CN217014182U - Cervical vertebra posterior approach door opening plate - Google Patents
Cervical vertebra posterior approach door opening plate Download PDFInfo
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- CN217014182U CN217014182U CN202120457419.5U CN202120457419U CN217014182U CN 217014182 U CN217014182 U CN 217014182U CN 202120457419 U CN202120457419 U CN 202120457419U CN 217014182 U CN217014182 U CN 217014182U
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Abstract
The utility model discloses a cervical vertebra posterior approach door opening plate, which belongs to the technical field of orthopedic implants and comprises an upper fixing plate, a vertebral plate door opening supporting plate and a lower fixing plate which are sequentially connected, wherein a first bone screw mounting hole is formed in the upper fixing plate, a second bone screw mounting hole is formed in the lower fixing plate, a first supporting foot extending transversely is arranged on the inner side of the middle part of the vertebral plate door opening supporting plate, a second supporting foot extending vertically is arranged on the inner side of the joint of the vertebral plate door opening supporting plate and the lower fixing plate, and an included angle between the second supporting foot and the lower fixing plate is an obtuse angle. The utility model can effectively prevent the reduction of the door closing or opening angle after the operation, keep the expansion effect of the vertebral canal and realize the effective decompression inside the vertebral canal; the included angle between second arm-brace and the bottom plate designs for the obtuse angle, just can play the fixed action through the combination of second arm-brace and vertebral plate screw, can greatly reduced to the requirement of doctor osteotomy angle, and fixed firm, facilitates the use.
Description
Technical Field
The utility model relates to the technical field of orthopedic implants, in particular to a cervical vertebra posterior approach opening door plate.
Background
The posterior cervical spine single-door spinal canal enlarging plasty is the main method for treating multi-segment spinal cord type spondylopathy, cervical canal stenosis and multi-segment posterior longitudinal ligament ossification, and is characterized in that one side of a vertebral plate is cut through a surgical operation, and a miniature door-opening titanium plate is implanted to enable the vertebral plate to move backwards and outwards so as to enlarge the vertebral canal. The micro door-opening titanium plate forms a stable bridging structure between the lifted vertebral plate and the lateral block on the same side, can form true rigid support on the door-opening side, maintains the position of the post-operation spinal structure fixed in the operation, and realizes immediate stability. The micro door-opening titanium plate can effectively prevent the door from being closed or the door-opening angle from being reduced after the operation, can also improve the stability of the door shaft side, is favorable for the bone healing of the door shaft side, and prevents the physiological curvature of the cervical vertebra from being further lost.
The inventor finds in the research process that the design of the micro door-opening titanium plate in the prior art has high requirements on the osteotomy angle of the opening of the vertebral body and is not firm in fixation.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a cervical vertebra posterior approach opening door plate which is low in requirement on osteotomy angle and firm in fixation.
In order to solve the technical problems, the utility model provides the following technical scheme:
the utility model provides a way door plant opens behind cervical vertebra, includes the upper fixed plate, the vertebral plate that connect gradually and opens door backup pad and bottom plate, be equipped with first bone screw mounting hole on the upper fixed plate, be equipped with second bone screw mounting hole on the bottom plate, the vertebral plate opens door backup pad middle part inboard and is equipped with the first spike of horizontal extension, the vertebral plate opens door backup pad and bottom plate junction inboard is equipped with the second spike of vertical extension, contained angle between second spike and the bottom plate is the obtuse angle.
Further, the second bone screw mounting holes are at least one pair and are arranged side by side vertically or transversely.
Further, the first bone screw mounting holes are a pair and are arranged laterally side by side.
Further, be equipped with the first vertebral plate screw that is used for fixed vertebral plate to open the door department and goes up the vertebral plate in the first bone screw mounting hole, be equipped with the second vertebral plate screw that is used for fixed vertebral plate to open the door department and lower vertebral plate in the second bone screw mounting hole, the terminal surface is spherical structure under the pin fin of first vertebral plate screw and second vertebral plate screw, first bone screw mounting hole and second bone screw mounting hole be with spherical structure matched with ball-type groove structure.
Further, the first bone screw mounting hole and the second bone screw mounting hole are both counter-sunk holes without internal threads.
Further, the transverse length of the first supporting foot is 0.5-2 mm.
Further, the vertebral plate door opening support plate comprises a first arc-shaped plate connected with the upper fixing plate and a second arc-shaped plate connected with the lower fixing plate, wherein:
the first supporting foot is positioned at the inner side of the joint of the first arc-shaped plate and the second arc-shaped plate;
the first arc-shaped plate is designed to have a vertical radian, and the upper fixing plate, the first arc-shaped plate and the first supporting leg form a clamping groove for accommodating an open end of an upper vertebral plate at the opening position of the vertebral plate;
the second arc is designed to have a transverse radian, and the connecting end of the second arc and the first arc is higher than the connecting end of the second arc and the lower fixing plate.
Further, the first arc-shaped plate is an arc with the radius of 2.5-5mm and/or the second arc-shaped plate is an arc with the radius of 5-13.5 mm.
Furthermore, the first arc-shaped plate and the second arc-shaped plate are in tangent connection, and/or the height difference between the first supporting leg and the lower fixing plate is 3-7mm, and/or a transverse step is arranged on the inner side of the clamping groove.
Furthermore, the upper fixing plate, the vertebral plate door opening supporting plate and the lower fixing plate are all titanium plates, and the thickness of each titanium plate is 0.4-1 mm.
The utility model has the following beneficial effects:
according to the cervical vertebra posterior approach opening door plate, the first supporting leg extending transversely is arranged on the inner side of the middle part of the vertebral plate opening supporting plate, and the second supporting leg extending vertically is arranged on the inner side of the joint of the vertebral plate opening supporting plate and the lower fixing plate, so that powerful support is provided, the phenomenon that the door is closed or the door opening angle is reduced after a surgery can be effectively prevented, the expansion effect of a vertebral canal is kept, and effective decompression in the vertebral canal is realized; the included angle between second arm-brace and the bottom plate is the obtuse angle, adopts the obtuse angle design like this, just can play the fixed action through the combination of second arm-brace and vertebral plate screw, can greatly reduced to the requirement of doctor osteotomy angle, and fixed firm, facilitate the use.
In addition, the cervical vertebra posterior approach door opening plate/micro door opening titanium plate technology can also effectively reduce the incidence rate of axial symptoms, and the reasons are as follows: 1. the technology avoids the interference and the damage to the posterior cervical nerve branch when the small joint capsule is sutured and fixed by the suture and aseptic inflammation caused by the relative traction of the joint capsule, and reduces the interference to the small joint capsule to a lower limit; 2. the micro titanium plate has low incisional marks, and can prevent the inflammatory symptoms caused by the stimulation of surrounding tissues; 3. the technique is fixed firm, and the patient can carry out the function exercise in early stage, prevents neck muscle atrophy and tissue adhesion, effectively maintains the normal physiology lordosis of cervical vertebra, improves cervical vertebra activity, reduces owing to wear the uncomfortable sense that the neck brace arouses for a long time.
Drawings
FIG. 1 is a three-dimensional structure view of the opening door panel for cervical vertebra posterior approach of the present invention;
FIG. 2 is a front view of the cervical posterior approach opening door panel of FIG. 1;
FIG. 3 is a state view of the opening plate for cervical vertebra posterior approach shown in FIG. 1;
fig. 4 is a schematic view of an improved inner side structure of a slot formed by the upper fixing plate, the first arc-shaped plate and the first supporting leg in fig. 1.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The utility model provides a cervical vertebra posterior approach door opening plate, which comprises an upper fixing plate 1, a vertebral plate door opening supporting plate 2 and a lower fixing plate 3 which are sequentially connected, wherein a first bone screw mounting hole is formed in the upper fixing plate 1, a second bone screw mounting hole is formed in the lower fixing plate 3, a first supporting leg 4 which extends transversely is arranged on the inner side of the middle part of the vertebral plate door opening supporting plate 2, a second supporting leg 5 which extends vertically is arranged on the inner side of the joint of the vertebral plate door opening supporting plate 2 and the lower fixing plate 3, and an included angle between the second supporting leg 5 and the lower fixing plate 3 is an obtuse angle, and the specific angle can be determined according to actual needs, for example, can be 100 degrees and 120 degrees.
The inner side of the utility model is relative to the human body, the side of the door opening plate facing the central axis of the human body is the inner side, and the side far away from the human body is the outer side.
When in use, one side of the vertebral lamina is cut open, and then the opposite side is cut into a groove so as to open the vertebral lamina to form an open door; then the upper fixing plate 1 of the cervical vertebra posterior approach door opening plate is placed on the upper vertebral plate 7 at the upper side of the incision, the first supporting feet 4 support the upper vertebral plate 7, the lower fixing plate 3 is placed on the lower vertebral plate 8 at the lower side of the incision, the second supporting feet 5 support the lower vertebral plate 8, and finally the first vertebral plate screw 12 and the second vertebral plate screw 32 are screwed into the first bone screw mounting hole of the upper fixing plate 1 and the second bone screw mounting hole of the lower fixing plate 3 respectively to finish the installation.
The utility model has the following beneficial effects:
according to the cervical vertebra posterior approach opening door plate, the first supporting leg extending transversely is arranged on the inner side of the middle part of the vertebral plate opening supporting plate, and the second supporting leg extending vertically is arranged on the inner side of the joint of the vertebral plate opening supporting plate and the lower fixing plate, so that powerful support is provided, the phenomenon that the door is closed or the door opening angle is reduced after a surgery can be effectively prevented, the expansion effect of a vertebral canal is kept, and effective decompression in the vertebral canal is realized; the included angle between second arm-brace and the bottom plate is the obtuse angle, adopts the obtuse angle design like this, just can play the fixed action through the combination of second arm-brace and vertebral plate screw, can greatly reduced to the requirement of doctor osteotomy angle, and fixed firm, facilitate the use.
In order to improve the fixing firmness of the upper fixing plate 1 and the lower fixing plate 3, the first bone screw mounting holes are preferably at least one pair (at least two holes, three or four holes and the like) and are arranged side by side vertically or horizontally, and the second bone screw mounting holes are preferably one pair and are arranged side by side horizontally.
As shown in fig. 1, preferably, the first bone screw mounting hole is internally provided with a first vertebral plate screw 12 for fixing the upper vertebral plate 7 at the open door of the vertebral plate, the second bone screw mounting hole is internally provided with a second vertebral plate screw 32 for fixing the lower vertebral plate 8 (also called as lateral mass) at the open door of the vertebral plate, the lower end surfaces of the nail heads of the first vertebral plate screw 12 and the second vertebral plate screw 32 are both spherical structures, and the first bone screw mounting hole and the second bone screw mounting hole are both spherical groove structures matched with the spherical structures, so that the firm fixation of the plate and the bone can be realized, and the plate body can be more stably fixed on the vertebral plate. The first bone screw mounting hole and the second bone screw mounting hole can be both countersunk holes without internal threads, so that the first bone screw mounting hole and the second bone screw mounting hole are not provided with internal threads, and can be fixed with the human bone through screws, and stress concentration can be further reduced; the first bone screw mounting hole and the second bone screw mounting hole are both countersunk holes, so that the heads of the first vertebral plate screw 12 and the second vertebral plate screw 32 are not protruded out of the upper surfaces of the two fixing plates when being embedded in the two fixing plates, and the human tissues above the two fixing plates can not be pressed and interfered.
The first arm brace (4) preferably has a transverse length of 0.5-2mm, so that the length is relatively short and can be accurately clamped on the end surface of the upper vertebral plate (7) to avoid the careless clamping of surrounding tissues in the operation.
As shown in fig. 1-2, the neural plate door-opening supporting plate 2 may include a first arc-shaped plate 21 connected with the upper fixing plate 1 and a second arc-shaped plate 22 connected with the lower fixing plate 3, wherein:
the first supporting foot 4 is positioned at the inner side of the joint of the first arc-shaped plate 21 and the second arc-shaped plate 22;
the first arc-shaped plate 21 is designed to have a vertical radian, and the upper fixing plate 1, the first arc-shaped plate 21 and the first supporting leg 4 form a clamping groove 6 (for accommodating the clamping groove 6 at the opening end of the upper vertebral plate 7) for accommodating the opening end of the upper vertebral plate 7 at the opening position of the vertebral plate;
In order to better accommodate the open end of the upper vertebral plate 7, the first arc-shaped plate 21 can be a circular arc with the radius of 2.5-5mm, and/or the second arc-shaped plate 22 can be a circular arc with the radius of 5-13.5mm, so that a larger space can be obtained on the premise of ensuring the strength of the door opening plate; preferably, the first curved plate 21 and the second curved plate 22 are connected tangentially, in which case the strength of the opening plate is optimal.
The height difference H between the first supporting foot 4 and the lower fixing plate 3 is preferably 3-7mm so as to increase the application range of the cervical posterior approach opening door plate, be suitable for different cervical vertebra segments of different crowds, be more suitable for physiological anatomical structures and increase the opening area of the vertebral canal. The inboard (also first arc 21 inboard) of draw-in groove 6 can be equipped with horizontal step 61 (fig. 4), and the quantity of horizontal step 61 can be more than one-level or two-stage, and the 7 open ends of upper vertebral plate that avoid that like this can be better vertically rock in draw-in groove 6.
The upper fixing plate 1 can be in a downward convex arc shape to better adapt to the anatomical shape of the upper vertebral plate 7, so that the upper fixing plate 1 is fixed more firmly.
The upper fixing plate 1, the vertebral plate door opening supporting plate 2 and the lower fixing plate 3 are preferably titanium plates made of pure titanium materials and can be integrally formed, and the thickness can be 0.4-1mm, so that the plate body has better plasticity.
In conclusion, the posterior cervical spine opening door plate is connected by adopting the optimal radian curve after being verified by a plurality of clinical experiments, so that a smooth arc transition connection can be formed after the product and cervical spine are fixed, the stress concentration can be well reduced, the strength of the opening door plate is improved, the requirement on the osteotomy angle of a doctor is greatly reduced, the fixation is firm, the use is convenient, the space occupation can be reduced, and the effective decompression in the vertebral canal can be realized.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (10)
1. The utility model provides a way door plant after cervical vertebra, a serial communication port, including the upper fixed plate (1), the vertebral plate that connect gradually open door backup pad (2) and bottom plate (3), be equipped with first bone screw mounting hole on upper fixed plate (1), be equipped with second bone screw mounting hole on bottom plate (3), the vertebral plate opens door backup pad (2) middle part inboard and is equipped with first spike (4) of horizontal extension, the vertebral plate opens door backup pad (2) and bottom plate (3) junction inboard and is equipped with second spike (5) of vertical extension, contained angle between second spike (5) and bottom plate (3) is the obtuse angle.
2. The opening plate of claim 1, wherein the second bone screw mounting holes are at least one pair and are arranged side by side vertically or horizontally.
3. The posterior cervical opening door panel of claim 2, wherein the first bone screw receiving holes are a pair and are laterally arranged side by side.
4. The posterior cervical opening door plate according to claim 3, wherein the first bone screw mounting hole is provided with a first vertebral plate screw (12) for fixing the upper vertebral plate (7) at the open position of the vertebral plate, the second bone screw mounting hole is provided with a second vertebral plate screw (32) for fixing the lower vertebral plate (8) at the open position of the vertebral plate, the lower end surfaces of the nail heads of the first vertebral plate screw (12) and the second vertebral plate screw (32) are both spherical structures, and the first bone screw mounting hole and the second bone screw mounting hole are both spherical groove structures matched with the spherical structures.
5. The posterior cervical opening door panel of claim 3, wherein the first and second bone screw mounting holes are counter-sunk holes without internal threads.
6. The cervical posterior approach opening door panel according to claim 1, wherein the first temple (4) has a lateral length of 0.5-2 mm.
7. The cervical spine posterior opening door plate according to claim 1, wherein the vertebral plate opening door support plate (2) comprises a first arc plate (21) connected with the upper fixation plate (1) and a second arc plate (22) connected with the lower fixation plate (3), wherein:
the first supporting foot (4) is positioned on the inner side of the joint of the first arc-shaped plate (21) and the second arc-shaped plate (22);
the first arc-shaped plate (21) is designed to be vertical radian, and the upper fixing plate (1), the first arc-shaped plate (21) and the first supporting leg (4) form a clamping groove (6) for accommodating an open end of an upper vertebral plate (7) at the opening position of the vertebral plate;
the second arc-shaped plate (22) is designed to have a transverse radian, and the connecting end of the second arc-shaped plate (22) and the first arc-shaped plate (21) is higher than the connecting end of the second arc-shaped plate (22) and the lower fixing plate (3).
8. The posterior cervical opening door panel according to claim 7, wherein the first curved plate is a circular arc with a radius of 2.5-5mm, and/or the second curved plate is a circular arc with a radius of 5-13.5 mm.
9. The cervical spine posterior approach opening door plate according to claim 7, wherein the first arc plate (21) and the second arc plate (22) are tangentially connected, and/or the height difference between the first supporting foot (4) and the lower fixing plate (3) is 3-7mm, and/or a transverse step is arranged inside the clamping groove (6).
10. The posterior cervical spine opening door plate according to any one of claims 1 to 9, wherein the upper fixing plate (1), the vertebral plate opening support plate (2) and the lower fixing plate (3) are titanium plates, and the thickness of the titanium plates is 0.4 to 1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120457419.5U CN217014182U (en) | 2021-03-03 | 2021-03-03 | Cervical vertebra posterior approach door opening plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120457419.5U CN217014182U (en) | 2021-03-03 | 2021-03-03 | Cervical vertebra posterior approach door opening plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217014182U true CN217014182U (en) | 2022-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120457419.5U Active CN217014182U (en) | 2021-03-03 | 2021-03-03 | Cervical vertebra posterior approach door opening plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217014182U (en) |
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2021
- 2021-03-03 CN CN202120457419.5U patent/CN217014182U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230317 Address after: 100194 G356, Floor 3, Building 1, Yard 9, Chengwan Street, Haidian District, Beijing Patentee after: Beijing natong Medical Technology Holding Co.,Ltd. Address before: 100191 No. 49 Garden North Road, Beijing, Haidian District Patentee before: PEKING University THIRD HOSPITAL (PEKING UNIVERSITY THIRD CLINICAL MEDICAL College) |
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| TR01 | Transfer of patent right |