CN221308510U - Screw-in type side block fusion device - Google Patents
Screw-in type side block fusion device Download PDFInfo
- Publication number
- CN221308510U CN221308510U CN202322665374.2U CN202322665374U CN221308510U CN 221308510 U CN221308510 U CN 221308510U CN 202322665374 U CN202322665374 U CN 202322665374U CN 221308510 U CN221308510 U CN 221308510U
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- Prior art keywords
- screw
- fusion device
- side block
- fixing
- fusion
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- 230000004927 fusion Effects 0.000 title claims abstract description 65
- 210000000988 bone and bone Anatomy 0.000 claims description 16
- 238000010079 rubber tapping Methods 0.000 claims description 6
- 239000011241 protective layer Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 7
- 238000002513 implantation Methods 0.000 abstract description 3
- 208000020431 spinal cord injury Diseases 0.000 abstract 1
- 239000007943 implant Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 7
- 238000001356 surgical procedure Methods 0.000 description 6
- 210000000278 spinal cord Anatomy 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 239000004696 Poly ether ether ketone Substances 0.000 description 3
- 230000009514 concussion Effects 0.000 description 3
- 229920002530 polyetherether ketone Polymers 0.000 description 3
- 210000001519 tissue Anatomy 0.000 description 3
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 210000001767 medulla oblongata Anatomy 0.000 description 2
- 230000002980 postoperative effect Effects 0.000 description 2
- 230000000241 respiratory effect Effects 0.000 description 2
- 208000005422 Foreign-Body reaction Diseases 0.000 description 1
- 208000010496 Heart Arrest Diseases 0.000 description 1
- 206010061218 Inflammation Diseases 0.000 description 1
- 230000000735 allogeneic effect Effects 0.000 description 1
- 210000003484 anatomy Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008468 bone growth Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 210000003692 ilium Anatomy 0.000 description 1
- 230000004054 inflammatory process Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 208000029761 vertebral disease Diseases 0.000 description 1
Abstract
The utility model relates to a screw-in side block fusion device, which belongs to the technical field of medical appliances and comprises a fusion device body, fixing screws and screw-in screws, wherein fixing holes matched with the fixing screws are respectively formed in the left side and the right side of the fusion device body, the fusion device body is also provided with screw-in holes matched with the screw-in screws, the front end of the fusion device body is outwardly narrowed and provided with a narrowing part, and the fusion device body enters into a side block joint through the screw-in screws. The utility model discloses a screw-in lateral mass fusion device, which can solve the problem that the spinal cord injury of a patient is easily caused by a knocking mode used in an implantation process of the traditional lateral mass fusion device.
Description
Technical Field
The utility model relates to the technical field of medical instruments, in particular to a screw-in side block fusion device.
Background
The lateral mass fusion device is medical equipment applied to atlantoaxial surgery, and is mainly used for treating upper cervical vertebra diseases such as atlantoaxial dislocation, cranium and base depression and the like. The lateral mass fusion device is implanted in the lateral mass gap of the atlantoaxial, so that the height required for vertical resetting can be provided, and the resetting effect is improved. Furthermore, the lateral mass fusion cage can provide better supporting force and fusion rate than ilium blocks, and provides a foundation for establishing atlantoaxial long-term stability.
However, one of the current problems is the problem of spinal cord concussion that may occur during insertion of the lateral mass fusion device. Spinal concussion refers to damage to the spinal cord caused by tapping an implanted cage during surgery. The atlantoaxial is located in the craniocervical junction area and is adjacent to medulla oblongata, and the medulla oblongata area has important structures such as respiratory cycle center, and the like, and respiratory cardiac arrest can be caused when the vibration generated by implanting the fusion device is serious, thus endangering the life.
Disclosure of utility model
In order to overcome the defects of the prior art, the utility model provides a screw-in lateral mass fusion device, which can solve the problem that the spinal cord of a patient is easily damaged by a knocking mode used in an implantation process of the traditional lateral mass fusion device.
To achieve the purpose, the utility model adopts the following technical scheme:
The utility model provides a screw-in side block fusion device which comprises a fusion device body, fixing screws and screw-in screws, wherein fixing holes matched with the fixing screws are respectively formed in the left side and the right side of the fusion device body, screw-in holes matched with the screw-in screws are further formed in the fusion device body, the front end of the fusion device body is outwardly narrowed, and a narrowing part is formed in the front end of the fusion device body in a manner that the fusion device body enters a side block joint through the screw-in.
The preferred solution of the utility model consists in that the external diameter of the screw-in screw is greater than the height of the cage body.
The preferable technical scheme of the utility model is that the screw-in screw is of a shallow thread structure, and the thread pitch width is larger than the thread height.
The preferable technical scheme of the utility model is that the fixing screws comprise left fixing screws and right fixing screws; the fixing holes comprise corresponding left fixing holes and right fixing holes; the screwing hole is horizontally arranged in the middle of the left fixing hole and the right fixing hole.
The preferable technical scheme of the utility model is that the left side and the right side of the fixing screw are respectively provided with a bone grafting groove.
The preferable technical scheme of the utility model is that the outer side of the bone grafting groove is provided with a protective layer.
The preferable technical scheme of the utility model is that the inclination angle of the horizontal plane where the fixing screw and the fusion device body are positioned is 35-45 degrees.
The preferred technical proposal of the utility model is that the external diameter of the screwed screw is 3.5mm.
The preferable technical scheme of the utility model is that the upper edge of the fusion device body is provided with an inclined structure.
The preferable technical scheme of the utility model is that the tip of the screw is provided with a self-tapping notch.
The utility model has the beneficial effects that:
The utility model provides a screw-in lateral mass fusion device, which allows a fusion device body to enter a joint in a milder and more accurate manner by additionally arranging screw-in screws and arranging matched screw-in holes on the fusion device body without adopting a traditional knocking manner, so that the risk that vibration and damage are easily caused to a spinal cord by the traditional knocking manner is solved, the safety and the effectiveness of an implant are ensured, and the safety and the success of the operation are vital to the safety of patients in the operation.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a perspective view of a screw-in side block fusion cage according to a first embodiment of the present utility model;
FIG. 2 is a top view of a screw-in side block fusion cage according to a first embodiment of the present utility model;
FIG. 3 is an exploded view of a screw-in side block cage according to a first embodiment of the present utility model;
FIG. 4 is a rear view of a cage body according to a first embodiment of the present utility model;
Fig. 5 is a perspective view of a cage body according to a second embodiment of the present utility model;
fig. 6 is a perspective view of a cage body according to a third embodiment of the present utility model.
In the figure:
1-a cage body; 11-a narrowing; 12. an inclined structure; 2-fixing screws; 21-left set screw; 22-right set screw; 3-screwing in a screw; 31-tip; 32-self-tapping a notch; 4-fixing holes; 41-left fixing hole; 42-right fixing holes; 5-screwing the hole; 6-bone grafting groove.
Detailed Description
The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.
Example 1
As shown in fig. 1 to 4, the screwed-in side block fusion device provided in this embodiment includes a fusion device body 1, a fixing screw 2 and a screwed-in screw 3, specifically, the fixing screw and the screwed-in screw are both structures with gradually narrowed front ends of the screws, and a tip 31 of the screwed-in screw 3 is provided with a self-tapping notch 32. The design of the self-tapping notch enables the screw to be screwed into the lateral mass joint more easily without additional guiding equipment or pre-drilling, so that the operation is simplified, the required steps are reduced, and the operation efficiency is improved. The left and right sides of the fusion device body 1 are respectively provided with a fixing hole 4 matched with the fixing screw 2, the fusion device body 1 is also provided with a screwing hole 5 matched with the screwing screw 3, the front end of the fusion device body 1 is outwardly narrowed and provided with a narrowing part 11, and the tip 31 of the screwing screw 3 penetrates through the fixing hole 4 to enable the fusion device body 1 to enter into the lateral mass joint. After the lateral mass joint is treated and fully loosened by using the special instrument for atlantoaxial surgery, the screwed-in lateral mass fusion device in the embodiment allows the fusion device body to enter the lateral mass joint in a milder and more accurate mode through a screwing-in mode, and the narrowing part structure and the design of the inner height and the outer height of the fusion device body enable the fusion device body to enter the lateral mass joint smoothly and be attached to the lateral mass joint more smoothly without excessive knocking. In addition, the fixing screws on two sides can be screwed into the atlas and the axial vertebral body to prevent the lateral mass fusion cage from shifting and sinking. The screw-in lateral mass fusion device reduces the risk of spinal cord concussion possibly caused in a lateral mass fusion operation, so as to ensure the safety and effectiveness of the implant, reduce the potential complications in the operation process, and is of great importance to the safety of patients in the operation and the success of the operation.
Preferably, the outer diameter d of the screw 3 is greater than the height h of the cage body 1. In this embodiment, the height h of the cage body 1 is 3mm and the outer diameter d of the screw 3 is 4mm. Since the outer diameter of the screw-in screw is greater than the height of the cage body, this means that the cage body can be more firmly attached to the vertebrae. This tight connection helps to provide greater stability, thereby reducing the risk of loosening or dislodging the implant. Stability is critical to the success of surgery and post-operative fusion. In addition, the threaded screw having an outer diameter greater than the height is easier to locate and manipulate during surgery. This enables the medical professional to more accurately position the fusion device, reducing the complexity and potential risk of surgery.
Preferably, the screw 3 is screwed in a shallow thread structure, and the pitch width is larger than the thread height, which refers to the distance between the peaks and the valleys of the thread. Because the screw with the shallow thread structure has larger pitch width, the force of the implant entering the vertebrae is dispersed in a wider area, so that the stress concentration on the vertebrae in the implantation process can be reduced, the damage and the pressure of the tissues of the vertebrae can be further reduced, and the possible fracture or the damage around the implant can be reduced. In addition, since the screw having the shallow thread structure does not excessively invade the tissue of the vertebrae, foreign body reaction or inflammatory reaction around the vertebrae can be further reduced. In this example, the pitch width was 2.5mm and the thread height was 0.1mm.
Preferably, the set screw 2 includes a left set screw 21 and a right set screw 22; the fixing holes 4 include respective left and right fixing holes 41 and 42; the screw hole 5 is horizontally provided at the middle of the left and right fixing holes 41 and 42. By arranging the screw-in holes in the middle of the left and right fixation holes, the stability of the implant is enhanced. This design may provide uniform support and help ensure that the cage body is securely attached to the vertebrae, thereby supporting successful fusion of the implant.
Preferably, the inclination angle of the horizontal plane in which the set screw 2 and the cage body 1 are located is 35-45 °. In this embodiment, the left fixing screw 21 is inclined in the fixing direction from bottom to top, and the right fixing screw 22 is inclined in the fixing direction from top to bottom, both of which are inclined at an angle of 45 °. The oblique angle allows the set screw and the cage body to be inserted into the vertebrae in a more secure manner. Such an angle may provide additional stability and help prevent the implant from dislodging, loosening, or sinking, thereby improving the success rate of the procedure.
Preferably, the left and right sides of the set screw 2 are provided with bone grafting grooves 6, respectively. The peripheral shape of the bone grafting groove near one side of the fixing screw is matched with the shape of the edge of the fixing screw but is not contacted with the shape of the edge of the fixing screw. The provision of the bone graft slots provides additional space that allows a medical professional to place autologous or allogeneic bone into the bone graft slots. This may promote the bone healing process, helping to ensure a firm fusion between the side pieces.
Preferably, the outer side of the bone grafting groove 6 is provided with a protective layer. The outside of the bone grafting groove is wrapped by the material, so that the bone grafting groove is not contacted with the screw and the fixing screw. In the embodiment, the material used for the protective layer is polyether ether ketone (PEEK), which is a material with extremely high biocompatibility, is well compatible with human tissues, and reduces the risk of foreign body rejection. Making it an ideal material for medical implants. And PEEK has good lightweight properties and high strength. The lightweight nature of this material helps to ease the burden on the implant, while the high strength ensures its stability and durability.
Preferably, the material of the screw 3 is titanium alloy. Titanium alloys have multiple advantages as screw-in materials, including light weight, high strength, biocompatibility, corrosion resistance, X-ray transparency, support for bone growth, and operability. These characteristics help to improve the effectiveness of the procedure, reduce the postoperative discomfort to the patient, and at the same time ensure the reliability and durability of the implant.
Example two
As shown in fig. 5, the difference between the first embodiment and the second embodiment is that: the upper edge of the fusion device body 1 is provided with a roof-shaped inclined structure 12 with an opening angle of about 170 degrees, and the fusion device body is more attached to the physiological anatomy structure of the side block under the angle, so that the fusion device body enters the side block joint to be more stable.
Example III
As shown in fig. 6, the screwed-in side block fusion device provided in this embodiment is improved based on the second embodiment, and the difference is that: the inclined structure 12 on the cage body 1 of the present embodiment is open, rather than closed at the upper edge. Under the open structure, the upper edge and the lower edge of the screw-in screw can contact the bone surface in the screwing-in process, so that the screw-in screw and the upper bone surface and the lower bone surface can be connected, and the stability of the whole lateral mass fusion device in the lateral mass joint is further improved.
While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the utility model. The utility model is not to be limited by the specific embodiments disclosed herein, but rather, embodiments falling within the scope of the appended claims are intended to be embraced by the utility model.
Claims (10)
1. A screw-in side block fusion device, characterized in that:
Including fusion ware body (1), set screw (2) and screw in screw (3), the left and right sides of fusion ware body (1) seted up respectively with set screw (2) assorted fixed orifices (4), still be equipped with on fusion ware body (1) with screw in screw (3) assorted screw in hole (5), the front end of fusion ware body (1) is outwards narrowed and is equipped with constriction (11), through the screw in screw (3) makes fusion ware body (1) enter into the side piece joint.
2. The screw-in side block cage of claim 1, wherein:
The outer diameter of the screw-in screw (3) is larger than the height of the fusion device body (1).
3. The screw-in side block cage of claim 2, wherein:
the screw-in screw (3) is of a shallow thread structure, and the thread pitch width is larger than the thread height.
4. The screw-in side block cage of claim 1, wherein:
The fixing screw (2) comprises a left fixing screw (21) and a right fixing screw (22); the fixing holes (4) comprise corresponding left fixing holes (41) and right fixing holes (42); the screw-in hole (5) is horizontally arranged in the middle of the left fixing hole (41) and the right fixing hole (42).
5. The screw-in side block cage of claim 1, wherein:
Bone grafting grooves (6) are respectively formed in the left side and the right side of the fixing screw (2).
6. The screw-in side block fusion cage of claim 5, wherein:
The outer side of the bone grafting groove (6) is provided with a protective layer.
7. The screw-in side block cage of claim 1, wherein:
The inclination angle of the horizontal plane where the fixing screw (2) and the fusion device body (1) are positioned is 35-45 degrees.
8. The screw-in side block cage of claim 2, wherein:
the outer diameter of the screwed screw (3) is 3.5mm.
9. The screw-in side block cage of claim 1, wherein:
The upper edge of the fusion device body (1) is provided with an inclined structure (12).
10. The screw-in side block cage of claim 1, wherein:
The tip (31) of the screw (3) is provided with a self-tapping notch (32).
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221308510U true CN221308510U (en) | 2024-07-12 |
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| Date | Code | Title | Description |
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| GR01 | Patent grant |