Spinal Fusion Cage

Abstract

The present application relates to a spinal fusion device, which includes a first support plate, a second support plate, a support assembly and an adjusting member. The first and second support plates are spaced apart in a first direction and have a first end and a second end in a second direction; the support assembly includes a first support member arranged at the first end and a second support member arranged at the second end; the adjusting member is transmission-connected with the first support member and the second support member, and the adjusting member drives the first support member and the second support member to move closer to or farther from each other in the second direction, so that the first support plate and the second support plate move closer to or farther from each other in the first direction; wherein the first support plate, the second support plate, the first support member and the second support member all have mating surfaces, and the first support plate mating surface and the second support plate mating surface are arranged oppositely and at an angle; the first support plate mating surface is used to match with the first support member mating surface and the second support member mating surface; the second support plate mating surface is used to match with the first support member mating surface and the second support member mating surface.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a spinal fusion device. Background Art

[0002] Spinal fusion devices are widely used as medical devices for the treatment of spinal diseases. However, the structure of the spinal fusion devices is relatively complex and the cost is relatively high. In addition, when the spinal fusion devices are implanted in the spine, the adaptability of the spinal fusion devices to the spine is poor, resulting in poor treatment effects on patients. Summary of the invention

[0003] Based on this, it is necessary to provide a spinal fusion device to address the problems that the existing spinal fusion devices have a complex structure and high cost, and when the spinal fusion device is implanted in the spine, the spinal fusion device has poor adaptability to the spine, resulting in poor treatment effect for patients.

[0004] A spinal fusion cage, characterized in that the spinal fusion cage comprises:

[0005] a first support plate;

[0006] A second support plate, wherein the second support plate and the first support plate are spaced apart along a first direction, and the first support plate and the second support plate have a first end and a second end in a second direction, and the second direction is arranged at an angle to the first direction;

[0007] a support assembly, the support assembly comprising a first support member disposed at the first end and a second support member disposed at the second end;

[0008] an adjusting member, the adjusting member being in transmission connection with the first supporting member and the second supporting member, the adjusting member being capable of driving the first supporting member and the second supporting member to move relatively closer to or farther away from each other along the second direction, so that the first supporting plate and the second supporting plate move closer to or farther away from each other along the first direction;

[0009] Among them, the first support plate, the second support plate, the first support member and the second support member all have mating surfaces, and the mating surface of the first support plate and the mating surface of the second support plate are opposite to each other and are set at an angle; the mating surface of the first support plate is used to cooperate with the mating surface of the first support member and the mating surface of the second support member; the mating surface of the second support plate is used to cooperate with the mating surface of the first support member and the mating surface of the second support member.

[0010] In one embodiment, the first support member is configured with a first surface and a second surface which are arranged at an angle to the second direction; the first surface cooperates with the matching surface of the first support plate, and the second surface cooperates with the matching surface of the second support plate;

[0011] The second support member is configured with a third surface and a fourth surface which are arranged at an angle to the second direction; the third surface cooperates with the matching surface of the first support plate, and the fourth surface cooperates with the matching surface of the second support plate;

[0012] When the first support member and the second support member move along the second direction, the matching surface of the first support plate and the matching surface of the second support plate slide relatively.

[0013] In one embodiment, the mating surfaces of the first support plate and the second support plate have a first section and a second section, the dimension of the first section along the third direction is smaller than the dimension of the second section along the third direction, and the second section along the third direction is connected to the first section, and the third direction is set at an angle to both the first direction and the second direction;

[0014] The first support plate and the second support plate are also configured with a fifth surface, the fifth surface is arranged adjacent to the first section along the third direction, one end of the fifth surface is arranged away from the support assembly, and the other end of the fifth surface is connected to the remaining part of the second section.

[0015] In one embodiment, meshing teeth are configured on the mating surfaces of the first support plate, the second support plate, the first support member, and the second support member.

[0016] In one embodiment, the meshing teeth include a first meshing tooth surface and a second meshing tooth surface, and the first meshing tooth surface and the second meshing tooth surface are respectively arranged at an angle with the second direction;

[0017] An included angle θ1 between the first meshing tooth surface and the second direction is less than or equal to an included angle θ2 between the second meshing tooth surface and the second direction.

[0018] In one embodiment, at least one of the first support member and the second support member is configured with a guide portion, and the direction of the guide portion is the same as the direction of the surface of the matching surface; the first support plate and the second support plate are configured with a matching portion that matches the guide portion;

[0019] When the first supporting member and the second supporting member are relatively close to or away from each other along the second direction, the guiding portion slides relative to the matching portion.

[0020] In one embodiment, the guide portion and the mating surface are spaced apart along a second direction, one of the guide portion and the mating portion includes a guide tooth, and the other of the guide portion and the mating portion includes a tooth groove, the guide tooth can be at least partially accommodated in the tooth groove and can slide along the extension direction of the tooth groove.

[0021] In one embodiment, one of the guiding portion and the matching portion includes a guide column, and the other of the guiding portion and the matching portion includes a guide groove, and the guide column can be at least partially accommodated in the guide groove and can slide along the extension direction of the guide groove.

[0022] In one embodiment, one of the first support plate and the second support plate is configured with a limiting protrusion, and the other is configured with a limiting groove;

[0023] When the first support plate and the second support plate move closer to or farther from each other along the first direction, the limiting protrusion slides relative to the limiting groove.

[0024] In one embodiment, one of the first support member and the second support member is configured with a threaded hole along the second direction, and the other is configured with a through hole along the second direction;

[0025] The adjusting member includes a threaded section, the threaded section passes through the through hole and is threadedly connected to the threaded hole; the adjusting member also includes a clamping section, the clamping section is configured with an annular groove;

[0026] The spinal fusion device further comprises a clamping member, one end of which is connected to the first supporting member or the second supporting member having the through hole, and the other end of which is movably clamped in the annular groove.

[0027] In one embodiment, the surfaces of the first support plate and the second support plate facing away from each other are parallel to each other or arranged at a preset angle;

[0028] The first ends of the first support plate and the second support plate are configured with arc surfaces;

[0029] The first end and the second end of the first support plate and the second support plate are configured with a receiving cavity for accommodating a portion of the support assembly.

[0030] When the above-mentioned spinal fusion device is implanted in the patient's spine, the user can adjust the first support member and the second support member to move closer to or farther from each other along the second direction through the adjusting member, so that the first support plate and the second support plate move closer to or farther from each other along the first direction, and then the height of the entire spinal fusion device changes to meet the different spinal treatment needs, so that the spinal fusion device is better adapted to the spine, and the treatment effect for the patient is also better. At the same time, since the spinal fusion device is constructed with mating surfaces on the first support plate, the second support plate, the first support member and the second support member, the first support plate and the second support plate are moved closer to or farther from each other through the mutual cooperation of the mating surfaces, so the structure of the entire spinal fusion device is relatively simple, the cost is low, and the economy is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 An exploded schematic diagram of a spinal fusion cage provided in one embodiment of the present application.

[0032] Figure 2 for Figure 1 A schematic diagram of a spinal fusion cage in a first state is shown.

[0033] Figure 3 for Figure 1 A first schematic diagram of a spinal fusion cage is shown in a second state.

[0034] Figure 4 for Figure 3 A second schematic diagram of the spinal fusion cage is shown in a second state.

[0035] Figure 5 for Figure 1 A schematic diagram of the spinal fusion cage in a third state is shown.

[0036] Figure 6 for Figure 1 A schematic diagram of the spinal fusion cage is shown in a fourth state.

[0037] Figure 7 for Figure 1 A schematic diagram of the spinal fusion cage is shown in a fifth state.

[0038] Figure 8 for Figure 1 A first schematic diagram showing the connection between a first support member, a second support member and an adjusting member of a spinal fusion cage is shown.

[0039] Fig. 9 for Figure 8 A second schematic diagram showing the connection between the first support member, the second support member and the adjustment member of the spinal fusion cage is shown.

[0040] Fig.10 for Figure 8A third schematic diagram showing the connection between the first supporting member, the second supporting member and the adjusting member of the spinal fusion cage is shown.

[0041] Fig.11 for Figure 1 A first schematic diagram of a first support plate of a spinal fusion cage is shown.

[0042] Fig.12 for Figure 1 A second schematic diagram of a first support plate of a spinal fusion cage is shown.

[0043] Fig.13 for Figure 1 A third schematic diagram of a first support plate of a spinal fusion cage is shown.

[0044] Fig.14 for Figure 1 A schematic diagram of a second support plate of a spinal fusion cage is shown.

[0045] Fig.15 This is a schematic diagram of a spinal fusion cage provided in the second embodiment of the present application.

[0046] Fig.16 for Fig.15 The diagram shows the connection between the first support member, the second support member and the adjusting member of the spinal fusion cage.

[0047] Fig.17 for Fig.15 A schematic diagram of a second support plate of a spinal fusion cage is shown.

[0048] Reference numerals: 110-first support plate; 111-first accommodating cavity; 112-second accommodating cavity; 113-first meshing tooth; 1131-first tooth surface; 1132-second tooth surface; 120-second support plate; 121-third accommodating cavity; 122-fourth accommodating cavity; 123-second meshing tooth; 1231-third tooth surface; 1232-fourth tooth surface; 131-first section; 132-second section; 133-fifth surface; 140-matching portion; 141-tooth groove; 142-guide column; 151-limiting protrusion; 152-limiting groove; 200-support assembly; 210-first support member; 211-first surface; 212-second surface; 213-third meshing tooth; 2131-fifth tooth surface; 2132-sixth tooth surface; 220-second support member; 221-third surface; 222-fourth surface; 223-fourth meshing tooth; 2231-seventh tooth surface; 2232-eighth tooth surface; 230-guide portion; 231-guide tooth; 232-guide groove; 240-threaded hole; 250-through hole; 300-adjusting member; 310-threaded section; 320-clamping section; 321-annular groove; 330-light rod section; 400-clamping member. DETAILED DESCRIPTION

[0049] 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.

[0050] 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.

[0051] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. 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 clearly and specifically defined.

[0052] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0053] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it 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. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0054] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0055] See also Figure 1-Figure 8 , Figure 1 An exploded schematic diagram of a spinal fusion cage provided in an embodiment of the present application is shown. Figure 2 Shows Figure 1 A schematic diagram of a spinal fusion cage in a first state is shown. Figure 3 Shows Figure 1 A first schematic diagram of a spinal fusion cage is shown in a second state. Figure 4 Shows Figure 3 A second schematic diagram of the spinal fusion cage is shown in a second state. Figure 5 Shows Figure 1 A schematic diagram of the spinal fusion cage in a third state is shown. Figure 6 Shows Figure 1 A schematic diagram of the spinal fusion cage is shown in a fourth state. Figure 7 Shows Figure 1 A schematic diagram of the spinal fusion cage is shown in a fifth state. Figure 8 Shows Figure 1 The first schematic diagram of the connection between the first supporting member 210, the second supporting member 220 and the adjusting member 300 of the spinal fusion cage is shown.

[0056] The spinal fusion device provided in one embodiment of the present application includes a first support plate 110, a second support plate 120, a support assembly 200 and an adjustment member 300. The second support plate 120 is spaced apart from the first support plate 110 along a first direction. Specifically, the first direction is Figure 1-Figure 7The first support plate 110 and the second support plate 120 have a first end and a second end in the second direction, and the second direction is set at an angle to the first direction. Specifically, the second direction is Figure 1-Figure 7 xx' direction in; the support assembly 200 includes a first support member 210 arranged at the first end and a second support member 220 arranged at the second end; the adjusting member 300 is transmission-connected with the first support member 210 and the second support member 220, and the adjusting member 300 can drive the first support member 210 and the second support member 220 to be relatively close to or away from each other along the second direction, so that the first support plate 110 and the second support plate 120 are close to or away from each other along the first direction; wherein the first support plate 110, the second support plate 120, the first support member 210 and the second support member 220 all have mating surfaces, and the mating surface of the first support plate 110 and the mating surface of the second support plate 120 are opposite and arranged at an angle; the mating surface of the first support plate 110 is used to cooperate with the mating surface of the first support member 210 and the mating surface of the second support member 220; the mating surface of the second support plate 120 is used to cooperate with the mating surface of the first support member 210 and the mating surface of the second support member 220.

[0057] When the spinal fusion device provided by this embodiment is implanted into the spine of a patient, the user can adjust the first support member 210 and the second support member 220 to move closer to or farther from each other along the second direction through the adjusting member 300, so that the first support plate 110 and the second support plate 120 move closer to or farther from each other along the first direction, thereby changing the height of the entire spinal fusion device to meet the treatment needs of different spines, thereby making the spinal fusion device more adaptable to the spine, and thus achieving better treatment effects for patients. At the same time, since the spinal fusion device is constructed with mating surfaces on the first support plate 110, the second support plate 120, the first support member 210 and the second support member 220, the first support plate 110 and the second support plate 120 are moved closer to or farther from each other through the mutual cooperation of the mating surfaces, so that the structure of the entire spinal fusion device is relatively simple, the cost is low, and the economy is good.

[0058] The structure of the spinal fusion cage is described in detail below.

[0059] See also Fig. 9 The first support member 210 of the spinal fusion device provided in one embodiment of the present application is configured with a first surface 211 and a second surface 212 arranged at an angle to the second direction; the first surface 211 cooperates with the matching surface of the first support plate 110, and the second surface 212 cooperates with the matching surface of the second support plate 120; please refer to Fig. 9, the second support member 220 is constructed with a third surface 221 and a fourth surface 222 set at an angle to the second direction; the third surface 221 cooperates with the matching surface of the first support plate 110, and the fourth surface 222 cooperates with the matching surface of the second support plate 120; when the first support member 210 and the second support member 220 move along the second direction, the matching surface of the first support plate 110 and the matching surface of the second support plate 120 slide relative to each other. When the adjustment member 300 is adjusted to make the first support member 210 and the second support member 220 approach or move away from each other along the second direction, at this time, the matching surface of the first support plate 110 cooperates with the first surface 211 and the third surface 221, and the matching surface of the second support plate 120 cooperates with the second surface 212 and the fourth surface 222, so that the matching surface of the first support plate 110 and the matching surface of the second support plate 120 can slide relative to each other, thereby making the first support plate 110 and the second support plate 120 approach or move away from each other along the first direction. The cooperation of different matching surfaces in the entire adjustment process makes the sliding more stable and smooth.

[0060] See also Fig.11 , Fig.12 and Fig.14 The first support plate 110 and the second support plate 120 of the spinal fusion device provided in one embodiment of the present application have a first section 131 and a second section 132 on the mating surface. The dimension of the first section 131 along the third direction is smaller than the dimension of the second section 132 along the third direction. The second section 132 along the third direction is connected to the first section 131. The third direction is set at an angle to the first direction and the second direction. Specifically, the third direction is Figure 1 and Fig.11 By setting the first section 131 and the second section 132, the surface area of ​​the first support plate 110 and the second support plate 120 that are separated from each other is larger, thereby increasing the contact area between the entire spinal fusion device and the spine, so that when the spinal fusion device is implanted in the patient's spine, the contact with the spine is more stable. At the same time, by setting the length dimension of the first section 131 and the second section 132 along the third direction, the first support plate 110 and the second support plate 120 form a Fig.11 The structure of the spinal fusion cage is narrow at the top and wide at the bottom in the nn' direction, which makes the structure of the entire spinal fusion cage more compact and more stable.

[0061] See also Fig.11 , Fig.12 and Fig.14 The first support plate 110 and the second support plate 120 of the spinal fusion device provided in one embodiment of the present application are also constructed with a fifth surface 133, and the fifth surface 133 is arranged adjacent to the first section 131 along the third direction, one end of the fifth surface 133 is set away from the support assembly 200, and the other end of the fifth surface 133 is connected to the remaining part of the second section 132.

[0062] When the spinal fusion cage is Figure 2 In the preset state of the minimum size shown in FIG. 1 , the fifth surface 133 of the first support plate 110 can cooperate with the matching surface of the second support plate 120 arranged opposite to it along the first direction, and the fifth surface 133 of the second support plate 120 can cooperate with the matching surface of the first support plate 110 arranged opposite to it along the first direction. Figure 2 When the fifth surface 133 is in the preset state of the minimum size shown in FIG. 1 , the fifth surface 133 is located at a position that can avoid the matching surface of part of the first support plate 110 and the matching surface of part of the second support plate 120, so that the entire spinal fusion cage is in the Figure 2 In the preset state of the minimum size shown in FIG. 1 , the size is smaller. Moreover, since the mating surface of the first support plate 110 and the mating surface of the second support plate 120 are along Figure 1 The yy' directions in the figure are staggered with each other. It is precisely because of the existence of the fifth surface 133 that the matching surfaces of the two support plates will not interfere with each other when the spinal fusion cage is combined.

[0063] In the present application, the fifth surface 133 is provided on the first support plate 110 and the second support plate 120, so that when the spinal fusion cage is in the state of the smallest size, the entire spinal fusion cage is Figure 1-Figure 7 The height dimension in the zz direction is small, so when the spinal fusion device is implanted into the patient's body, there is no need to use other tools to open the spine before inserting it, which causes less damage to the patient's bones, makes the operation less difficult, and allows for faster recovery.

[0064] In one embodiment, the mating surfaces of the first support plate 110, the second support plate 120, the first support member 210, and the second support member 220 of the column fusion device are all inclined surfaces, and the inclination angle of the inclined surface along the second direction is 30°-60°. Optionally, the inclination angle of the inclined surface along the second direction is 30°, 45°, or 60°, etc.

[0065] See also Fig. 9 , Fig.11 , Fig.12 , Fig.14 , Fig.16 and Fig.17 The first support plate 110, the second support plate 120, the first support member 210 and the second support member 220 of the spinal fusion device provided in one embodiment of the present application are all provided with meshing teeth on their mating surfaces. By providing the meshing teeth, the first support plate 110, the second support plate 120, the first support member 210 and the second support member 220 can be more accurately matched and transmitted with each other, and the position keeping accuracy between each other is also high.

[0066] Specifically, the meshing teeth include a first meshing tooth surface and a second meshing tooth surface, and the first meshing tooth surface and the second meshing tooth surface are respectively set at an angle with the second direction; the angle θ1 between the first meshing tooth surface and the second direction is less than or equal to the angle θ2 between the second meshing tooth surface and the second direction.

[0067] In one specific embodiment, the angle θ1 between the first meshing tooth 113 and the second direction is in the range of 5-30°. By setting the angle θ1 to be greater than or equal to 5° and less than or equal to 30°, when the first surface 211 and the third surface 221 abut against the mating surface of the first support plate 110, or the second surface 212 and the fourth surface 222 abut against the mating surface of the second support plate 120, the first support plate 110 can apply pressure to the first surface 211 and the third surface 221, thereby reducing the possibility of the first support member 210 and the second support member 220 sliding relative to the first support plate 110 and the second support plate 120 through the component of gravity and the component of pressure on the first support member 210 and the second support member 220. Specifically, the angle θ1 is 5°, 10°, 15°, 20°, 25° or 30°, etc.

[0068] In one specific embodiment, the angle θ2 between the second meshing tooth surface and the second direction is in the range of 30-50°. Specifically, the angle θ2 can be 30°, 35°, 40°, 45° or 50°, etc. The angle θ2 is selected so that sufficient driving force is provided between the mating surfaces of the support assembly 200 and the first support plate 110 and the second support plate 120 during driving.

[0069] In one embodiment, the first meshing tooth surface is along Fig.11 The length dimension in the nn' direction is greater than the length dimension in the second meshing tooth surface along Fig.11 The length dimension in the nn' direction.

[0070] See also Fig.11 The first supporting plate 110 of the spinal fusion device provided in one embodiment of the present application is provided with a first meshing tooth 113 on its mating surface. The first meshing tooth 113 includes a plurality of first tooth units. Each first tooth unit includes a first tooth surface 1131 and a second tooth surface 1132 connected to each other. The angle between the first tooth surface 1131 and the second direction is smaller than the angle between the second tooth surface 1132 and the second direction. It should be noted that the value range of the first tooth surface 1131 is the value range of the first meshing tooth surface, and the value range of the second tooth surface 1132 is the value range of the second meshing tooth surface.

[0071] See also Fig.14The second supporting plate 120 of the spinal fusion device provided in one embodiment of the present application is provided with a second meshing tooth 123 on its mating surface, and the second meshing tooth 123 includes a plurality of second tooth units, each of which includes a third tooth surface 1231 and a fourth tooth surface 1232 connected to each other, and the angle between the third tooth surface 1231 and the second direction is smaller than the angle between the fourth tooth surface 1232 and the second direction. It should be noted that the value range of the third tooth surface 1231 is the value range of the first meshing tooth surface, and the value range of the fourth tooth surface 1232 is the value range of the second meshing tooth surface.

[0072] See also Fig. 9 The first support member 210 of the spinal fusion device provided in one embodiment of the present application is provided with a third meshing tooth 213 on its mating surface. The third meshing tooth 213 includes a plurality of third tooth units. Each third tooth unit includes a fifth tooth surface 2131 and a sixth tooth surface 2132 connected to each other. The angle between the fifth tooth surface 2131 and the second direction is smaller than the angle between the sixth tooth surface 2132 and the second direction. It should be noted that the value range of the fifth tooth surface 2131 is the value range of the first meshing tooth surface, and the value range of the sixth tooth surface 2132 is the value range of the second meshing tooth surface.

[0073] See also Fig. 9 The mating surface of the second support member 220 of the spinal fusion device provided in one embodiment of the present application is configured with a fourth meshing tooth 223, the fourth meshing tooth 223 includes a plurality of fourth tooth units, each of which includes a seventh tooth surface 2231 and an eighth tooth surface 2232 connected to each other, and the angle between the seventh tooth surface 2231 and the second direction is smaller than the angle between the eighth tooth surface 2232 and the second direction. It should be noted that the value range of the seventh tooth surface 2231 is the value range of the first meshing tooth surface, and the value range of the eighth tooth surface 2232 is the value range of the second meshing tooth surface.

[0074] Through the meshing transmission of the first meshing teeth 113 and the second meshing teeth 123 with the third meshing teeth 213 respectively, and the meshing transmission of the first meshing teeth 113 and the second meshing teeth 123 with the fourth meshing teeth 223 respectively, when the adjusting member 300 adjusts the first support member 210 and the second support member 220 to move along the second direction, when adjusted to any stable position, the tooth surfaces of the meshing teeth can be locked to each other, so that the first support member 210 and the second support member 220 are not easy to slide relative to the first support plate 110 or the second support plate 120, thereby making the load-bearing of the spinal fusion device more stable.

[0075] It should be noted that since the two force-applying parts, the first support member 210 and the second support member 220, and the two stretched parts, the first support plate 110 and the second support plate 120, are matched with step-shaped surfaces, and different from the ordinary step shape, the surface of this step close to the horizontal is not horizontal, but has an angle of θ1 and θ2 with the second direction. At this time, when the upper and lower stretched parts apply pressure to the middle respectively, they will be hooked by this step structure to form a lock, similar to a toothed lock, and the entire spinal fusion device will be more stable.

[0076] It should be noted that, in the present application, the meshing cooperation of the first meshing teeth 113, the second meshing teeth 123, the third meshing teeth 213 and the fourth meshing teeth 223 enables the spinal fusion device to have a stepped height adjustment method. Each time the first support member 210 and the second support member 220 which are relatively arranged along the second direction move one tooth number along the first direction, the positions of the first support member 210 and the second support member 220 can be separated by 1 mm.

[0077] It should be noted that by setting the number of teeth of the first meshing teeth 113, the second meshing teeth 123, the third meshing teeth 213 and the fourth meshing teeth 223 along the first direction, the maximum size of the entire spinal fusion cage expanded in the first direction can be controlled. In one specific embodiment, the spinal fusion cage has a larger expansion height and a larger expansion angle along the first direction.

[0078] It should be noted that the spinal fusion device provided in one embodiment of the present application is Figure 1-Figure 7 When adjusting the height in the zz' direction, the minimum height can be extended by 5mm.

[0079] See also Fig. 9 , Figure 11-Figure 14 and Figure 16-Figure 17 In one embodiment of the present application, at least one of the first support member 210 and the second support member 220 of the spinal fusion device is configured with a guide portion 230, and the direction of the guide portion 230 is the same as the direction of the surface of the mating surface; the first support plate 110 and the second support plate 120 are configured with a matching portion 140 that matches the guide portion 230; when the first support member 210 and the second support member 220 are relatively close to or away from each other along the second direction, the guide portion 230 slides relative to the matching portion 140. By providing the guide portion 230, when the first support plate 110 and the second support plate 120 are relatively close to or away from each other along the first direction, the movement process is more stable and smooth.

[0080] See also Fig. 9 and Figure 11-Figure 14The guide portion 230 and the mating surface of the spinal fusion device provided in one embodiment of the present application are arranged at intervals along the second direction, one of the guide portion 230 and the mating portion 140 includes a guide tooth 231, and the other of the guide portion 230 and the mating portion 140 includes a tooth groove, and the guide tooth 231 can be at least partially accommodated in the tooth groove and can slide along the extension direction of the tooth groove. The mutual cooperation between the guide tooth 231 and the tooth groove can achieve the guidance of the first support plate 110 and the second support plate 120 when they move relative to each other.

[0081] See also Figure 16-Figure 17 One of the guide portion 230 and the matching portion 140 of the spinal fusion device provided in an embodiment of the present application includes a guide column 142, and the other of the guide portion 230 and the matching portion 140 includes a guide groove 232. The guide column 142 can be at least partially accommodated in the guide groove 232 and can slide along the extension direction of the guide groove 232. Through the cooperation between the guide column 142 and the guide groove 232, the first support plate 110 and the second support plate 120 are guided when they move relative to each other.

[0082] It should be noted that when the guide portion 230 and the mating portion 140 are a guide column 142 and a guide groove 232, the guide groove 232 can be processed onto the surface of the first support member 210 and the second support member 220, and the guide column 142 is interference fit with the mounting holes on the first support plate 110 and the second support plate 120, or the guide column 142 is directly processed onto the first support plate 110 and the second support plate 120, and then the guide column 142 is inserted into the guide groove 232 and can slide relative to the guide groove 232. This processing method can be directly completed by machining, which is low-cost and high-efficiency.

[0083] See also Figure 1-Figure 7 and Figure 11-Figure 15 In one embodiment of the present application, one of the first support plate 110 and the second support plate 120 of the spinal fusion device is configured with a limiting protrusion 151, and the other is configured with a limiting groove 152; when the first support plate 110 and the second support plate 120 approach or move away from each other along the first direction, the limiting protrusion 151 slides relative to the limiting groove 152. Through the cooperation between the limiting protrusion 151 and the limiting groove 152, when the first support plate 110 and the second support plate 120 approach or move away from each other along the first direction, the movement between the two is more stable and smooth, and it is not easy to deflect. In one specific embodiment, the limiting protrusion 151 and the limiting groove 152 extend along the first direction.

[0084] See also Figure 1 and Fig.10In one embodiment of the present application, one of the first support member 210 and the second support member 220 of the spinal fusion device is configured with a threaded hole 240 along the second direction, and the other is configured with a through hole 250 along the second direction; see Figure 1 and Fig.10 The adjusting member 300 includes a threaded section 310, which passes through the through hole 250 and is threadedly connected to the threaded hole 240; the adjusting member 300 also includes a clamping section 320, which is configured with an annular groove 321; see Figure 1 and Fig.10 The spinal fusion device further comprises a clamping member 400, one end of which is connected to the first support member 210 or the second support member 220 having the through hole 250, and the other end of which is movably clamped in the annular groove 321. By providing the clamping member 400 and making the clamping member 400 movably clamped in the annular groove 321, when the adjusting member 300 rotates around its own rotation axis, the clamping member 400 can limit the movement of the adjusting member 300 along the second direction, thereby making the adjusting member 300 only rotate around its own axis, but not move along its own axis direction, that is, the second direction. In this process, the threaded section 310 of the adjusting member 300 can make the first support member 210 or the second support member 220 having the threaded hole 240 move along the second direction, that is, the rotation is converted into translation, thereby making the first support member 210 and the second support member 220 approach or move away from each other along the second direction.

[0085] It should be noted that in the present application, the angle θ1 between the first tooth surface 1131, the third tooth surface 1231, the fifth tooth surface 2131 and the seventh tooth surface 2231 and the second direction is in the range of 5-30°. Therefore, when the spinal fusion device is adjusted into place, it can rely on the toothed barb structure formed by the existence of θ1 to bear force, thereby maintaining the locking of the adjustment member 300 and the support member, rather than the threaded segment 310 on the adjustment member 300 being subjected to force, so that the load-bearing capacity of the entire spinal fusion device is more stable, and the thread damage or thread rotation of the threaded segment 310 can be effectively reduced, thereby causing the spinal fusion device to move along the spinal fusion device. Figure 1-Figure 7 The height in the zz' direction is reduced, which in turn affects the patient.

[0086] It should be noted that the pitch of the threaded section 310 on the adjusting member 300 and the length of each step formed by the meshing teeth constructed on the mating surface are in an integer ratio relationship. In this way, it can be effectively guaranteed that when the adjusting member 300 rotates an integer number of circles around its own rotation axis, the meshing teeth on the mating surface will move one tooth unit along the first direction, thereby causing the entire spinal fusion device to rise or fall one level along the first direction. When the meshing teeth on the mating surfaces of the first support member 210, the second support member 220, the first support plate 110 and the second support plate 120 are completely fitted, it is a locked state of each level, and the height can only be changed by rotating the adjusting member 300. In this way, after the spinal fusion device is implanted in the human body, it is in a relatively stable locked state, which can ensure the high stability of the spinal fusion device and have a better treatment effect.

[0087] In one specific embodiment, the first support member 210 is configured with a threaded hole 240, and the second support member 220 is configured with a through hole 250. In another specific embodiment, the first support member 210 is configured with a through hole 250, and the second support member 220 is configured with a threaded hole 240.

[0088] See also Figure 1 and Fig.10 The adjusting member 300 provided in one embodiment of the present application also includes a smooth rod segment 330, which is connected between the threaded segment 310 and the clamping segment 320. The smooth rod segment 330 is used to pass through the through hole 250 and fit with the through hole 250 in a clearance, so that the adjusting member 300 can be rotated around its own rotation axis more conveniently.

[0089] In one specific embodiment, the through hole 250 is a stepped hole, and the diameter of the engaging section 320 is larger than the diameter of the bare rod section 330 , so that the adjusting member 300 is not easily separated from the second supporting member 220 when being engaged to the second supporting member 220 .

[0090] See also Figure 2-Figure 7 The first support plate 110 and the second support plate 120 of the spinal fusion device provided in one embodiment of the present application have surfaces that are opposite to each other and are parallel or arranged at a preset angle. By such an arrangement, the spinal fusion device can fit with different spinal surfaces and has higher adaptability. Figure 2-Figure 7 and Figure 12-14The first ends of the first support plate 110 and the second support plate 120 are configured with an arc surface, and by providing the arc surface, the spinal fusion device can be more convenient to implant in the spine. The first and second ends of the first support plate 110 and the second support plate 120 are configured with a receiving cavity for accommodating part of the support assembly 200. By configuring the receiving cavity for accommodating part of the support assembly 200 on the first support plate 110 and the second support plate 120, that is, providing an escape space for accommodating the support assembly 200 and the adjustment member 300 on the first support plate 110 and the second support plate 120, the structure of the entire spinal fusion device can be more compact.

[0091] Specifically, the first end of the first support plate 110 is configured with a first accommodating cavity 111, and the second end of the first support plate 110 is configured with a second accommodating cavity 112. The first end of the second support plate 120 is configured with a third accommodating cavity 121, and the second end of the second support plate 120 is configured with a fourth accommodating cavity 122. The first accommodating cavity 111 is used to accommodate the first support member 210 along the Figure 2-Figure 7 The third accommodating cavity 121 is used to accommodate the lower part of the first support member 210. The second accommodating cavity 112 is used to accommodate the second support member 220 along the Figure 2-Figure 7 The fourth accommodating cavity 122 is used to accommodate the lower part of the second supporting member 220 in the upper part of the zz' direction.

[0092] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, 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, they should be considered to be within the scope of this specification.

[0093] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A spinal fusion cage, characterized in that: The spinal fusion cage comprises: A first support plate (110); a second support plate (120), the second support plate (120) and the first support plate (110) being arranged at intervals along a first direction, the first direction being the z-axis direction; and the first support plate (110) and the second support plate (120) having a first end and a second end in a second direction, the second direction being arranged at an angle to the first direction; and the second direction being the x-axis direction; A support assembly (200), the support assembly (200) comprising a first support member (210) arranged at the first end and a second support member (220) arranged at the second end; an adjusting member (300), the adjusting member (300) being in transmission connection with the first supporting member (210) and the second supporting member (220), the adjusting member (300) being capable of driving the first supporting member (210) and the second supporting member (220) to move relatively closer to or farther away from each other along the second direction, so that the first supporting plate (110) and the second supporting plate (120) move relatively closer to or farther away from each other along the first direction; Wherein, the first support plate (110), the second support plate (120), the first support member (210) and the second support member (220) all have matching surfaces, and the matching surface of the first support plate (110) and the matching surface of the second support plate (120) are opposite to each other and are arranged at an angle; the matching surface of the first support plate (110) is used to match with the matching surface of the first support member (210) and the matching surface of the second support member (220); the matching surface of the second support plate (120) is used to match with the matching surface of the first support member (210) and the matching surface of the second support member (220); The mating surfaces of the first support plate (110), the second support plate (120), the first support member (210) and the second support member (220) are all configured with meshing teeth; the meshing teeth include a first meshing tooth surface and a second meshing tooth surface, the first meshing tooth surface and the second meshing tooth surface are respectively arranged at an angle with the second direction; the angle θ1 between the first meshing tooth surface and the second direction is less than or equal to the angle θ2 between the second meshing tooth surface and the second direction; the value range of the angle θ1 between the first meshing tooth surface and the second direction is 5°-30°; When the adjusting member (300) rotates an integer number of times around its own rotation axis, the meshing teeth on the matching surface move one tooth unit along the first direction, so that the spinal fusion device is raised or lowered by one level along the first direction.

2. The spinal fusion cage according to claim 1, characterized in that: The first support member (210) is constructed with a first surface (211) and a second surface (212) which are arranged at an angle to the second direction; the first surface (211) cooperates with a matching surface of the first support plate (110), and the second surface (212) cooperates with a matching surface of the second support plate (120); The second support member (220) is constructed with a third surface (221) and a fourth surface (222) which are arranged at an angle to the second direction; the third surface (221) cooperates with a matching surface of the first support plate (110), and the fourth surface (222) cooperates with a matching surface of the second support plate (120); When the first support member (210) and the second support member (220) move along the second direction, the matching surface of the first support plate (110) and the matching surface of the second support plate (120) slide relative to each other.

3. The spinal fusion cage according to claim 1, characterized in that: Partial mating surfaces of the first support plate (110) and the second support plate (120) comprise a first section (131) and a second section (132), the dimension of the first section (131) along a third direction is smaller than the dimension of the second section (132) along the third direction, and the second section (132) is partially connected to the first section (131) along the third direction, and the third direction is the y-axis direction; The first support plate (110) and the second support plate (120) are further configured with a fifth surface (133), the fifth surface (133) being arranged adjacent to the first section (131) along the third direction, one end of the fifth surface (133) being arranged away from the support assembly (200), and the other end of the fifth surface (133) being connected to a remaining portion of the second section (132).

4. The spinal fusion cage according to any one of claims 1 to 3, characterized in that: At least one of the first support member (210) and the second support member (220) is configured with a guide portion (230), the direction of the guide portion (230) being the same as the direction of the surface of the matching surface; the first support plate (110) and the second support plate (120) are configured with a matching portion (140) that matches the guide portion (230); When the first support member (210) and the second support member (220) move relatively closer to or farther away from each other along the second direction, the guide portion (230) slides relative to the matching portion (140).

5. The spinal fusion cage according to claim 4, characterized in that: The guide portion (230) and the matching surface are arranged at intervals along the second direction, one of the guide portion (230) and the matching portion (140) comprises a guide tooth (231), and the other of the guide portion (230) and the matching portion (140) comprises a tooth groove (141), and the guide tooth (231) can be at least partially accommodated in the tooth groove (141) and can slide along the extension direction of the tooth groove (141).

6. The spinal fusion cage according to claim 4, characterized in that: One of the guide portion (230) and the matching portion (140) comprises a guide column (142), and the other of the guide portion (230) and the matching portion (140) comprises a guide groove (232), wherein the guide column (142) can be at least partially accommodated in the guide groove (232) and can slide along the extension direction of the guide groove (232).

7. The spinal fusion cage according to any one of claims 1 to 3 and claims 5 to 6, characterized in that: One of the first support plate (110) and the second support plate (120) is configured with a limiting protrusion (151), and the other is configured with a limiting groove (152); When the first support plate (110) and the second support plate (120) move closer to or farther from each other along the first direction, the limiting protrusion (151) slides relative to the limiting groove (152).

8. The spinal fusion cage according to any one of claims 1 to 3 and claims 5 to 6, characterized in that: One of the first support member (210) and the second support member (220) is configured with a threaded hole (240) along the second direction, and the other is configured with a through hole (250) along the second direction; The adjusting member (300) comprises a threaded section (310), wherein the threaded section (310) passes through the through hole (250) and is threadedly connected to the threaded hole (240); the adjusting member (300) further comprises a clamping section (320), wherein the clamping section (320) is configured with an annular groove (321); The spinal fusion device further comprises a clamping member (400), one end of which is connected to the first support member (210) or the second support member (220) having the through hole (250), and the other end of which is movably clamped in the annular groove (321).

9. The spinal fusion cage according to any one of claims 1 to 3 and claims 5 to 6, characterized in that: Surfaces of the first support plate (110) and the second support plate (120) that are opposite to each other are parallel to each other or are arranged at a preset angle; The first ends of the first support plate (110) and the second support plate (120) are configured with arc surfaces; The first end and the second end of the first support plate (110) and the second support plate (120) are configured with a receiving cavity for accommodating a portion of the support assembly (200).

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