Domino rebuilding device

Abstract

The invention relates to a domino rebuilding device, which comprises a domino body, the domino body comprises a hooking part, and one end of the hooking part is configured to be at least hooked on an old rod at a to-be-rebuilt position or hooked on the old rod at the to-be-rebuilt position and an old pedicle screw; and the fixing part is connected with the other end of the hooking part, the fixing part is configured to be at least capable of being connected with a new connecting rod, and the fixing part is provided with an assembling part matched with the connecting rod.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, in particular to a renovation domino device. Background Art

[0002] The traditional domino notch is large, and during revision surgery, the end of the connecting rod protrudes too short from the pedicle screw cap, making it impossible to connect to the adjacent screwed segment. If connection to the adjacent screwed segment is required, the end pedicle screw must be removed to connect the domino, which not only increases the operation time and difficulty, but also increases the risk of complications for patients. Summary of the Invention

[0003] In view of the above analysis, an embodiment of the present invention aims to provide a renovation domino device to at least solve one of the above problems.

[0004] The present invention provides a renovation domino device, comprising a domino body, wherein the domino body comprises:

[0005] a hooking portion, one end of which is configured to be hooked at least on an old rod at the site to be repaired, or on an old rod and an old pedicle screw at the site to be repaired;

[0006] The fixing portion is connected to the other end of the hooking portion, and the fixing portion is configured to be at least connectable to a new connecting rod. The fixing portion is provided with an assembly portion that matches the connecting rod.

[0007] Furthermore, the assembly portion is an assembly blind hole, and one end of the connecting rod is inserted into the assembly blind hole to achieve connection with the domino body;

[0008] Alternatively, the assembly portion is an assembly through hole penetrating the fixing portion, and the connecting rod is passed through the assembly through hole to achieve connection with the domino body;

[0009] Alternatively, the assembly portion is a U-shaped assembly groove that passes through the fixing portion, and the connecting rod is placed in the U-shaped assembly groove to achieve connection with the domino body;

[0010] When the assembly portion is an assembly through hole or an assembly U-shaped groove, the fixing portion is further provided with at least one fastening channel connected to the assembly portion, and the fastener passes through the fastening channel and abuts against the connecting rod in the assembly portion to fix the connecting rod on the fixing portion.

[0011] Furthermore, the renovation domino device further comprises an auxiliary tightening block, wherein the auxiliary tightening block is provided with:

[0012] an auxiliary tightening through hole matched with the connecting rod;

[0013] a second fixing hole communicating with the auxiliary tightening through hole;

[0014] an abutment groove matched with the end of the old rod to abut against the end of the old rod;

[0015] Wherein, the extending direction of the auxiliary tightening through hole is consistent with the extending direction of the assembly portion;

[0016] When the assembly part is a blind hole, the connecting rod is connected to the part to be repaired through the domino body and the auxiliary tightening block;

[0017] When the assembly portion is an assembly through hole or an assembly U-shaped groove, the connecting rod is connected to the part to be renovated through the domino body, or is connected to the part to be renovated through the domino body and the auxiliary tightening block.

[0018] Furthermore, the hooking portion is provided with a hooking groove that matches the old rod;

[0019] The hook groove is a "C"-shaped groove, and the width of the hook groove is smaller than the diameter of the old rod.

[0020] Furthermore, the hooking portion is provided with a first fixing hole communicated with the hooking groove, so that a fastener passes through the first fixing rod and abuts against the old rod in the hooking groove.

[0021] Furthermore, the hooking portion is further provided with a clamping slot which penetrates the hooking groove, and the clamping slot cooperates with the cap body of the old pedicle screw, so that the cap body is clamped into the clamping slot while the hooking groove is hooked on the old rod.

[0022] Furthermore, the assembly through hole and the assembly U-shaped groove are arranged horizontally, or are arranged at a certain angle to the horizontal plane;

[0023] The height of the connecting portion relative to the fixing portion is one of the following:

[0024] The top of the hooking portion is lower than the top of the fixing portion;

[0025] The top of the hooking portion is flush with the top of the fixing portion;

[0026] The top of the hooking portion is higher than the top of the fixing portion;

[0027] This allows different domino bodies to be adapted to different height differences between the old rod and the connecting rod, and connecting rods with different inclination angles.

[0028] Furthermore, the domino body also includes an adjusting portion, which is located between the hooking portion and the fixing portion and is configured to at least adjust the height of the fixing portion relative to the hooking portion and the angle of the assembly portion relative to the old rod.

[0029] Furthermore, the adjustment unit includes a housing and the following components located inside the housing:

[0030] First Plinth;

[0031] Second base;

[0032] A height adjustment mechanism is located between the first base and the second base, with two ends of the height adjustment mechanism passing through the first base and the second base to connect with the hooking portion and the fixing portion, respectively, and the height adjustment mechanism is configured to at least adjust the height of the fixing portion relative to the hooking portion;

[0033] An angle adjustment mechanism is provided on the first base and the second base, and is configured to be able to adjust the relative angle between the first base and the second base so as to be able to adjust the angle of the assembly portion relative to the old rod.

[0034] Furthermore, the first base and the second base are arranged opposite to each other, and the shape of the first base and the second base are both "L", the first base includes a first long plate and a first short plate vertically connected, the second base includes a second long plate and a second short plate vertically connected, the first long plate and the second long plate are arranged opposite to each other, and the height of the second long plate is greater than that of the first long plate, the first short plate and the second short plate are located between the first long plate and the second long plate, and the first short plate and the second short plate are located on the same horizontal plane;

[0035] The first long plate is provided with a through hole for one end of the height adjustment mechanism to pass through, the second long plate is provided with a displacement channel for the other end of the height adjustment mechanism to pass through, the height adjustment mechanism is provided with a displacement block that cooperates with the displacement channel, the displacement block is located in the displacement channel, and the displacement block is configured to be able to displace at least along the extension direction of the displacement channel;

[0036] The height adjustment mechanism further includes a first connecting member, a sliding rod assembly, and a second connecting member connected in sequence. The first connecting member passes through a through hole on the first base and is connected to the hooking portion. The second connecting member passes through a displacement block and is connected to the fixed portion. The displacement block is provided with a through hole for the second connecting member to pass through. The first connecting member and the second connecting member are universally connected to the sliding rod assembly via a cross shaft.

[0037] The height adjustment mechanism further includes a retaining rod and a retaining spring, wherein the retaining spring is located between the bottom of the displacement block and the bottom of the displacement channel. The retaining rod passes through the top of the second long plate, enters the displacement channel, and abuts against the top of the displacement block. The retaining rod is configured to have an adjustable length extending into the displacement channel, and the retaining spring is always in a compressed state.

[0038] The angle adjustment mechanism is located below the height adjustment mechanism, and the angle adjustment mechanism includes:

[0039] a first rotating portion, fixedly connected to the first base, wherein the first rotating portion is provided with a first toothed portion;

[0040] A second rotating part is fixedly connected to the second base; the second rotating part is provided with a second toothed portion, and the second toothed portion is meshed with the first toothed portion;

[0041] a connecting plate, one end of which is fixedly connected to the second base and the other end of which is rotatably connected to the first base;

[0042] The angle adjustment mechanism further includes a stabilizing rod, one end of which is rotatably connected to the center of the bottom end surface of the connecting plate, and the other end of which extends vertically to the housing and is rotatably connected to the housing;

[0043] The angle adjustment mechanism further includes an inserting strip, the shape of which matches the second toothed portion.

[0044] Compared with the prior art, the present invention can achieve at least one of the beneficial effects: the revision domino device of the present invention does not need to remove the original pedicle screws during revision, and can be extended on the original basis through the revision domino device of the present application, especially when the protrusion of the end of the old rod is shorter and the gap between the screws is narrow, the operation can be completed without removing the end screw, which can reduce the risk of surgical operation, reduce the difficulty of operation, and reduce the risk of complications for patients.

[0045] In the present invention, the above-mentioned technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of the present invention will be described in the following description, and some advantages will become apparent from the description or be learned through practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like parts throughout the drawings.

[0047] Figure 1 This is a schematic diagram of the structure of the domino body A and the connecting rod in a specific embodiment;

[0048] Figure 2 It is a structural diagram of the auxiliary tightening block in a specific implementation manner;

[0049] Figure 3 This is a schematic structural diagram of the cooperation between the domino device A and the connecting rod in a specific embodiment;

[0050] Figure 4 This is a structural diagram of a domino device A installed at a location to be renovated in a specific embodiment;

[0051] Figure 5 Schematic diagram of the structure of the domino body B in a specific embodiment (I);

[0052] Figure 6 Schematic diagram of the structure of the domino body B in a specific embodiment (II)

[0053] Figure 7 This is a structural diagram of a first structural variant of the domino body B in a specific embodiment;

[0054] Figure 8 This is a schematic structural diagram of the second structural variant of the domino body B in a specific embodiment;

[0055] Figure 9 This is a structural diagram of a domino device B installed at a location to be renovated in a specific embodiment;

[0056] Figure 10 Schematic diagram of the structure of the domino body C in a specific embodiment;

[0057] Figure 11 This is a schematic structural diagram of a first variant of the domino body C structure in a specific embodiment;

[0058] Figure 12 This is a schematic structural diagram of the second variant of the domino body C structure in a specific embodiment;

[0059] Figure 13 This is a structural diagram of a domino device C installed in a location to be renovated in a specific embodiment;

[0060] Figure 14 Schematic diagram of the structure of the domino body D in a specific embodiment;

[0061] Figure 15 This is a structural diagram of a domino device D installed in a location to be renovated in a specific embodiment;

[0062] Figure 16 It is a structural diagram of a domino device provided with an adjusting portion in a specific embodiment;

[0063] Figure 17 Schematic diagram of the structure of the adjustment part in a specific embodiment (1);

[0064] Figure 18 Schematic diagram of the structure of the adjustment part in a specific embodiment (II);

[0065] Figure 19 Schematic diagram of the structure of the internal components of the adjustment part housing in a specific embodiment (I);

[0066] Figure 20 Schematic diagram of the structure of the internal components of the regulating part housing in a specific embodiment (II);

[0067] Figure 21 Schematic diagram of the structure of the internal components of the regulating part housing in a specific embodiment (III);

[0068] Figure 22 1 is an exploded view of the slide bar assembly in a specific embodiment.

[0069] Reference numerals:

[0070] 1-domino body; 11-hook portion; 111-hook groove; 112-first fixing hole; 113-cage slot; 12-fixing portion; 121-assembly portion; 122-fastening channel; 2-connecting rod; 3-auxiliary tightening block; 31-auxiliary tightening through hole; 32-second fixing hole; 33-abutment groove; 4-adjustment portion; 41-housing; 42-first base; 421-first long plate; 422-first short plate; 43-second base; 431-second long plate; 432-second short plate; 433-displacement channel; 44-height adjustment mechanism; 441-displacement block; 442-first connecting member; 442a-first yoke portion; 443-sliding rod assembly ;443a-slide element;443b-slide rod element;443c-third yoke portion;443d-slideway;443e-fourth yoke portion;443f-slide rod portion;443g-limiting snap ring;443h-limiting protrusion;444-second connecting member;444a-second yoke portion;445-cross shaft;446-positioning rod;447-positioning spring;45-angle adjustment mechanism;451-first rotating portion;451a-first toothed portion;452-second rotating portion;452a-second toothed portion;453-connecting disk;454-stabilizing rod;455-insertion bar;46-first support member;47-second support member; DETAILED DESCRIPTION

[0071] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0072] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the term "connected" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0073] The terms "top," "bottom," "above," "below," and "on" used throughout the description refer to relative positions of components of a device, such as the relative positions of top and bottom substrates within a device. It will be understood that devices are multifunctional regardless of their orientation in space.

[0074] The working surface of the present invention can be a plane or a curved surface, can be inclined, or can be horizontal. For the convenience of description, the embodiment of the present invention is placed on a horizontal surface and used on the horizontal surface, and "high and low" and "up and down" are defined in this way.

[0075] A specific embodiment of the present invention discloses a domino repair device, such as Figures 1 to 22 As shown, it includes: a domino body, the domino body 1 includes:

[0076] A hooking portion 11, one end of which is configured to be hooked onto at least an old rod of a site to be repaired (the site to be repaired includes at least an old rod and an old pedicle screw), or onto the old rod and the old pedicle screw of the site to be repaired;

[0077] The fixing portion 12 is connected to the other end of the hooking portion 11. The fixing portion 12 is configured to be connected to at least a new connecting rod. The fixing portion 12 is provided with an assembly portion 121 that cooperates with the connecting rod 2, that is, the fixing portion 12 is connected to the connecting rod through the assembly portion 121.

[0078] The revision domino device of the present invention does not require the removal of the original pedicle screws during revision. The revision domino device of the present invention can be extended on the original basis, especially when the protrusion of the end of the old rod is shorter and the gap between the screws is narrow. The operation can be completed without removing the end screws, which can reduce the risk of surgical operation, reduce the difficulty of operation, and reduce the risk of complications for patients.

[0079] The hooking portion 11 is provided with a hooking groove 111 that matches the old rod, that is, the hooking portion 11 is hooked on the old rod through the hooking groove 111. The hooking groove 111 is a "C"-shaped groove, and the width of the slot of the hooking groove 111 (that is, the length of the hooking groove opening in the radial direction of the old rod) is smaller than the diameter of the old rod, so that the hooking portion 11 can be stably hooked on the old rod, that is, the slot wall of the hooking groove 111 can at least surround the old rod for more than half a circle. Therefore, the material of the hooking portion 11 is a material with a certain elasticity to ensure that the hooking portion 11 can be smoothly hooked on the old rod and is not easy to fall off. The opening direction of the slot of the hooking groove 111 is toward the bottom of the hooking portion 11.

[0080] In order to further improve the connection strength and connection stability between the hooking portion 11 and the old rod, the hooking portion 11 is provided with a first fixing hole 112 (only in the drawing) connected to the hook groove 111 on the side away from the fixing portion 12. Figures 14-15 As shown in FIG, the first fixing hole 112 is illustratively a threaded hole. A fastener (such as a bolt) passes through the first fixing hole 112 and abuts against the old rod in the hook groove 111 to further fix the hooking portion 11 on the old rod.

[0081] According to a preferred embodiment of the present invention, the hooking portion 11 is further provided with a latching slot 113 that extends through the hooking slot 111. The latching slot 113 cooperates with the cap of the old pedicle screw. That is, the hooking slot 113 is hooked onto the old rod while the cap is locked into the latching slot 113, further enhancing the connection strength between the hooking portion 11 and the area to be repaired. The latching slot 113 is located above the hooking slot 111, that is, it is provided at the top of the hooking portion 11. The latching slot 113 extends downward to form a groove that cooperates with the cap and extends through the hooking slot 111.

[0082] The assembly portion 121 may be an assembly blind hole, such as Figures 1-2 As shown, one end of the connecting rod 2 is inserted into the assembly blind hole to achieve connection with the domino body; the assembly portion 121 can be an assembly through hole that passes through the fixing portion 12, such as Figures 5 to 9 As shown, the connecting rod 2 is inserted into the assembly through hole to achieve connection with the domino body; the assembly portion 121 can be an assembly U-shaped groove that passes through the fixing portion 12, such as Figures 10-15 As shown, the connecting rod 2 is placed in the assembly U-shaped groove to achieve connection with the domino body, and the opening of the assembly U-shaped groove faces upward, that is, the assembly U-shaped groove is opened at the top of the fixing part 12, and the assembly U-shaped groove extends downward to form a "U"-shaped groove.

[0083] The direction of the opening of the hook groove is defined as up and down, the distribution direction of the hooking portion and the fixing portion is defined as left and right, and another direction in the three-dimensional direction is defined as front and back. Figure 5 shown.

[0084] The assembly blind hole is located at the front end surface of the fixing portion 12 , and the assembly through hole and the assembly U-shaped groove both extend from the front end surface to the rear end surface of the fixing portion 12 .

[0085] When the assembly portion 121 is an assembly through hole or an assembly U-shaped groove, the fixing portion 12 is further provided with at least one fastening channel 122 connected to the assembly portion 121, and a fastener (such as a bolt) passes through the fastening channel 122 to abut against the connecting rod in order to fix the connecting rod on the fixing portion. For example, when the assembly portion 121 is an assembly through hole, the fastening channel 122 is a fastening threaded hole; when the assembly portion 121 is an assembly U-shaped groove, the fastening channel 122 is composed of threaded grooves located on the left and right walls of the assembly U-shaped groove. The threaded grooves located on the left and right walls of the assembly U-shaped groove are arranged relative to each other and have the same central axis, that is, the threaded grooves are part of the same cylindrical threaded channel, so that the bolt can be fastened in the relative threaded groove. Preferably, there are two fastening channels 122, which are arranged on both sides of the hooking portion, that is, the hooking portion is located between the two fastening channels, so as to better fix the connecting rod in the assembly portion. The fastening channel 122 extends downward from the upper surface of the fixing portion 12 to communicate with the assembly through hole, or the fastening channel extends from the upper surface of the fixing portion 12 to near the starting point of the bottom arc of the assembly U-shaped groove.

[0086] In order to improve the connection strength and stability between the domino body and the part to be renovated, the renovation domino device further includes an auxiliary tightening block 3, which is provided with:

[0087] An auxiliary tightening through hole 31 that cooperates with the connecting rod 2, i.e., the connecting rod 2 can pass through the auxiliary tightening through hole 31, and the auxiliary tightening through hole 31 passes through the auxiliary tightening block 3, i.e., the auxiliary tightening through hole 31 extends from the front end surface of the auxiliary tightening block to the rear end surface of the auxiliary tightening block 3;

[0088] a second fixing hole 32 communicating with the auxiliary tightening through hole 31, the second fixing hole 32 extending downward from the upper surface of the auxiliary tightening block 3 to the second fixing hole 32. Exemplarily, the second fixing hole 32 is a threaded hole, and a fastener (such as a bolt) passes through the second fixing hole and abuts against the connecting rod in the auxiliary tightening through hole 31 to further strengthen the connection strength between the renovation domino device and the connecting rod;

[0089] The end of the old rod is inserted into the abutment groove 33 which matches the end of the old rod, so as to enhance the connection strength between the renovation domino device and the part to be renovated.

[0090] After the domino body is connected to the part to be renovated, the auxiliary tightening block 3 is passed through the connecting rod 2 and fixed to the end of the old rod, that is, the auxiliary tightening block 3 is installed on the front side of the domino body to assist the domino body in making the connection between the connecting rod and the part to be renovated stable.

[0091] For example, the auxiliary tightening block 3 is L-shaped, such as Figure 2 As shown, the auxiliary tightening block 3 includes a transverse portion and a longitudinal portion that are vertically arranged. The auxiliary tightening through hole 31 and the second fixing hole 32 are located in the transverse portion, and the abutting groove 33 is located in the longitudinal portion.

[0092] The extension direction of the auxiliary tightening through hole 31 is consistent with the extension direction of the assembly part 121 to avoid torsion when the connecting rod is connected to the domino body and the auxiliary tightening block, that is, to avoid the connection rod being twisted and affecting its use due to the extension direction of the auxiliary tightening through hole 31 and the extension direction of the assembly part 121 no longer being in a straight line.

[0093] It should be noted that when the assembly portion 121 is a blind hole, the connecting rod is connected to the part to be repaired through the domino body and the auxiliary tightening block. Figure 4 When the assembly portion 121 is an assembly through hole or an assembly U-shaped groove, the connecting rod can be connected to the part to be renovated only through the domino body, or can be connected to the part to be renovated through the domino body and the auxiliary tightening block. The latter connection effect is more stable.

[0094] In order to better adapt to different usage situations, the assembly through hole and the assembly U-shaped groove can be set horizontally, that is, the central axis of the assembly through hole is set horizontally, and the bottom of the assembly U-shaped groove is set horizontally. The assembly through hole and the assembly U-shaped groove can also be at a certain angle to the horizontal plane to adapt to the situation where the connecting rod needs to be slightly tilted, that is, the central axis of the assembly through hole is at a certain angle to the horizontal plane, and the bottom of the assembly U-shaped groove is at a certain angle to the horizontal plane. Exemplarily, the angle between the assembly through hole and the assembly U-shaped groove and the horizontal plane is 0 to 5°, and the assembly through hole can be tilted downward or upward. The domino body with an assembly through hole and an assembly U-shaped groove with a suitable tilt direction and tilt angle is selected according to the specific usage situation.

[0095] Furthermore, in order to better adapt to different usage situations, the height of the hooking portion relative to the fixing portion can be set to various levels to adjust the height between the old rod and the connecting rod. For example, the top of the hooking portion 11 is lower than the top of the fixing portion 12, that is, the top of the hooking groove 111 is lower than the top of the fixing portion 12. Figures 5-6 and Figure 10 , at this time, the old rod and the connecting rod are almost flush with each other; the top of the hooking portion 11 is flush with the top of the fixing portion 12, that is, the top of the hooking groove 111 is almost parallel to the top of the fixing portion 12, such as Figure 8 and Figure 12 As shown, the height of the old rod can be slightly higher than the height of the connecting rod; the top of the hooking portion 11 is higher than the top of the fixing portion 12, that is, the top of the hook groove 111 is higher than the top of the fixing portion 12, as shown Figure 7 and Figure 11 As shown, the height of the old rod can be made much higher than the height of the connecting rod.

[0096] According to different assembly through holes, assembly U-shaped grooves and the angle between the horizontal plane, and different relative heights of the hooking part and the fixing part, a variety of domino bodies of different specifications can be set, so that different domino bodies can be adapted to different height differences between the old rod and the connecting rod, and connecting rods with different inclination angles.

[0097] Figures 1 to 4 An embodiment of the present invention is provided, namely a domino renovation device A, which includes a domino body 1 (domino body A) and an auxiliary tightening block 3. The domino body 1 includes a hooking portion 11 and a fixing portion 12. One end of the hooking portion 11 is provided with a hooking groove 111, and the other end is connected to the fixing portion 12. The front end face of the fixing portion 12 is provided with an assembly portion 121 (i.e., an assembly blind hole) for inserting the connecting rod 2. The shape of the domino body is similar to a "," plate. The auxiliary tightening block 3 is L-shaped, and the auxiliary tightening block 3 includes a vertically arranged horizontal portion and a vertical portion. The horizontal portion is provided with an auxiliary tightening through-hole 31 that passes through the front and back, and a second fixing hole 32 connected to the auxiliary tightening through-hole 31 is provided on the top of the horizontal portion. The rear end face of the vertical portion is provided with an abutment groove 33 that can abut against the end of the old rod, and the front end faces of the horizontal and vertical portions are flush. Figure 4 This is a schematic diagram of the assembly of the renovation domino device A, the connecting rod, and the area to be renovated. The hooking portion 1 is hooked onto the old rod between the two old pedicle screws through the hook groove 111. The connecting rod 2 is inserted into the assembly blind hole. The auxiliary tightening block is then passed through the connecting rod through the auxiliary tightening channel. The auxiliary tightening block is slid so that the end of the old rod is inserted into the abutment groove. The fastener is screwed into the second fixing hole and tightened against the connecting rod, thereby extending the area to be renovated through the connecting rod and the renovation domino device A. In actual application, the connecting rod 2 can be integrally formed with the domino body A. The domino device A is tightened by the auxiliary tightening block and the end of the old rod. After tightening to the appropriate position, the fastener is used to lock it. This is particularly suitable for situations where the end of the old rod protrudes from the old pedicle screw cap and is shorter than the old pedicle screw cap.

[0098] Figures 5 to 9 An embodiment of the present invention is provided, namely, a domino renovation device B, comprising a domino body 1 (i.e., domino body B). The domino body B comprises a hooking portion 11 and a fixing portion 12. The hooking portion 11 has a hooking groove 111 at one end and is connected to the fixing portion 12 at the other end. The fixing portion 12 has an assembly portion 121 (i.e., an assembly through-hole) for the connecting rod 2 to pass through. The assembly through-hole extends from the front end face to the rear end face of the fixing portion 12. The top end face of the fixing portion 12 has two fastening passages 122 (i.e., fastening threaded holes) that extend through the assembly through-hole. The fixing portion 12 is rectangular in shape. Figure 5 、 Figure 7 and Figure 8 The difference is that the height of the connecting portion 11 relative to the fixing portion 12 is different. Figure 5 The top of the middle hooking portion 11 is lower than the top of the fixing portion 12. Figure 7The top of the middle hooking portion 11 is higher than the top of the fixing portion 12. Figure 8 The top of the hooking portion 11 is flush with the top of the fixing portion 12. Figure 9 This is a schematic diagram of the assembly of the Domino device B, the connecting rod, and the part to be renovated during renovation. The hooking portion 1 is hooked on the old rod between the two old pedicle screws through the hook groove 111, the connecting rod 2 is inserted into the assembly channel, and the fastener is screwed into the fastening threaded hole and tightened against the connecting rod 2, so that the part to be renovated can be extended through the connecting rod and the renovation Domino device B.

[0099] Figures 10 to 13 Another embodiment of the present invention is provided, namely, a renovation domino device C, which includes a domino body 1 (i.e., domino body C). The domino body C includes a hooking portion 11 and a fixing portion 12. One end of the hooking portion 11 is provided with a hook groove 111, and the other end is connected to the fixing portion 12. The fixing portion 12 is provided with an assembly portion 121 (i.e., an assembly U-shaped groove) for the connecting rod 2 to pass through. The assembly U-shaped groove extends from the front end face to the rear end face of the fixing portion 12. The top of the fixing portion 12 is provided with two fastening channels 122 (the fastening channels are composed of opposite threaded grooves, Figures 11-12 The fastening channel is not shown). The fixing portion 12 is in the shape of a U-shaped block. Figure 10 、 Figure 11 and Figure 12 The difference is that the height of the connecting portion 11 relative to the fixing portion 12 is different. Figure 10 The top of the middle hooking portion 11 is lower than the top of the fixing portion 12. Figure 11 The top of the middle hooking portion 11 is higher than the top of the fixing portion 12. Figure 12 The top of the hooking portion 11 is flush with the top of the fixing portion 12. Figure 13 This is a schematic diagram of the assembly of the Domino device C, the connecting rod, and the part to be renovated during renovation. The hooking portion 1 is hooked on the old rod between the two old pedicle screws through the hook groove 111, the connecting rod 2 is inserted into the assembly U-shaped groove, and the fastener is screwed into the opposite threaded grooves and tightened against the connecting rod 2, so that the part to be renovated can be extended through the connecting rod and the renovation Domino device C.

[0100] Figures 14 and 15Another embodiment of the present invention is provided, namely, a renovation domino device D, which includes a domino body 1 (i.e., domino body D). The domino body D includes a connecting portion 11 and a fixing portion 12. A card slot 113 is provided at the top of the connecting portion 11, and a hooking groove 111 connected to the card slot 113 is provided at the bottom of the connecting portion 11. A first fixing hole 112 that is connected to the hooking groove 111 is provided on the left end face of the connecting portion 11 (i.e., the side away from the fixing portion 12). The connecting portion 11 is in the shape of a rectangular block, and the four corners away from the fixing portion 12 are chamfered. An arc-shaped transition is used at the connection between the connecting portion 11 and the fixing portion 12. The fixing portion 12 is provided with an assembly portion 121 (i.e., an assembly U-shaped groove) for the connecting rod 2 to pass through. The assembly U-shaped groove extends from the front end face to the rear end face of the fixing portion 12. The top of the fixing portion 12 is provided with two fastening channels 122 that are connected to the assembly through hole (the fastening channels are composed of opposite threaded grooves, Figure 14 The fastening channel is not shown). The fixing portion 12 is in the shape of a U-shaped block. Figure 15 This is a schematic diagram of the assembly of the Domino device D, the connecting rod, and the part to be renovated. The hooking part 1 clamps the old pedicle screw cap body through the clamping groove 113 and the hooking groove 111, and hooks the old rod at the same time. The fastener is screwed into the first fixing hole 112 and pressed against the old rod. The connecting rod 2 is inserted into the assembly U-shaped groove, and the fastener is screwed into the relative threaded grooves and pressed against the connecting rod 2, so that the part to be renovated can be extended through the connecting rod and the renovation Domino device D.

[0101] Of course, the structure of the renovation domino device of the present invention not only includes the above-mentioned example types. In actual applications, various combinations of the technical features provided by the present invention can be designed to be used in different application scenarios.

[0102] According to a preferred embodiment of the present invention, the present invention also includes an adjusting portion 4, which is located between the hooking portion 11 and the fixing portion 12 and is configured to at least be able to adjust the height of the fixing portion 12 relative to the hooking portion 11 and the angle of the assembly portion 121 relative to the old rod.

[0103] The adjusting portion 4 includes a housing 41 and the following components located inside the housing 41:

[0104] a first base 42;

[0105] Second base 43;

[0106] A height adjustment mechanism 44 is located between the first base 42 and the second base 43, with two ends of the height adjustment mechanism 44 passing through the first base 42 and the second base 43 to connect with the hooking portion 11 and the fixing portion 12, respectively. The height adjustment mechanism 44 is configured to at least adjust the height of the fixing portion 12 relative to the hooking portion 11;

[0107] The angle adjustment mechanism 45 is arranged on the first base 42 and the second base 43. The angle adjustment mechanism 45 is configured to at least adjust the relative angle between the first base 42 and the second base 43, that is, the first base 42 and the second base 43 are rotatably connected through the angle adjustment mechanism 45, thereby adjusting the angle of the assembly part 121 relative to the old rod.

[0108] The first base 42 and the second base 43 are arranged relative to each other, leaving space between them for assembling the height adjustment mechanism 44 and the angle adjustment mechanism 45. Exemplarily, the first base 42 and the second base 43 are both L-shaped, i.e., both include vertically connected long and short plates. Specifically, the first base 42 includes a vertically connected first long plate 421 and a first short plate 422, and the second base 43 includes a vertically connected second long plate 431 and a second short plate 432. The first long plate 421 and the second long plate 423 are arranged relative to each other, and the second long plate 431 is taller than the first long plate 421. The first short plate 422 and the second short plate 432 are located between the first long plate 421 and the second long plate 431, and the first short plate 422 and the second short plate 432 are located on the same horizontal plane.

[0109] The first base 42 is provided with a through hole for one end of the height adjustment mechanism to pass through. Specifically, the through hole is located at the upper portion of the first long plate 421 .

[0110] The second base 43 is provided with a displacement channel 433 through which the other end of the height adjustment mechanism passes. The height adjustment mechanism 44 is provided with a displacement block 441 that cooperates with the displacement channel 433. The displacement block 441 is located within the displacement channel 433 and is configured to be displaceable at least along the extension direction of the displacement channel 433. Specifically, the displacement channel 433 is located on the second long plate 431, and the extension direction of the displacement channel 433 is consistent with the extension direction of the second long plate 431. That is, the height of the displacement block 441 on the long plate 431 is adjusted by moving the displacement block 441 within the displacement channel 433. Exemplarily, the displacement channel 433 is provided with slide rails on both sides, and the displacement block 441 is a slider. Rotatable runway tooth chains are provided on both sides of the displacement channel, and the displacement block 441 has teeth on both sides that cooperate with the tooth chains. This arrangement not only improves the connection strength between the displacement block and the displacement channel while maintaining the movement of the displacement block, but also facilitates accurate control of the height of the displacement block 441.

[0111] The height adjustment mechanism 44 further includes a first connecting member 442, a slide bar assembly 443, and a second connecting member 444, which are sequentially connected. The first connecting member 442 passes through a through hole in the first base 42 and is connected to the hooking portion 11. The second connecting member 444 passes through a displacement block 441 and is connected to the fixed portion 12. The displacement block 441 has a through hole for the second connecting member 444 to pass through. This arrangement allows the height of the fixed portion 12 relative to the hooking portion 11 to be adjusted by adjusting the height of the displacement block 441 within the displacement channel 433.

[0112] The first connecting member 442 and the second connecting member 444 are universally connected to the slide rod assembly 443 through a cross shaft 445 respectively. Such a setting can not only ensure smooth height adjustment and angle adjustment, but also improve the connection strength between the first base and the second base.

[0113] Specifically, one end of the first connecting member 442 passes through the through hole and is fixedly connected to the hooking portion 11 via the first support member 46. The other end of the first connecting member 442 is provided with a first yoke portion 442a. One end of the second connecting member 444 passes through the displacement block 441 and is fixedly connected to the fixing portion 12 via the second support member 47. The other end of the second connecting member 444 is provided with a second yoke portion 444a. The sliding rod assembly 443 includes a sliding cylinder element 443a and a sliding rod element 443b that are slidably connected. One end of the sliding cylinder element 443a is provided with a third yoke portion 443c, and the other end is provided with a slideway 443d extending inwardly. One end of the sliding rod element 443b is provided with a fourth yoke portion 443e, and the other end is provided with a sliding rod portion 443f that cooperates with the slideway 443d. That is, the sliding rod portion 443f is located within the slideway 443d, and the sliding rod portion cooperates with the slideway to achieve a sliding connection between the sliding cylinder element and the sliding rod element. The first yoke portion 442a and the third yoke portion 443c are pivotally connected via a cross axis 445, and the second yoke portion 444a and the fourth yoke portion 443e are pivotally connected via another cross axis 445. It should be noted that the pivotal connection between the third and fourth yoke portions is also arranged in a cross shape to enhance the mobility of the first connector 442, the slide bar assembly 443, and the second connector 444, thereby making the adjustment of the adjustment portion more flexible and smooth.

[0114] To prevent the slide rod from falling off the slide, a limiting clamp 443g is provided at the slide mouth, and a limiting protrusion 443h is provided at the end of the slide rod. The diameter of the limiting protrusion is larger than the caliber of the limiting clamp to ensure that the limiting protrusion is always located in the slide.

[0115] Preferably, the sliding rod portion 443f is made of a material with a certain elasticity to better cooperate with the angle and height adjustment of the adjustment portion.

[0116] In order to stably fix the displacement block at a certain height, the height adjustment mechanism 44 also includes a positioning rod 446 and a positioning spring 447. The positioning spring 447 is located between the bottom of the displacement block 441 and the bottom of the displacement channel. The positioning rod 446 passes through the top of the second long plate 431 and enters the displacement channel 443 to abut against the top of the displacement block. The length of the positioning rod 446 extending into the displacement channel 443 is adjustable. The positioning spring 447 is always in a compressed state to provide an upward elastic force for the displacement block. The elastic force can balance the gravity of the displacement block and the downward thrust of the positioning rod 446, so that the displacement block is fixed at a certain position in the displacement channel. For example, a threaded through hole is provided on the top of the second long plate 431 that passes through the displacement channel. The positioning rod is a screw. The screw cooperates with the threaded through hole to adjust the length of the screw extending into the displacement channel, thereby controlling the height of the displacement block.

[0117] The angle adjustment mechanism 45 is located below the height adjustment mechanism 44 and includes:

[0118] The first rotating portion 451 is fixedly connected to the first base 42 and has a first toothed portion 451a;

[0119] The second rotating portion 452 is fixedly connected to the second base 43; the second rotating portion 451 is provided with a second toothed portion 452a, and the second toothed portion 452a is meshed with the first toothed portion 451a;

[0120] The connecting disk 453 has one end fixedly connected to the second base 43 and the other end rotatably connected to the first base 42 .

[0121] Angle adjustment is achieved through tooth meshing. On the one hand, it can improve the connection strength and stability of the first base and the second base; on the other hand, it can improve the stability and accuracy of the angle adjustment and can stop at a certain angle more accurately.

[0122] To improve the compactness of the adjustment unit, the first rotating portion 451 is fixedly connected to the top end of the first short plate 422 (the end away from the first long plate), and the second rotating portion 452 is fixedly connected to the top end of the second short plate 432 (the end away from the second long plate). One end of the connecting plate 453 is fixedly connected to the bottom end surface of the second short plate 432, and the other end of the connecting plate 453 is rotatably connected to the bottom end surface of the first short plate 432, with the rotation axis passing through the rotation center of the first rotating portion 451.

[0123] Preferably, the first toothed portion 451a extends beyond the end of the first short plate 422, and the second toothed portion 452a extends beyond the end of the second short plate 432, to ensure smooth angle adjustment of the first base 42 and the second base 43. For example, the first rotating portion and the second rotating portion are both half gears.

[0124] In order to improve the rotational stability of the angle adjustment mechanism, the angle adjustment mechanism 45 also includes a stabilizing rod 454, one end of which is rotatably connected to the center of the bottom end surface of the connecting plate 453, and the other end of the stabilizing rod 454 extends vertically to the shell 41 and is rotatably connected to the shell.

[0125] In order to stably fix the relative angle between the first base and the second base at a certain angle, the angle adjustment mechanism 45 also includes an insertion bar 455. The shape of the insertion bar 455 matches the second toothed portion 452a, that is, the insertion bar 455 can be inserted into a certain tooth opening of the second toothed portion 452a. When the insertion bar is inserted into the second toothed portion, it can prevent the second base and the first base from rotating relative to each other, thereby fixing the relative angle between the first base and the second base at a desired angle.

[0126] It should be noted that the insertion strip 455 passes through the shell 41 and is inserted into the second toothed portion. In order to prevent the insertion strip 455 from accidentally falling into the adjustment portion 4, the insertion strip 455 is provided with a snap portion (not shown in the drawings), and the shell 41 is provided with a snap-fit portion (not shown in the drawings) that cooperates with the snap portion, so that the insertion strip can be fixed to the shell.

[0127] In order to ensure that the height and angle adjustment of the adjusting portion are not affected by the housing 41, the housing 41 is provided with:

[0128] The first window 401 is located on the side where the adjusting portion 4 is connected to the hooking portion 11 (i.e., the left side of the housing) for the first supporting member 46 to pass through;

[0129] The second window 402 is located on the side where the adjustment portion 4 is connected to the fixing portion 12 (i.e., the right side of the housing) to allow the second support member 47 to pass through and move, and the stabilizing rod 447 to be inserted and moved;

[0130] The third window 403 is located at the front side of the housing and is opposite to the first rotating portion 451 and the second rotating portion 452 to allow space for the first rotating portion and the second rotating portion to rotate;

[0131] The fourth window 404 is located on the rear side of the housing and is opposite to the first rotating portion 451 and the second rotating portion 452 to allow space for rotation between the first rotating portion and the second rotating portion. The fourth window and the third window are symmetrically arranged on the front and back sides of the housing.

[0132] The insertion opening 405 is located at the bottom of the housing, opposite to the second toothed portion 452 a , for the insertion of the insertion strip 455 .

[0133] The adjustment portion 4 can be combined with the various types of hooking and fixing portions described above to form a domino device for revision surgery, thereby adjusting the relative height and angle between the hooking and fixing portions. During use, the angle and height can be adjusted and fixed using the adjustment portion according to the intended location, and then the domino device can be surgically inserted into the patient.

[0134] The present invention provides various types of domino devices for revision surgeries in the upper thoracic and thoracolumbar regions. These devices eliminate the need for pedicle screw removal and can be used when the end of the connecting rod is short. They also allow for adjustment of angle and height, reducing surgical risk. The domino devices are reliable and practical, facilitating rapid, smooth, and safe surgical procedures.

[0135] The domino device of the present invention is suitable for posterior spinal revision surgery, where the protrusion at the end of the old rod is short and the gap between the screws is narrow. The operation can be completed without removing the end screw. The domino device of the present invention has various forms and can be used as needed during surgery. The domino device of the present invention can connect connecting rods of different diameters, specifications, and materials and suitable fasteners. Compared with the existing domino body, the domino device of the present invention has a smaller notch, which solves the problem of being unable to place a rod during revision surgery.

[0136] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A domino renovation device, characterized in that: The domino body comprises: a hooking portion, one end of which is configured to be hooked at least on an old rod at the site to be repaired, or on an old rod and an old pedicle screw at the site to be repaired; The fixing portion is connected to the other end of the hooking portion, and the fixing portion is configured to be at least connectable to a new connecting rod. The fixing portion is provided with an assembly portion that matches the connecting rod.

2. The renovation domino device according to claim 1, characterized in that: The assembly portion is an assembly blind hole, and one end of the connecting rod is inserted into the assembly blind hole to achieve connection with the domino body; Alternatively, the assembly portion is an assembly through hole penetrating the fixing portion, and the connecting rod is passed through the assembly through hole to achieve connection with the domino body; Alternatively, the assembly portion is a U-shaped assembly groove that passes through the fixing portion, and the connecting rod is placed in the U-shaped assembly groove to achieve connection with the domino body; When the assembly portion is an assembly through hole or an assembly U-shaped groove, the fixing portion is further provided with at least one fastening channel connected to the assembly portion, and the fastener passes through the fastening channel and abuts against the connecting rod in the assembly portion to fix the connecting rod on the fixing portion.

3. The renovation domino device according to claim 2, characterized in that: It also includes an auxiliary tightening block, which is provided with: an auxiliary tightening through hole matched with the connecting rod; a second fixing hole communicating with the auxiliary tightening through hole; an abutment groove matched with the end of the old rod to abut against the end of the old rod; Wherein, the extending direction of the auxiliary tightening through hole is consistent with the extending direction of the assembly portion; When the assembly part is a blind hole, the connecting rod is connected to the part to be repaired through the domino body and the auxiliary tightening block; When the assembly portion is an assembly through hole or an assembly U-shaped groove, the connecting rod is connected to the part to be renovated through the domino body, or is connected to the part to be renovated through the domino body and the auxiliary tightening block.

4. The renovation domino device according to claim 3, characterized in that The hooking portion is provided with a hooking groove that matches the old rod; The hook groove is a "C"-shaped groove, and the width of the hook groove is smaller than the diameter of the old rod.

5. The renovation domino device according to claim 4, characterized in that: The hooking portion is provided with a first fixing hole communicated with the hooking groove, so that a fastener can pass through the first fixing rod and abut against the old rod in the hooking groove.

6. The renovation domino device according to claim 5, characterized in that: The hooking portion is further provided with a clamping slot which passes through the hooking groove, and the clamping slot cooperates with the cap body of the old pedicle screw so that the cap body is clamped into the clamping slot when the hooking groove is hooked on the old rod.

7. The renovation domino device according to claim 4, characterized in that The assembly through holes and assembly U-shaped grooves are arranged horizontally, or at a certain angle to the horizontal plane; The height of the connecting portion relative to the fixing portion is one of the following: The top of the hooking portion is lower than the top of the fixing portion; The top of the hooking portion is flush with the top of the fixing portion; The top of the hooking portion is higher than the top of the fixing portion; This allows different domino bodies to be adapted to different height differences between the old rod and the connecting rod, and connecting rods with different inclination angles.

8. The domino renovation device according to any one of claims 1 to 7, characterized in that: The domino body further includes an adjusting portion, which is located between the hooking portion and the fixing portion and is configured to at least adjust the height of the fixing portion relative to the hooking portion and the angle of the assembly portion relative to the old rod.

9. The renovation domino device according to claim 8, characterized in that The adjusting portion includes a housing and the following components located inside the housing: First Plinth; Second base; A height adjustment mechanism is located between the first base and the second base, with two ends of the height adjustment mechanism passing through the first base and the second base to connect with the hooking portion and the fixing portion, respectively, and the height adjustment mechanism is configured to at least adjust the height of the fixing portion relative to the hooking portion; An angle adjustment mechanism is provided on the first base and the second base, and is configured to be able to adjust the relative angle between the first base and the second base so as to be able to adjust the angle of the assembly portion relative to the old rod.

10. The renovation domino device according to claim 9, characterized in that The first base and the second base are arranged opposite to each other, and the first base and the second base are both in the shape of an "L", the first base includes a first long board and a first short board vertically connected, the second base includes a second long board and a second short board vertically connected, the first long board and the second long board are arranged opposite to each other, and the height of the second long board is greater than that of the first long board, the first short board and the second short board are located between the first long board and the second long board, and the first short board and the second short board are located on the same horizontal plane; The first long plate is provided with a through hole for one end of the height adjustment mechanism to pass through, the second long plate is provided with a displacement channel for the other end of the height adjustment mechanism to pass through, the height adjustment mechanism is provided with a displacement block that cooperates with the displacement channel, the displacement block is located in the displacement channel, and the displacement block is configured to be able to displace at least along the extension direction of the displacement channel; The height adjustment mechanism further includes a first connecting member, a sliding rod assembly, and a second connecting member connected in sequence. The first connecting member passes through a through hole on the first base and is connected to the hooking portion. The second connecting member passes through a displacement block and is connected to the fixed portion. The displacement block is provided with a through hole for the second connecting member to pass through. The first connecting member and the second connecting member are universally connected to the sliding rod assembly via a cross shaft. The height adjustment mechanism further includes a retaining rod and a retaining spring, wherein the retaining spring is located between the bottom of the displacement block and the bottom of the displacement channel. The retaining rod passes through the top of the second long plate, enters the displacement channel, and abuts against the top of the displacement block. The retaining rod is configured to have an adjustable length extending into the displacement channel, and the retaining spring is always in a compressed state. The angle adjustment mechanism is located below the height adjustment mechanism, and the angle adjustment mechanism includes: a first rotating portion, fixedly connected to the first base, wherein the first rotating portion is provided with a first toothed portion; A second rotating part is fixedly connected to the second base; the second rotating part is provided with a second toothed portion, and the second toothed portion is meshed with the first toothed portion; a connecting plate, one end of which is fixedly connected to the second base and the other end of which is rotatably connected to the first base; The angle adjustment mechanism further includes a stabilizing rod, one end of which is rotatably connected to the center of the bottom end surface of the connecting plate, and the other end of which extends vertically to the housing and is rotatably connected to the housing; The angle adjustment mechanism further includes an inserting strip, the shape of which matches the second toothed portion.

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