Atlantoaxial bone plate fixing device

Abstract

The utility model provides an atlantoaxial bone plate fixing device which comprises an atlas fixing part and an axis fixing part, the atlas fixing part is used for fixing a canine atlas vertebral plate part, the axis fixing part is used for fixing canine axis spinous process and transverse process parts, and the atlas fixing part and the axis fixing part are fixed through a connecting plate. The atlas fixing component and the axis fixing component are respectively provided with a plurality of fixing holes, so that the atlas and the axis of a dog can be effectively, stably, continuously and reliably fixed or locked at multiple angles. The atlantoaxial bone plate fixing device is designed according to the shape of the atlantoaxial bone of a dog, the shape of the atlantoaxial bone plate and the shape of the atlantoaxial bone plate are ingeniously combined for attachment, the atlantoaxial bone plate fixing device can be better fused into fixing treatment, and the atlantoaxial bone plate fixing device is simple in structure, reliable and safe in fixation, light and handy in design, convenient to use and convenient to use.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically, it relates to an atlantoaxial vertebral plate fixation device. Background Technology

[0002] Atlantoaxial instability refers to increased mobility between the first cervical vertebra (atlas) and the second cervical vertebra (axial vertebra), including subluxation and complete dislocation. This condition primarily affects small breed puppies. Normally, the odontoid process is fixed within the atlas by the transverse ligament and the dorsal longitudinal atlantoaxial ligament. However, congenital malformations of the odontoid process, ligament abnormalities, absences, or ruptures, as well as trauma to this area, can all lead to atlantoaxial instability. Clinical symptoms include neck sensitivity and stiffness, limb ataxia, and mild paralysis. Excessive flexion of the head and neck due to trauma is a significant cause of this condition, and symptoms may include neck pain, abnormal posture, ataxia, and limb paralysis. In severe cases, it can even lead to respiratory paralysis and death.

[0003] Surgical procedures for treating atlantoaxial instability in dogs involve the use of cortical bone screws, Kirschner wires, and polymethyl methacrylate (PMMA) bone cement. During the procedure, temporary fixation is first achieved using Kirschner wires to ensure precise placement of the cortical bone screws, which provide high stability due to their close contact with the vertebral cortex. Subsequently, PMMA bone cement is injected through the hollow channels of the screws to enhance fixation and promote vertebral fusion, ultimately achieving atlantoaxial rearrangement and firm fixation, restoring cervical spine stability.

[0004] While the surgical methods described above for treating canine atlantoaxial instability can effectively restore cervical spine stability, they also have several drawbacks. These include potential loosening, displacement, and leakage of PMMA bone cement; the heat released during polymerization that may cause thermal damage to surrounding tissues; significant surgical trauma and high cost; and potential difficulties when screw removal is needed. Furthermore, the surgery carries anesthesia and surgical risks, as well as the possibility of infection. The puncture procedure relies heavily on the surgeon's experience, resulting in insufficient safety during puncture and inadequate overall fixation stability.

[0005] Therefore, there is an urgent need for a bone plate device for treating atlantoaxial fixation in dogs. Utility Model Content

[0006] To overcome the difficulties of existing technologies, this utility model provides an atlantoaxial vertebral plate fixation device, including an atlantoaxial fixation component and an axis fixation component. The atlantoaxial fixation component fixes the atlantoaxial vertebral plate of a canine, and the axis fixation component fixes the spinous process and transverse process of the axis of a canine. The atlantoaxial fixation component and the axis fixation component are fixed together by a connecting plate. Multiple fixation holes are provided on both the atlantoaxial fixation component and the axis fixation component, enabling effective, stable, continuous, and reliable fixation or locking of the canine atlantoaxial and axis vertebrae at multiple angles. The atlantoaxial vertebral plate fixation device provided by this utility model is designed according to the shape of the canine atlantoaxial vertebrae, cleverly combining the shapes of the atlantoaxial and axis vertebrae for better integration into fixation treatment. Its structure is simple, the fixation is reliable and safe, and the design is lightweight, convenient, and easy to use.

[0007] An atlantoaxial vertebral plate fixation device includes an atlantoaxial fixation component and an axis fixation component. The atlantoaxial fixation component fixes the atlantoaxial vertebral plate, and the axis fixation component fixes the spinous process and transverse process of the axis. The atlantoaxial fixation component and the axis fixation component are fixed by a connecting plate.

[0008] Furthermore, the atlas fixation component includes a first atlas fixation component and a second atlas fixation component, and the included angle between the first atlas fixation component and the second atlas fixation component is an obtuse angle.

[0009] The first and second atlas fixation components are symmetrically arranged; the angle between the first and second atlas fixation components is to allow the atlas fixation components to fit more closely to the lamina of the atlas when fixing the atlas, and the obtuse angle is an angle that meets the fixation requirements for clinical diseases in dogs.

[0010] Furthermore, the first and second atlas fixation components are provided with one or more atlas fixation holes.

[0011] In some embodiments, the atlas fixation hole is threaded.

[0012] Furthermore, when the first atlantoaxial fixation component and the second atlantoaxial fixation component are provided with multiple atlantoaxial fixation holes, the central axes of the holes of multiple adjacent atlantoaxial fixation holes in the first atlantoaxial fixation component are parallel, and the central axes of the holes of multiple adjacent atlantoaxial fixation holes in the second atlantoaxial fixation component are parallel.

[0013] In some methods, the first atlantoaxial fixation component has two atlantoaxial fixation holes, and the second atlantoaxial fixation component has two atlantoaxial fixation holes. These four fixation holes are used to fix or lock the atlantoaxial fixation components to the atlantoaxial lamina. Multiple fixation holes on each atlantoaxial fixation component allow for multi-angle fixation of the atlantoaxial vertebra, reducing the risk of loosening or displacement. The specific placement of the fixation holes, by tightening the screws through them, directly fixes the fixation holes to the bone tissue, effectively avoiding damage to nerves, blood vessels, and other related tissues, preventing secondary injury, and further enhancing the therapeutic capabilities of the device.

[0014] Furthermore, the axis fixation component includes a first axis fixation component and a second axis fixation component, wherein the first axis fixation component and the second axis fixation component are arc-shaped.

[0015] The first axis fixation component and the second axis fixation component are symmetrically arranged; the first axis fixation component and the second axis fixation component are arc-shaped in order to fit the spinous process and transverse process of the axis.

[0016] Furthermore, the first axis fixation component and the second axis fixation component are provided with one or more axis fixation holes.

[0017] In some embodiments, the pivot fixation hole is threaded.

[0018] Furthermore, when the first axis fixation component and the second axis fixation component are provided with multiple axis fixation holes, the included angle between the center of the multiple adjacent axis fixation holes in the first axis fixation component is an acute angle, and the included angle between the center of the multiple adjacent axis fixation holes in the second axis fixation component is an acute angle.

[0019] The acute angle at the center of the multiple fixation holes of the fixation component on the same side of the axis is an angle that meets the fixation requirements for clinical diseases in dogs.

[0020] In some embodiments, the first axis fixation component has two axis fixation holes, and the second axis fixation component has two axis fixation holes. One fixation hole of the first axis fixation component is used to fix the spinous process of the axis, and the other fixation hole is used to fix the transverse process of the axis; the two fixation holes of the second axis fixation component serve the same function as the two fixation holes of the first axis fixation component. Having multiple fixation holes in each axis fixation component allows for multi-angle fixation at different positions of the axis, reducing the risk of loosening or displacement.

[0021] Furthermore, the connecting plate includes a first connecting plate and a second connecting plate, the first connecting plate connecting the first atlantoaxial fixation component and the first axis fixation component, and the second connecting plate connecting the second atlantoaxial fixation component and the second axis fixation component.

[0022] Furthermore, the angle between the first connecting plate and the first atlantoaxial fixation component, and the angle between the second connecting plate and the second atlantoaxial fixation component, are obtuse angles.

[0023] The angle between the connecting plate and the atlas fixation component is an obtuse angle to accommodate the angular changes at the connection between the atlas and axis.

[0024] Furthermore, the angle between the first connecting plate and the first pivot fixation component, and the angle between the second connecting plate and the second pivot fixation component are obtuse angles.

[0025] The angle between the connecting plate and the axis fixation component is an obtuse angle so that the axis fixation component can better fit the shape of the axis when fixing the axis.

[0026] This utility model has the following beneficial effects:

[0027] (1) An atlantoaxial vertebral plate fixation device is provided, comprising an atlantoaxial fixation component and an axis fixation component, wherein the atlantoaxial fixation component fixes the atlantoaxial vertebral plate of a canine, and the axis fixation component fixes the spinous process and transverse process of the axis of a canine, and the atlantoaxial fixation component and the axis fixation component are fixed by a connecting plate;

[0028] (2) Multiple fixing holes are provided on the atlas fixing component and the axis fixing component respectively, which can effectively, stably, continuously and reliably fix or lock the canine atlas and axis at multiple angles;

[0029] (3) The atlantoaxial vertebral plate fixation device provided by this utility model is designed according to the shape of the canine atlantoaxial vertebra, and cleverly combines the shapes of the atlantoaxial vertebra and the atlantoaxial vertebra to fit together, so as to better integrate into the fixation treatment. Its structure is simple, the fixation is reliable and safe, the design is lightweight and convenient, and it is easy to use. Attached Figure Description

[0030] Figure 1 Schematic diagram of the overall structure of the atlantoaxial vertebral plate fixation device Figure 1 ;

[0031] Figure 2 Schematic diagram of the overall structure of the atlantoaxial vertebral plate fixation device Figure 2 ;

[0032] Figure 3 Schematic diagrams of the atlas fixation component and the axis fixation component;

[0033] Figure 4 A schematic diagram of the first atlantoaxial fixation component and the included angle structure of the first atlantoaxial fixation component;

[0034] Figure 5 A schematic diagram of the central axis structure of the atlas fixation hole and the axis fixation hole;

[0035] Figure 6This is a schematic diagram of the connecting plate structure;

[0036] Figure 7 Schematic diagram of the atlantoaxial vertebral structure in dogs, using an atlantoaxial vertebral plate fixation device;

[0037] Figure 8 For different models of atlantoaxial vertebral plate fixation devices. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments described below are intended to facilitate the understanding of the present invention and do not constitute any limitation thereof.

[0039] Example 1: An atlantoaxial vertebral plate fixation device

[0040] like Figure 1-2 As shown, an atlantoaxial vertebral plate fixation device includes an atlantoaxial fixation component 1, an axis fixation component 2, and a connecting plate 3. The atlantoaxial fixation component 1 fixes the atlantoaxial vertebral plate, the axis fixation component 2 fixes the spinous process and transverse process of the axis, and the atlantoaxial fixation component 1 and the axis fixation component 2 are fixed by the connecting plate 3.

[0041] like Figure 3-5 and Figure 7 As shown, the atlas fixation component 1 includes a first atlas fixation component 4 and a second atlas fixation component 5. The first and second atlas fixation components 4 and 5 are symmetrically arranged, with an obtuse angle 6 between them. This angle 6 allows the first and second atlas fixation components 4 and 5 to fit more closely to the atlas lamina. The obtuse angle is an angle that meets the fixation requirements for clinical diseases in dogs. The first atlas fixation component 4 has atlas fixation holes 7 and 8, and the second atlas fixation component 5 has atlas fixation holes 9 and 10. The central axes of the holes 7 and 8 are parallel, as are the central axes of the holes 9 and 10. All four holes (7, 8, 9, and 10) are threaded, allowing the first and second atlas fixation components 4 and 5 to be fixed to the atlas lamina using screws. These four fixation holes allow for multi-angle fixation of the atlas, reducing the risk of loosening or displacement. The placement of the fixation hole is unique. By tightening the screw through the fixation hole, the fixation hole is directly fixed to the bone tissue, which can effectively avoid damage to nerves, blood vessels and other related tissues, prevent secondary damage, and further enhance the ability of the device to treat.

[0042] like Figure 3 , Figure 5 and Figure 7As shown, the axis fixation component 2 includes a first axis fixation component 11 and a second axis fixation component 12, which are symmetrically arranged. Both the first and second axis fixation components 11 and 12 are arc-shaped to better fit the spinous and transverse processes of the axis. The first axis fixation component 11 has axis fixation holes 13 and 14, and the second axis fixation component 12 has axis fixation holes 15 and 16. The centers of the holes 13 and 14 form an acute angle, as do the centers of the holes 15 and 16. These acute angles are designed to meet the fixation requirements for clinical diseases in dogs. The axis fixation holes 13, 14, 15, and 16 are all threaded. Screws are used to fix the axis fixation component 2 to the spinous process of the axis in holes 13 and 16, while screws are used to fix the axis fixation component 2 to the transverse process of the axis. These four axis fixation holes allow for multi-angle fixation of the axis at different positions, reducing the risk of loosening or displacement.

[0043] like Figure 6 As shown, the connecting plate 3 includes a first connecting plate 17 and a second connecting plate 18. The first connecting plate 17 connects the first atlantoaxial fixation component 4 and the first axis fixation component 11. The second connecting plate 18 connects the second atlantoaxial fixation component 5 and the second axis fixation component 12. The angles between the first connecting plate 17 and the first atlantoaxial fixation component 4, and between the second connecting plate 18 and the second atlantoaxial fixation component 5, are obtuse angles. The obtuse angles between the connecting plates and the atlantoaxial fixation components are designed to accommodate the angular changes at the connection between the atlantoaxial and axis vertebrae. The obtuse angles between the first connecting plate 17 and the first axis fixation component 11, and between the second connecting plate 18 and the second axis fixation component 12, are designed to better conform to the shape of the axis vertebra.

[0044] like Figure 8 As shown, different models of atlantoaxial vertebral plate fixation devices are suitable for fixing the atlantoaxial vertebrae of dogs of different body sizes.

[0045] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. An atlas-axis bone plate fixation device, comprising: The application relates to a cervical vertebra fixation device, which comprises an atlas fixation component and a pivot vertebra fixation component.

2. The atlantoaxial bone plate fixation device of claim 1, wherein, The atlas fixation component comprises a first atlas fixation component and a second atlas fixation component, and the included angle between the first atlas fixation component and the second atlas fixation component is obtuse.

3. The atlantoaxial bone plate fixation device of claim 2, wherein, The first atlas fixation component and the second atlas fixation component are provided with one or more atlas fixation holes.

4. The atlantoaxial bone plate fixation device of claim 3, wherein, When the first atlas fixation component and the second atlas fixation component are provided with multiple atlas fixation holes, the hole center axes of the multiple adjacent atlas fixation holes in the first atlas fixation component are parallel, and the hole center axes of the multiple adjacent atlas fixation holes in the second atlas fixation component are parallel.

5. The atlantoaxial bone plate fixation device of claim 4, wherein, The pivot vertebra fixation component comprises a first pivot vertebra fixation component and a second pivot vertebra fixation component, and the first pivot vertebra fixation component and the second pivot vertebra fixation component are arc-shaped.

6. The atlantoaxial bone plate fixation device of claim 5, wherein, The first pivot vertebra fixation component and the second pivot vertebra fixation component are provided with one or more pivot vertebra fixation holes.

7. The atlantoaxial bone plate fixation device of claim 6, wherein, When the first pivot vertebra fixation component and the second pivot vertebra fixation component are provided with multiple pivot vertebra fixation holes, the hole center axes of the multiple adjacent pivot vertebra fixation holes in the first pivot vertebra fixation component are acute, and the hole center axes of the multiple adjacent pivot vertebra fixation holes in the second pivot vertebra fixation component are acute.

8. The atlantoaxial bone plate fixation device of claim 7, wherein, The connecting plate comprises a first connecting plate and a second connecting plate, the first connecting plate connects the first atlas fixation component and the first pivot vertebra fixation component, and the second connecting plate connects the second atlas fixation component and the second pivot vertebra fixation component.

9. The atlantoaxial bone plate fixation device of claim 8, wherein, The included angle between the first connecting plate and the first atlas fixation component and the included angle between the second connecting plate and the second atlas fixation component are obtuse.

10. The atlantoaxial bone plate fixation device of claim 9, wherein, The included angle between the first connecting plate and the first pivot vertebra fixation component and the included angle between the second connecting plate and the second pivot vertebra fixation component are obtuse.

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