Cervical vertebra self-stabilizing fusion cage and cervical vertebra self-stabilizing fusion assembly

Abstract

The utility model relates to the technical field of medical instruments, in particular to a cervical vertebra self-stabilizing fusion cage and a cervical vertebra self-stabilizing fusion assembly. The cervical vertebra self-stabilizing fusion cage comprises a mounting base, a head fixing assembly, a tail fixing assembly and a fusion cage body. The mounting seat comprises a first mounting part and a second mounting part, and the second mounting part is connected with the first mounting part. The head-direction fixing assembly comprises a plurality of head-direction screws, the tail-direction fixing assembly comprises a plurality of tail-direction screws, the head-direction screws are obliquely arranged on the first mounting part outwards, and the tail-direction screws are obliquely arranged on the second mounting part outwards; and a gap is formed between the connection position of the tail screw and the second mounting part and the first mounting part. The fusion cage body is arranged on the first mounting part, and the fusion cage body is located on the same side of the head-direction fixing assembly and the tail-direction fixing assembly. The cervical vertebra self-stabilizing fusion cage overcomes the defect that an existing cervical vertebra self-stabilizing fusion cage cannot be suitable for high-position segment implantation.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a cervical vertebra self-stabilizing fusion device and a cervical vertebra self-stabilizing fusion component. Background Art

[0002] Anterior cervical discectomy and fusion (ACDF) is a classic surgical procedure for treating cervical spondylosis. It opens the intervertebral space to restore the physiological curvature of the cervical spine and reconstruct the stability of the diseased segment.

[0003] In the existing technology, self-stabilizing fusion devices are usually used to repair diseased cervical vertebrae. During repair, the diseased intervertebral disc is first hollowed out. Then, the adjacent vertebral bodies are supported by the head screw and caudal screw of the self-stabilizing fusion device with a certain angle. Then, a replacement intervertebral disc is implanted in the hollowed-out position of the diseased intervertebral disc. However, the angle between the head screw and caudal screw in existing cervical self-stabilizing fusion devices is large. When the tail screw is implanted at a high position, it faces challenging anatomical structures and the device is prone to interference with the human mandible. Therefore, it is not suitable for high-segment implantation. Utility Model Content

[0004] The utility model provides a cervical vertebra self-stabilizing fusion device and a cervical vertebra self-stabilizing fusion component, which are used to solve the defect that the existing cervical vertebra self-stabilizing fusion device is not suitable for high-segment implantation.

[0005] On one hand, the utility model provides a cervical vertebra self-stabilizing fusion device, comprising: a mounting seat, a head-directed fixing assembly, a caudal-directed fixing assembly and a fusion device body.

[0006] The mounting seat includes a first mounting portion and a second mounting portion, and the second mounting portion is connected to the first mounting portion; the head-directed fixing assembly includes a plurality of head-directed screws, and the caudal-directed fixing assembly includes a plurality of caudal-directed screws, the head-directed screws are arranged on the first mounting portion at an outward angle, and the caudal-directed screws are arranged on the second mounting portion at an outward angle, and a distance is provided between the connection position of the caudal-directed screw and the second mounting portion and the first mounting portion; the fusion device body is arranged on the first mounting portion, and the fusion device body is located on the same side of the head-directed fixing assembly and the caudal-directed fixing assembly.

[0007] According to the cervical vertebra self-stabilizing fusion device provided by the present invention, the distance between the connection position of the caudal screw and the second mounting portion and the first mounting portion is 5 mm to 5.5 mm.

[0008] According to the cervical vertebra self-stabilizing fusion device provided by the utility model, the angle between the caudal screw and the fusion device body is 5° to 10°.

[0009] According to the cervical vertebra self-stabilizing fusion device provided by the present invention, a first mounting hole is provided on the second mounting portion, the tail screw is provided in the first mounting hole, and the angle between the axis of the first mounting hole and the second mounting portion is 98° to 102°.

[0010] According to the cervical vertebra self-stabilizing fusion device provided by the utility model, the angle between the head-directed screw and the fusion device body is 30° to 40°.

[0011] According to the cervical vertebra self-stabilizing fusion device provided by the present invention, a second mounting hole is provided on the first mounting portion, the head screw is provided in the second mounting hole, and the angle between the axis of the second mounting hole and the first mounting portion is 30° to 40°.

[0012] According to the cervical vertebra self-stabilizing fusion device provided by the present invention, the angle between the first mounting portion and the second mounting portion is 90° to 100°.

[0013] According to the cervical vertebra self-stabilizing fusion device provided by the present invention, the first mounting portion and the second mounting portion are integrally provided.

[0014] According to the cervical self-stabilizing fusion device provided by the present invention, the head-directed fixation assembly includes two head-directed screws, which are symmetrically arranged on both sides of the first mounting portion, and the caudal-directed fixation assembly includes two caudal-directed screws, which are symmetrically arranged on both sides of the second mounting portion.

[0015] Another aspect of the present invention provides a cervical vertebra self-stabilizing fusion assembly, comprising: a holder and a cervical vertebra self-stabilizing fusion device as described above, wherein an end portion of the holder is detachably connected to the cervical vertebra self-stabilizing fusion device.

[0016] The cervical vertebrae self-stabilizing fusion device and cervical vertebrae self-stabilizing fusion assembly provided by the present invention are configured such that a fixing seat is provided with a first mounting portion and a second mounting portion that are connected to each other, a head screw is tilted outwardly and is provided on the first mounting portion, a tail screw is tilted outwardly and is provided on the second mounting portion, and a distance is provided between the connection position of the tail screw and the second mounting portion and the first mounting portion, so that the head screw and the tail screw can reduce the angle between the tail screw and the second mounting portion under the premise of supporting adjacent cervical vertebrae. The cervical vertebrae self-stabilizing fusion device provided by the present invention allows the tail screw to be implanted into the lower vertebrae using a direct-view instrument while avoiding interference with the human mandible, and is suitable for high-position implantation, thereby solving the defect that the existing cervical vertebrae self-stabilizing fusion device cannot be applied to high-segment implantation and improving the scope of application of the cervical vertebrae self-stabilizing fusion device.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is one of the schematic diagrams of the cervical vertebra self-stabilizing fusion device provided by the embodiment of the present utility model.

[0020] Figure 2 This is the second schematic diagram of the cervical vertebra self-stabilizing fusion device provided by the embodiment of the present utility model.

[0021] Figure 3 This is one of the schematic diagrams of the mounting seat in the cervical vertebra self-stabilizing fusion device provided in the embodiment of the present utility model.

[0022] Figure 4 This is the second schematic diagram of the mounting seat in the cervical vertebra self-stabilizing fusion device provided by the embodiment of the present utility model.

[0023] Figure 5 It is a schematic diagram of a cervical vertebra self-stabilizing fusion assembly provided by an embodiment of the present utility model.

[0024] Reference numerals:

[0025] 10. Self-stabilizing cervical fusion device; 110. Mounting seat; 111. First mounting portion; 1111. Second mounting hole; 112. Second mounting portion; 1121. First mounting hole; 120. Head-directed fixation assembly; 121. Head-directed screw; 130. Caudal-directed fixation assembly; 131. Caudal-directed screw; 140. Fusion device body; 20. Holder. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0028] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0029] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0031] The following combination Figures 1 to 5 The utility model describes a cervical vertebra self-stabilizing fusion device and a cervical vertebra self-stabilizing fusion assembly.

[0032] See also Figure 1 and Figure 2 As shown, the embodiment of the present invention provides a cervical self-stabilizing fusion device 10 , which includes a mounting seat 110 , a head-directed fixation assembly 120 , a caudal-directed fixation assembly 130 and a fusion device body 140 .

[0033] Among them, the mounting seat 110 includes a first mounting portion 111 and a second mounting portion 112, and the second mounting portion 112 is connected to the first mounting portion 111; the head-directed fixing assembly 120 includes a plurality of head-directed screws 121, and the tail-directed fixing assembly 130 includes a plurality of tail-directed screws 131, the head-directed screws 121 are arranged outwardly on the first mounting portion 111, and the tail-directed screws 131 are arranged outwardly on the second mounting portion 112, and a distance is provided between the connection position of the tail-directed screws 131 and the second mounting portion 112 and the first mounting portion 111; the fusion body 140 is arranged on the first mounting portion 111, and the fusion body 140 is located on the same side of the head-directed fixing assembly 120 and the tail-directed fixing assembly 130.

[0034] The cervical vertebra self-stabilizing fusion device 10 and the cervical vertebra self-stabilizing fusion assembly provided by the present invention are configured as a fixing seat with a first mounting portion 111 and a second mounting portion 112 connected to each other, a head screw 121 is tilted outwardly and is arranged on the first mounting portion 111, and a tail screw 131 is tilted outwardly and is arranged on the second mounting portion 112, and a distance is provided between the connection position of the tail screw 131 and the second mounting portion 112 and the first mounting portion 111. This enables the head screw 121 and the tail screw 131 to support adjacent cervical vertebral bodies while reducing the angle between the tail screw 131 and the second mounting portion 112. The cervical vertebra self-stabilizing fusion device 10 provided by the present invention allows the tail screw to be implanted into the lower vertebral body using a direct-view instrument while avoiding interference with the human mandible, and is suitable for high-position implantation, thereby solving the defect that the existing cervical vertebra self-stabilizing fusion device is not suitable for high-segment implantation and improving the scope of application of the cervical vertebra self-stabilizing fusion device.

[0035] Specifically, in this embodiment, the head screw 121 is used to be implanted into the upper cervical vertebral body, and the caudal screw 131 is used to be implanted into the lower cervical vertebral body. One end of the fusion body 140 is connected to the first mounting portion 111 and is located between the head screw 121 and the caudal screw 131. During repair, the diseased intervertebral disc is first hollowed out. Then, the head screw 121 and the caudal screw 131 of the self-stabilizing fusion device, which have a certain angle, are screwed into the adjacent cervical vertebral bodies. The fusion body 140 is then implanted into the hollowed position of the diseased intervertebral disc. The head screw 121 and the caudal screw 131 can fix the implantation position of the fusion body 140.

[0036] The cephalad fixation assembly 120 includes two cephalad screws 121, symmetrically positioned on either side of the first mounting portion 111. The axes of the two cephalad screws 121 are offset outward (i.e., the ends of the two cephalad screws 121 extend away from each other), with an offset angle of 5°. The caudal fixation assembly 130 includes two caudal screws 131, symmetrically positioned on either side of the second mounting portion 112. The axes of the two caudal screws 131 are offset inward (i.e., the ends of the two caudal screws 131 extend toward each other), with an offset angle of 10°. This improves the stability of the connection between the cephalad and caudal screws 121, 131 and the cervical vertebral bodies.

[0037] It should be noted that the above “the head screw 121 is tilted outwardly and arranged on the first mounting portion 111” specifically refers to the head screw 121 being arranged in a direction away from the fusion body 140. Similarly, the above “the tail screw 131 is tilted outwardly and arranged on the second mounting portion 112” specifically refers to the tail screw 131 being arranged in a direction away from the fusion body 140. Figure 2 In the direction indicated by the arrow.

[0038] See also Figure 2 As shown, according to some embodiments of the present invention, the distance between the connection position of the tail screw 131 and the second mounting portion 112 and the first mounting portion 111 ( Figure 2 The distance between the caudal screw 131 and the second mounting portion 112 and the first mounting portion 111 is set to 5 mm to 5.5 mm. This allows the caudal screw 131 to be properly positioned, facilitating connection with the cervical vertebral body. It also maintains a small angle between the caudal screw 131 and the horizontal plane, preventing interference between the device and the mandible during high-position implantation of the direct-view instrument.

[0039] Specifically, the distance between the connection position between the tail screw 131 and the second mounting portion 112 and the first mounting portion 111 can be set to 5 mm, 5.3 mm, or 5.5 mm.

[0040] See also Figure 2 As shown, according to some embodiments of the present invention, the angle between the tail screw 131 and the fusion body 140 ( Figure 2 The angle α in the figure is 5° to 10°. By setting the included angle between the caudal screw 131 and the fusion device body 140 to 5° to 10°, the caudal screw 131 can be easily connected to the cervical vertebral body and a small included angle between the caudal screw 131 and the horizontal plane can be maintained, thereby preventing interference between the device and the human mandible during high-position implantation of the direct-view instrument.

[0041] Specifically, the angle between the tail screw 131 and the second mounting portion 112 can be 5°, 7°, 10°, etc.

[0042] See also Figures 2 to 4 As shown, according to some embodiments of the present invention, the second mounting portion 112 is provided with a first mounting hole 1121, the tail screw 131 is provided in the first mounting hole 1121, and the angle between the axis of the first mounting hole 1121 and the second mounting portion 112 is ( Figure 4 The angle β) is 98° to 102°. Providing a first mounting hole 1121 extending in a set direction on the second mounting portion 112 can guide the caudal screw 131, ensuring that it can be screwed into the cervical vertebral body in the set direction, thereby improving surgical implantation accuracy and simplifying the structure.

[0043] Specifically, the angle between the axis of the first mounting hole 1121 and the second mounting portion 112 can be 98°, 100°, 102°, etc.

[0044] During the implantation operation, the caudal screw 131 is rotated, and the caudal screw 131 can be screwed into the cervical vertebral body along the direction of the first mounting hole 1121.

[0045] See also Figure 2 As shown, according to some embodiments of the present invention, the angle between the head screw 121 and the fusion body 140 ( Figure 2 By setting the included angle between the head screw 121 and the fusion body 140 to be 30° to 40°, the head screw 121 and the caudal screw 131 can be arranged at a certain angle, which facilitates connection with the cervical vertebral body.

[0046] Specifically, the angle between the head screw 121 and the fusion device body 140 can be 30°, 35°, 40°, etc.

[0047] See also Figures 2 to 4 As shown, according to some embodiments of the present invention, the first mounting portion 111 is provided with a second mounting hole 1111, the head screw 121 is provided in the second mounting hole 1111, and the angle between the axis of the second mounting hole 1111 and the first mounting portion 111 is ( Figure 4 The angle θ is 30° to 40°. Providing a second mounting hole 1111 extending in a set direction on the first mounting portion 111 can guide the head screw 121, ensuring that it can be screwed into the cervical vertebral body in the set direction, thereby improving surgical implantation accuracy and simplifying the structure.

[0048] Specifically, the angle between the axis of the second mounting hole 1111 and the first mounting portion 111 may be 30°, 35°, 40°, etc.

[0049] During the implantation operation, the head screw 121 is rotated, and the head screw 121 can be screwed into the cervical vertebral body along the direction of the second mounting hole 1111.

[0050] See also Figures 2 to 4 As shown, according to some embodiments of the present invention, the angle between the first mounting portion 111 and the second mounting portion 112 is 90° to 100°. By configuring the first mounting portion 111 and the second mounting portion 112 to have an angle between them of 90° to 100°, while ensuring a predetermined spacing between the connection point between the tail screw 131 and the second mounting portion 112 and the first mounting portion 111, the volume of the second mounting portion 112 can be minimized, thereby reducing the overall volume of the mounting base 110 and the volume of the device implanted in the patient.

[0051] Specifically, the angle between the first mounting portion 111 and the second mounting portion 112 can be 90°, 95°, 100°, etc.

[0052] See also Figures 2 to 4 As shown, according to some embodiments of the present invention, the first mounting portion 111 and the second mounting portion 112 are integrally provided. By configuring the first mounting portion 111 and the second mounting portion 112 as an integral arrangement, the connection stability of the first mounting portion 111 and the second mounting portion 112 can be improved, eliminating the need for a connecting structure between the first mounting portion 111 and the second mounting portion 112, and improving the integrity of the device.

[0053] The following describes the cervical vertebrae self-stabilizing fusion assembly provided by the present invention. The cervical vertebrae self-stabilizing fusion assembly described below and the cervical vertebrae self-stabilizing fusion device 10 described above can correspond to each other.

[0054] See also Figure 5 As shown, an embodiment of the present invention provides a cervical vertebra self-stabilizing assembly, comprising: a holder 20 and a cervical vertebra self-stabilizing fusion device 10 as provided in any of the above embodiments, wherein the end of the holder 20 is detachably connected to the cervical vertebra self-stabilizing fusion device 10.

[0055] The cervical vertebra self-stabilizing fusion assembly provided by the present invention can, when implanted, clamp and fix the cervical vertebra self-stabilizing fusion device 10 through the holder 20, and ensure that the cervical vertebra self-stabilizing fusion device 10 is in a stable state, ensuring that the cervical vertebra self-stabilizing fusion device 10 can be correctly placed and fixed on the cervical vertebral body. The doctor can adjust the position and angle of the cervical vertebra self-stabilizing fusion device 10 by operating the holder 20 to ensure good contact with the cervical vertebral body and achieve the desired fusion effect. When the cervical vertebra self-stabilizing fusion device has been successfully fixed and the position has been confirmed to be stable after inspection, the holder can be detached from the fusion device.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A cervical vertebrae self-stabilizing fusion device, characterized in that: include: A mounting seat, a head-directed fixation assembly, a caudal-directed fixation assembly, and a fusion device body; The mounting seat includes a first mounting portion and a second mounting portion, wherein the second mounting portion is connected to the first mounting portion; The head-direction fixing assembly includes a plurality of head-direction screws, and the tail-direction fixing assembly includes a plurality of tail-direction screws. The head-direction screws are arranged outwardly at an angle on the first mounting portion, and the tail-direction screws are arranged outwardly at an angle on the second mounting portion. A distance is provided between the connection position of the tail-direction screw and the second mounting portion and the first mounting portion. The fusion device body is provided on the first mounting portion, and the fusion device body is located on the same side of the head-direction fixing assembly and the caudal-direction fixing assembly.

2. The cervical vertebra self-stabilizing fusion cage according to claim 1, characterized in that: The distance between the connection position of the tail screw and the second mounting portion and the first mounting portion is 5 mm to 5.5 mm.

3. The cervical vertebra self-stabilizing fusion cage according to claim 1, characterized in that: The included angle between the caudal screw and the fusion device body is 5° to 10°.

4. The cervical vertebra self-stabilizing fusion cage according to claim 3, characterized in that: The second mounting portion is provided with a first mounting hole, the tail screw is provided in the first mounting hole, and the angle between the axis of the first mounting hole and the second mounting portion is 98° to 102°.

5. The cervical vertebra self-stabilizing fusion cage according to claim 1, characterized in that: The included angle between the head screw and the fusion device body is 30° to 40°.

6. The cervical vertebra self-stabilizing fusion cage according to claim 5, characterized in that: A second mounting hole is provided on the first mounting portion, the head screw is provided in the second mounting hole, and the angle between the axis of the second mounting hole and the first mounting portion is 30° to 40°.

7. The cervical vertebra self-stabilizing fusion cage according to claim 1, characterized in that: An included angle between the first mounting portion and the second mounting portion is 90° to 100°.

8. The cervical vertebra self-stabilizing fusion cage according to any one of claims 1 to 7, characterized in that: The first mounting portion and the second mounting portion are integrally provided.

9. The cervical vertebrae self-stabilizing fusion cage according to any one of claims 1 to 7, characterized in that: The head-direction fixing assembly includes two head-direction screws, which are symmetrically arranged on both sides of the first mounting portion. The tail-direction fixing assembly includes two tail-direction screws, which are symmetrically arranged on both sides of the second mounting portion.

10. A cervical vertebra self-stabilizing fusion assembly, characterized in that: include: A holder and a cervical vertebrae self-stabilizing fusion device according to any one of claims 1 to 9, wherein the end of the holder is detachably connected to the cervical vertebrae self-stabilizing fusion device.

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