Ligament tissue fixing assembly and implantation method thereof

Abstract

The invention relates to the technical field of orthopedic medical instruments, and discloses a ligament tissue fixing assembly and an implantation method thereof.The ligament tissue fixing assembly comprises a screw, a suspension piece and a screwdriver, the screw is provided with a first end and a second end which are oppositely arranged in the first direction, the screw is provided with a containing cavity penetrating through the first end and the second end in the first direction, and the containing cavity is used for containing a ligament; threads are arranged on the peripheral wall of the screw, a limiting groove extending towards the second end along the edge of the first end is formed in the peripheral wall of the screw, a through groove extending in the second direction is formed in the end face of the first end, and the through groove communicates with the containing cavity; the suspension piece is inserted into the through groove and does not protrude out of the peripheral wall of the screw and the end face of the first end. The screwdriver is provided with a holding end and a locking end which are oppositely arranged in the first direction, and the locking end is provided with a limiting part matched with the limiting groove in shape in a protruding mode in the first direction. Damage to ligament tissue can be reduced, and fixing stability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of orthopedic medical devices, and in particular to a ligament tissue fixing component and an implantation method thereof. Background Art

[0002] With the continuous advancement of medical technology, the diagnosis and treatment of musculoskeletal system injuries have gradually become an important research direction in the field of surgery. Among them, the repair and reconstruction of ligament injuries are particularly critical, especially in sports medicine and trauma surgery. The functional recovery of ligaments directly affects the patient's quality of life and athletic ability. The screw fixation method used in traditional ligament reconstruction surgery may cause cutting damage to ligament tissue, leading to postoperative pain and dysfunction, and its screws are prone to loosening during use, thereby affecting the stability of the ligament graft and increasing the risk of graft failure. Summary of the invention

[0003] The purpose of the present invention is to design a ligament tissue fixing component which has high stability and can reduce damage to the ligament tissue and an implantation method thereof.

[0004] In order to achieve the above object, the present invention provides a ligament tissue fixation assembly, comprising:

[0005] A screw having a first end and a second end arranged opposite to each other in a first direction, the screw being provided with a receiving cavity penetrating through the first end and the second end in the first direction, the receiving cavity being used to receive a ligament, the outer peripheral wall of the screw being provided with a thread, the outer peripheral wall of the screw being provided with a limiting groove extending along an edge of the first end toward the second end, a through groove extending in the second direction being provided on an end surface of the first end, the through groove being communicated with the receiving cavity;

[0006] A suspension piece, which is inserted into the through slot and does not protrude from the outer peripheral wall of the screw and the end surface of the first end;

[0007] A screwdriver, comprising a gripping end and a locking end arranged opposite to each other along a first direction, wherein the locking end is provided with a limiting portion protruding along the first direction and matching the shape of the limiting groove;

[0008] The first direction and the second direction are perpendicular to each other.

[0009] Furthermore, the suspension sheet is provided with a receiving channel penetrating along the second direction for receiving the bioactive material.

[0010] Furthermore, at least two limiting grooves are provided on the outer peripheral wall of the screw, and the limiting grooves are arranged in sequence and spaced apart along the circumference of the screw; the locking end is provided with limiting portions whose number is equal to the limiting grooves, and each limiting portion is arranged in one-to-one correspondence with each limiting groove.

[0011] Furthermore, the limiting grooves are evenly distributed along the circumference of the screw.

[0012] Furthermore, the limiting groove and the through groove are arranged in a staggered manner.

[0013] Further, the limiting groove is spaced apart from an edge of the second end in the first direction.

[0014] Further, the length of the limiting groove in the first direction is L1, the size of the screw in the first direction is L2, wherein 1 / 3L2≤L1≤2 / 3L2. Further, an anti-slip portion is provided on the outer peripheral wall of the gripping end.

[0015] The present invention also provides a method for implanting a ligament tissue fixation component, which is used for the above-mentioned ligament tissue fixation component, comprising the following steps:

[0016] S1 inserts the suspension piece into the through slot of the screw;

[0017] S2 folds the ligament in half and inserts it into the screw from the first end thereof, so that the suspension piece is located between the two sub-ligaments formed by the folded ligament, thereby suspending the folded part of the ligament on the suspension piece;

[0018] S3 sutures the free ends of the two sub-ligaments with sutures, and passes the sutures into the suspension loops, thereby completing the assembly of the ligament tissue fixation component;

[0019] S4 drilling a first bone tunnel matching the diameter of the ligament at one end of the joint to be reconstructed, and then drilling a first enlarged bone tunnel having a diameter larger than the ligament diameter and smaller than the outer diameter of the screw from the entrance end of the first bone tunnel;

[0020] S5: drilling a second bone tunnel that matches the size of the suspension loop at the other end of the joint to be reconstructed, and then drilling a second enlarged bone tunnel that matches the diameter of the ligament from the entrance end of the second bone tunnel;

[0021] S6 uses a guide needle to introduce the assembled ligament fixation component from the first enlarged bone tunnel into the first bone tunnel, and then introduces it into the second bone tunnel from the second enlarged bone tunnel, so that the suspension loop passes through the exit end of the second bone tunnel;

[0022] S7 uses a screwdriver to drive the screw into the bone tunnel;

[0023] S8 pulls the suspension loop, pulls the free ends of the two sub-ligaments into the second bone tunnel, adjusts the length of the suspension loop and tests the joint movement function to complete ligament fixation.

[0024] Furthermore, before the suspension piece is inserted into the channel of the screw, a bioactive material is injected into the interior of the suspension piece.

[0025] Compared with the prior art, the ligament tissue fixing assembly and the implantation method thereof according to the embodiment of the present invention have the following beneficial effects:

[0026] The ligament tissue fixation component and implantation method of the embodiment of the present invention, through the coordinated arrangement of the accommodating cavity and the suspension plate, allows the ligament to be safely accommodated inside the screw, reducing cutting damage and frictional pressure on the ligament tissue, and alleviating the occurrence of postoperative pain and functional disorders; at the same time, the limiting groove on the outer wall of the screw cooperates with the screwdriver to enhance the fixation effect of the ligament graft, reduce the risk of screw loosening, ensure the stability of the ligament during the healing process, and improve the success rate of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is an axonometric view of a ligament tissue fixation assembly according to an embodiment of the present invention;

[0028] Figure 2 is a front view of a ligament tissue fixation assembly according to an embodiment of the present invention;

[0029] Figure 3 is an axonometric view of a screw in a ligament tissue fixation assembly according to an embodiment of the present invention;

[0030] Figure 4 is a front view of a screw in a ligament tissue fixation assembly according to an embodiment of the present invention;

[0031] Figure 5 is a front view of a suspension piece in a ligament tissue fixation assembly according to an embodiment of the present invention;

[0032] Figure 6 is a top view of a suspension sheet in a ligament tissue fixation assembly according to an embodiment of the present invention;

[0033] Figure 7 is an axonometric view of a screwdriver in a ligament tissue fixation assembly according to an embodiment of the present invention;

[0034] Figure 8 is a front view of a screwdriver in a ligament tissue fixation assembly according to an embodiment of the present invention;

[0035] Fig. 9 It is a schematic diagram of the assembly of the ligament tissue fixation component in the implantation method according to an embodiment of the present invention.

[0036] In the figure, 1, screw; 10, accommodating cavity; 11, first end; 12, second end; 13, limiting groove; 14, through groove; 2, suspension piece; 21, accommodating channel; 3, screwdriver; 31, gripping end; 311, anti-slip part; 32, locking end; 321, limiting part; 4, ligament; 5, suspension loop;

[0037] x, first direction; y, second direction. DETAILED DESCRIPTION

[0038] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] In the description of the present invention, it should be understood that the terms "connected", "connected", "fixed" and the like used in the present invention should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a welding connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] The present invention uses the terms "first", "second", etc. to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0042] In the description of the present application, the first direction x and the second direction y are perpendicular or approximately perpendicular to each other.

[0043] Reference Figure 1 and Figure 2 A ligament tissue fixing assembly according to an embodiment of the present invention comprises:

[0044] A screw 1 has a first end 11 and a second end 12 arranged opposite to each other along a first direction x, the screw 1 is provided with a receiving cavity 10 penetrating the first end 11 and the second end 12 along the first direction x, the receiving cavity 10 is used to receive a ligament 4, the outer peripheral wall of the screw 1 is provided with threads, the outer peripheral wall of the screw 1 is provided with a limiting groove 13 extending along the edge of the first end 11 toward the second end 12, and the end surface of the first end 11 is provided with a through groove 14 extending along the second direction y, the through groove 14 is communicated with the receiving cavity 10. Part of the through groove 14 overlaps with the central axis of the screw 1; the limiting groove 13 is not provided with threads for the convenience of the operation of the screwdriver 3, and may be a smooth surface, or provided with other limiting portions 321 adapted to the screwdriver 3.

[0045] The suspension piece 2 is inserted into the through groove 14 and does not protrude from the outer peripheral wall of the screw 1 and the end face of the first end 11, that is, the size and shape of the suspension piece 2 are adapted to the size and shape of the through groove 14, so that the suspension piece 2 can play the role of suspending the ligament 4 and can be implanted into the bone canal along with the screw 1.

[0046] The screwdriver 3 comprises a gripping end 31 and a locking end 32 which are arranged opposite to each other along a first direction x; the locking end 32 is provided with a limiting portion 321 along the first direction x which is adapted to the shape of the limiting groove 13; specifically, the shape and the length of the limiting portion 321 in the first direction x are adapted to the shape and the length of the limiting groove 13 in the first direction x, so that the screwdriver 3 can play the role of locking the screw 1 and pushing the screw 1; the outer diameter of the locking end 32 of the screwdriver 3 is less than or equal to the outer diameter of the screw 1, so as to facilitate the screwdriver 3 to penetrate deep into the bone canal to tighten the screw 1 during surgery.

[0047] The present invention cooperates with the accommodating cavity 10 and the suspension plate 2 so that the ligament 4 can be folded and accommodated inside the screw 1, reducing cutting damage and friction pressure on the ligament 4 tissue, and alleviating the occurrence of postoperative pain and functional disorders; at the same time, the limiting groove 13 on the outer wall of the screw 1 cooperates with the screwdriver 3 to enhance the fixation effect of the ligament 4 transplant, reduce the risk of loosening of the screw 1, ensure the stability of the ligament 4 during the healing process, and improve the success rate of the operation.

[0048] Reference Figure 5 and Figure 6 In the prior art, since only a simple screw 1 is used, it often contains only a small amount of or even no bioactive material, and lacks the effect of promoting tissue regeneration and healing. Therefore, in some embodiments of the present application, the suspension sheet 2 is provided with a receiving channel 21 for receiving the bioactive material that passes through along the second direction y. When in use, the bioactive material is filled in the receiving channel 21 of the suspension sheet 2 to promote the regeneration and healing speed of human tissue.

[0049] Reference Figure 3 , Figure 4 and Figure 7 In some embodiments of the present application, at least two limiting grooves 13 are provided on the outer peripheral wall of the screw 1, and each limiting groove 13 is sequentially spaced along the circumference of the screw 1; the locking end 32 is provided with a number of limiting portions 321 equal to the number of the limiting grooves 13, and each limiting portion 321 is provided in a one-to-one correspondence with each limiting groove 13. The coordinated design of multiple limiting grooves 13 and multiple limiting portions 321 facilitates the operator to more intuitively align the screwdriver 3 with the screw 1 during the ligament 4 reconstruction surgery, thereby reducing errors and improving surgical efficiency.

[0050] In some embodiments of the present application, each of the limiting grooves 13 is evenly distributed along the circumference of the screw 1, that is, the spacing between two adjacent limiting grooves 13 is equal. Specifically, each of the limiting grooves 13 is evenly distributed along the circumference of the screw 1, so that the force points of the screw 1 can be evenly distributed when the force is applied, and it is convenient for the operator to more easily judge and adjust the position of the screw 1 during the operation. In a specific embodiment, two limiting grooves 13 are provided, which are arranged oppositely on the outer peripheral wall of the screw 1.

[0051] In some embodiments of the present application, the limiting groove 13 is staggered with the through groove 14. That is, the limiting groove 13 and the through groove 14 are staggered with each other, which reduces the interference between the screwdriver 3 and the suspension piece 2 installed in the through groove 14 during the tightening process, thereby reducing the risk of friction or damage.

[0052] In some embodiments of the present application, the limiting groove 13 is spaced apart from the edge of the second end 12 in the first direction x, ensuring that the screw 1 forms a complete thread circle in the circumferential direction, thereby improving the stability of its connection with the bone tunnel.

[0053] In some embodiments of the present application, the length of the limiting groove 13 in the first direction x is L1, and the size of the screw 1 in the first direction x is L2, wherein 1 / 3L2≤L1≤2 / 3L2, thereby ensuring the length of the complete thread circle of the screw 1 in the circumferential direction and the length of the force position when the screw 1 is tightened, thereby improving the connection stability.

[0054] Reference Figure 8 In some embodiments of the present application, an anti-slip portion 311 is provided on the outer peripheral wall of the gripping end 31 to facilitate the operator to use the screwdriver 3.

[0055] Referring to FIG. 9 , the present invention further provides a method for implanting a ligament tissue fixation assembly, which is used for the above-mentioned ligament tissue fixation assembly, comprising the following steps:

[0056] S1 inserts the suspension plate 2 into the through slot 14 of the screw 1;

[0057] S2 folds the ligament 4 in half and inserts it into the screw 1 from the first end 11 of the screw 1, so that the suspension piece 2 is located between the two sub-ligaments 4 formed by the folded ligament 4, thereby suspending the folded part of the ligament 4 on the suspension piece 2;

[0058] S3 sew up the free ends of the two sub-ligaments 4 with sutures, and pass the sutures into the suspension loops 5, thereby completing the assembly of the ligament tissue fixation assembly;

[0059] S4 drills a first bone tunnel matching the diameter of the ligament 4 at one end of the joint to be reconstructed by the ligament 4, and then drills a first enlarged bone tunnel having a diameter larger than the diameter of the ligament 4 and smaller than the outer diameter of the screw 1 from the entrance end of the first bone tunnel;

[0060] S5 drills a second bone tunnel that matches the size of the suspension loop 5 at the other end of the joint where the ligament 4 is to be reconstructed, and then drills a second enlarged bone channel that matches the diameter of the ligament 4 from the entrance end of the second bone tunnel; the depth of the second enlarged bone channel is greater than the depth that the ligament 4 needs to be inserted.

[0061] S6 uses a guide needle to introduce the assembled ligament 4 fixation component from the first enlarged bone tunnel into the first bone tunnel, and then introduces it into the second bone tunnel from the second enlarged bone tunnel, so that the suspension loop 5 passes through the exit end of the second bone tunnel;

[0062] S7 uses screwdriver 3 to screw screw 1 into the bone tunnel, and maintains moderate tension on the ligament tissue fixation component throughout the process;

[0063] S8 pulls the suspension loop 5, pulls the free ends of the two sub-ligaments 4 into the second bone tunnel, adjusts the length of the suspension loop 5 and tests the joint movement function, and completes the fixation of the ligament 4.

[0064] In some embodiments of the present application, before the suspension piece 2 is inserted into the channel of the screw 1 , a bioactive material is injected into the interior of the suspension piece 2 to promote the regeneration and healing speed of the tissue.

[0065] In the specific implementation of this application, the specific implantation operation method of the ligament tissue fixation component is as follows:

[0066] 1) Inject bioactive bone cement into the receiving channel 21 of the suspension plate 2, and after the cement solidifies, assemble the ligament tissue fixing assembly with the ligament 4, as shown in FIG. Fig. 9 shown.

[0067] 2) First, a bone drill with a diameter matching the diameter of the ligament 4 is used to drill a first bone tunnel at the distal end of the tibia, and then a bone drill with a diameter larger than the diameter of the ligament 4 and slightly smaller than the diameter of the screw 1 is used to drill a first enlarged bone tunnel from the entrance with a depth equal to the length of the screw 1;

[0068] 3) First, a bone drill with a diameter matching the width of the suspension loop 5 is used to drill a second bone tunnel in the intercondylar notch at the distal end of the femur, and then a bone drill with a diameter matching the diameter of the ligament 4 is used to drill an enlarged bone tunnel with a depth slightly longer than that of the second bone tunnel implanted at the end of the ligament 4B;

[0069] 4) Use a guide needle to introduce the B end of the assembled ligament 4 from the first enlarged bone tunnel where the screw 1 is to be installed into the first bone tunnel, and then pass through the second enlarged bone tunnel and the second bone tunnel in sequence to exit from the exit of the suspension loop 5 at the other end of the joint;

[0070] 5) Use screwdriver 3 to screw screw 1 into the first enlarged bone tunnel, maintaining appropriate tension throughout the process;

[0071] 6) Pull the sling loop 5 to pull the end of the ligament 4B into the second bone tunnel, adjust the length of the sling loop 5 and test the joint movement to complete the fixation.

[0072] In summary, an embodiment of the present invention provides a ligament tissue fixation component and an implantation method thereof, which enables the ligament 4 to be safely accommodated inside the screw 1 through the coordinated arrangement of the accommodating cavity 10 and the suspension plate 2, thereby reducing the cutting damage and frictional pressure on the ligament 4 tissue, and alleviating the occurrence of postoperative pain and functional disorders; at the same time, the limiting groove 13 on the outer wall of the screw 1 cooperates with the screwdriver 3 to enhance the fixation effect of the ligament 4 transplant, reduce the risk of loosening of the screw 1, and ensure the stability of the ligament 4 during the healing process; in addition, by opening a accommodating channel 21 in the suspension plate 2, bioactive materials are injected to promote tissue regeneration and healing speed, thereby improving the success rate of the operation.

[0073] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A ligament tissue fixation assembly, characterized in that: include: A screw having a first end and a second end arranged opposite to each other in a first direction, the screw being provided with a receiving cavity penetrating through the first end and the second end in the first direction, the receiving cavity being used to receive a ligament, the outer peripheral wall of the screw being provided with a thread, the outer peripheral wall of the screw being provided with a limiting groove extending along an edge of the first end toward the second end, a through groove extending in the second direction being provided on an end surface of the first end, the through groove being communicated with the receiving cavity; A suspension piece, which is inserted into the through slot and does not protrude from the outer peripheral wall of the screw and the end surface of the first end; A screwdriver, comprising a gripping end and a locking end arranged opposite to each other along a first direction, wherein the locking end is provided with a limiting portion protruding along the first direction and matching the shape of the limiting groove; The first direction and the second direction are perpendicular to each other.

2. The ligament tissue fixation assembly according to claim 1, characterized in that: The suspension sheet is provided with a receiving channel penetrating along the second direction for receiving the bioactive material.

3. The ligament tissue fixation assembly according to claim 1, characterized in that: At least two limiting grooves are provided on the outer peripheral wall of the screw, and the limiting grooves are arranged in sequence and spaced apart along the circumference of the screw; the locking end is provided with limiting parts whose number is equal to the limiting grooves, and each limiting part is arranged in one-to-one correspondence with each limiting groove.

4. The ligament tissue fixation assembly according to claim 3, characterized in that: The limiting grooves are evenly distributed along the circumference of the screw.

5. The ligament tissue fixation assembly according to claim 1, characterized in that: The limiting groove and the through groove are arranged in a staggered manner.

6. The ligament tissue fixation assembly according to claim 1, characterized in that: The limiting groove is spaced apart from an edge of the second end in the first direction.

7. The ligament tissue fixation assembly according to claim 6, characterized in that: The dimension of the limiting groove in the first direction is L1, and the dimension of the screw in the first direction is L2, wherein 1 / 3L2≤L1≤2 / 3L2.

8. The ligament tissue fixation assembly according to claim 1, characterized in that: An anti-slip portion is provided on the outer peripheral wall of the gripping end.

9. A method for implanting a ligament tissue fixation assembly, used for the ligament tissue fixation assembly as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S1 inserts the suspension piece into the through slot of the screw; S2 folds the ligament in half and inserts it into the screw from the first end thereof, so that the suspension piece is located between the two sub-ligaments formed by the folded ligament, thereby suspending the folded part of the ligament on the suspension piece; S3 sutures the free ends of the two sub-ligaments with sutures, and passes the sutures into the suspension loops, thereby completing the assembly of the ligament tissue fixation component; S4 drilling a first bone tunnel matching the diameter of the ligament at one end of the joint to be reconstructed, and then drilling a first enlarged bone tunnel having a diameter larger than the ligament diameter and smaller than the outer diameter of the screw from the entrance end of the first bone tunnel; S5: drilling a second bone tunnel that matches the size of the suspension loop at the other end of the joint to be reconstructed, and then drilling a second enlarged bone tunnel that matches the diameter of the ligament from the entrance end of the second bone tunnel; S6 uses a guide needle to introduce the assembled ligament fixation component from the first enlarged bone tunnel into the first bone tunnel, and then introduces it into the second bone tunnel from the second enlarged bone tunnel, so that the suspension loop passes through the exit end of the second bone tunnel; S7 uses a screwdriver to drive the screw into the bone tunnel; S8 pulls the suspension loop, pulls the free ends of the two sub-ligaments into the second bone tunnel, adjusts the length of the suspension loop and tests the joint movement function to complete ligament fixation.

10. The method for implanting a ligament tissue fixation assembly as claimed in claim 9, characterized in that: A bioactive material is injected into the interior of the suspension piece before it is inserted into the channel of the screw.

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