Absorbable suspension plate

Abstract

The application discloses a kind of absorbable suspension plate, it includes a fixed plate, the fixed plate is equipped with two symmetrical first line loop hole, first line loop hole is equipped with line loop, the line loop is connected with ligament graft, the fixed plate is located on the both sides of movable plate respectively and is equipped with lead hole, the lead hole is respectively equipped with traction line, it further includes a movable plate, the fixed plate is opened in a sunken groove, the first line loop hole is located in sunken groove, the movable plate is located in sunken groove, the movable plate is opened with the second line loop hole that first line loop hole is communicated, the line loop is simultaneously passed through first line loop hole and second line loop hole.The application can accurately adjust the position of ligament graft, so as to improve the operation efficiency and speed.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically an absorbable suspension plate. Background Technology

[0002] The looped titanium plate fixation method is an endoscopic technique in ACL reconstruction surgery (i.e., cruciate ligament reconstruction). This method does not require an additional lateral condylar incision. By using an internal looped titanium plate, the upper ends of tendon grafts without bone fragments can be firmly fixed in the femoral bone tunnel. It is one of the current techniques for ACL reconstruction using grafts without bone fragments, such as the semitendinosus tendon and femoris tendon. Titanium plates are currently the mainstream material for femoral repair, with better tissue compatibility and the closest approximation to the biological characteristics of the original femur. For example, a looped titanium plate (CN202022078622.X) discloses a specific method of use in its instruction manual. The ligament is passed through the middle of the loop of the titanium plate and then folded in half. A perforated guide needle is used to pull the traction line and the loop-turning line out of the bone tunnel. The titanium plate is pulled out of the joint cavity through the traction line and the ligament in the loop is stretched into the bone tunnel. The loop-turning line is stretched, the vertical titanium plate is laid flat, and the traction line and the loop-turning line are pulled out. After the operation of the femoral end ligament is completed, the next step of the tibial end ligament is treated. Although the treatment goal can be achieved, it is usually necessary to adjust the ligament to its position in the bone tunnel during the operation. However, due to the very small size of the looped titanium plate, the flexibility during operation is poor, and it is very difficult to adjust the ligament through the looped titanium plate. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides an absorbable suspension plate that can precisely adjust the position of ligament grafts, thereby improving surgical efficiency and speed.

[0004] The technical solution adopted by this invention is as follows: An absorbable suspension plate is provided, comprising a fixed plate with two symmetrical first loop holes. A loop is inserted through each first loop hole, and a ligament graft is connected to the loop. Lead holes are provided on both sides of a movable plate on the fixed plate, and traction wires are inserted through each lead hole. The plate also includes a movable plate. A groove is formed on the fixed plate, with the first loop holes located within the groove. The movable plate is located within the groove, and a second loop hole communicating with the first loop holes is formed on the movable plate. The loop passes through both the first and second loop holes simultaneously.

[0005] With the above structure, the present invention has the following advantages: A groove is formed on the fixed plate, and the movable plate is detachably placed within the groove, allowing the movable plate to be separated from the fixed plate. A first loop hole is formed on the fixed plate, and a second loop hole is formed on the movable plate. The first and second loop holes are interconnected, and a suture loop passes through both holes simultaneously. A ligament graft is connected to the suture loop. A traction suture and a loop-turning suture are respectively threaded through two lead holes. By pulling the traction suture, the fixed plate, along with the movable plate, is stretched from one end of the bone tunnel to the other end. Pulling the suture loops allows the fixation plate and movable plate to be placed flat outside the bone tunnel opening, forming a fixation point. The movable plate is then separated from the fixation plate. By manipulating the suture loops on the movable plate, the ligament graft on the loops is pulled to a suitable position within the bone tunnel, thus achieving precise positioning of the ligament graft. This not only makes the operation more flexible but also greatly improves surgical efficiency and speed. Because the movable and fixation plates are separable, when the suture loops are pulled, the tension on the movable plate is partially borne by the fixation plate, thereby improving the load-bearing capacity of the movable plate and reducing the risk of breakage.

[0006] Preferably, the movable plate is provided with two limiting parts that insert into the first wire loop hole, and the second wire loop hole penetrates through the limiting parts, thereby strengthening the stability of the movable plate in the sinkhole and preventing the movable plate from shifting.

[0007] Preferably, the first loop hole is a square hole, and correspondingly, the limiting part is a cuboid shape to prevent the limiting part from rotating, thereby stabilizing the movable plate.

[0008] Preferably, the fixation plate is a cuboid plate structure with rounded ends along its length. The rounded ends can prevent the fixation plate from scratching the bone surface or ligaments, and also prevent the surgeon's gloves from being scratched during the operation.

[0009] Preferably, the settling tank is rectangular, and correspondingly, the movable plate is also rectangular, which radially limits the movable plate so that it will not rotate or shift radially after being inserted into the settling tank.

[0010] Preferably, the second loop hole is a square hole, unlike a round hole. When the loop passes through the square hole and is pulled straight, the loop is directly locked at the right-angle connection, preventing the loop from wobbling or shifting inside the hole.

[0011] Preferably, the lead hole is a circular hole, which is used to thread the traction wire. The circular hole allows the traction wire to move freely and does not hinder the stretching of the traction wire.

[0012] Preferably, the fixed plate and the movable plate are made of polylactic acid-glycolic acid copolymer / β-tricalcium phosphate or polylactic acid-glycolic acid copolymer / hydroxyapatite. These biocomposite materials have good tissue compatibility and are closest to the biological characteristics of the original femur.

[0013] Preferably, the fixed plate and the movable plate are made of rod-shaped material obtained by compression molding. The compression molding process creates a fiber structure inside the material that is arranged in the same direction as the compression molding. Finally, the finished fixed plate and movable plate are obtained by machining. The fiber structure can improve the mechanical properties and bending strength of the material, and the tensile strength of the rod-shaped material obtained by compression molding is also significantly improved.

[0014] Preferably, the fiber structure of the fixed plate is horizontal, making it less prone to lateral breakage; the fiber structure of the movable plate is vertical, and since the stretching direction of the loop in the second loop hole and the stretching direction of the traction wire in the lead hole are perpendicular to each other, the movable plate is prevented from cutting against the surface of the fixed plate after being subjected to force. Attached Figure Description

[0015] Figure 1 This is a top view of the overall structure of the present invention.

[0016] Figure 2 This is a bottom view of the overall structure of the present invention.

[0017] Figure 3 This is an exploded view of the overall structure of the present invention.

[0018] Among them, 1. Fixing plate; 1-1. First wire loop hole; 1-2. Lead wire hole; 1-3. Sinking groove; 2. Movable plate; 2-1. Second wire loop hole; 2-2. Limiting part; 3. Wire loop; 4. Ligament graft; 5. Traction wire; 6. Turning loop wire. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] This embodiment provides an absorbable suspension board, such as Figure 1 and 2 As shown, it includes a fixed plate 1 and a movable plate 2. Both the fixed plate 1 and the movable plate 2 are made of bio-composite absorbable material. The fixed plate 1 is a cuboid plate structure with a certain thickness. Both ends of the fixed plate 1 in the length direction are rounded or chamfered to avoid sharp edges.

[0021] A rectangular groove 1-3 is formed on one side of the fixed plate 1. Two symmetrically distributed first loop holes 1-1 are formed on the bottom surface of the groove 1-3, penetrating the other side of the fixed plate 1. The first loop holes 1-1 are distributed near both ends of the groove 1-3. The movable plate 2 is rectangular, similar in shape to the groove 1-3, allowing it to be stably embedded in the groove 1-3 without rotation or displacement. Two limiting parts 2-2 extend from the side of the movable plate 2 facing the bottom of the groove 1-3. When the movable plate 2 is embedded in the groove 1-3, the two limiting parts 2-2 precisely insert into the first loop holes 1-1. The movable plate 2 has two second loop holes 2-1 that correspond one-to-one with and communicate with the first loop holes 1-1. The limiting part 2-2 is used to limit the movable plate 2, so that the movable plate 2 can be stably embedded in the sink 1-3, preventing the movable plate 2 from easily separating from the fixed plate 1.

[0022] It should be noted that the first wire loop hole 1-1 and the second wire loop hole 2-1 are connected. The limiting part 2-2 is inserted into the first wire loop hole 1-1. The length of the limiting part 2-2 is less than or equal to the length of the first wire loop hole 1-1. That is, the limiting part 2-2 is located inside the first wire loop hole 1-1 or flush with the end of the first wire loop hole 1-1, and does not extend out of the first wire loop hole 1-1.

[0023] In this embodiment, as Figure 3 As shown, the first loop hole 1-1 is a square hole, and correspondingly, the limiting part 2-2 is a cuboid shape, so that the limiting part 2-2 forms a radial limit after being inserted into the first loop hole 1-1, preventing the limiting part 2-2 from shifting, thereby preventing the movable plate 2 from shifting.

[0024] It should be noted that after the movable plate 2 is embedded in the sink 1-3, the surfaces of the movable plate 2 and the fixed plate 1 are flush, making the movable plate 2 and the fixed plate 1 appear as one piece.

[0025] In addition, such as Figure 2 As shown, the second suture loop hole 2-1 is located near the edge of the limiting part 2-2, that is, the two second suture loop holes 2-1 are offset from both ends of the length direction of the fixing plate 1. The purpose of this design is that since a suture loop 3 is fixedly connected inside the second suture loop hole 2-1, that is, the suture loop 3 passes through and connects between the two second suture loop holes 2-1, that is, it is looped between the two second suture loop holes 2-1. A ligament graft 4 is fixedly connected to the suture loop 3. When the ligament graft 4 stretches the suture loop 3, so that the suture loop 3 is in a taut state, the suture loop 3 will be relatively tightened. Therefore, this design can maximize the distance of the suture loop 3 after it is relatively tightened, and avoid the ligament graft 4 from getting tangled together due to the relatively close distance after the suture loop 3 is tightened, which would affect the surgical effect.

[0026] The fixed plate 1 has lead wire holes 1-2 on both sides of the movable plate 2. The two lead wire holes 1-2 are used to insert the traction wire 5 and the loop wire 6, respectively. The specific method of using this invention is as follows:

[0027] First, fix the connecting loop 3 on the second loop hole 2-1 of the movable plate 2. After the loop 3 passes through the first loop hole 1-1, it is connected to the ligament graft 4. That is, one end of the ligament graft 4 is fixedly connected to the loop 3, and the other end is fixedly connected to an operating line. The traction line 5 and the loop-turning line 6 are respectively connected in the two lead holes 1-2 of the fixation plate 1. Embed the movable plate 2 into the fixation plate 1. First, pass the traction line 5 and the loop-turning line 6 through the bone tunnel. Pull the traction line 5 to pull the fixation plate 1 and the movable plate 2 vertically out of the bone tunnel to the other end of the bone tunnel. At the same time, pull the ligament graft 4 on the loop 3 to a suitable position in the bone tunnel. Then pull the loop-turning line 6 to place the fixation plate 1 flat outside the bone tunnel end and perform a series of operations on the ligament graft 4.

[0028] In this embodiment, the second suture loop hole 2-1 is a square hole instead of a circular hole. This allows the suture loop 3 to slide into the right angle between the two inner walls of the square hole when it is stretched after passing through the square hole. This provides a certain degree of restraint for the suture loop 3, preventing it from sliding within the second suture loop hole 2-1. Meanwhile, the lead hole 1-2 is a circular hole, allowing the traction wire 5 and the flip-loop wire 6 inside to move freely without causing jamming when pulling or pulling the traction wire 5 and the flip-loop wire 6, thus avoiding any impact on the surgery.

[0029] In addition, absorbable materials can be made from biocomposite materials such as polylactic acid-glycolic acid copolymer / tricalcium phosphate, polylactic acid-glycolic acid copolymer / hydroxyapatite, polylactic acid-glycolic acid copolymer / tricalcium phosphate / calcium sulfate, poly-L-lactic acid / tricalcium phosphate, poly-L-lactic acid / hydroxyapatite, poly-L-lactic acid / tricalcium phosphate / calcium sulfate, poly-L-lactic acid / polylactic acid-glycolic acid copolymer / tricalcium phosphate, and poly-L-lactic acid / polylactic acid-glycolic acid copolymer / hydroxyapatite, which can effectively inhibit adverse reactions and promote postoperative recovery.

[0030] The fixed plate 1 and the movable plate 2 are designed to be connected, which distributes the stress on the entire suspension plate, thus improving the load-bearing capacity of the suspension plate and making it less prone to breakage.

[0031] In addition to the movable connection design of the fixed plate 1 and the movable plate 2, the materials of the fixed plate 1 and the movable plate 2 are rod-shaped materials obtained by compression molding. The rod-shaped materials are easy to machine. The above-mentioned bio-composite material is compressed at 140℃-160℃ to obtain rod-shaped materials. Through the compression molding process, a large number of fiber structures, such as fiber crystals, are generated inside the material and arranged in the same direction as the compression molding. These fiber structures significantly improve the mechanical properties of the material, and the bending strength is increased by 100%-150%. At the same time, the tensile strength of the rod is also significantly improved with compression molding. Finally, the finished fixed plate 1 and movable plate 2 are obtained by machining.

[0032] The fiber structure of the fixed plate 1 is horizontal, which makes it less prone to transverse breakage. The fiber structure of the movable plate 2 is vertical. Since the tension direction of the inner loop of the second loop hole 2-1 and the tension direction of the inner wire of the lead hole 1-2 are perpendicular to each other, the movable plate 2 is prevented from cutting each other with the surface of the fixed plate 1 after being subjected to force, thereby causing wear and affecting the performance.

[0033] For those skilled in the art, various changes and modifications will undoubtedly be apparent after reading the above description. Therefore, the appended claims should be construed as covering all changes and modifications that encompass the true intent and scope of the invention. Any and all equivalent scope and content within the scope of the claims should be considered to remain within the intent and scope of the invention.

Claims

1. An absorbable suspension plate, comprising a fixed plate (1), wherein the fixed plate (1) is provided with two symmetrical first loop holes (1-1), a loop (3) is inserted into the first loop hole (1-1), a ligament graft is connected to the loop (3), and a lead hole (1-2) is provided on both sides of a movable plate (2) on the fixed plate (1), and a traction wire (4) is inserted into the lead hole (1-2), characterized in that: The suspension plate is absorbent; it also includes a movable plate (2), on which a groove (1-3) is opened, the first loop hole (1-1) is located in the groove (1-3), the movable plate (2) is detachably placed in the groove (1-3), the movable plate (2) has a second loop hole (2-1) communicating with the first loop hole (1-1), the loop (3) passes through both the first loop hole (1-1) and the second loop hole (2-1); the lead hole (1-2) is located in the movable plate. Both sides of the plate (2); the fixed plate (1) and the movable plate (2) are made of bio-composite absorbable material. The material of the fixed plate (1) and the movable plate (2) is a rod-shaped material obtained by compression molding. The compression molding process makes the material have a fiber structure arranged in the same direction as the compression molding. Finally, the finished fixed plate (1) and the movable plate (2) are obtained by machining. The fiber structure direction of the fixed plate (1) is horizontal, and the fiber structure direction of the movable plate (2) is vertical.

2. The absorbable suspension board according to claim 1, characterized in that: The movable plate (2) is provided with two limiting parts (2-2) that pass through the first wire loop hole (1-1), and the second wire loop hole (2-1) passes through the limiting parts (2-2).

3. The absorbable suspension board according to claim 2, characterized in that: The first loop hole (1-1) is a square hole, and correspondingly, the limiting part (2-2) is a cuboid shape.

4. The absorbable suspension board according to claim 1, characterized in that: The fixing plate (1) is a cuboid plate structure with rounded ends in the length direction.

5. The absorbable suspension board according to claim 1, characterized in that: The settling tank (1-3) is rectangular in shape, and correspondingly, the movable plate (2) is also rectangular in shape.

6. The absorbable suspension board according to claim 2, characterized in that: The second loop hole (2-1) is a square hole.

7. The absorbable suspension board according to claim 1, characterized in that: The lead hole (1-2) is a circular hole.

8. The absorbable suspension board according to claim 1, characterized in that: The fixed plate (1) and the movable plate (2) are made of polylactic acid-glycolic acid copolymer / β-tricalcium phosphate or polylactic acid-glycolic acid copolymer / hydroxyapatite.

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