Distraction fusion cage
By designing an adjustable structure that can expand the fusion device, the problem of the traditional fusion device being unable to be adjusted is solved, achieving a high degree of adjustability, reducing surgical preparation and risks, and improving surgical efficiency and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-03-27
AI Technical Summary
Traditional anchored interbody fusion devices are fixed, integrated structures that cannot be adjusted, requiring the availability of multiple sizes during surgery, which prolongs the operation time and increases the risks.
Design an expandable fusion device, which uses symmetrically arranged upper and lower support blocks. The height can be adjusted by adjusting the structure, including adjusting screws and sliding sleeves. The sliding sleeves slide on the inclined groove to move the support blocks closer to or further away.
It achieves adjustable fusion device height, reduces surgical inventory, saves time and costs, reduces risks, and is self-stabilizing, small in size, and easy to implant.
Smart Images
Figure CN224039405U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of medical apparatus and instruments, and particularly relates to a fusion cage capable of being expanded. BACKGROUND
[0002] When the intervertebral disc of the spine is diseased or necrotic, a vertebral fusion operation needs to be performed, and the traditional surgical plan is to remove the diseased intervertebral disc and then place an intervertebral fusion cage that is consistent in shape with the intervertebral disc at the position of the removed intervertebral disc.
[0003] The conventional anchoring intervertebral fusion cage is usually of a fixed integrated structure and cannot be adjusted, so it cannot be adjusted according to the gap height between adjacent vertebral blocks, and when the gap height between adjacent vertebral blocks is different, an intervertebral fusion cage of different height needs to be selected, so that more fusion cages of different height specifications need to be prepared during the operation, and the fusion cage needs to be sterilized multiple times or needs to be selected by using a test mold multiple times to select a fusion cage of a suitable height, thereby prolonging the operation time, increasing the operation risk, and having low practicability. SUMMARY
[0004] The utility model aims at solving the defects and deficiencies in the prior art, and provides a fusion cage capable of being expanded, which can select a suitable height according to a patient, requires less preparation during an operation, can save more operation time and reduce the operation risk, and reduces the operation cost.
[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of a fusion cage capable of being expanded, which comprises symmetrically arranged upper support blocks and lower support blocks and an adjusting structure arranged between the upper support blocks and the lower support blocks, the adjusting structure comprises an adjusting screw and a sliding sleeve threadedly connected with the adjusting screw, the sliding sleeve is slidably connected with inclined grooves on the upper support blocks and the lower support blocks through fixing pins on the upper and lower sides of the sliding sleeve, and the sliding sleeve can drive the fixing pins to move left and right along the inclined grooves under the action of the adjusting screw, so as to drive the upper support blocks and the lower support blocks to move towards each other or away from each other.
[0006] Preferably, the sliding sleeve comprises first and second sliding sleeves reversely threadedly connected with the adjusting screw, and the first and second sliding sleeves can move towards each other or away from each other under the action of the adjusting screw.
[0007] Preferably, two groups of inclined grooves on the upper support blocks and the lower support blocks are symmetrically arranged and matched with the fixing pins on the first and second sliding sleeves.
[0008] Preferably, the two groups of inclined grooves on the upper support blocks are designed to be inclined from top to bottom in a direction away from each other, and the two groups of inclined grooves on the lower support blocks are designed to be inclined from bottom to top in a direction away from each other.
[0009] Preferably, the end of the adjusting screw is connected with a limiting sleeve, the limiting sleeve is provided with a through hole matched with the adjusting screw, and a clamping groove matched with the end of the upper supporting block and the lower supporting block.
[0010] Preferably, the limiting sleeve is further provided with a groove matched with the surgical tool.
[0011] Preferably, the upper surface of the upper supporting block and the lower surface of the lower supporting block are both provided with a sawtooth structure.
[0012] After the technical scheme is applied, the expandable fusion cage has the following beneficial effects:
[0013] The height of the fusion cage can be adjusted according to the specific needs of the patient to select the appropriate height of expansion, so that the surgical time can be saved, the surgical risk can be reduced, the surgical cost can be reduced, the fusion cage is not easy to slip off, is self-stable, has a small volume, is convenient to implant, and the like. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a plan view of the expandable fusion cage of the utility model;
[0015] Figure 2 It is a plan view of the expandable fusion cage of the utility model;
[0016] Figure 3 It is a sectional view of the upper supporting block in the utility model;
[0017] Figure 4 It is a schematic view of a state before expansion of the expandable fusion cage of the utility model;
[0018] Figure 5 It is a schematic view of a state after expansion of the expandable fusion cage of the utility model.
[0019] Wherein: the upper supporting block 1, the lower supporting block 2, the adjusting screw 3, the sliding sleeve 4, the fixing pin 5, the inclined groove 6, the limiting sleeve 7, the through hole 71, the clamping groove 72, and the groove 73. DETAILED DESCRIPTION
[0020] The utility model will be further clearly and completely described in connection with the drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0021] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.
[0022] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale of the various parts shown in the drawings. Techniques, methods, and apparatus known to those of ordinary skill are not discussed in detail because they would be understood that such techniques, methods, and apparatus are considered part of the art. In all examples shown and discussed herein, any specific values are to be interpreted as merely illustrative and not limiting. Thus, other examples of example embodiments can have different values. It is noted that like numbers and letters on the figures identify like parts throughout the several views, and thus, once an item is defined in one figure, it is not necessary to discuss it further in connection with other figures where it is understood that the item will be similarly constructed and function in the same manner.
[0023] In the description of the present application, it is to be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship is usually based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.
[0024] For purposes of the description hereinafter, spatial terms, such as "above", "below", "upper", "lower", and the like, can be used with reference to the exemplary illustrations as shown in the drawings. However, it will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the drawings. For example, if the device described is turned over, and a spatial term had been used, such as "above" or "below", then that spatial term can encompass both the orientations now stated. Therefore, the exemplary term "above" can encompass both a first orientation in which "above" is with respect to the device as shown in the drawings and a second orientation in which "above" is with respect to the device when turned over. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatial descriptions used herein interpreted accordingly.
[0025] In addition, it should be noted that the use of "first", "second", and the like words of distinction do not connote any actual physical or chronological order, but are used to distinguish one element from another. In addition, the use of the words "first", "second", and the like words of distinction do not connote any special order or priority, but are used to distinguish one element from another.
[0026] The utility model discloses a kind of expandable fusion cages, as shown in Figures 1-5 The utility model discloses a kind of expandable fusion cages, as shown in
[0027] Further, the end of the adjusting screw 3 is connected with a limiting sleeve 7, the limiting sleeve 7 is provided with a through hole 71 matched with the adjusting screw 3, and a clamping groove 72 matched with the end of the upper supporting block 1 and the lower supporting block 2, the limiting sleeve 7 is further provided with a groove 73 matched with the surgical tool, the upper surface of the upper supporting block 1 and the lower surface of the lower supporting block 2 are both provided with a sawtooth structure, so as to improve the holding force and stability.
[0028] In conclusion, the utility model provides a kind of fusion cage that can be expanded, height is adjustable, can select the appropriate height of expansion according to the specific needs of patient, so that the less goods during operation, can more save operation time and reduce operation risk, reduce operation cost expense, also have not easy to slip, fixed self-stabilizing, and small volume, implantation is convenient and so on Advantage, with great market value, it is worth widely popularizing and applying.
[0029] The above is only the preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art in the technical range disclosed by the utility model, according to the technical scheme and the utility model concept of the utility model, equivalent replacement or change, should be covered in the protection scope of the utility model.
Claims
1. A distractible cage, characterized by: The adjusting structure is arranged between the upper support block (1) and the lower support block (2), and comprises an adjusting screw (3) and a sliding sleeve (4) threadedly connected with the adjusting screw (3), the upper and lower sides of the sliding sleeve (4) are respectively connected with inclined grooves (6) on the upper support block (1) and the lower support block (2) through fixing pins (5), the sliding sleeve (4) can drive the fixing pins (5) to move left and right along the inclined grooves (6) under the action of the adjusting screw (3), so as to drive the upper support block (1) and the lower support block (2) to move towards each other or away from each other.
2. A distractible cage according to claim 1, characterized in that: The sliding sleeve (4) comprises a first sliding sleeve and a second sliding sleeve reversely threadedly connected with the adjusting screw (3), and the first sliding sleeve and the second sliding sleeve can move towards each other or away from each other under the action of the adjusting screw (3).
3. A distractible cage according to claim 2, wherein: The upper support block (1) and the lower support block (2) are respectively symmetrically provided with two groups of inclined grooves (6) matched with the fixing pins (5) on the first sliding sleeve and the second sliding sleeve.
4. A distractible cage according to claim 3, wherein: The two groups of inclined grooves (6) on the upper support block (1) are designed to be inclined from top to bottom in the direction away from each other, and the two groups of inclined grooves (6) on the lower support block (2) are designed to be inclined from bottom to top in the direction away from each other.
5. The expandable cage of claim 1, wherein: The end of the adjusting screw (3) is connected with a limiting sleeve (7), the limiting sleeve (7) is provided with a through hole (71) matched with the adjusting screw (3) and a clamping groove (72) matched with the end of the upper support block (1) and the lower support block (2).
6. A distractible cage according to claim 5, wherein: The limiting sleeve (7) is further provided with a groove (73) matched with the surgical tool.
7. The expandable cage of claim 1, wherein: The upper surface of the upper support block (1) and the lower surface of the lower support block (2) are both provided with sawtooth structures.