CN109199566B - Pedicle screw feeding device - Google Patents
Pedicle screw feeding device Download PDFInfo
- Publication number
- CN109199566B CN109199566B CN201710542565.6A CN201710542565A CN109199566B CN 109199566 B CN109199566 B CN 109199566B CN 201710542565 A CN201710542565 A CN 201710542565A CN 109199566 B CN109199566 B CN 109199566B
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- inner rod
- pedicle screw
- sleeve
- positioning
- gear
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- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000007704 transition 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
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/92—Impactors or extractors, e.g. for removing intramedullary devices
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- Medical Informatics (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
- Transmission Devices (AREA)
Abstract
The application provides a pedicle screw feeding device which is used for pedicle screws and comprises a sleeve, an inner rod, a locking device and a gear shifting device; the front end of the sleeve is provided with external threads matched with the internal threads of the tail cap of the pedicle screw; the inner rod is inserted into the sleeve, the front end of the inner rod is used for being inserted into the tail cap of the pedicle screw and matched with the pedicle screw, and the rear end of the inner rod is used for being connected with the handle; the rear end of the inner rod is provided with a positioning section with a cross section of a right 12-sided section, the positioning section is provided with at least one gear flange, the diameter of the gear flange is equal to that of the inner rod, and the diameter of an circumscribed circle of the positioning section is smaller than that of the inner rod; the locking device is used for locking the sleeve and the inner rod, and the gear shifting device is used for selecting the function of the locking device.
Description
Technical Field
The application relates to a spinal surgical instrument, in particular to a pedicle screw feeding device.
Background
Pedicle screws are used for installation in spinal procedures at the pedicle locations of the spine. The tail end of the pedicle screw is provided with a tail cap, and the tail cap is internally provided with internal threads. Pedicle screws can be classified into unidirectional nails, multidirectional nails, etc. according to the installation rotation angle, and can be classified into common (short-arm) nails, long-arm nails, etc. according to the length of the U-shaped arm of the tail cap. At present, different pedicle screws are matched with different nailing devices, and the nailing devices are required to be replaced according to different types of screws in the operation process, so that the operation is inconvenient.
The above information disclosed in the background section is only for enhancement of understanding of the background of the application and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art.
Disclosure of Invention
The application aims to overcome the defects of the prior art and provide a pedicle screw feeding device which can be used for various pedicle screws.
Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.
According to one aspect of the present application, a pedicle screw loading device for pedicle screws, comprises: the gear shifting device comprises a sleeve, an inner rod, a locking device and a gear shifting device; the front end of the sleeve is provided with external threads matched with the internal threads of the tail cap of the pedicle screw; the inner rod is inserted into the sleeve, the front end of the inner rod is used for being inserted into the tail cap of the pedicle screw and matched with the pedicle screw, and the rear end of the inner rod is used for being connected with the handle; the inner rod
At least two gear flanges are arranged on the upper part along the length direction of the inner rod, and a positioning section with a polygonal section is arranged on the inner rod positioned behind each gear flange;
a locking device comprising:
the positioning block is fixedly connected with the sleeve and is provided with a through hole and a sliding groove, the through hole is used for the inner rod to pass through, and the sliding groove is perpendicularly intersected with the through hole and penetrates through the positioning block;
the sliding block is arranged in the sliding groove in a sliding manner and is provided with a long hole for the inner rod to pass through, a clamping ring is convexly arranged on the inner wall of the long hole and is provided with an arc part, a polygonal groove part and an empty part, the arc part is matched with the gear flanges and is suitable for being abutted against the rear of each gear flange to block the sliding block from moving forwards relative to the inner rod; the empty part is suitable for the positioning section and the gear flange between two adjacent positioning sections to freely pass through; the polygonal groove part is used for being clamped with the positioning section to limit the relative rotation between the inner rod and the sleeve;
and the gear shifting device is arranged between the positioning block and the sliding block and is used for positioning the sliding block so that the circular arc part, the empty part and the polygonal groove of the clamping ring are respectively matched with the inner rod.
According to one embodiment of the application, the diameter of the circumcircle of the positioning section is smaller than the diameter of the inner rod, and the diameter of the gear flange is equal to the diameter of the inner rod.
According to an embodiment of the present application, the circular arc portion and the polygonal groove portion are provided at both ends of the snap ring, and the empty portion is provided in the middle of the circular arc portion and the polygonal groove.
According to an embodiment of the present application, the cross section of the positioning section is a regular polygon.
According to one embodiment of the application, the gear shifting device comprises three grooves formed in the positioning block, and a spring and steel balls arranged on the sliding block, wherein the spring pushes the steel balls to be clamped into the grooves to position the sliding block when the sliding block slides.
According to one embodiment of the application, two ends of the sliding block are respectively provided with a spring, two ends of the spring are respectively provided with one steel ball, and four grooves respectively used for being matched with one steel ball are formed in the positioning block.
According to one embodiment of the application, the rear end of the sleeve is provided with two opposite external transverse grooves, and one end of the positioning block is provided with a T-shaped groove for connecting with the two external transverse grooves.
According to one embodiment of the application, the sleeve is sleeved with a detachable grab handle and a hand wheel.
According to one embodiment of the application, the inner walls of the two outer transverse grooves are symmetrically provided with two inclined planes inclined inwards by 15 degrees, and the two inclined planes are suitable for enabling the positioning blocks to rotate left and right relative to the sleeve.
According to an embodiment of the present application, the thickness of the polygonal groove portion is smaller than the thickness of the circular arc portion, and both side surfaces of the polygonal groove portion are inwardly offset by 0.5mm with respect to both side surfaces of the circular arc portion.
According to the technical scheme, the application has the advantages and positive effects that:
the pedicle screw loading device can be provided with a plurality of gear flanges, so that the pedicle screw loading device can adapt to pedicle screws of different lengths and types, and has good adaptability. Meanwhile, the device can be disassembled and cleaned conveniently, and the operation can be completed by only one set of pedicle screw feeding device in the operation process. After the pedicle screw is locked, the screw can be prevented from loosening, thereby reliably mounting the screw on the pedicle. In addition, the locking and rotating transformation between the inner rod and the sleeve can be realized on the basis of not increasing the total length, and the structure is simple.
Drawings
The above and other features and advantages of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
FIG. 1 is a schematic view of a pedicle screw loading device according to an embodiment of the application;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a schematic view of the inner rod of FIG. 2;
FIG. 4 is an enlarged view of a portion of FIG. 3 at I;
FIG. 5 is a schematic cross-sectional view of an external cross-slot on the sleeve of FIG. 2;
FIG. 6 is a schematic view of the positioning block of FIG. 2 from another angle;
FIG. 7 is a cross-sectional view of the positioning block of FIG. 2;
FIG. 8 is an enlarged view of a portion of FIG. 7 at II;
FIG. 9 is a schematic view of the slider of FIG. 2;
FIG. 10 is a schematic cross-sectional view of the slider of FIG. 2;
FIG. 11 is a front view of the slider of FIG. 2;
FIG. 12 is a schematic view of a snap ring of the slider of FIG. 11.
In the figure: 1. a sleeve; 11. an external thread; 12. an outer transverse groove; 13. an inclined plane; 14. a grab handle; 15. a hand wheel; 16. an interface; 2. an inner rod; 21. a positioning section; 22. a gear flange; 31. a positioning block; 32. a through hole; 33. a chute; 34. a T-shaped groove; 35. a slide block; 36. a long hole; 37. a clasp; 371. an arc part; 372. an empty part; 373. polygonal groove portions; 41. a groove; 42. a spring; 43. and (5) steel balls.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.
The terms "anterior" and "posterior" as used in the following embodiments refer to the direction of the upper pin, and the end of the upper pin that is connected to the pedicle screw is the anterior end and the end opposite to the anterior end is the posterior end during the surgical procedure.
Referring to fig. 1-12, an embodiment of the present application discloses a pedicle screw driver for use in connection with a pedicle screw that is then installed at the pedicle of a spinal column. The pedicle screw loading device comprises a sleeve 1, an inner rod 2 and a locking device.
The sleeve 1 is an elongated hollow tube, the front end of which is provided with external threads for mating with the internal threads of the tail cap of a pedicle screw. After screwing the front end of the cannula 1 into the tail cap of the pedicle screw, the cannula 1 can be connected with the tail cap. A detachable handle 14 and a hand wheel 15 may be provided on the sleeve 1, and the handle 14 and the hand wheel 15 may be integrated with the sleeve 1.
The inner rod 2 is an elongated rod with a front end configured in the shape of a hexagonal head or the like for adaptation to the tail of a pedicle screw. The inner rod 2 is inserted into the sleeve 1, and the front end of the inner rod 2 is inserted into the tail cap of the pedicle screw and matched with the pedicle screw to drive the pedicle screw to rotate. The rear end of the inner rod 2 is provided with an interface 16 for connecting various handles such as a straight handle or a T-handle. At least two shift flanges 22 are provided on the inner rod 2 along the longitudinal direction of the inner rod 2, and a positioning section 21 having a polygonal cross section is provided on the inner rod behind each of the shift flanges (i.e., in a direction away from the front end of the inner rod 2), and in this embodiment, the cross section of the positioning section 21 is a regular polygon, specifically, a regular 12-sided polygon, but the positioning section 21 may be a polygon of other shapes. As a preferred embodiment, the diameter of the two gear flanges 22 is equal to the diameter of the inner rod 2, and the diameter of the circumcircle of the positioning segment 21 is smaller than the diameter of the inner rod 2.
The locking means for locking the inner rod 2 and the sleeve 1 together comprises a positioning block 31, a slide 35 and a gear shifting means.
Referring to fig. 2 and 6 to 8, the positioning block 31 is fixedly connected to the rear end of the sleeve 1, and the positioning block 31 may be directly welded to the sleeve 1 or may be detachably connected to the sleeve 1. The positioning block 31 has a through hole 32 and a slide groove 33, the through hole 32 is used for the inner rod 2 to pass through, and the slide groove 33 perpendicularly intersects with the through hole 32 and penetrates the positioning block 31. It should be noted that, in the present embodiment, one end of the positioning block 31 is provided with a T-shaped slot 34, and the rear end of the sleeve 1 is provided with two opposite outer transverse slots 12, and the T-shaped slot 34 is connected with the two outer transverse slots 12, so as to axially position the positioning block 31, and then the inner rod 2 is passed through the through hole 32 on the positioning block 31, so as to radially position the positioning block 31. Finally, the positioning block 31 can be fixedly arranged at the rear end of the sleeve 1 through the T-shaped groove 34 and the inner rod 2, and the positioning block 31 can be conveniently detached from the sleeve 1 after the inner rod 2 is pulled out. Alternatively, the diameter of the gear flange 22 may be larger or smaller than the diameter of the inner rod 2, and preferably the diameter of the gear flange 22 is equal to the diameter of the inner rod 2, so that the inner rod can be easily drawn out of the through hole 32, and the disassembly operation is more convenient. Also as an alternative, the plurality of gear steps may be provided differently sized, the recess being adapted to be freely accessible for the positioning segments and the gear steps between two adjacent positioning segments, and the gear steps being provided at the foremost end with a larger size than the recess, in which case a non-detachable structure is formed between the inner rod and the outer sleeve.
It will be appreciated by those skilled in the art that the form of the fixed connection of the positioning block 31 to the sleeve 1 is not limited, and may be, for example, by screws, pins, rivets, etc.
Referring to fig. 2, 9 to 12, a slider 35 is slidably disposed in the slide groove 33 of the positioning block 31. The slide 35 is provided with a slot 36 through which the inner rod 2 can pass. Since the elongated hole 36 extends in the same direction as the sliding direction of the slider 35, the inner rod 2 does not interfere with the slider 35 when the slider 35 slides in the slide groove 33, and thus the slider 35 can be ensured to freely slide.
A snap ring 37 is provided on the inner wall of the long hole 36 in a protruding manner, and the snap ring 37 is formed in a plurality of segments, and includes an arc portion 371 and a polygonal groove portion 373 at both ends of the snap ring 37, respectively, and a hollow portion 372 located between the arc portion 371 and the polygonal groove portion 373. In fig. 12, the shape of the snap ring 37 is indicated by a black area.
The radius of the arc portion 371 is smaller than the diameter of the gear flange 22, when the slider 35 slides to the first position, the arc portion 371 approaches the positioning segment 21, and at this time, since the projection of the arc portion 371 in the axial direction of the inner rod 2 coincides with the projection portions of the outer edges of the inner rod 2 and the gear flange 22, the arc portion 371 can cooperate with the gear flange 22 and the end surfaces of the two ends of the positioning segment 21 to limit the inner rod 2, and the inner rod 2 can be prevented from falling out of the sleeve 1.
The width of the hollow portion 372 is equal to or greater than the diameter of the gear flange 22, and when the slider 35 is moved to the second position, the hollow portion 372 is engaged with the inner rod 2, and the positioning section 21 of the inner rod 2 and the gear flange 22 can pass through the hollow portion 372 freely, that is, when the diameter of the gear flange 22 is equal to the diameter of the inner rod 2, the inner rod 2 can be smoothly pulled out of the sleeve 1 without obstruction. As shown in fig. 12, the width of the hollow 372 may be the same as the width of the long hole 36, and the hollow is formed by a part of the inside of the long hole 36. In addition, when the width of the long hole 36 is large, the hollow portion 372 may protrude from the inner wall of the long hole 36.
The polygonal groove 373 has a contour shape matching that of the positive 12-sided polygon of the positioning section 21, and has two opposite planar ends between which the width is equal to the width between any two opposite planar surfaces of the positive 12-sided polygon of the positioning section 21. When the slider 35 moves to the third position, the polygonal groove 373 engages with the positioning section 21, and the relative rotation between the inner rod 2 and the sleeve 1 can be restricted. Arc transitions are provided between the arc portion 371, the empty portion 372, and the polygonal groove portion 373 to avoid sharp corners.
The gear shifting device is disposed between the positioning block 31 and the sliding block 35, and is used for positioning the sliding block 35 at the first position, the second position and the third position, so that the circular arc portion, the empty portion and the polygonal groove portion of the snap ring can be respectively matched with the inner rod. In the present embodiment, the gear shifting device includes three grooves 41 provided on the positioning block 31, and springs 42 and steel balls 43 provided on the slide block 35, the positions of the three grooves 41 correspond to the predetermined stay positions of the slide block 35, and when the slide block 35 slides, the springs 42 can push the steel balls 43 to be snapped into the three grooves 41 to position the slide block. Among the three grooves 41 arranged in the middle, the depth of the groove is shallower than the other two, so that the hand feeling of the groove is lighter during gear shifting, thereby prompting the user of the gear in which the slider 35 is located.
The recess 41, the spring 42 and the steel ball 43 may be provided in plurality to improve the gear-shifting accuracy. In this embodiment, two through holes are respectively provided at two ends of the slider 35, a spring 42 is respectively provided in each through hole, two steel balls 43 are respectively provided at two ends of the spring 42, and four sets of grooves for being matched with one of the steel balls are respectively provided on the positioning block 31.
Referring to fig. 5, two inclined planes 13 inclined inward by 15 ° are symmetrically arranged on the inner walls of the two outer transverse grooves 12, and the two inclined planes 13 can enable the positioning block 31 to rotate left and right relative to the sleeve 1. By providing the inclined surface 13, the positioning block 31 can slightly rotate relative to the sleeve 1, and when the positioning block 31 rotates, the slide block 35 can also rotate relative to the inner rod 2, so that the problem that the positioning segment 21 cannot be aligned with the polygonal groove 373 and cannot be attached to the polygonal groove 373 can be avoided.
Further, the thickness of the polygonal groove portion 373 may be smaller than that of the circular arc portion 371, and both side surfaces of the polygonal groove portion 373 are inwardly offset from both side surfaces of the circular arc portion 371 by 0.5mm.
The following describes the method of using the pedicle screw loading device.
The steel ball 43 can be adjusted to be positioned in the groove in the middle in the initial state, at the moment, the slide block 35 is positioned in the second position, the inner rod 2 can freely slide in the empty part 372 of the clamp ring 37, and an operator can select to place the clamp ring of the slide block 35 behind the corresponding gear flange 22 according to the tail cap arm length of the pedicle screw.
At this time, the slider 35 is moved to the first position, and the arc portion 371 of the snap ring 37 approaches the positioning segment 21. After the sliding block 35 is shifted to the first position, the inner rod is inserted into the tail cap of the pedicle screw and is inserted into the hexagonal hole at the tail end of the pedicle screw body to form interference, and at the moment, the sleeve is rotated to screw the external thread of the sleeve 1 into the internal thread of the tail cap of the pedicle screw. Since the arc portion 371 abuts against the gear flange 22 at the rear of the gear flange 22 at this time, the screwing of the sleeve is limited, and the sleeve moves forward with respect to the inner rod as the sleeve is screwed, and when the arc portion 371 moves to the rear of the gear flange 22 and abuts against the gear flange 22, the gear flange limits the sleeve 1 and prevents further forward movement, thereby preventing the problem of the sleeve being screwed too deeply. Since the gear flange 22 is provided along the length direction of the inner rod 2, when the slider is mounted behind different gear flanges 22 in the initial state, eventually when the arc 371 collides with the gear flange 22, the front end of the inner rod extends out of the sleeve 1 by a different length, which is matched with the length of the U-arm of the tail cap of the different pedicle screw. Taking two gear flanges 22 in fig. 3 as an example, when the arc portion 371 of the snap ring 37 collides with the gear flange located at the front, the front end of the inner rod extends out of the sleeve 1 to a shorter length, which can be applied to short-arm nails, i.e. pedicle screws with shorter U-shaped arms; when the arc portion 371 of the snap ring 37 abuts against the rear gear flange, the front end of the inner rod extends out of the sleeve 1 to a longer length, and the sleeve can be applied to long-arm nails, namely pedicle screws with longer U-shaped arms.
After the external thread of the sleeve 1 is screwed into the internal thread of the tail cap of the pedicle screw, the sliding block 35 is shifted to a third position, the polygonal groove 373 of the clamping ring 37 is clamped on the positioning section 21, the inner rod 2 and the sleeve 1 are fixed into a whole, the pedicle screw is placed on the pedicle, the handle arranged at the rear section of the inner rod is used for rotating the inner rod, and the sleeve 1 is driven to synchronously rotate. After installation, the slide 35 is moved to the first position, the sleeve 1 is rotated in the opposite direction, and the sleeve 1 and the pedicle screw are separated.
Since the thickness of the polygonal groove portion 373 may be smaller than that of the circular arc portion 371, both side surfaces of the polygonal groove portion 373 are inwardly offset by 0.5mm with respect to both side surfaces of the circular arc portion 371. Thus, the present nailing device is prevented from retreating and the polygonal groove 373 is prevented from being pushed against the gear flange 22 during gear shifting.
The pedicle screw loading device can be provided with a plurality of gear flanges, so that the pedicle screw loading device can adapt to pedicle screws of different lengths and types, and has good adaptability. If only one pedicle screw is used during the procedure, only one stop flange is provided on the inner rod, and if multiple pedicle screws are used during the procedure, an inner rod with multiple stop flanges is selected that fits with these pedicle screws. Meanwhile, the device can be disassembled and cleaned conveniently, and the operation can be completed by only one set of pedicle screw feeding device in the operation process. After the pedicle screw is locked, the screw can be prevented from loosening, thereby reliably mounting the screw on the pedicle. In addition, the locking and rotating transformation between the inner rod and the sleeve can be realized on the basis of not increasing the total length, and the structure is simple.
The exemplary embodiments of the present application have been particularly shown and described above. It is to be understood that the application is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (10)
1. A pedicle screw loading device for pedicle screws, comprising:
the front end of the sleeve is provided with external threads matched with the internal threads of the tail cap of the pedicle screw;
the inner rod is inserted into the sleeve, the front end of the inner rod is used for being inserted into the tail cap of the pedicle screw and matched with the pedicle screw, and the rear end of the inner rod is used for being connected with the handle; at least two gear flanges are arranged on the inner rod along the length direction of the inner rod, and a positioning section with a polygonal section is arranged on the inner rod positioned behind each gear flange;
a locking device comprising:
the positioning block is fixedly connected with the sleeve and is provided with a through hole and a sliding groove, the through hole is used for the inner rod to pass through, and the sliding groove is perpendicularly intersected with the through hole and penetrates through the positioning block;
the sliding block is arranged in the sliding groove in a sliding manner and is provided with a long hole for the inner rod to pass through, a clamping ring is convexly arranged on the inner wall of the long hole and is provided with an arc part, a polygonal groove part and an empty part, the arc part is matched with the gear flanges and is suitable for being abutted against the rear of each gear flange to block the sliding block from moving forwards relative to the inner rod; the empty part is suitable for the positioning section and the gear flange between two adjacent positioning sections to freely pass through; the polygonal groove part is used for being clamped with the positioning section to limit the relative rotation between the inner rod and the sleeve;
and the gear shifting device is arranged between the positioning block and the sliding block and is used for positioning the sliding block so that the circular arc part, the empty part and the polygonal groove of the clamping ring are respectively matched with the inner rod.
2. The pedicle screw driver as claimed in claim 1, wherein the diameter of the circumcircle of the locating section is smaller than the diameter of the inner rod, the diameter of the stop flange being equal to the diameter of the inner rod.
3. The pedicle screw driver as claimed in claim 1 or 2, wherein the circular arc portion and the polygonal groove portion are provided at both ends of the snap ring, and the free portion is provided in the middle of the circular arc portion and the polygonal groove.
4. The pedicle screw driver as claimed in claim 1, wherein the positioning section is of regular polygonal cross-section.
5. The pedicle screw driver as claimed in claim 1, wherein the shifting means comprises three grooves provided on the positioning block, and a spring and a steel ball provided on the slider, the spring pushing the steel ball to snap into the grooves to position the slider when the slider is slid.
6. The pedicle screw loading device of claim 5, wherein two ends of the slider are respectively provided with a spring, two ends of the spring are respectively provided with one steel ball, and four grooves respectively used for being matched with one steel ball are formed in the positioning block.
7. The pedicle screw driver as claimed in claim 1, wherein the rear end of the sleeve is provided with two opposite external transverse grooves, one of the positioning blocks being provided with a T-shaped groove for connection with both of the external transverse grooves.
8. The pedicle screw driver as claimed in claim 4, wherein the sleeve is provided with a detachable handle and hand wheel.
9. The pedicle screw driver as claimed in claim 7, wherein the inner walls of both of said outer transverse grooves are symmetrically provided with two inwardly inclined surfaces of 15 ° adapted to allow left and right rotation of said positioning block relative to said sleeve.
10. The pedicle screw driver as claimed in claim 1, wherein the thickness of the polygonal slot portion is smaller than the thickness of the circular arc portion, and both side surfaces of the polygonal slot portion are offset inwardly by 0.5mm with respect to both side surfaces of the circular arc portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710542565.6A CN109199566B (en) | 2017-07-05 | 2017-07-05 | Pedicle screw feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710542565.6A CN109199566B (en) | 2017-07-05 | 2017-07-05 | Pedicle screw feeding device |
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| Publication Number | Publication Date |
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| CN109199566A CN109199566A (en) | 2019-01-15 |
| CN109199566B true CN109199566B (en) | 2023-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710542565.6A Active CN109199566B (en) | 2017-07-05 | 2017-07-05 | Pedicle screw feeding device |
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| CN (1) | CN109199566B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111012472A (en) * | 2019-12-31 | 2020-04-17 | 浙江康慈医疗科技有限公司 | A go up nail spanner when being used for multiaxis pedicle of vertebral arch screw to implant |
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| CN207886273U (en) * | 2017-07-05 | 2018-09-21 | 北京纳通医学科技研究院有限公司 | Pedicle of vertebral arch screw nails on nail device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6709439B2 (en) * | 2001-10-30 | 2004-03-23 | Depuy Spine, Inc. | Slaphammer tool |
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| US5171313A (en) * | 1991-05-08 | 1992-12-15 | Othy, Inc. | Tool driver |
| CN102379738A (en) * | 2011-09-19 | 2012-03-21 | 苏州欣荣博尔特医疗器械有限公司 | Spinal screw nailing device |
| CN202960747U (en) * | 2012-11-08 | 2013-06-05 | 天津正天医疗器械有限公司 | Pedicle screw nailing device |
| WO2014091454A1 (en) * | 2012-12-14 | 2014-06-19 | Stryker Global Technology Center | Universal impactor with slap hammer |
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| CN109199566A (en) | 2019-01-15 |
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Address after: G356, 3rd floor, building 1, yard 9, CHENGWAN street, Haidian District, Beijing 100094 Patentee after: Beijing natong Medical Technology Holding Co.,Ltd. Patentee after: BEIJING NATON TECHNOLOGY GROUP Co.,Ltd. Address before: 100095 3, 2 floor, 2 building, 103 Beiqing Road, Haidian District, Beijing. Patentee before: BEIJING NATON INSTITUTE OF MEDICAL TECHNOLOGY Co.,Ltd. Patentee before: BEIJING NATON TECHNOLOGY GROUP Co.,Ltd. |