CN213283292U - Anterior cervical fixing device - Google Patents
Anterior cervical fixing device Download PDFInfo
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- CN213283292U CN213283292U CN202021830249.2U CN202021830249U CN213283292U CN 213283292 U CN213283292 U CN 213283292U CN 202021830249 U CN202021830249 U CN 202021830249U CN 213283292 U CN213283292 U CN 213283292U
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- steel plate
- cervical vertebra
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Abstract
The embodiment of the utility model provides a cervical vertebra anterior fixing device is related to, include: a cervical vertebra steel plate; the screw holes are positioned on the cervical vertebra steel plate, each group of screw holes comprises two symmetrically arranged screw holes, and each screw hole is provided with a clamping groove; the locking block seats are positioned on the cervical vertebra steel plate, one locking block seat is correspondingly arranged in the middle of each group of screw holes, and each locking block seat is provided with a groove; the groove of each locking block seat is communicated with two clamping grooves of a group of screw holes corresponding to the locking block seat; the locking block comprises locking positions and locking caps, each locking block seat corresponds to one locking block, when the locking positions of the locking blocks are locked in the locking block seats, the locking caps are accommodated in the grooves of the locking block seats, and the locking caps abut against the screw caps of two screws screwed in a group of screw hole positions corresponding to the locking block seats; the perspective window is positioned on the cervical vertebra steel plate; the embodiment of the utility model provides a cervical vertebra anterior fixing device can prevent effectively that the screw is not hard up or remove, and locking is reliable, stable.
Description
Technical Field
The utility model relates to the field of medical equipment, especially, relate to an anterior cervical fixing device.
Background
The internal fixation of the anterior cervical steel plate is a better method for stabilizing the cervical vertebra in the anterior cervical operation, and can firmly fix bone grafting blocks, promote fusion, effectively maintain the natural physiological curvature of the diseased cervical vertebra and recover the normal physiological function of the cervical vertebra.
The anterior cervical vertebra fixing device of clinical use at present adopts a locking device of riveting on the steel sheet, and this locking device is movable design, and along with human motion, locking device can take place to rotate, appears that the screw is not hard up and even drops, leads to the internal fixation to fail, has the potential safety hazard.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a cervical vertebra front fixing device realizes the locking of screw through the latch segment, and the latch segment can be auto-locked with the setting on the cervical vertebra steel sheet with the latch segment seat simultaneously to realized the locking of latch segment and cervical vertebra steel sheet, can prevent effectively that the screw is not hard up or remove, lock reliably, stably.
In order to achieve the above object, the utility model provides an anterior cervical fixing device, anterior cervical fixing device includes:
a cervical vertebra steel plate;
the screw holes are positioned on the cervical vertebra steel plate, each group of screw holes comprises two symmetrically arranged screw holes, and each screw hole is provided with a clamping groove; when a screw penetrates through the screw hole and is screwed into the fixing position, the nut of the screw is accommodated in the clamping groove of the screw hole; the axial directions of the screws screwed in each group of screw holes are parallel or form a preset angle;
the locking block seats are positioned on the cervical vertebra steel plate, one locking block seat is correspondingly arranged in the middle of each group of screw holes, and each locking block seat is provided with a groove; the groove of each locking block seat is communicated with two clamping grooves of a group of screw holes corresponding to the locking block seat;
the locking blocks comprise locking positions and locking caps, each locking block seat corresponds to one locking block, when the locking positions of the locking blocks are locked in the locking block seats, the locking caps are accommodated in the grooves of the locking block seats, and the locking caps abut against the screw caps of two screws screwed in a group of screw hole positions corresponding to the locking block seats to fixedly arrange the screws in the corresponding screw holes;
and the perspective window is positioned on the cervical vertebra steel plate, positioned between the adjacent locking blocks and used for determining the position of the fixed position where the cervical vertebra steel plate is implanted.
Preferably, the inner surface of the cervical vertebra steel plate is arc-shaped.
Preferably, the plurality of groups of screw holes are three groups; the number of the locking blocks is three.
Preferably, the locking block seat is also provided with an internal thread.
Further preferably, the upper surface of the locking cap is provided with a quincunx mounting hole; the locking position is provided with an external thread matched with the internal thread of the locking block seat; the edge of the locking cap is provided with a pair of notch structures for unlocking or locking two screws screwed in a group of screw hole positions corresponding to the locking block seat.
Preferably, the perspective window is in a round-corner rectangular shape, and the top end of the perspective window is a conical surface.
Preferably, the anterior cervical fixation device further comprises a first screw having a nut with a boss; and the outer diameter of the first screw is matched with the aperture of the screw hole.
Preferably, the anterior cervical fixation device further comprises a second screw having a nut with a boss; and the outer diameter of the second screw is smaller than the bore diameter of the screw hole.
Further preferably, the head of the first screw is spherical or conical.
Further preferably, the head of the second screw is spherical or conical.
The embodiment of the utility model provides a pair of anterior cervical spine fixing device, moreover, the steam generator is simple in structure, after the screw wears to establish screw hole spiral shell income fixed position, locking block through rotating locking block seat in, make the locking cap of locking block support the top on the nut of screw, realize the locking to the screw, and simultaneously, the auto-lock is realized with the locking block seat that sets up on the cervical vertebra steel sheet to the locking block, and then the locking of locking block with the cervical vertebra steel sheet has been realized, thereby avoided cervical vertebra steel sheet and screw and fixed position fixed back, not hard up or removal phenomenon appears in the screw, locking is reliable, and is stable, and is easy and simple to handle.
Drawings
Fig. 1 is a schematic view of a cervical vertebra steel plate and a locking block to be assembled according to an embodiment of the present invention;
fig. 2 is a schematic view of the assembly of the cervical vertebra steel plate and the locking block provided by the embodiment of the utility model;
fig. 3 is a schematic perspective view of an anterior cervical fixing device according to an embodiment of the present invention;
fig. 4 is a second schematic perspective view of the anterior cervical fixing device according to the embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
The anterior cervical fixing device provided by the embodiment can be used in an internal cervical fixing system.
Fig. 1 is a schematic view of a cervical vertebra steel plate and a locking block to be assembled according to an embodiment of the present invention; fig. 2 is the schematic view of the assembly of the cervical vertebra steel plate and the locking block provided by the embodiment of the utility model. With reference to fig. 1 and 2, an embodiment of the present invention provides an anterior cervical fixing device, including: a cervical vertebra steel plate 1 and a plurality of locking blocks 2.
The inner surface of the cervical vertebra steel plate 1 is in an arc design, and the edge of the cervical vertebra steel plate is in a wave design, so that the cervical vertebra steel plate 1 can better accord with the physiological bending structure of human skeleton, and when a fixed part is implanted, the mechanical damage to surrounding soft tissues can be avoided.
The cervical vertebra steel plate 1 is provided with a plurality of screw holes 11 and a plurality of locking block seats 12.
The plurality of screw holes 11, in a specific example, the plurality of sets are 3 sets, and it should be noted that 3 sets of specific numerals herein are only for illustration and are not used to limit the protection scope of the present invention, and may be determined according to different requirements, for example, 4 sets and 6 sets of screw holes may be set according to clinical use requirements and the design length of the cervical vertebra steel plate. Each set of screw holes 11 comprises two screw holes 11 arranged symmetrically. The screw hole 11 has a catching groove 111. Fig. 3 is a schematic perspective view of an anterior cervical fixing device according to an embodiment of the present invention. Referring to fig. 3, after the screw 3 is inserted through the screw hole 11 and screwed into a fixing position (not shown), the nut 30 of the screw 3 is accommodated in the slot 111 of the screw hole 11; each set of screw holes 11 is axially parallel or at a predetermined angle so that the axial direction of the screwed screws 3 is parallel or at a predetermined angle.
Fig. 4 is a second schematic perspective view of the anterior cervical fixing device according to the embodiment of the present invention. As shown in fig. 4, the anterior cervical fixing device further includes a first screw and a second screw, so that different screws can be selected and used for fixing according to different situations. The nut of the first screw has a boss (not shown in the figures); and the outer diameter of the first screw is matched with the aperture of the screw hole 11, so that the angle between the first screw and the screw hole 11 is not adjustable. In an alternative arrangement, the head of the first screw is spherical or conical, and in a specific example, as shown in fig. 4, the spherical head screw is an non-adjustable angle self-tapping screw 31 and the conical head screw is a non-adjustable angle self-drilling screw 32.
The nut of the second screw has a boss (not shown in the figures); and the outer diameter of the second screw is smaller than the aperture of the screw hole 11, so as to adjust the angle between the second screw and the screw hole 11, and thus adjust the angle between the second screw and the fixing position. In an alternative embodiment, the head of the second screw is spherical or conical, and in a specific example, as shown in fig. 4, the spherical head screw is an adjustable angle self-tapping screw 33 and the conical head screw is an adjustable angle self-drilling screw 34.
The screw 3 is locked mainly by the locking block 12. The middle position of each group of screw holes 11 is correspondingly provided with a locking block seat 12. The number of the locking block seats 12 is determined according to the number of the screw holes 11, and in the present embodiment, the number of the locking block seats 12 is 3. The locking block seat 12 has a recess 121 for the fixing of the locking block 2. The groove 121 of each locking block seat 12 is communicated with the two slots 111 of the set of screw holes 11 corresponding to the locking block seat 12. In a preferred embodiment, the locking block holder 12 also has internal threads 122.
Each locking block seat 12 corresponds to one locking block 2, each locking block 2 comprises a locking position 21 and a locking cap 22, when the locking position 21 of each locking block 2 is locked in the corresponding locking block seat 12, the locking cap 22 is accommodated in the groove 121 of the locking block seat 12, and the locking cap 22 abuts against the nuts 30 of two screws 3 screwed in a group of screw holes 11 corresponding to the locking block seats 12 to fixedly fix the screws 3 in the corresponding screw holes 11. In a preferred embodiment, the upper surface of the locking cap 22 has a quincunx mounting hole 221; the quincunx mounting hole 221 is used for inserting a special quincunx screwdriver to screw the locking block 2 so that the locking block 2 can compress the nut 30. The locking site 21 has external threads 211 that mate with the internal threads 122 of the locking block holder 12. The external thread 211 on the locking position 21 is matched with the internal thread 122 of the locking block seat 12, so that the locking block 2 and the locking block seat 12 realize self-locking, the locking block 2 and the cervical vertebra steel plate 1 realize locking, the phenomenon that the screw 3 is loosened or moved after the cervical vertebra steel plate 1 and the screw 3 are fixed with a fixing position can be effectively prevented, and the locking is reliable, stable and simple and convenient to operate. In another preferred embodiment, the edge of the locking cap 22 has a pair of notch structures 222, and the design of the notch structures 222 facilitates the locking or unlocking of the locking block 2 to the corresponding two screws 3.
As shown in fig. 2, the cervical vertebrae plate 1 of the present invention further has a transparent window 13.
Specifically, the perspective window 13 is located between two adjacent locking block seats 12, and is used for confirming the position of the cervical vertebra steel plate 1 in the implantation fixing position. In this embodiment, the perspective window 13 is specifically a rounded rectangle, the top end of the perspective window 13 is designed to be a conical surface 131, and the number of the perspective windows 13 is specifically two, so that the bone grafting position can be conveniently observed in the operation.
The above is to introduce each component of the anterior cervical fixing device and the connection relationship between them provided by the embodiments of the present invention, and the following detailed description is made on the using mode of the anterior cervical fixing device with reference to fig. 2, fig. 3 and fig. 4:
firstly, the cervical vertebra steel plate 1 is attached to the vertebral body, the position of bone grafting and the relative position of the cervical vertebra steel plate 1 are observed through the perspective window 13, so that the fixed positions of the cervical vertebra steel plate 1 and the vertebral body are aligned, and the installation position of the cervical vertebra steel plate 1 is determined. The selected screw 3 is inserted through the screw hole 11 by the special screwdriver and is axially parallel or screwed into the fixing position of the vertebral body at different preset angles until the nut 30 of the screw 3 is accommodated in the clamping groove of the screw hole 11, so that the damage of the edge of the nut 30 of the screw 3 to surrounding tissues can be prevented. Then, the locking block 2 is placed in the groove 121 of the locking block seat 12, the locking cap 22 of the locking block 2 is screwed by a special quincunx screwdriver, the external thread 211 on the locking position 21 is meshed with the internal thread 122 of the locking block seat 12 along with the downward pressing of the screwdriver on the locking cap 22, so that the locking block 2 and the locking block seat 12 realize self-locking, meanwhile, the locking cap 22 is abutted against the upper surface of the nut 30 of the adjacent group of screws 3, so that the screws 3 are fixedly arranged in the corresponding screw holes 11, the phenomenon that the screws 3 are loosened or moved after the cervical vertebra steel plate 1 and the screws 3 are fixed with a fixed position can be effectively prevented, and the cervical vertebra steel plate 1 is locked on the fixed position.
The embodiment of the utility model provides a pair of anterior cervical spine fixing device, moreover, the steam generator is simple in structure, after the screw wears to establish screw hole screw-in clamping position, locking block through rotating locking block seat in, make the locking cap of locking block support the top on the nut of screw, realize the function of two screws of a locking block locking, and simultaneously, the auto-lock is realized with the locking block seat that sets up on the cervical vertebra steel sheet to the locking of locking block and cervical vertebra steel sheet, thereby avoided cervical vertebra steel sheet and screw and fixed position fixed back, not hard up or removal phenomenon appears in the screw, locking is reliable, and is stable, and is easy and simple to handle.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An anterior cervical fixation device, comprising:
a cervical vertebra steel plate;
the screw holes are positioned on the cervical vertebra steel plate, each group of screw holes comprises two symmetrically arranged screw holes, and each screw hole is provided with a clamping groove; when a screw penetrates through the screw hole and is screwed into the fixing position, the nut of the screw is accommodated in the clamping groove of the screw hole; each group of screw holes are axially parallel or form a preset angle;
the locking block seats are positioned on the cervical vertebra steel plate, one locking block seat is correspondingly arranged in the middle of each group of screw holes, and each locking block seat is provided with a groove; the groove of each locking block seat is communicated with two clamping grooves of a group of screw holes corresponding to the locking block seat;
the locking blocks comprise locking positions and locking caps, each locking block seat corresponds to one locking block, when the locking positions of the locking blocks are locked in the locking block seats, the locking caps are accommodated in the grooves of the locking block seats, and the locking caps abut against the screw caps of two screws screwed in a group of screw hole positions corresponding to the locking block seats to fixedly arrange the screws in the corresponding screw holes;
and the perspective window is positioned on the cervical vertebra steel plate, positioned between the adjacent locking blocks and used for determining the position of the fixed position where the cervical vertebra steel plate is implanted.
2. The anterior cervical fixation device of claim 1, wherein the inner surface of the cervical steel plate is curved.
3. Anterior cervical fixation device according to claim 1, characterized in that said plurality of sets of screw holes, in particular three sets; the number of the locking blocks is three.
4. The anterior cervical fixation device of claim 1, wherein the locking block seat is further internally threaded.
5. The anterior cervical fixation device of claim 4, wherein the locking cap has a quincunx mounting hole on its upper surface; the locking position is provided with an external thread matched with the internal thread of the locking block seat; the edge of the locking cap is provided with a pair of notch structures for unlocking or locking two screws screwed in a group of screw hole positions corresponding to the locking block seat.
6. The anterior cervical fixation device of claim 1, wherein the see-through window has a rounded rectangular shape and the top end of the see-through window has a tapered surface.
7. The anterior cervical fixation device of claim 1, further comprising a first screw having a nut with a boss; and the outer diameter of the first screw is matched with the aperture of the screw hole.
8. The anterior cervical fixation device of claim 1, further comprising a second screw having a nut with a boss; and the outer diameter of the second screw is smaller than the bore diameter of the screw hole.
9. The anterior cervical fixation device of claim 7, wherein the head of the first screw is spherical or conical.
10. The anterior cervical fixation device of claim 8, wherein the head of the second screw is spherical or conical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021830249.2U CN213283292U (en) | 2020-08-27 | 2020-08-27 | Anterior cervical fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021830249.2U CN213283292U (en) | 2020-08-27 | 2020-08-27 | Anterior cervical fixing device |
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| Publication Number | Publication Date |
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| CN213283292U true CN213283292U (en) | 2021-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021830249.2U Active CN213283292U (en) | 2020-08-27 | 2020-08-27 | Anterior cervical fixing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113576635A (en) * | 2021-06-16 | 2021-11-02 | 四川维思达医疗器械有限公司 | Anterior cervical fixing structure |
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2020
- 2020-08-27 CN CN202021830249.2U patent/CN213283292U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113576635A (en) * | 2021-06-16 | 2021-11-02 | 四川维思达医疗器械有限公司 | Anterior cervical fixing structure |
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