position or the position such as term " on ", " under ", "left", "right"
Relation is, based on orientation shown in the drawings or position relationship, to be for only for ease of the description present invention and simplify description, without referring to
Show or imply that the device or element of meaning must have specific orientation and specific azimuth configuration and operation, it is thus impossible to
It is interpreted as limitation of the present invention.In addition, " first ", " second " are merely due to describe purpose, and it is not intended that indicate or imply
Relative importance or the implicit quantity for indicating indicated technical characteristic.Therefore, define " first ", the feature of " second " can
To express or implicitly include one or more this feature.In description of the invention, unless otherwise indicated, " multiples' " contains
Justice is two or more.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation " " phase
Even " " connection " etc. should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；
Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected with by intermediary, can be with
It is the connection of two element internals.For the ordinary skill in the art, concrete condition can be regarded and understands above-mentioned term
Concrete meaning in the present invention.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of prevent from resetting the internal fixation device of spine lost, it is characterised in that fixes nail, backbone connecting plate including pedicle of vertebral arch
And locating shim, the pedicle of vertebral arch, which is fixed to follow closely, is at least set to two, and two pedicles of vertebral arch fix nails and are slidably connected at the ridge
The both sides of post connecting plate, the pedicle of vertebral arch, which fixes nail, includes the head of a nail and the rivet nut being connected with the head of a nail, the locating shim
It is provided with the sliding groove for offering and being distributed along the backbone connecting plate long side direction in the middle part of through hole, the backbone connecting plate, institute
Stating sliding groove includes upper hopper chute and gliding groove, and the locating shim is slidably connected in the gliding groove, and the rivet nut is worn successively
Cross the upper hopper chute, the through hole be connected with the backbone connecting plate and the locating shim activity the head of a nail with it is described under
Between tongue upper surface, the one side of the locating shim and the gliding groove upper surface is provided with lower positioning tooth, the downslide
Groove upper surface is provided with upper positioning tooth, when the lower positioning tooth is engaged with the upper positioning tooth, and the pedicle of vertebral arch fixes nail and institute
State the relative position locking between backbone connecting plate.
2. according to claim 1 prevent from resetting the internal fixation device of spine lost, it is characterised in that：The head of a nail includes
Through hole and compression spring in the through hole, retaining fixture block, the retaining fixture block are set to two, described in two only
The two ends that fixture block is separately mounted to the through hole are moved back, the compression spring is squeezed between two retaining fixture blocks.
3. according to claim 2 prevent from resetting the internal fixation device of spine lost, it is characterised in that：The upper hopper chute
Side wall, which is offered, is provided with snap fit in neck, the neck, the snap fit is engaged with the retaining fixture block.
4. according to claim 2 prevent from resetting the internal fixation device of spine lost, it is characterised in that：The retaining fixture block
Including cylinder and the tapered protrusion for being connected to the cylinder ends, the tapered protrusion is provided with the compressive plane seamlessly transitted.
5. according to claim 1 prevent from resetting the internal fixation device of spine lost, it is characterised in that：The backbone connection
Plate is at least set to be provided with transverse connection, the transverse connection and institute between two, adjacent two backbone connecting plates
State the flexible connection of backbone connecting plate.
6. according to claim 1 prevent from resetting the internal fixation device of spine lost, it is characterised in that：The rivet nut includes
Rivet nut body surface between rivet nut body and the screw thread twist set along rivet nut body, the two neighboring screw thread is provided with
Some lines of creeping, the line of creeping is parallel with the screw thread rotation direction.
7. according to claim 6 prevent from resetting the internal fixation device of spine lost, it is characterised in that：Climbed described in some
Row line equidistantly distributed, the two neighboring space D 1 climbed between Xing Wen, wherein 0 μm≤D1≤500 μm.
8. according to claim 1 prevent from resetting the internal fixation device of spine lost, it is characterised in that：The pedicle of vertebral arch is consolidated
Surely a diameter of D2 followed closely, wherein 4.5mm≤D2≤6.0mm, the pedicle of vertebral arch fix the length of nail for L, and wherein 30mm≤L≤
50mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710551421.7A CN107212918A (en) | 2017-07-07 | 2017-07-07 | It is a kind of to prevent from resetting the internal fixation device of spine lost |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710551421.7A CN107212918A (en) | 2017-07-07 | 2017-07-07 | It is a kind of to prevent from resetting the internal fixation device of spine lost |
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| Publication Number | Publication Date |
|---|---|
| CN107212918A true CN107212918A (en) | 2017-09-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710551421.7A Pending CN107212918A (en) | 2017-07-07 | 2017-07-07 | It is a kind of to prevent from resetting the internal fixation device of spine lost |
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| CN106539615A (en) * | 2016-10-25 | 2017-03-29 | 天津市新中医疗器械有限公司 | A kind of child's bone malformation is orthopedic to use eight letter stencils |
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