Adjustable vertebral plate fixing plate system

Abstract

The invention relates to an adjustable vertebral plate fixing plate system, which comprises a vertebral plate assembly, a vertebral plate fixing plate and a vertebral plate fixing plate, the vertebral plate assembly is configured to at least adjust the distance between the first end part and the second end part; the first supporting assembly is rotationally connected with the first end part; and the second supporting assembly is rotationally connected with the second end part.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, and in particular to an adjustable lamina fixation plate system. BACKGROUND

[0002] The lamina is located at the posterior of the vertebral arch, in a plate-like structure, which connects the bilateral pedicles of the vertebral arch, and together encloses the vertebral foramen. From the side, the lamina extends backward, and the laminae of multiple vertebrae are connected to each other, forming the posterior wall of the spinal canal, which protects important nerve structures such as the spinal cord.

[0003] In spinal surgery, the middle of the lamina is "opened", that is, part of the lamina is removed to enlarge the diameter of the spinal canal and relieve nerve compression. After the lamina is cut, the lamina is reconstructed by the lamina fixation plate system.

[0004] The existing lamina fixation plate system has the following defects: multiple sizes of lamina fixation plate systems need to be prepared before the operation, and the appropriate size is selected according to the opening length during the operation; the size and shape of the lamina fixation plate system cannot be adjusted, and the lamina needs to be corrected according to the shape of the product; there is a possibility of re-closing after the operation, and the treatment effect of decompression cannot be achieved. SUMMARY

[0005] In view of the above analysis, the embodiments of the present application aim to provide an adjustable lamina fixation plate system to at least solve one of the above problems.

[0006] The present application provides an adjustable lamina fixation plate system, comprising:

[0007] a lamina assembly provided with a first end portion and a second end portion; the lamina assembly is configured to be able to adjust at least the distance between the first end portion and the second end portion;

[0008] a first support assembly rotatably connected with the first end portion;

[0009] a second support assembly rotatably connected with the second end portion.

[0010] Further, the lamina assembly comprises a first lamina element and a second lamina element;

[0011] the first lamina element is provided with a first displacement portion and the first end portion;

[0012] the second lamina element is provided with a second displacement portion and the second end portion;

[0013] the first displacement portion and the second displacement portion cooperate to enable linear displacement movement between the first lamina element and the second lamina element, so as to adjust the distance between the first end portion and the second end portion.

[0014] Further, the first lamina element and the second lamina element are connected by a linear displacement movement through a matching toothed engagement.

[0015] Further, at least one side of the first lamina element is provided with a toothed portion;

[0016] The second lamina element is provided with a gear wheel that matches the toothed portion, and the gear wheel is engaged with the toothed portion.

[0017] Further, the second lamina element is further provided with a sliding groove that matches the first lamina element, and a mounting groove that matches the gear wheel;

[0018] The first lamina element can be inserted into the sliding groove, and the gear wheel is mounted in the mounting groove and can rotate in the mounting groove;

[0019] The sliding groove is in communication with the mounting groove, and at least a part of the gear wheel is located in the sliding groove and engaged with the toothed portion.

[0020] Further, the second lamina element is provided with a scale line;

[0021] The upper surface of the gear wheel is provided with an operation groove, which is equipped to at least enable the rotation of the gear wheel through an operation tool that matches the operation groove.

[0022] Further, the second lamina element further includes a locking structure, which is configured to at least prevent the rotation of the gear wheel;

[0023] The locking structure includes:

[0024] A through hole provided on the gear wheel, which is in communication with and below the operation groove;

[0025] A locking hole provided on the gear wheel mounting portion of the second lamina element;

[0026] A locking piece configured to be locked into the locking hole through the through hole, and to fasten the gear wheel on the mounting portion.

[0027] Further, the first support assembly and the first end portion, and the second support assembly and the second end portion are connected by a rotating structure;

[0028] The rotating structure is a one-way rotating structure;

[0029] The rotating structure includes:

[0030] A rotating shaft, at least one end of which is provided with a one-way rotating assembly;

[0031] Rotating shaft channels provided at the first end and the second end for the rotating shaft to pass through;

[0032] The rotating shaft assembly is provided in the first support assembly and the second support assembly. The rotating shaft assembly is provided with assembly holes for assembling both ends of the rotating shaft. The assembly holes cooperate with the one-way rotation assembly so that the rotating shaft can rotate unidirectionally relative to the rotating shaft assembly.

[0033] The rotating shaft is located inside the rotating shaft channel, and both ends extend out of the rotating shaft channel and are located inside the assembly hole;

[0034] The rotating shaft has a boss at one end where the one-way rotation component is located, and the one-way rotation component is mounted on the boss.

[0035] The one-way rotation assembly includes a pawl and an elastic element. One end of the pawl is rotatably connected to the end of the boss or the rotating shaft, and the other end of the pawl is provided with an elastic element between it and the boss.

[0036] The mounting hole is provided with helical teeth that cooperate with the pawl.

[0037] Furthermore, the first support component and the second support component are provided with at least one fixing hole;

[0038] The first support assembly and / or the second support assembly includes a fixed part and a rotating arm. One end of the fixed part is connected to a first end or a second end, and the other end of the fixed part is rotatably connected to the rotating arm. The fixed part is provided with at least one fixing hole, and the rotating arm is provided with at least one fixing hole.

[0039] Furthermore, the adjustable laminar fixation system is configured to be accessible via endoscopic or cannulated approach;

[0040] The adjustable lamina fixation system includes an initial state in which its thickness and width are both smaller than the diameter of the sleeve.

[0041] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects: the length of the lamina assembly is adjustable, and the angle between the first support assembly, the second support assembly and the lamina assembly is adjustable. On the one hand, it is not necessary to prepare lamina fixation plate systems of different sizes before surgery, and the size and shape of the adjustable lamina fixation plate system can be adjusted according to the opening shape. On the other hand, it is not necessary to modify the lamina after opening in order to adapt to the product shape, which simplifies the surgical process and speeds up the surgical process.

[0042] The technical solutions in the present application can be combined with each other to realize more preferred combination solutions. Other features and advantages of the present application will be described in the following description, and some advantages will become apparent from the description, or will be understood by those skilled in the art through implementation of the present application. The purposes and other advantages of the present application can be realized and obtained through the contents particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0043] The accompanying drawings are included to provide a further understanding of the present application, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application.

[0044] Figure 1 Structure diagram of the adjustable lamina fixation plate system in the embodiment (I);

[0045] Figure 2 Structure diagram of the adjustable lamina fixation plate system in the embodiment (II);

[0046] Figure 3 Structure diagram of the adjustable lamina fixation plate system in the embodiment (III);

[0047] Figure 4 Side view of the initial state of the adjustable lamina fixation plate system in the embodiment;

[0048] Figure 5 Top view of the initial state of the adjustable lamina fixation plate system in the embodiment;

[0049] Figure 6 Exploded view of the adjustable lamina fixation plate system in the embodiment;

[0050] Figure 7 Structure diagram of the adjustable lamina fixation plate system with scale lines in the embodiment;

[0051] Figure 8 Partial structure diagram of the adjustable lamina fixation plate system with scale lines in the embodiment;

[0052] Figure 9 Structure diagram of the second displacement part in the embodiment;

[0053] Figure 10 Structure diagram of the first lamina element in the embodiment;

[0054] Figure 11 Partial structure diagram of the second lamina element in the embodiment;

[0055] Figure 12 Sectional view of the lamina assembly in the embodiment;

[0056] Figure 13 Fig. 1 is a schematic diagram of a first support assembly in the embodiment of the present application;

[0057] Figure 14 Fig. 2 is a schematic diagram of a part of the adjustable lamina fixation plate system in the embodiment of the present application;

[0058] Figure 15 Fig. 3 is a sectional view of the adjustable lamina fixation plate system in the embodiment of the present application;

[0059] Figure 16 Fig. 4 is a schematic diagram of the structure of a rotating shaft in the embodiment of the present application;

[0060] Figure 17 Fig. 5 is a schematic diagram of the adjustable lamina fixation plate system fixed at a door opening in the embodiment of the present application;

[0061] Figure 18 Fig. 6 is a schematic diagram of the angle adjustment of a rotating arm of a second support assembly when the adjustable lamina fixation plate system is fixed at a door opening in the embodiment of the present application;

[0062] Figure 19 Fig. 7 is a schematic diagram of the adjustable lamina fixation plate system entering an expansion sleeve in the embodiment of the present application.

[0063] Reference signs:

[0064] 1-lamina assembly; 101-first end; 102-second end; 11-first lamina element; first displacement part 111; 12-second lamina element; 121-second displacement part; 121a-operation slot; 121b-perforation; 122-sliding slot; 123-assembly slot; 123a-locking hole; 13-locking piece; 2-first support assembly; 201-first fixing hole; 21-first rotating shaft assembly part; 211-first assembly hole; 3-second support assembly; 301-second fixing hole; 31-second rotating shaft assembly part; 311-second assembly hole; 32-fixing part; 33-rotating arm; 4-rotating shaft; 41- boss; 42-pawl; 43-elastic piece; 5-fixing piece; 6-expansion sleeve. DETAILED DESCRIPTION

[0065] The preferred embodiments of the present application will be described in detail below with reference to the drawings, which constitute a part of the present application, and are used to explain the principles of the present application, and are not used to limit the scope of the present application.

[0066] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the term "connected" should be understood in a broad sense, for example, it can be fixedly connected, or detachably connected, or integrally connected, which can be mechanically connected, or electrically connected, which can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above-mentioned term in the present application can be understood according to the specific circumstances.

[0067] The terms "top", "bottom", "above", "under" and "on" used throughout the description are relative positions of the components of the device, for example, the relative positions of the top and bottom substrates inside the device. It can be understood that the device is multifunctional, regardless of their orientation in space.

[0068] The general working surface of the present application can be a plane or a curved surface, which can be inclined or horizontal. For the convenience of description, the embodiments of the present application are placed on a horizontal plane and used on the horizontal plane, and "high and low" and "up and down" are defined accordingly.

[0069] One specific embodiment of the present application discloses an adjustable lamina fixation plate system, as shown in Figures 1-19 comprises:

[0070] The lamina assembly 1 is provided with a first end portion 101 and a second end portion 102, and the lamina assembly 1 is configured to be able to adjust at least the distance between the first end portion 101 and the second end portion 102, i.e. the length of the lamina assembly 1 is adjustable, so as to better adapt to different door opening lengths;

[0071] The first support assembly 2 is rotatably connected with the first end portion 101.

[0072] The second support assembly 3 is rotatably connected with the second end portion 102.

[0073] The adjustable lamina fixation plate system of the present application not only has an adjustable length of the lamina assembly, but also has an adjustable angle between the first support assembly, the second support assembly and the lamina assembly. On the one hand, different sizes of lamina fixation plate systems do not need to be prepared before operation, and the size and shape of the adjustable lamina fixation plate system can be adjusted according to the shape of the door opening; on the other hand, the lamina of the patient after the door opening does not need to be modified in order to adapt to the shape of the product, which simplifies the operation process and speeds up the operation process.

[0074] The first end portion 101 and the second end portion 102 are separately arranged at the two ends of the lamina assembly 1, i.e. the lamina assembly is located between the first support assembly 2 and the second support assembly 3, and the first support assembly and the second support assembly are respectively connected with the osteotomies at both ends of the door opening.

[0075] The adjustable lamina fixation system is configured to be accessed through a mirror or a cannula (such as an extended cannula), so that it can be applied to a minimally invasive surgery with a small surgical incision. Figures 4-5 As shown in the structure (some details are not shown), the adjustable lamina fixation system of the present application can be adjusted to an initial state to facilitate its placement in a minimally invasive channel. In the initial state, the extension directions of the first support assembly 2, the second support assembly 3 and the lamina assembly 1 are all parallel to the extension direction A-A, the thickness of the adjustable lamina fixation system is H, and the width of the adjustable lamina fixation system is W, both H and W are less than the diameter of the cannula used for minimally invasive surgery, for example, the diameter of the cannula is 9mm, then H<9mm, W<9mm.

[0076] It should be noted that the width of the adjustable lamina fixation system is constant regardless of any state, and the length (in the extension direction A-A) and the thickness can be adjusted. Specifically, the length can be adjusted by the lamina assembly, and the thickness can be adjusted by adjusting the angle of the first support assembly, the second support assembly and the lamina assembly.

[0077] The lamina assembly 1 includes a first lamina element 11 and a second lamina element 12, the first lamina element 11 is provided with a first displacement part 111 and the first end part 101, the second lamina element 12 is provided with a second displacement part 121 and the second end part 102, the first displacement part 111 cooperates with the second displacement part 121 to enable linear displacement movement between the first lamina element 11 and the second lamina element 12, so as to adjust the distance between the first end part 101 and the second end part 102.

[0078] According to an embodiment of the present application, the first lamina element 11 and the second lamina element 12 realize linear displacement movement through cooperating tooth engagement, that is, the first displacement part 111 and the second displacement part 121 are provided with cooperating tooth patterns, and linear displacement movement between the first lamina element and the second lamina element is realized through tooth engagement.

[0079] In actual application, linear displacement movement between the first lamina element 11 and the second lamina element 12 can also be realized through slide rail structure, clamping convex structure and the like, and is not limited to tooth engagement. The tooth engagement method of the present application can more conveniently, accurately and orderly control the linear movement of the first lamina element 11 and the second lamina element 12, and is more suitable for surgeries that require fine control.

[0080] Specifically, at least one side of the first lamina element 11 is provided with a toothed portion, i.e. the first displacement portion 111, and the extension direction of the toothed portion is consistent with the extension direction A-A (i.e. the extension direction of the toothed portion is consistent with the extension direction of the lamina assembly, the first support assembly, and the second support assembly), and the second lamina element 12 is provided with a gear wheel that cooperates with the toothed portion, i.e. the second displacement portion 121, which is engaged with the toothed portion. When the gear wheel is rotated, it drives the toothed portion to move linearly, and in turn drives the first lamina assembly 11 to move linearly.

[0081] In order to improve the structural strength and adjustment stability of the lamina assembly 1, the second lamina element 12 is further provided with a sliding groove 122 that cooperates with the first lamina element 11 and an assembly groove 123 that cooperates with the gear wheel. The first lamina element 11 can be inserted into the sliding groove 122, the gear wheel is assembled in the assembly groove 123 and can rotate in the assembly groove 123, the sliding groove 122 is in communication with the assembly groove 123, and at least a part of the gear wheel is located in the sliding groove 121 and engaged with the toothed portion, i.e. the side of the toothed portion facing the sliding groove is in communication with the assembly groove, so that the gear wheel in the assembly groove extends into the sliding groove and is engaged with the toothed portion. In this way, on the one hand, the stability of the lamina assembly during length adjustment is improved, and the engagement stability between the gear wheel and the toothed portion is improved. On the other hand, the connection strength of the first lamina element and the second lamina element is improved, and the gear wheel can also be prevented from accidentally falling out of the assembly groove.

[0082] Specifically, one end of the first lamina element 11 is provided with a first end portion 101, and the other end of the first lamina element 11 is located in the sliding groove 122. The first lamina element 11 inserted into the sliding groove 122 can slide in the sliding groove 122. In this embodiment, the main body shape of the first lamina element 11 is a cuboid, and the side of the cuboid close to the assembly groove 123 is provided with a toothed portion, which extends at least from one end of the cuboid close to the sliding groove to the middle of the cuboid, and the other end away from the sliding groove is provided with the first end portion 101. In order to prevent the toothed portion from slipping off the gear wheel, the end of the first lamina element located in the sliding groove is provided with a limiting protrusion (not shown in the figure), which is configured to at least prevent the toothed portion from falling off the gear wheel.

[0083] One end of the second lamina element 12 is provided with a second end portion 102, and the other end of the second lamina element 12 is provided with an inwardly extending sliding groove 122, the extending direction of the sliding groove 122 is consistent with the extending direction A-A. The second lamina element 12 is also provided with a gear assembly portion, the gear assembly portion is provided with an upwardly open assembly groove 123, and the gear is located in the assembly groove 123 and can rotate around the center of the assembly groove 123. In this embodiment, the sliding groove is an open-ended cuboid groove, and the open end of the sliding groove is located at the end of the second lamina element 12 away from the second end portion. The assembly groove is an open-ended cylindrical groove, and the open end of the assembly groove is located in the thickness direction (i.e. perpendicular to the extending direction and the width direction). For the convenience of operation, the open end of the assembly groove is upwardly open (towards the direction of the operator).

[0084] In order to accurately control the length of the lamina assembly 1, the second lamina element 12 is provided with a scale line, and the scale line is consistent with the extending direction A-A. The scale line can be used to mark the length of the second lamina element 12 sliding out of the sliding groove, or can be used to mark the length of the lamina assembly 1, as shown in Figure 7 and Figure 8 The scale line is preferably provided on the upper surface of the second lamina element 12 to facilitate the observation of the operator.

[0085] In order to facilitate the operator to accurately control the rotation angle of the gear, and further accurately control the length of the lamina assembly, the gear is provided with an operation groove 121a, which is equipped to at least enable the gear to be rotated by an operation tool matched with the operation groove. Exemplarily, the shape of the operation groove 121a is hexagonal, and a hexagonal screwdriver can be inserted into the operation groove 121a to rotate the gear. For the convenience of the operator, the operation groove 121a is located in the center of the upper surface of the gear.

[0086] In order to avoid the length of the lamina assembly changing after length adjustment, the second lamina element 12 further comprises a locking structure, which is configured to at least prevent the gear from rotating, thereby fixing the length of the lamina assembly. Exemplarily, the locking structure comprises:

[0087] A through hole 121b is provided on the gear, the through hole 121b is through the operation groove 121a and located below the operation groove 121a, preferably, the aperture of the through hole 121b is smaller than the diameter of the operation groove 121a, that is, the through hole is provided on the groove bottom of the operation groove 121a, and the through hole can be seen through the operation groove;

[0088] A locking hole 123a is arranged on the gear assembly portion of the second lamina element 12, and is located below the assembly groove 123. Preferably, the diameter of the locking hole 123a is smaller than the diameter of the assembly groove 123, that is, the locking hole 123a is arranged on the groove bottom of the assembly groove 123, and the locking hole 123a can be seen through the assembly groove 123.

[0089] A locking member 13 is configured to pass through the through hole 121b and lock into the locking hole 123a, and fasten the gear on the gear assembly portion, so that the gear can no longer be rotated. That is, the gear is fixed in the assembly groove by the locking member passing through the through hole and extending into the locking hole. The locking member 13 cooperates with the locking hole 123a. Exemplarily, the locking hole 123a is a threaded hole, and the locking member 13 is one of a screw, a bolt, and the like. That is, the locking hole and the locking member are locked by thread cooperation.

[0090] It should be noted that when the gear is assembled in the assembly groove, the through hole and the locking hole are through, and the diameter of the through hole is not less than the diameter of the locking hole. The connection mode of the locking member 13 and the locking hole is detachable connection, so as to facilitate the adjustment of the length of the lamina assembly again.

[0091] The first support assembly 2 and the first end portion 101, and the second support assembly 3 and the second end portion 102 are rotationally connected through a rotation structure. To avoid postoperative door closing again, the rotation structure is a one-way rotation structure, so that the first support assembly 2 relative to the first end portion 101 and the second support assembly 3 relative to the second end portion 102 can only rotate in one direction, and the rotation direction is opposite to the door closing direction (that is, the first support assembly 2 and the second support assembly 3 can only rotate upward, that is, the first support assembly and the second support assembly can only rotate towards the direction of the operator, as shown in Figure 13 Thus, it can be avoided that the door is closed again after the operation, so that the adjustable lamina fixation plate system can long-term realize the treatment effect of decompression.

[0092] The rotation structure comprises:

[0093] A rotation shaft 4, at least one end of which is provided with a one-way rotation assembly;

[0094] A rotation shaft passage is arranged on the first end portion 101 and the second end portion 102 for the rotation shaft 4 to pass through. Specifically, the first end portion 101 is provided with a first rotation shaft passage 101a, and the second end portion 102 is provided with a second rotation shaft passage 102a;

[0095] A rotation shaft assembly portion is arranged on the first support assembly 2 and the second support assembly 3, and the rotation shaft assembly portion is provided with an assembly hole for assembling both ends of the rotation shaft. The assembly hole cooperates with the one-way rotation assembly, so that the rotation shaft can rotate in one direction relative to the rotation shaft assembly portion.

[0096] The rotating shaft 4 is located in the rotating shaft channel and the two ends thereof pass through the rotating shaft channel and are located in the assembly holes.

[0097] Specifically, the first support assembly 2 is provided with a first rotating shaft assembly part 21, the first rotating shaft assembly part 21 is provided with two oppositely arranged first assembly holes 211, and the first rotating shaft assembly part 21 is provided with a first rotating groove between the two first assembly holes 211 for inserting the first end part 101. After the first end part is inserted into the first rotating groove, the first assembly hole 211 is in communication with the first rotating shaft channel 101a, so as to be ready for the rotating shaft to be assembled between the first support assembly and the first end part to realize the one-way rotating connection therebetween, that is, the first support assembly and the first end part are connected through the one-way rotating connection of the rotating shaft, the rotating shaft is located in the first rotating shaft channel and the two ends thereof pass through the first rotating shaft channel and are located in the first assembly holes. The second support assembly 3 is provided with a second rotating shaft assembly part 31, the second rotating shaft assembly part 31 is provided with two oppositely arranged second assembly holes 311, and the second rotating shaft assembly part 31 is provided with a second rotating groove between the two second assembly holes 311 for inserting the second end part 102. After the second end part is inserted into the second rotating groove, the second assembly hole 311 is in communication with the second rotating shaft channel 102a, so as to be ready for the rotating shaft to be assembled between the second support assembly and the second end part to realize the one-way rotating connection therebetween, that is, the second support assembly and the second end part are connected through the one-way rotating connection of the rotating shaft, the rotating shaft is located in the second rotating shaft channel and the two ends thereof pass through the second rotating shaft channel and are located in the second assembly holes.

[0098] According to an embodiment of the present application, the one-way rotating connection structure between the one-way rotating assembly and the assembly hole is similar to a ratchet structure. Specifically, the rotating shaft 4 is provided with a boss 41 at one end of the one-way rotating assembly, and the one-way rotating assembly is arranged above the boss 41. The one-way rotating assembly comprises a pawl 42 and an elastic member 43. One end of the pawl 42 is in rotating connection with the end of the rotating shaft or the boss 41, and the other end of the pawl 42 is provided with the elastic member 43 between the pawl 42 and the boss 41. The pawl 42 has the shape of a curved bar. The assembly hole (including the first assembly hole and the second assembly hole) is provided with a spiral thread which cooperates with the pawl 42, that is, the spiral thread of the assembly hole is consistent with the bending direction of the pawl 42. In this way, when the first support assembly and the second support assembly are rotated, the pawl and the spiral thread of the assembly hole are in one-way step engagement. The arrangement of the elastic member 43 ensures that the pawl and the spiral thread are always in engagement, thereby ensuring the one-way rotating connection between the one-way rotating assembly and the rotating shaft assembly part. On the other hand, if it is necessary to adjust the angle of the first support assembly and the second support assembly in the reverse direction (the direction opposite to the one-way rotating direction), the pawl can be disengaged from the spiral thread by exerting force on the pawl to compress the elastic member, so as to rotate the first support assembly and the second support assembly in the reverse direction.

[0099] In the embodiment, the end of the rotating shaft is cut along the center line to form a boss 41, the boss 41 is in the shape of a semi-cylinder, the upper surface of the boss is a plane, and the side surface of the boss is a cylindrical curved surface. The elastic member 43 is a spring, the upper end of the spring is connected with the pawl 42, and the lower end of the spring is connected with the upper surface of the boss 41.

[0100] The rotating shaft can be provided with a one-way rotating assembly at both ends or only one end. When the rotating shaft is provided with a one-way rotating assembly at both ends, the one-way rotating connection of the first support assembly, the second support assembly and the lamina assembly is more stable. When the rotating shaft is provided with a one-way rotating assembly at only one end, the one-way rotating of the first support assembly, the second support assembly and the lamina assembly is more convenient, and it is also more convenient to adjust the angle in the reverse direction. In actual application, the number of one-way rotating assemblies can be selected according to the application situation.

[0101] It should be noted that, since the first support assembly and the second support assembly are arranged at both ends of the lamina assembly, and the one-way rotating directions of both are upward rotating, the rotating directions of the helical teeth of the first assembly hole and the second assembly hole are opposite.

[0102] At least one fixing hole is arranged on the first support assembly 2 and the second support assembly 3, so that the first support assembly and the second support assembly are fixed at both ends of the open door by the fixing member 5 through the fixing hole, as shown in Figure 17 Specifically, at least one first fixing hole 201 is arranged on the first support assembly 2, and at least one second fixing hole 301 is arranged on the second support assembly 3. The first support assembly 2 is fixed at one end of the open door through the fixing member and the first fixing hole 201, and the second support assembly 3 is fixed at the other end of the open door through the fixing member and the second fixing hole 301.

[0103] In order to better adapt to the shape of both ends of the open door and the connection stability of the adjustable lamina fixation plate system, the first support assembly 2 or / and the second support assembly 3 comprises a fixing part and a rotating arm. One end of the fixing part is connected with the first end part 101 or the second end part 102, and the other end of the fixing part is rotationally connected with the rotating arm. At least one fixing hole is arranged on the fixing part, and at least one fixing hole is arranged on the rotating arm.

[0104] It should be noted that the rotating direction of the rotating connection between the fixing part and the first end part or the second end part is the rotation around the rotating shaft. The rotating shaft B-B of the rotating connection between the fixing part and the rotating arm is perpendicular to the fixing plane where the fixing part is located, that is, the rotating arm is rotationally connected in the plane where the fixing part is located.

[0105] In the embodiment, one end of the open door is slender and the other end is wide, the slender end is fixed with the first support assembly, and the wide end is fixed with the second support assembly 3, as shown in Figure 18As shown, the first support assembly 2 is provided with two first fixing holes 201 arranged along the extension direction thereof, the second support assembly 3 comprises a fixed part 32 and a rotating arm 33, one end of the fixed part 32 is rotationally connected with the second end part 102, the other end of the fixed part 32 is rotationally connected with the rotating arm 33, the fixed part 32 and the rotating arm 33 are rotationally connected through a rotating pin 34, the rotating pin 34 sequentially penetrates the rotating arm 33 and the fixed part 32 to realize the rotational connection of the rotating arm and the fixed part 32, and the rotating pin 34 is perpendicular to the rotating arm 33 and the fixed part 32. The fixed part 32 is provided with one second fixing hole 302, and the rotating arm 33 is provided with one second fixing hole 302. When the second support assembly is fixed, the rotating arm 33 is rotated to a certain angle with the fixed part 32, which can not only improve the connection stability of the second support assembly, but also better adapt to the shape of the two ends of the door opening. The fixing part 5 is a screw.

[0106] The adjustable lamina fixation plate system of the present application is used, the extension directions of the first support assembly, the second support assembly and the lamina assembly are first rotated to be parallel (i.e. adjusted to the initial state), the expansion sleeve 6 (or the sleeve mentioned above) is used to enter the lamina gap (i.e. the door opening), as shown in the figure; then the length of the lamina assembly is adjusted by rotating the internal hexagonal driver; the angle between the first support assembly, the second support assembly and the lamina assembly is adjusted, and the angle between the fixed part and the rotating arm is adjusted, so as to adapt to the angle and shape of the door opening lamina osteotomy; then the locking part is tightened to lock the length of the lamina assembly; finally, the fixing part is fixed in the fixing hole of the first support assembly and the second support assembly, and the internal fixation is completed. Figure 19 The present application designs a new type of lamina fixation plate system suitable for adjustment under the microscope, which allows entry through the microscope or sleeve to realize the concept of minimally invasive surgery.

[0107] The present application adopts a reliable gear and rack mechanism to realize continuous adjustment of the length of the lamina assembly, which can flexibly adapt to various door opening widths. In addition, the lamina assembly is provided with scale lines for displaying the length of the lamina, so that the surgeon can clearly see the length size of the adjustment in the environment under the microscope, ensuring accurate matching.

[0108] The angle between the first support assembly, the second support assembly and the lamina assembly of the present application can be flexibly adjusted to adapt to various lamina shapes. The first support assembly, the second support assembly and the lamina assembly are rotationally connected through a one-way rotation structure, and the one-way adjustment mechanism helps to reduce the probability of postoperative door closing failure.

[0109] The first support assembly or / and the second support assembly of the present application is provided with an angle-adjustable rotating arm to adapt to the shape of different door opening osteotomies.

[0110] The first support assembly or / and the second support assembly of the present application is provided with an angle-adjustable rotating arm to adapt to the shape of different door opening osteotomies.

[0111] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An adjustable vertebral laminar fixation plate system, characterized in that, Comprise: Lamina assembly, provided with a first end and a second end; the lamina assembly is configured to at least adjust the distance between the first end and the second end; The first support assembly is rotatably connected with the first end; The second support assembly is rotatably connected with the second end.

2. The adjustable laminar fixation plate system of claim 1, wherein, The lamina assembly comprises a first lamina element and a second lamina element; The first lamina element is provided with a first displacement part and the first end; The second lamina element is provided with a second displacement part and the second end; The first displacement part and the second displacement part cooperate to enable linear displacement movement between the first lamina element and the second lamina element, so as to adjust the distance between the first end and the second end.

3. The adjustable laminar fixation plate system of claim 2, wherein, The first lamina element and the second lamina element realize linear displacement movement through cooperating toothed engagement.

4. The adjustable laminar fixation plate system of claim 3, wherein, At least one side of the first lamina element is provided with a toothed part; The second lamina element is provided with a gear cooperating with the toothed part, and the gear is engaged with the toothed part.

5. The adjustable laminar fixation plate system of claim 4, wherein, The second lamina element is further provided with a sliding groove cooperating with the first lamina element, and a mounting groove cooperating with the gear; The first lamina element can be inserted into the sliding groove, and the gear is mounted in the mounting groove and can rotate in the mounting groove; The sliding groove and the mounting groove are in communication, and at least a part of the gear is located in the sliding groove and engaged with the toothed part.

6. The adjustable laminar fixation plate system of claim 4, wherein, The second lamina element is provided with a scale line; The upper surface of the gear is provided with an operation groove, which is equipped to at least enable the gear to be rotated by an operation tool cooperating with the operation groove.

7. The adjustable laminar fixation plate system of claim 6, wherein, The second lamina element further comprises a locking structure, which is configured to at least prevent the gear from rotating; The locking structure comprises: A through hole provided on the gear, the through hole is in communication with the operation groove and located below the operation groove; A locking hole provided on the gear mounting part of the second lamina element; A locking piece, which is configured to be locked into the locking hole through the through hole, and fasten the gear on the mounting part.

8. The adjustable laminar fixation plate system of any one of claims 1 to 7, wherein, The first support assembly and the first end, the second support assembly and the second end are rotatably connected through a rotating structure; The rotating structure is a one-way rotating structure; The rotating structure comprises: A rotating shaft, at least one end of the rotating shaft is provided with a one-way rotating assembly; A rotating shaft passage provided on the first end and the second end for the rotating shaft to pass through; A rotating shaft mounting part provided on the first support assembly and the second support assembly, the rotating shaft mounting part is provided with a mounting hole for mounting both ends of the rotating shaft, the mounting hole cooperates with the one-way rotating assembly, so that the rotating shaft can rotate one-way relative to the rotating shaft mounting part; The rotating shaft is located in the rotating shaft passage, and both ends of the rotating shaft pass out of the rotating shaft passage and are located in the mounting hole; One end of the rotating shaft provided with the one-way rotating assembly is provided with a boss, and the one-way rotating assembly is arranged on the boss; The one-way rotating assembly comprises a pawl and an elastic piece, one end of the pawl is rotatably connected with the boss or the end of the rotating shaft, and the other end of the pawl is provided with an elastic piece between the boss. The assembly hole is provided with a helical thread matched with the pawl.

9. The adjustable laminar fixation plate system of any one of claims 1 to 7, wherein, At least one fixing hole is arranged on the first support assembly and the second support assembly. The first support assembly or / and the second support assembly comprises a fixed part and a rotating arm, one end of the fixed part is connected with the first end part or the second end part, the other end of the fixed part is rotationally connected with the rotating arm, at least one fixing hole is arranged on the fixed part, and at least one fixing hole is arranged on the rotating arm.

10. The adjustable laminar fixation plate system of claim 1, wherein, The adjustable lamina fixation system is configured to be accessed through a mirror or a cannula. The adjustable lamina fixation system comprises an initial state, in which the thickness and the width are both smaller than the diameter of the cannula.

Images