Spine fusion cage
By designing a spinal fusion device for support plate components, support components, adjusting components and limiting components, using 3D printing technology and tilt limiting structure, the existing spinal fusion device has solved the problems of complex structure, high cost and poor stability, and achieved low cost, high stability and precise adjustment.
Patent Information
- Application Number
- CN202422104581.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-28
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-08-28
AI Technical Summary
The existing spinal fusion devices have complex structure, high cost and poor stability, which affect the treatment effect.
A spinal fusion device including a support plate assembly, a support assembly, a adjusting member and a limiting assembly is designed. Through 3D printing technology, the limiting projections and limiting grooves are used to enhance structural strength and stability, and smooth adjustment is achieved through the meshing teeth and guide structure.
It reduces the manufacturing cost of spinal fusion devices, improves stability and adjustment stability, reduces damage to the spine, and achieves accurate height adjustment and stable fixation.
Smart Images
Figure CN223126700U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of medical devices, and particularly to a spinal fusion device. Background Art
[0002] As a medical device for treating spinal diseases, spinal fusion devices have been widely used. However, the structures of related spinal fusion devices are relatively complex and the manufacturing costs are relatively high; and when the spinal fusion device is in use, the stability of the spinal fusion device is relatively poor, and the treatment effects of some existing spinal fusion devices on patients are thus relatively poor. Summary of the Utility Model
[0003] Based on this, in view of the problems of the existing spinal fusion devices, such as complex structures, relatively high manufacturing costs, and relatively poor stability, it is necessary to provide a spinal fusion device.
[0004] A spinal fusion device, comprising:
[0005] A support plate assembly, the support plate assembly including a first support plate and a second support plate spaced apart along a first direction; the first support plate and the second support plate have a first end and a second end along a second direction, and the second direction is disposed at an angle to the first direction;
[0006] A support member assembly, the support member assembly including a first support member disposed at the first end and a second support member disposed at the second end; both the first support member and the second support member are in driving connection with the first support plate and the second support plate;
[0007] An adjusting member, the adjusting member being in driving connection with the first support member and the second support member; the adjusting member is capable of driving the first support member and the second support member to relatively approach or move away from each other along the second direction, so that the first support plate and the second support plate approach or move away from each other along the first direction;
[0008] Both the first support member and the second support member include support surfaces which are oppositely disposed in a V shape and are in contact with the first support plate and the second support plate; both the first support plate and the second support plate include mating surfaces which are in contact and cooperate with the corresponding support surfaces;
[0009] A limiting assembly, the limiting assembly including a limiting protrusion and a limiting groove which cooperate with each other; the support plate assembly is configured with the limiting protrusion, and the support member assembly is configured with the limiting groove; and / or the support plate assembly is configured with the limiting groove, and the support member assembly is configured with the limiting protrusion;
[0010] When the support plate assembly is in driving connection with the support member assembly, the limiting protrusion cooperates with the limiting groove; wherein, the first limiting surface on the limiting protrusion is not perpendicular to the first direction; the second limiting surface on the limiting groove abuts against the first limiting surface and is parallel thereto.
[0011] In some embodiments, the included angle θ1 between the first limiting surface and the first direction satisfies the condition that:
[0012] 0 < θ1 < 90°.
[0013] In some embodiments, a plurality of first engaging teeth are formed on each of the support surfaces;
[0014] A plurality of second engaging teeth that cooperate with the first engaging teeth are formed on each of the mating surfaces.
[0015] In some embodiments, both the first engaging teeth and the second engaging teeth include a first tooth surface and a second tooth surface;
[0016] The first tooth surface of the first engaging tooth cooperates with the first tooth surface of the second engaging tooth;
[0017] The second tooth surface of the first engaging tooth cooperates with the second tooth surface of the second engaging tooth;
[0018] Wherein, the second tooth surface of the first engaging tooth positionally supports the second tooth surface of the second engaging tooth, so that the positions of the first support plate and the second support plate in the first direction are relatively fixed; when the first support member and the second support member approach each other in the second direction, the first tooth surface of the first engaging tooth pushes against the first tooth surface of the second engaging tooth, so that the first support plate and the second support plate move away from each other in the first direction.
[0019] In some embodiments, a plurality of third engaging teeth are provided on the first limiting surface;
[0020] A plurality of fourth engaging teeth that cooperate with the third engaging teeth are formed on the second limiting surface;
[0021] When the first support member and the second support member move away from each other in the second direction, the third engaging teeth engage with the fourth engaging teeth.
[0022] In some embodiments, both the third engaging teeth and the fourth engaging teeth include a third tooth surface and a fourth tooth surface;
[0023] The third tooth surface of the third engaging tooth cooperates with the third tooth surface of the fourth engaging tooth;
[0024] The fourth tooth surface of the third engaging tooth cooperates with the fourth tooth surface of the fourth engaging tooth;
[0025] Wherein, when the first support member and the second support member move relatively away from each other in the second direction, the tooth surface three of the third engaging tooth pushes against the tooth surface three of the fourth engaging tooth, so that the first support plate and the second support plate approach each other in the first direction.
[0026] In some embodiments, the surfaces of the first support plate and the second support plate that abut against the bone are configured with anti-slip teeth and a porous structure.
[0027] In some embodiments, the adjusting member includes a threaded portion and a mating portion connected to each other;
[0028] An installation through hole is formed on the second support member;
[0029] The threaded portion is threadedly connected to the first support member; the mating portion is in clearance fit with the hole wall of the installation through hole.
[0030] In some embodiments, the installation through hole includes a first hole section, a second hole section, and a third hole section connected in sequence;
[0031] The aperture of the first hole section is larger than the aperture of the third hole section; the second hole section is located between the first hole section and the third hole section and includes a tapered surface section, and the tapered surface section is connected to the third hole section;
[0032] The mating portion is provided with a flange protruding radially outward; the flange is in fit with the tapered surface section.
[0033] In some embodiments, the second hole section further includes a diameter-changing section and a limiting section connected to each other;
[0034] One side of the diameter-changing section away from the limiting section is connected to the tapered surface section; one side of the limiting section away from the diameter-changing section is connected to the first hole section;
[0035] The spinal fusion device further includes a retaining ring, the retaining ring is sleeved on the side of the mating portion away from the threaded portion, and is connected to the diameter-changing section in a mating manner;
[0036] The limiting section is used to limit the movement of the retaining ring in the second direction.
[0037] In some embodiments, a planting window is formed on the first support plate;
[0038] A planting hole is formed on the second support member; the planting hole is communicated with the planting window.
[0039] In the above spinal fusion device, since one of the support plate assembly and the support member assembly is configured with a limiting protrusion and the other is configured with a limiting groove, when the adjusting member adjusts the distance between the first support plate and the second support plate in the first direction, it can be more stable under the cooperation of the first limiting surface and the second limiting surface, thereby reducing the damage to the spine. At the same time, since the first limiting surface on the limiting protrusion is not perpendicular to the first direction, and the second limiting surface on the limiting groove abuts against and is parallel to the first limiting surface, the first limiting surface and the second limiting surface are both inclined, which not only increases the contact area between the limiting protrusion and the limiting groove, but also enhances the structural strength of the limiting protrusion and the limiting groove; at the same time, when the first support plate and the second support plate are processed and prepared by 3D printing, the limiting protrusion and the limiting groove can also be better formed due to the inclined setting, without the need to additionally provide support columns, with small dimensional errors and high fitting accuracy, and the manufacturing cost of the entire spinal fusion device is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS
[0040] Figure 1 FIG. 1 is a first schematic diagram of a spinal fusion device provided by some embodiments of the present application.
[0041] Figure 2 is Figure 1 a second schematic diagram of the spinal fusion device shown in FIG.
[0042] Figure 3 is Figure 2 a cross-sectional view taken along line A-A of the spinal fusion device shown in FIG.
[0043] Figure 4 is Figure 1 a third schematic diagram of the spinal fusion device shown in FIG.
[0044] Figure 5 is Figure 1 an exploded view of the spinal fusion device shown in FIG.
[0045] Figure 6 is Figure 1 a schematic diagram of the first support plate in the spinal fusion device shown in FIG.
[0046] Figure 7 is Figure 1 a first schematic diagram of the second support plate in the spinal fusion device shown in FIG.
[0047] Figure 8 is Figure 1 a second schematic diagram of the second support plate in the spinal fusion device shown in FIG.
[0048] Figure 9 is Figure 1 a third schematic diagram of the second support plate in the spinal fusion device shown in FIG.
[0049] Figure 10Schematic diagram of the first support member in the spinal fusion device shown in Figure 1
[0050] Figure 11 Schematic diagram of the second support member in the spinal fusion device shown in Figure 1
[0051] Figure 12 Cross-sectional view taken along line B-B shown in Figure 11
[0052] Figure 13 Cross-sectional view taken along line C-C shown in Figure 11
[0053] Figure 14 Front view shown in Figure 13
[0054] Figure 15 Schematic diagram of the retaining ring in the spinal fusion device shown in Figure 5
[0055] Figure 16 Schematic diagram of the first position where the retaining ring in the spinal fusion device is installed on the adjusting member and the second support member shown in Figure 5
[0056] Figure 17 Schematic diagram of the second position where the retaining ring in the spinal fusion device is installed on the adjusting member and the second support member shown in Figure 5
[0057] Figure 18 Schematic diagram of the internal structure where the retaining ring in the spinal fusion device is installed on the adjusting member and the second support member shown in Figure 5
[0058] Figure 19 Schematic diagram of the spinal fusion device provided by some other embodiments of the present application.
[0059] Figure 20 Schematic diagram of the spinal fusion device provided by some other embodiments of the present application.
[0060] Reference numerals:
[0061] 100 - Support plate assembly; 110 - First support plate; 111 - First support sub - plate; 112 - Second support sub - plate; 120 - Second support plate; 121 - Third support sub - plate; 122 - Fourth support sub - plate; 123 - Reinforcing rib; 130 - Support surface; 131 - First meshing tooth; 140 - Implant injection window; 150 - Guide block; 151 - First avoidance gap; 160 - Guide groove; 161 - Second avoidance gap; 171 - Anti - slip tooth; 172 - Porous structure;
[0062] 200-support member assembly; 210-first support member; 220-second support member; 221-mounting through hole; 2211-first hole section; 2212-second hole section; 22121-conical surface section; 22122-diameter reducing section; 221221-limiting depression; 221222-limiting convex point; 22123-limiting section; 2213-third hole section; 222-implantation hole; 223-clamping groove; 230-matching surface; 231-second meshing tooth;
[0063] 300-adjusting member; 310-threaded portion; 320-matching portion; 321-flange;
[0064] 400-limiting protrusion; 410-first limiting surface; 411-third meshing tooth;
[0065] 500-limiting groove; 510-second limiting surface; 511-fourth meshing tooth;
[0066] 600- retaining ring; 610- limiting protrusion;
[0067] 710-tooth surface one; 720-tooth surface two; 730-tooth surface three; 740-tooth surface four. DETAILED DESCRIPTION
[0068] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.
[0069] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.
[0070] In addition, if the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.
[0071] In this application, unless otherwise clearly specified and limited, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0072] In this application, unless otherwise clearly specified and limited, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0073] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for illustrative purposes and do not represent the only implementation.
[0074] Refer to Figure 1 、 Figure 2 、 Figure 4 and in combination with Figure 3 and Figure 5 , Figure 1 Figure 1 shows a first schematic diagram of a spinal fusion device provided by some embodiments of this application. Figure 2 shows Figure 1 a second schematic diagram of the spinal fusion device shown inFigure 3 shows Figure 2 A cross-sectional view taken along A-A as shown Figure 4 shows Figure 1 A third schematic view of the spinal fusion device as shown Figure 5 shows Figure 1 An exploded view of the spinal fusion device as shown
[0075] The spinal fusion device provided by an embodiment of the present application includes a support plate assembly 100, a support member assembly 200, an adjusting member 300, and a limiting assembly. The support plate assembly 100 includes a first support plate 110 and a second support plate 120 that are spaced apart along a first direction; specifically, the first direction is Figures 1 - 4 the zz' direction in Figures 1 - 4 ; the first support plate 110 and the second support plate 120 have a first end and a second end along a second direction, and the second direction is arranged at an angle to the first direction; specifically, the second direction is
[0076] the xx' direction in
[0077] The support member assembly 200 includes a first support member 210 disposed at the first end and a second support member 220 disposed at the second end; both the first support member 210 and the second support member 220 are in driving connection with the first support plate 110 and the second support plate 120; the adjusting member 300 is in driving connection with the first support member 210 and the second support member 220; the adjusting member 300 is capable of driving the first support member 210 and the second support member 220 to move relatively closer to or away from each other along the second direction, so that the first support plate 110 and the second support plate 120 move closer to or away from each other along the first direction; both the first support member 210 and the second support member 220 include support surfaces 130 that are oppositely arranged in a V shape and are in contact with the first support plate 110 and the second support plate 120; both the first support plate 110 and the second support plate 120 include mating surfaces 230 that are in contact and cooperate with the corresponding support surfaces 130.
[0078] In the above spinal fusion device, since one of the support plate assembly 100 and the support member assembly 200 is configured with a limiting protrusion 400 and the other is configured with a limiting groove 500, when the adjusting member 300 adjusts the distance between the first support plate 110 and the second support plate 120 in the first direction, it can be more stable under the cooperation of the first limiting surface 410 and the second limiting surface 510, thereby reducing the damage to the spine. At the same time, since the first limiting surface 410 on the limiting protrusion 400 is not perpendicular to the first direction, and the second limiting surface 510 on the limiting groove 500 abuts against and is parallel to the first limiting surface 410, the first limiting surface 410 and the second limiting surface 510 are both inclined, which not only increases the contact area between the limiting protrusion 400 and the limiting groove 500, but also enhances the structural strength of the limiting protrusion 400 and the limiting groove 500; at the same time, when the first support plate 110 and the second support plate 120 are processed and prepared by 3D printing, the limiting protrusion 400 and the limiting groove 500 can also be better formed due to the inclined setting, without the need to additionally provide support columns, with smaller dimensional errors and higher fitting accuracy, and the manufacturing cost of the entire spinal fusion device is lower.
[0079] In one embodiment, the second direction is perpendicular to the first direction, and the included angle between the two is 90°. Of course, in other embodiments, the included angle between the second direction and the first direction can also be 75° or 60°, etc., and no special limitation is made thereto.
[0080] In some embodiments, the spinal fusion device includes four groups of limiting components. One of the limiting protrusion 400 and the limiting groove 500 in each group of limiting components is arranged on the support plate assembly 100, and the other is arranged on the support member assembly 200. Therefore, when there are four groups of limiting components, two limiting protrusions 400 and two limiting grooves 500 can be arranged on the support plate assembly 100. And two limiting protrusions 400 and two limiting grooves 500 are also arranged on the support member assembly 200.
[0081] The spinal fusion device provided by the present application can be processed by 3D printing, and does not require additional setting of many support columns. At the same time, since 3D printing can process relatively complex internal structures, the functions of the product are relatively rich. This spinal fusion device is not only convenient to process, but also improves the stability of the entire product, and at the same time has a lower manufacturing cost.
[0082] The following specifically describes the structure of the spinal fusion device. Please refer to Figures 6 - 20 , Figure 6 shows Figure 1 a schematic diagram of the first support plate 110 in the spinal fusion device shown. Figure 7 shows Figure 1 a first schematic diagram of the second support plate 120 in the spinal fusion device shown. Figure 8Shows Figure 1 A second schematic view of the second support plate 120 in the spinal fusion device shown. Figure 9 Shows Figure 1 A third schematic view of the second support plate 120 in the spinal fusion device shown. Figure 10 Shows Figure 1 A schematic view of the first support member 210 in the spinal fusion device shown. Figure 11 Shows Figure 1 A schematic view of the second support member 220 in the spinal fusion device shown. Figure 12 Shows Figure 11 A cross-sectional view taken along line B-B shown. Figure 13 Shows Figure 11 A cross-sectional view taken along line C-C shown. Figure 14 Shows Figure 13 The front view shown. Figure 15 Shows Figure 5 A schematic view of the retaining ring 600 in the spinal fusion device shown. Figure 16 Shows Figure 5 A first schematic view of the retaining ring 600 in the spinal fusion device shown mounted to the adjusting member 300 and the second support member 220. Figure 17 Shows Figure 5 A second schematic view of the retaining ring 600 in the spinal fusion device shown mounted to the adjusting member 300 and the second support member 220. Figure 18 Shows Figure 5 A schematic view of the internal structure of the retaining ring 600 in the spinal fusion device shown mounted to the adjusting member 300 and the second support member 220. Figure 19 Shows a schematic view of a spinal fusion device provided in some other embodiments of the present application. Figure 20 Shows a schematic view of a spinal fusion device provided in some other embodiments of the present application.
[0083] Please refer to Figure 3 , in some of these embodiments, the angle θ1 between the first limiting surface 410 and the first direction satisfies the condition: 0 < θ1 ≤ 90°. By setting θ1 within a reasonable range greater than 0° and less than or equal to 90°, the inclination of the first limiting surface 410 relative to the first direction is within a relatively reasonable range, facilitating the machining of the limiting groove 500 and the limiting protrusion 400 when processing the spinal fusion device by 3D printing, and reducing the number of support columns that need to be added during the 3D printing preparation process.
[0084] Please refer to Figure 3, in some embodiments, the angle θ1 between the first limiting surface 410 and the first direction satisfies the condition: 30° ≤ θ1 ≤ 50°. By setting θ1 within a reasonable range greater than or equal to 30° and less than or equal to 50°, the inclination of the first limiting surface 410 relative to the first direction is within a relatively reasonable range, facilitating the processing of the limiting groove 500 and the limiting protrusion 400 when manufacturing the spinal fusion device by 3D printing, and further reducing the number of support columns that need to be added during the 3D printing preparation process. In one specific embodiment, θ1 is 30°. In another specific embodiment, θ1 is 50°. In still another specific embodiment, θ1 is 40°.
[0085] Please refer to Figure 3 , Figure 5 , Figure 6 , in some embodiments, the first support plate 110 includes a first support sub - plate 111 and two second support sub - plates 112 installed on the first support sub - plate 111 and arranged on both sides along the third direction; the third direction is set at an angle with the first direction; and the third direction is set at an angle with the second direction; specifically, the third direction is the Figure 3 yy' direction in Figures 1 - 4 ; the second support plate 120 includes a third support sub - plate 121 and two fourth support sub - plates 122 installed on the third support sub - plate 121 and arranged on both sides along the third direction; the first support sub - plate 111 and the third support sub - plate 121 are arranged opposite to each other along the first direction; the second support sub - plates 112 and the fourth support sub - plates 122 are arranged in relative cooperation along the first direction. By arranging the second support sub - plates 112 and the fourth support sub - plates 122 opposite and in cooperation along the first direction, that is, the Figures 1 - 4 zz' direction in
[0086] , during the process of adjusting the height of the spinal fusion device, the second support sub - plates 112 and the fourth support sub - plates 122 can slide relative to each other, thereby realizing the adjustment, and the adjustment process is relatively stable.
[0087] Please refer to Figures 7 - 9, in some embodiments, reinforcing ribs 123 are further provided on the first support plate 110 and the second support plate 120. The reinforcing ribs 123 are connected between two second support sub - plates 112 and between two fourth support sub - plates 122, so that the first support plate 110 and the second support plate 120 have better stability, the second support sub - plates 112 and the fourth support sub - plates 122 are not easily deformed, and thus the spinal fusion device is not easily deformed during use and has better stability.
[0088] Please refer to Figure 5 and combine with Figure 6 and Figure 7 , in some embodiments, one of the first support plate 110 and the second support plate 120 is configured with a guide block 150, and the other is configured with a guide groove 160; the guide block 150 cooperates with the guide groove 160. When the first support plate 110 and the second support plate 120 move in the first direction, the guide block 150 can slide in the guide groove 160, so that their movement process is more stable and not easily deviate left and right in the second direction.
[0089] Please refer to Figure 5 and Figure 6 , in a specific embodiment, the first support plate 110 is configured with a guide block 150, and the second support plate 120 is configured with a guide groove 160. One side of the guide block 150 away from the first support sub - plate 111 is configured with a first avoidance gap 151, and one side of the guide groove 160 away from the third support sub - plate 121 is configured with a second avoidance gap 161. By respectively arranging the first avoidance gap 151 and the second avoidance gap 161 at the head and tail parts of the guide block 150 and the guide groove 160, the first support plate 110 and the second support plate 120 can better adapt to the 3D printing process during 3D printing.
[0090] Please refer to Figures 3 - 5 , in some embodiments, a plurality of first engaging teeth 131 are configured on each support surface 130; a plurality of second engaging teeth 231 that cooperate with the first engaging teeth 131 are configured on each mating surface 230. Through the combined meshing action of the first engaging teeth 131 and the second engaging teeth 231, when the support surface 130 and the mating surface 230 are in the process of cooperating and driving with each other, the height of the spinal fusion device can be gradually lifted through the meshing action between the tooth surfaces, and then the adjustment height of the height of the spinal fusion device can be set in advance as a relatively stable stepped adjustment method. After the final adjustment is completed, it can also be locked through the tooth surfaces of the first engaging teeth 131 and the second engaging teeth 231, so that the adjusted spinal fusion device has higher stability.
[0091] Please refer to Figure 6 , Figure 7 andFigure 10 , in some embodiments, both the first engaging tooth 131 and the second engaging tooth 231 include a first tooth surface 710 and a second tooth surface 720. The first tooth surface 710 of the first engaging tooth 131 cooperates with the first tooth surface 710 of the second engaging tooth 231; the second tooth surface 720 of the first engaging tooth 131 cooperates with the second tooth surface 720 of the second engaging tooth 231. Among them, the second tooth surface 720 of the first engaging tooth 131 positions and supports the second tooth surface 720 of the second engaging tooth 231, so that the positions of the first support plate 110 and the second support plate 120 in the first direction are relatively fixed. When the first support member 210 and the second support member 220 approach each other relatively in the second direction, the first tooth surface 710 of the first engaging tooth 131 pushes against the first tooth surface 710 of the second engaging tooth 231, so that the first support plate 110 and the second support plate 120 move away from each other in the first direction. Through the mutual cooperation of the first tooth surface 710 and the second tooth surface 720, when the first support member 210 and the second support member 220 approach each other relatively in the second direction, the first support plate 110 and the second support plate 120 can move away from each other by the mutual pushing of the first tooth surfaces 710. During the adjustment process of the entire spinal fusion device, it is more stable.
[0092] In one specific embodiment, the included angle θ2 between the first tooth surface 710 and the second direction is greater than 0°, so that the first engaging tooth 131 and the second engaging tooth 231 are stepped structures with an angle. When subjected to cyclic compression, a claw-like structure composed of steps can first bear the load and firmly grasp the support structure, solving the problems of poor anti-loosening performance and height reduction of traditional spinal fusion devices. Specifically, the included angle θ2 between the first tooth surface 710 and the second direction can be 8°, 10°, 12°, etc.
[0093] Please refer to Figure 7 , Figure 8 and Figure 11 , in some embodiments, the first limiting surface 410 is provided with a plurality of third engaging teeth 411; a plurality of fourth engaging teeth 511 that cooperate with the third engaging teeth 411 are formed on the second limiting surface 510. When the first support member 210 and the second support member 220 move away from each other relatively in the second direction, the third engaging teeth 411 engage with the fourth engaging teeth 511. Through the combined engagement of the third engaging teeth 411 and the fourth engaging teeth 511, when the first limiting surface 410 and the second limiting surface 510 cooperate and drive each other, a step-by-step sliding adjustment can be achieved through the meshing between the tooth surfaces, so that the height adjustment of the spinal fusion device can be set in advance to a relatively stable stepped adjustment method.
[0094] Please refer to Figure 7 , Figure 8 and Figure 11, in some embodiments, both the third engaging tooth 411 and the fourth engaging tooth 511 include a third tooth surface 720 and a fourth tooth surface 740; the third tooth surface 730 of the third engaging tooth 411 cooperates with the third tooth surface 730 of the fourth engaging tooth 511; the fourth tooth surface 740 of the third engaging tooth 411 cooperates with the fourth tooth surface 740 of the fourth engaging tooth 511; wherein, when the first support member 210 and the second support member 220 move relatively away from each other in the second direction, the third tooth surface 730 of the third engaging tooth 411 pushes against the third tooth surface 730 of the fourth engaging tooth 511, so that the first support plate 110 and the second support plate 120 move closer to each other in the first direction. Through the cooperation of the third tooth surface 730 and the fourth tooth surface 740 with each other, when the first support member 210 and the second support member 220 move relatively away from each other in the second direction, the first support plate 110 and the second support plate 120 can be made to move closer to each other by the mutual pushing of the third tooth surfaces 730. During the adjustment process of the entire spinal fusion device, it is more stable.
[0095] In one specific embodiment, the angle θ4 between the third tooth surface 730 and the second direction is the same as the angle θ2 between the first tooth surface 710 and the second direction, and the angle θ5 between the fourth tooth surface 740 and the second direction is the same as the angle θ3 between the second tooth surface 720 and the second direction. By setting it like this, during the adjustment process, the tooth surface angles of the engaging teeth on the support surface 130 and the mating surface 230 are the same as those of the engaging teeth on the limiting protrusion 400 and the limiting groove 500, and the adjustment angles of the entire spinal fusion device are the same, making it not easy to get stuck, and the smoothness of the adjustment process is relatively high.
[0096] In this application, by setting the height of each tooth surface of the engaging tooth 700 and the height of each tooth surface of the guiding tooth 410, the height adjustment of the spinal fusion device can be achieved in a stepped manner, with each step being 1 mm, so the adjustment of the height is more accurate.
[0097] In some embodiments, when the first tooth surfaces 710 abut against each other, the third tooth surfaces 730 are separated from each other; when the second tooth surfaces 720 abut against each other, the fourth tooth surfaces 740 are separated from each other. By setting it like this, during the entire sliding process, it is only necessary to ensure that the tooth surfaces of one of the mating surface 230 and the limiting protrusion 400 are in an abutting state, avoiding the jamming phenomenon that occurs during the sliding process when both of them are in an abutting state at the same time.
[0098] Please refer to Figures 2 - 6, in one embodiment, on the surfaces of the first support plate 110 and the second support plate 120 that abut against the bone, that is, on the side of the first support sub - plate 111 facing away from the second support sub - plate 112, anti - slip teeth are formed, and on the side of the third support sub - plate 121 facing away from the fourth support sub - plate 122, anti - slip teeth 171 are formed. By providing the anti - slip teeth 171, when the first support plate 110 and the second support plate 120 are in contact with the bone, the friction at their contact area is relatively large, and relative sliding is not likely to occur. Furthermore, when the spinal fusion device is implanted into the patient's body and the installation position is adjusted, it is more stable.
[0099] Please refer to Figure 2 and Figure 4 , in one embodiment, on the surfaces of the first support plate 110 and the second support plate 120 that abut against the bone, that is, porous structures 172 are formed on the first support sub - plate 111 and the third support sub - plate 121. By setting it in this way, the performance of bone ingrowth is improved, which has a promoting effect on the spinal fusion of the patient.
[0100] Please refer to Figure 5 , in some embodiments, the adjusting member 300 includes a threaded portion 310 and a mating portion 320 connected to each other; please refer to Figure 5 、 Figure 12 、 Figure 18 , an installation through - hole 221 is formed on the second support member 220; the threaded portion 310 is used to pass through the installation through - hole 221 and is threadedly connected to the first support member 210; the mating portion 320 is in clearance fit with the hole wall of the installation through - hole 221. By providing the threaded portion 310 on the adjusting member 300, by screwing the adjusting member 300, the first support member 210 can be moved back and forth, and then drive the first support plate 110 and the second support plate 120 to move up and down, so as to adjust the height of the spinal fusion device.
[0101] In this application, by providing the first engaging teeth 231 on the mating surface 230 and the third engaging teeth 411 on the first limiting surface 410 of the limiting protrusion 400, during the up - and - down adjustment process of the spinal fusion device, the threaded portion 310 will not be continuously subjected to a large force, which may cause damage to the threaded portion 310 or the threaded portion 310 rotates by itself, and then the height of the spinal fusion device decreases, affecting the patient.
[0102] Please refer to Figure 18 , in some embodiments, the installation through - hole 221 includes a first hole section 2211, a second hole section 2212, and a third hole section 2213 connected in sequence; the aperture of the first hole section 2211 is larger than the aperture of the third hole section 2213, and the second hole section 2212 is located between the first hole section 2211 and the third hole section 2213 and includes a tapered surface section 22121 ( Figure 12), the conical surface section 22121 is connected to the third hole section 2213; the engaging portion 320 is radially outwardly convex with a flange 321 ( Figure 18 ); the flange 321 is engaged with the conical surface section 22121. By such an arrangement, when the adjusting member 300 is installed into the installation through hole 221, the adjusting member 300 is not easily slipped out by the limitation of the conical surface section 22121 and the flange 321. At the same time, the third hole section 2213 and the second hole section 2212 are transitioned by the conical surface section 22121, so that it is easy to process and prepare during the 3D printing process.
[0103] Please refer to Figure 12 , in some embodiments, the second hole section 2212 further includes a reduced diameter section 22122 and a limiting section 22123 that are connected to each other; one side of the reduced diameter section 22122 away from the limiting section 22123 is connected to the conical surface section 22121; one side of the limiting section 22123 away from the reduced diameter section 22122 is connected to the first hole section 2211; Please refer to Figure 5 and Figures 15 - 18 , in some embodiments, the spinal fusion device further includes a retaining ring 600, the retaining ring 600 is sleeved on the engaging portion 320, and the retaining ring 600 is sleeved on the side of the engaging portion 320 away from the threaded portion 310 and is connected to the reduced diameter section 22122 in a matching manner; the limiting section 22123 is used to limit the movement of the retaining ring 600 in the second direction. By providing the retaining ring 600 and making the retaining ring 600 connected to the reduced diameter section 22122 in a matching manner, and the limiting section 22123 limits the movement of the retaining ring 600 in the second direction, the retaining ring 600 can limit the front and back sliding of the adjusting member 300 in the axial direction, making the adjustment process of the spinal fusion device more stable.
[0104] In one specific embodiment, the aperture of the reduced diameter section 22122 is larger than the aperture of the limiting section 22123, and the reduced diameter section 22122 and the limiting section 22123 jointly enclose a clamping groove; the retaining ring 600 can be received in the clamping groove formed by the reduced diameter section 22122 and the limiting section 22123 and is clamped to the reduced diameter section 22122.
[0105] Please refer to Figure 14 、 Figure 16 and Figure 17, in some embodiments, at least one limiting recess 221221 is formed on the inner side wall of the diameter-changing section 22122 close to the hole cavity; at least one limiting protrusion 610 is formed on the outer peripheral wall of the retaining ring 600; when the retaining ring 600 rotates to a preset position, the limiting recess 221221 is clamped between two adjacent limiting protrusions 610. Through the cooperation of the limiting groove and the limiting protrusion 610, the adjusting member 300 can be clamped with the retaining ring 600, which not only makes the assembly process of the two more convenient, but also makes it difficult for the adjusting member 300 to move axially relative to the first support member 210 and the second support member 220 and separate after the assembly is completed.
[0106] Please refer to Figures 15 - 17 , in some embodiments, the number of the limiting recesses 221221 is multiple groups, and the multiple groups of limiting recesses 221221 are symmetrically arranged in the circumferential direction; limiting convex points 221222 are provided on both sides of each group of limiting recesses 221221; the number of the limiting protrusions 610 is multiple groups, and the multiple groups of limiting protrusions 610 are symmetrically arranged in the circumferential direction and correspond to the multiple groups of limiting recesses 221221 one by one; when the retaining ring 600 rotates to a preset angle, the limiting protrusion 610 can cross the limiting convex point 221222 and be clamped in one of the groups of limiting recesses 221221. By providing multiple groups of limiting recesses 221221 and limiting protrusions 610, the clamping of the adjusting member 300 and the retaining ring 600 can achieve multiple-location limiting clamping, and the two are more stable in the clamped state.
[0107] In one specific embodiment, each group of limiting recesses 221221 has one, and each group of limiting protrusions 610 has two. Of course, in other embodiments, each group of limiting recesses 221221 can also have two or three, and each group of limiting protrusions 610 can have one or three, etc., and no special limitation is made thereto.
[0108] Please refer to Figure 4 、 Figure 5 and Figure 11 , in some embodiments, a clamping groove 223 is further formed at one end of the second support member 220 away from the first support member 210 and is arranged on both sides along the third direction and is open along the second direction and the third direction; the third direction is arranged at an angle with the first direction and the second direction; specifically, the third direction is the Figure 4 yy' direction in
[0109] In one specific embodiment, the bottom wall of the clamping groove 223 is an arc surface, so that during the 3D printing process, it is not necessary to add a support column here, which is convenient for processing and preparation.
[0110] Please refer to Figures 2 - 4 and Figure 6 , in some embodiments, an implantation window 140 is constructed on the first support plate 110; please refer to Figure 11 , in some embodiments, an implantation hole 222 is constructed on the second support member 220; the implantation hole 222 is communicated with the implantation window 140. By providing the mutually communicated implantation window 140 and implantation hole 222, it is convenient to implant bone graft materials.
[0111] Please refer to Figure 1 , Figure 19 and Figure 20 , in this application, by setting different angles, for example, setting the height dimensions of the first support member 210 and the second support member 220 to be different, so that when the spinal fusion device is expanded, it can be Figure 1 shown as 0° in Figure 19 , that is, the heights at both ends along the xx' direction are the same; it can also be Figure 20 8° in
[0112] or 18° in
[0113] , that is, the heights at both ends along the xx' direction are different. It should be noted that there is no limitation on this, and the expansion angle of the spinal fusion device can be adaptively adjusted according to the actual situation and processed by 3D printing. The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification. The above-described embodiments only represent several implementation manners of this application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of this application, several deformations and improvements can still be made, and these all belong to the protection scope of this application. Therefore, the protection scope of the patent of this application should be subject to the appended claims.
Claims
1. A spinal fusion device, characterized in that, The spinal fusion device includes: A support plate assembly (100), the support plate assembly (100) includes a first support plate (110) and a second support plate (120) spaced apart along a first direction; the first support plate (110) and the second support plate (120) have a first end and a second end in a second direction, and the second direction is set at an angle to the first direction; A support member assembly (200), the support member assembly (200) includes a first support member (210) provided at the first end and a second support member (220) provided at the second end; both the first support member (210) and the second support member (220) are in driving connection with the first support plate (110) and the second support plate (120); An adjusting member (300), the adjusting member (300) is in driving connection with the first support member (210) and the second support member (220); the adjusting member (300) is capable of driving the first support member (210) and the second support member (220) to approach or move away from each other along the second direction, so that the first support plate (110) and the second support plate (120) approach or move away from each other along the first direction; Both the first support member (210) and the second support member (220) include support surfaces (130) that are oppositely arranged in a V shape and are in contact with the first support plate (110) and the second support plate (120); both the first support plate (110) and the second support plate (120) include mating surfaces (230) that are in contact and cooperate with the corresponding support surfaces (130); A limiting assembly, the limiting assembly includes a limiting protrusion (400) and a limiting groove (500) that cooperate with each other; the support plate assembly (100) is configured with the limiting protrusion (400), and the support member assembly (200) is configured with the limiting groove (500); and / or the support plate assembly (100) is configured with the limiting groove (500), and the support member assembly (200) is configured with the limiting protrusion (400); When the support plate assembly (100) is in driving connection with the support member assembly (200), the limiting protrusion (400) cooperates with the limiting groove (500); wherein, a first limiting surface (410) on the limiting protrusion (400) is not perpendicular to the first direction; a second limiting surface (510) on the limiting groove (500) abuts against and is parallel to the first limiting surface (410).
2. The spinal fusion device according to claim 1, wherein The included angle θ1 between the first limiting surface (410) and the first direction satisfies the condition: 0 < θ1 < 90°.
3. The spinal fusion device according to claim 1, wherein A plurality of first engaging teeth (131) are formed on each of the support surfaces (130); A plurality of second engaging teeth (231) that cooperate with the first engaging teeth (131) are formed on each of the mating surfaces (230).
4. The spinal fusion device according to claim 3, characterized in that, Both the first engaging teeth (131) and the second engaging teeth (231) include a first tooth surface (710) and a second tooth surface (720); The first mating tooth surface (710) of the first mating tooth (131) mates with the first mating tooth surface (710) of the second mating tooth (231); The second mating tooth surface (720) of the first mating tooth (131) mates with the second mating tooth surface (720) of the second mating tooth (231); Wherein, the second mating tooth surface (720) of the first mating tooth (131) positions and supports the second mating tooth surface (720) of the second mating tooth (231), so that the positions of the first support plate (110) and the second support plate (120) in the first direction are relatively fixed; when the first support member (210) and the second support member (220) approach each other relatively in the second direction, the first mating tooth surface (710) of the first mating tooth (131) pushes against the first mating tooth surface (710) of the second mating tooth (231), so that the first support plate (110) and the second support plate (120) move away from each other in the first direction.
5. The spinal fusion device according to claim 1, characterized in that, A plurality of third mating teeth (411) are provided on the first limiting surface (410); A plurality of fourth mating teeth (511) that cooperate with the third mating teeth (411) are formed on the second limiting surface (510); When the first support member (210) and the second support member (220) move away from each other relatively in the second direction, the third mating teeth (411) engage with the fourth mating teeth (511).
6. The spinal fusion device according to claim 5, wherein, Both the third mating teeth (411) and the fourth mating teeth (511) include a third tooth surface (730) and a fourth tooth surface (740); The third tooth surface (730) of the third mating tooth (411) mates with the third tooth surface (730) of the fourth mating tooth (511); The fourth tooth surface (740) of the third mating tooth (411) mates with the fourth tooth surface (740) of the fourth mating tooth (511); Wherein, when the first support member (210) and the second support member (220) move away from each other relatively in the second direction, the third tooth surface (730) of the third mating tooth (411) pushes against the third tooth surface (730) of the fourth mating tooth (511), so that the first support plate (110) and the second support plate (120) approach each other in the first direction.
7. The spinal fusion device according to claim 1, wherein The surfaces of the first support plate (110) and the second support plate (120) that abut against the bone are formed with anti-slip teeth (171) and a porous structure (172).
8. The spinal fusion device according to claim 1, wherein The adjusting member (300) includes a threaded portion (310) and a mating portion (320) connected to each other; An installation through hole (221) is formed on the second support member (220); The threaded portion (310) passes through the installation through hole (221) and is threadedly connected to the first support member (210); the mating portion (320) is in clearance fit with the hole wall of the installation through hole (221).
9. The spinal fusion device according to claim 8, wherein, The installation through hole (221) includes a first hole section (2211), a second hole section (2212) and a third hole section (2213) connected in sequence; The aperture of the first hole section (2211) is larger than that of the third hole section (2213); the second hole section (2212) is located between the first hole section and the third hole section and includes a tapered surface section (22121), and the tapered surface section (22121) is connected to the third hole section (2213); The fitting part (320) is radially outwardly convex with a flange (321); the flange (321) is fitted with the tapered surface section (22121).
10. The spinal fusion device according to claim 9, wherein, The second hole section (2212) further includes a diameter-changing section (22122) and a limiting section (22123) connected to each other; One side of the diameter-changing section (22122) away from the limiting section (22123) is connected to the tapered surface section (22121); one side of the limiting section (22123) away from the diameter-changing section (22122) is connected to the first hole section (2211); The spinal fusion device further includes a retaining ring (600), and the retaining ring (600) is sleeved on one side of the fitting part (320) away from the threaded part (310) and is connected to the diameter-changing section (22122) in a matching manner; The limiting section (22123) is used to limit the movement of the retaining ring (600) along the second direction.
11. The spinal fusion device according to any one of claims 1-10, characterized in that, A planting window (140) is formed on the first support plate (110); A planting hole (222) is formed on the second support member (220); the planting hole (222) communicates with the planting window (140).