Knotless fixation nail for rotator cuff tear

Abstract

This application relates to the field of sports medicine, and particularly to a knotless fixation nail for rotator cuff tears, including a humeral screw for being driven into the humerus during surgery; a rotator cuff screw for being fixed at the rotator cuff during surgery; a connecting piece including a humeral screw fixing part, a rotator cuff screw fixing part, and a connecting part, the connecting piece being located between the humeral screw fixing part and the rotator cuff screw fixing part, and the humeral screw fixing part, the rotator cuff screw fixing part, and the connecting part being integrally formed, with a plurality of convex structures provided on the humeral fixing part; a rotator cuff fixing piece provided between the head of the rotator cuff screw and the rotator cuff screw fixing part for assisting in fixing the rotator cuff to prevent tendon slippage. This application has the effect of reducing the recurrence probability of patients.

Description

Technical Field

[0001] This application relates to the field of sports medicine, and in particular, to a knotless fixation nail for rotator cuff tear. Background Art

[0002] The rotator cuff is composed of the intrinsic muscles of the shoulder joint, namely the supraspinatus and infraspinatus muscles, the teres minor muscle, and the subscapularis tendon. It is closely connected to the joint capsule and attached to the upper end of the humerus, shaped like a sleeve, so it is called the rotator cuff. Rotator cuff injury refers to the injury of the rotator cuff and its adjacent tissues. Since the shoulder joint is the joint with the strongest mobility in the human body. The strong mobility causes some people to be troubled by rotator cuff tears. Rotator cuff tears may be caused by accidents, but in most cases, they are caused by degeneration related to the aging process, that is, the loss of cartilage substances and the separation of tendons and bones. In addition to complete rotator cuff tears (i.e., complete separation of the tendon and bone), there are also quite a number of patients who only have partial tears (lesions). Rotator cuff repair surgery is used to treat rotator cuff injuries.

[0003] Currently, for the above-mentioned complete and partial tear situations, in most cases, the method of placing anchor nails is used for treatment. During the operation, the distance between two anchor nails should be about 8 mm. Single-row fixation or double-row fixation can be performed. Then, the suture is passed through the rotator cuff tendon, and the rotator cuff tendon is fixed to the greater tubercle of the humerus. After moving the shoulder joint to confirm no impingement, the surgical incision is closed.

[0004] Regarding the above related technologies, the inventor believes that the current surgical process using anchor nails and sutures is relatively complex, and using anchor nails and sutures has the defect of easily causing recurrence in patients with tendon contraction. Summary of the Invention

[0005] In order to reduce the recurrence probability of patients, this application provides a knotless fixation nail for rotator cuff tear.

[0006] A knotless fixation nail for rotator cuff tear provided by this application adopts the following technical solutions:

[0007] A knotless fixation nail for rotator cuff tear, comprising:

[0008] A humeral screw, which is used to be driven into the humerus during the operation;

[0009] A rotator cuff screw, which is used to be fixed at the rotator cuff during the operation;

[0010] A connecting piece, including a humeral screw fixing part, a rotator cuff screw fixing part, and a connecting part. The connecting piece is located between the humeral screw fixing part and the rotator cuff screw fixing part, and the humeral screw fixing part, the rotator cuff screw fixing part, and the connecting part are integrally formed. A plurality of convex structures are provided on the humeral fixing part;

[0011] A rotator cuff fixing member is disposed between the head of the rotator cuff screw and the rotator cuff screw fixing portion, and is used for assisting in fixing the rotator cuff to prevent tendon slippage.

[0012] By adopting the above technical solution, during the use of the knotless fixing nail for rotator cuff tear, first use a bone drill to open a hole at the place where the rotator cuff screw needs to be installed, then use pliers to pull the tendon to the designated position, and then pass the humeral screw through the humeral fixing portion and rotate until the head of the humeral screw contacts the convex structure. When a friction sound is emitted between the head of the humeral screw and the convex structure, it can be proved that the humeral screw has been rotated to the appropriate position. At this time, the multiple convex structures and the head of the humeral screw are in a fixed state; pass the rotator cuff screw through the rotator cuff fixing member and the rotator cuff fixing portion in sequence, and then fix the rotator cuff screw. At this time, the rotator cuff fixing member fixes the tendon, achieving a good connection and fixing effect. The combined use does not require knotting, and only needs to be screwed and locked, reducing tendon contraction, with simple operation, high surgical success rate, low postoperative recurrence rate, and shortened surgical time.

[0013] Preferably, the humeral screw fixing portion is a circular structure, and multiple convex structures are arranged centered on the center of the humeral screw fixing portion. The convex structures are radially arranged relative to the center of the humeral screw fixing portion, and multiple groove structures are correspondingly arranged at one end of the head of the humeral screw close to the convex structure.

[0014] By adopting the above technical solution, when the humeral screw is rotated to the appropriate position, friction occurs between the head of the humeral screw and the convex structure, and the position can be judged according to the sound. When the rotation of the humeral screw stops, the convex structure is located in the groove structure to limit the rotation of the humeral screw.

[0015] Preferably, the convex structure includes a limiting portion and a sliding portion. The included angle of the limiting portion relative to the humeral screw fixing portion is close to perpendicular or perpendicular, and the sliding portion is an arc surface structure.

[0016] By adopting the above technical solution, the limiting portion limits the rotation of the humeral screw, so that the humeral screw can only rotate in the direction of the limiting portion. If the humeral screw rotates in the direction away from the limiting portion, the limiting portion makes the humeral screw unable to rotate, fixing and locking the position of the humeral screw. There is no need to knot, the operation is simple, the surgical time is shortened, the surgical success rate can be improved, and the postoperative recurrence rate can be reduced.

[0017] Preferably, the rotator cuff fixing member includes a rotator cuff fixing plate and multiple barbs arranged on the rotator cuff fixing plate. An installation hole for passing and installing the rotator cuff screw is opened on the rotator cuff fixing plate, and the tips of the barbs are arranged on the side away from the rotator cuff fixing plate.

[0018] By adopting the above technical solution, the barbs are used to insert into the tendon to increase friction and prevent displacement.

[0019] Preferably, multiple groups of barbs are provided, the center line connection of each group of barbs is arc-shaped, and multiple groups of barbs are symmetrically arranged about the center of the rotator cuff fixing plate.

[0020] By adopting the above technical solution, such an arrangement can increase the stability of the force when the barbs are inserted into the tendon, making the fixation more stable and avoiding displacement.

[0021] Preferably, the length of the barbs near the edge of the rotator cuff fixing plate is greater than or equal to that of the barbs near the mounting hole; a mounting hole is provided at the center of the rotator cuff screw fixing part, and a plurality of through holes for the barbs to penetrate are provided at the positions corresponding to the barbs on the rotator cuff fixing part.

[0022] By adopting the above technical solution, during installation, the rotator cuff screw passes through the mounting hole and extends into the rotator cuff for fixation, and the barbs are fixed by inserting into the rotator cuff, avoiding displacement.

[0023] Preferably, a plurality of auxiliary screw fixing holes are correspondingly provided at the positions of the rotator cuff fixing plate and the rotator cuff screw fixing part near the mounting hole.

[0024] By adopting the above technical solution, when the rotator cuff still cannot be stably fixed by the dual action of the rotator cuff screw and the barbs, an auxiliary screw is added into the auxiliary screw fixing hole to meet the fixation requirement, increase the success rate of the operation, and reduce the possibility of recurrence of the patient.

[0025] Preferably, a plurality of small holes are provided on the rotator cuff screw fixing part, and the plurality of small holes are distributed among the auxiliary screw fixing holes, the mounting hole and the through holes.

[0026] By adopting the above technical solution, the plurality of distributed small holes can reduce the contact area between the connecting piece and the tendon, avoiding tendon contraction.

[0027] Preferably, the small holes are divided into multiple groups, the centers of each group of small holes are arc-shaped, and the centers of the arc-shaped arrangements of each group of small holes are arranged around the mounting hole.

[0028] By adopting the above technical solution, the uniform arc-shaped arrangement of the multiple small holes is more convenient for the tendon to recover, avoiding tendon contraction.

[0029] Preferably, the connecting part is in a plate-like structure, the parts of the connecting piece connected to the humeral screw fixing part and the rotator cuff screw fixing part have the largest width, and the width of the connecting piece at the midline position between the humeral screw fixing part and the rotator cuff screw fixing part is the smallest.

[0030] By adopting the above technical solution, the excessive setting of the connecting part can increase the toughness of the connecting piece, extend the service life of the connecting piece, and at the same time avoid the possibility of knotting failure of the rope, which is convenient and fast.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] 1. During the use of the knotless fixation nail for rotator cuff tear, first drill a hole with a bone drill at the place where the rotator cuff screw needs to be installed, then use pliers to pull the tendon to the designated position, and then pass the humeral screw through the humeral fixation part and rotate until the head of the humeral screw contacts the convex structure. When a friction sound is emitted between the head of the humeral screw and the convex structure, it can be proved that the humeral screw has been rotated to the appropriate position. At this time, the multiple convex structures and the head of the humeral screw are in a fixed state; pass the rotator cuff screw through the rotator cuff fixing piece and the rotator cuff fixing part in sequence, and then fix the rotator cuff screw. At this time, the rotator cuff fixing piece fixes the tendon, achieving a good connection and fixing effect. The combined use does not require knotting, and only needs to be screwed and locked, reducing tendon contraction, with simple operation, high surgical success rate, low postoperative recurrence rate, and shortened surgical time.

[0033] 2. When the humeral screw is rotated to the appropriate position, friction occurs between the head of the humeral screw and the convex structure, and the position can be judged according to the sound. When the rotation of the humeral screw stops, the convex structure is located in the groove structure to limit the rotation of the humeral screw.

[0034] 3. The barbs are used to insert into the tendon to increase the friction and prevent displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic diagram of the overall structure of a knotless fixation nail for rotator cuff tear in an embodiment of the present application;

[0036] Figure 2 is a schematic diagram showing the structure of the connecting piece and the head of the humeral screw;

[0037] Figure 3 is a schematic diagram showing the structure when using one humeral screw and two connecting pieces;

[0038] Figure 4 is a schematic diagram showing the structure of the connecting piece;

[0039] Figure 5 is a schematic diagram showing the structure of the rotator cuff fixing piece.

[0040] Description of reference numerals: 1. Humeral screw; 11. Groove structure; 2. Rotator cuff screw; 3. Connecting piece; 31. Humeral screw fixing part; 32. Rotator cuff screw fixing part; 321. Auxiliary screw fixing hole; 322. Small hole; 323. Through hole; 33. Connecting part; 34. Mounting hole; 35. Protrusion structure; 351. Limiting part; 352. Sliding part; 36. First fixing part; 37. Second fixing part; 4. Rotator cuff fixing piece; 41. Rotator cuff fixing plate; 42. Barbs. Detailed implementation manners

[0041] The following further elaborates on this application Figures 1-5 in conjunction with the attached drawings.

[0042] The embodiment of this application discloses a knotless fixing nail for rotator cuff tear. Referring to Figure 1 , the knotless fixing nail for rotator cuff tear includes a humeral screw 1 acting on the humerus during surgery, a rotator cuff screw 2 for fixing on the rotator cuff, a connecting piece 3 connecting the humeral screw 1 and the rotator cuff screw 2, and a rotator cuff fixing piece 4 for fixing the rotator cuff.

[0043] The structures of the humeral screw 1 and the rotator cuff screw 2 can be the same or different, as long as the fixing requirements are met. Optionally, the humeral screw 1 and / or the rotator cuff screw 2 is a hollow screw; optionally, the humeral screw 1 and / or the rotator cuff screw 2 is a solid screw; optionally, the size of one side of the humeral screw 1 and / or the rotator cuff screw 2 close to the nail head is larger than the size of the side of the humeral screw 1 and / or the rotator cuff screw 2 far from the nail head. In different embodiments, the length dimensions of the humeral screw 1 and the rotator cuff screw 2 are the same or different. Optionally, the length of the humeral screw 1 is the same as the length of the rotator cuff screw 2; optionally, the length of the humeral screw 1 is greater than the length of the rotator cuff screw 2; optionally, the length of the rotator cuff screw 2 is greater than the length of the humeral screw 1.

[0044] In different embodiments, the diameter dimensions of the humeral screw 1 and the rotator cuff screw 2 are the same or different. Optionally, the diameter of the humeral screw 1 is the same as the diameter dimension of the rotator cuff screw 2; optionally, the diameter of the humeral screw 1 is greater than the diameter dimension of the rotator cuff screw 2; optionally, the diameter dimension of the humeral screw 1 is less than the diameter dimension of the rotator cuff screw 2; optionally, the nail head size of the humeral screw 1 is the same as the nail head size of the rotator cuff screw 2; optionally, the nail head size of the humeral screw 1 is greater than the nail head size of the rotator cuff screw 2; optionally, the nail head size of the humeral screw 1 is less than the nail head size of the rotator cuff screw 2. In this embodiment, the case where both the diameter and length of the humeral screw 1 are smaller than those of the rotator cuff screw 2 is taken as an example for illustration.

[0045] The connecting member 3 includes a humeral screw fixing portion 31, a rotator cuff screw fixing portion 32, and a connecting portion 33 connecting the humeral screw fixing portion 31 and the rotator cuff screw fixing portion 32. The structures of the humeral screw fixing portion 31 and the rotator cuff screw fixing portion 32 may be the same or different. In this embodiment, the case where the structures of the humeral screw fixing portion 31 and the rotator cuff screw fixing portion 32 are the same is described. Both the humeral screw fixing portion 31 and the rotator cuff screw fixing portion 32 are circular disks, and mounting holes 34 are respectively formed at the centers of the humeral fixing portion and the rotator cuff screw fixing portion 32 for passing through and mounting the humeral screw 1 and the rotator cuff screw 2. When a humeral screw 1 is used corresponding to a humeral screw fixing portion 31, convex structures 35 are provided on both surfaces of the humeral screw fixing portion 31 corresponding to the two sides of the head of the humeral screw 1, and a groove structure 11 is provided on the head of the humeral screw 1 corresponding to the convex structure 35.

[0046] A plurality of convex structures 35 are provided, and the plurality of convex structures 35 are radially arranged with the center of the humeral screw fixing portion 31 as the center. Optionally, the plurality of convex structures 35 are evenly arranged, and the distance between every two adjacent convex structures 35 is the same. One side of the convex structure 35 is a limiting portion 351, and one side is a sliding portion 352. In a more preferred embodiment, the limiting portions 351 of the plurality of convex structures 35 all face the same screw rotation direction. The angle of the limiting portion 351 relative to the humeral screw fixing portion 31 is close to perpendicular or perpendicular. Optionally, the limiting portion 351 of the convex structure 35 can be a vertical plane perpendicular to the humeral screw fixing portion 31, and the sliding portion 352 is an arc structure. Optionally, a chamfer structure is provided between the limiting portion 351 and the sliding portion 352.

[0047] When the humeral screw 1 is fixed, when it is rotated to a certain depth, the head of the humeral screw 1 contacts the convex structure 35. When a friction sound is generated between the head of the humeral screw 1 and the convex structure 35, it can be proved that the humeral screw 1 has been rotated to the appropriate position. At this time, the plurality of convex structures 35 are located in the groove structure 11 of the head of the humeral screw 1, and the limiting portion 351 limits the rotation of the humeral screw 1, so that the humeral screw 1 can only rotate in the direction of the limiting portion 351. If the humeral screw 1 rotates in the direction away from the limiting portion 351, the limiting portion 351 makes the humeral screw 1 unable to rotate, fixes and locks the position of the humeral screw 1, without knotting, the operation is simple, the operation time is shortened, and the success rate of the operation can be improved, and the recurrence rate after the operation can be reduced.

[0048] When a humeral screw 1 is used corresponding to two humeral screw fixing parts 31, the two humeral screw fixing parts 31 include a first fixing part 36 and a second fixing part 37, and the surface where the first fixing part 36 and the second fixing part 37 are in contact is a smooth plane. Optionally, the surface of the first fixing part 36 away from the second fixing part 37 is arranged close to the head of the humeral screw 1. At this time, a plurality of convex structures 35 are arranged on the surface of the first fixing part 36 close to the head of the humeral screw 1. Optionally, the plurality of convex structures 35 are evenly arranged. A plurality of convex structures 35 are arranged on the surface of the second fixing part 37 away from the first fixing part 36. Optionally, the plurality of convex structures 35 are evenly arranged.

[0049] Optionally, the surface of the second fixing part 37 away from the first fixing part 36 is arranged close to the head of the humeral screw 1. At this time, a plurality of convex structures 35 are arranged on the surface of the second fixing part 37 close to the head of the humeral screw 1. Optionally, the plurality of convex structures 35 are evenly arranged. A plurality of convex structures 35 are arranged on the surface of the first fixing part 36 away from the second fixing part 37. Optionally, the plurality of convex structures 35 are evenly arranged. The convex structures 35 close to the humeral screw 1 mainly limit the rotation of the humeral screw 1, and the function of the convex structures 35 close to the humerus is to increase the friction force, strengthen the fixing structure, and reduce the postoperative recurrence rate. The specific shape and structure of the convex structures 35 refer to the above part and will not be elaborated here.

[0050] A plurality of auxiliary screw fixing holes 321 are also formed in the rotator cuff fixing part. Optionally, the plurality of auxiliary screw fixing holes 321 are evenly arranged on the rotator cuff fixing part. Preferably, the distance between the centers of every two adjacent auxiliary screw fixing holes 321 is the same, and the distance between the centers of every two opposite auxiliary screw fixing holes 321 is the same. In this embodiment, four auxiliary screw fixing holes 321 are taken as an example for illustration, and the intersection of the connection lines between two opposite auxiliary screw fixing holes 321 coincides with the center of the rotator cuff fixing part. A number of irregularly distributed small holes 322 are also formed in the rotator cuff fixing part. The small holes 322 are used to reduce the contact area between the rotator cuff fixing part and the tendon, effectively avoid the atrophy of the tendon, facilitate tissue growth, and accelerate the repair. In a more preferred embodiment, a number of small holes 322 are provided with different diameter sizes according to their positions; in a more preferred embodiment, a number of small holes 322 are divided into multiple groups, and the centers of each group of small holes 322 are arranged in an arc, and the centers of the arcs of each group of small holes 322 are all arranged around the mounting hole 34.

[0051] The rotator cuff fixing member 4 includes a rotator cuff fixing plate 41 and a plurality of barbs 42 integrally formed with the rotator cuff fixing plate 41. The rotator cuff fixing plate 41 is a circular plate-like structure having the same size as the rotator cuff fixing portion, and a mounting hole 34 having the same size as the mounting hole 34 on the rotator cuff fixing portion is provided at the center of the circle of the rotator cuff fixing plate 41. The rotator cuff fixing plate 41 is also provided with an auxiliary screw fixing hole 321 corresponding to the auxiliary screw fixing hole 321 on the rotator cuff fixing portion and having the same size. The plurality of barbs 42 are provided on one side of the rotator cuff fixing member 4 away from the head of the rotator cuff fixing screw. Optionally, the barb 42 is a tapered barb 42, and the tip of the barb 42 is arranged toward the side away from the rotator cuff fixing plate 41. The function of the barb 42 is to increase the friction force and prevent displacement. A plurality of through holes 323 for the barbs 42 to penetrate are provided on the rotator cuff fixing portion corresponding to the plurality of groups of barbs 42, so that the barbs 42 can penetrate into the tendon for fixation. Optionally, the plurality of barbs 42 are divided into multiple groups, and each group of barbs 42 is symmetrically arranged about the center of the mounting hole 34, and the connecting direction of the centers of each group of barbs 42 is an arc.

[0052] In this embodiment, two groups of barbs 42 are taken as an example for illustration. Each group of barbs 42 is provided with four barbs. The two groups of barbs 42 are symmetrically arranged about the center of the mounting hole 34. In an alternative embodiment, the length of each barb 42 in each group is the same; in another alternative embodiment, the lengths of the two barbs 42 near the edge of the rotator cuff fixing plate 41 in each group of barbs 42 are greater than the lengths of the two barbs 42 near the mounting hole 34. When the length of the barb 42 near the edge of the inspection road fixing plate is greater than the lengths of the two barbs 42 near the mounting hole 34, the friction force between this part and the tendon can be increased, and the success rate of the operation can be improved.

[0053] The connecting member 3 is a plate-like structure for connecting the humerus screw fixing portion 31 and the rotator cuff screw fixing portion 32. In an alternative embodiment, the connecting member 3 is a rectangular parallelepiped plate, and the connecting member 3 is integrally formed with the humerus screw fixing portion 31 and the rotator cuff screw fixing portion 32; in a preferred embodiment, the connecting member 3 is arc-shaped near the humerus screw fixing portion 31 and the rotator cuff screw fixing portion 32. When the arc-shaped treatment is performed, the width of the connection between the connecting member 3 and the humerus screw fixing portion 31 and the rotator cuff screw fixing portion 32 is the largest, and the width of the connecting member 3 located at the midline between the humerus screw fixing portion 31 and the rotator cuff screw fixing portion 32 is the smallest. The setting of the connecting member 3 can reduce tendon contraction, eliminate the need for tying knots, is simple to operate, can be used in combination, has a high success rate, a low postoperative recurrence rate, and shortens the operation time.

[0054] The implementation principle of the embodiments of this application is as follows: During the use of the knotless fixation nail for rotator cuff tear, the humeral screw 1 passes through the mounting hole 34 of the humeral fixation part and is rotated until the head of the humeral screw 1 contacts the convex structure 35. When a friction sound is emitted between the head of the humeral screw 1 and the convex structure 35, it can prove that the humeral screw 1 has been rotated to the appropriate position. At this time, multiple convex structures 35 are located in the groove structure 11 of the head of the humeral screw 1, and the limiting part 351 limits the rotation of the humeral screw 1; the rotator cuff screw 2 is sequentially passed through the rotator cuff fixing plate 41 and the rotator cuff fixing part, and then the rotator cuff screw 2 is fixed. At this time, multiple barbs 42 fix the tendon, achieving a good connection and fixation effect. The combined use does not require knotting, reduces tendon contraction, has simple operation, high surgical success rate, low postoperative recurrence rate, and shortens the operation time.

[0055] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A knotless fixing nail for rotator cuff tear, characterized in that, it includes: a humeral screw (1) for being driven into the humerus during the operation; a rotator cuff screw (2) for being fixed at the rotator cuff during the operation; a connecting member (3), including a humeral screw fixing portion (31), a rotator cuff screw fixing portion (32), and a connecting portion (33), the connecting portion (33) is located between the humeral screw fixing portion (31) and the rotator cuff screw fixing portion (32), and the humeral screw fixing portion (31), the rotator cuff screw fixing portion (32), and the connecting portion (33) are integrally formed, and a plurality of convex structures (35) are provided on the humeral screw fixing portion (31); a rotator cuff fixing member (4) is arranged between the head of the rotator cuff screw (2) and the rotator cuff screw fixing portion (32) for assisting in fixing the rotator cuff to prevent tendon slippage; the humeral screw fixing portion (31) is a circular structure, and a plurality of the convex structures (35) are arranged centered on the center of the humeral screw fixing portion (31), and the convex structures (35) are radially arranged with respect to the center of the humeral screw fixing portion (31), and a plurality of groove structures (11) are correspondingly arranged at one end of the head of the humeral screw (1) close to the convex structures (35); the convex structure (35) includes a limiting portion (351) and a sliding portion (352), the included angle of the limiting portion (351) with respect to the humeral screw fixing portion (31) is close to perpendicular or perpendicular, and the sliding portion (352) is an arc surface structure; the limiting portions (351) of a plurality of convex structures (35) all face the same screw rotation direction; the connecting portion (33) is a plate-like structure, the part of the connecting member (3) connected to the humeral screw fixing portion (31) and the part of the connecting member (3) connected to the rotator cuff screw fixing portion (32) have the largest width, and the width of the connecting member (3) at the midline position between the humeral screw fixing portion (31) and the rotator cuff screw fixing portion (32) is the smallest; the rotator cuff fixing member (4) includes a rotator cuff fixing plate (41) and a plurality of barbs (42) arranged on the rotator cuff fixing plate (41), a first mounting hole for the rotator cuff screw (2) to pass through and be installed is provided on the rotator cuff fixing plate (41), and the tips of the barbs (42) are arranged on the side away from the rotator cuff fixing plate (41); the barbs (42) are provided in multiple groups, the center connection lines of each group of barbs (42) are all arc-shaped, and multiple groups of barbs (42) are centrosymmetrically arranged centered on the center of the rotator cuff fixing plate (41).

2. The knotless fixing nail for rotator cuff tear according to claim 1, characterized in that: the length of the barb (42) near the edge of the rotator cuff fixing plate (41) is greater than or equal to that of the barb (42) near the first mounting hole; a second mounting hole is opened at the center of the rotator cuff screw fixing portion (32), and a plurality of through holes (323) for the barbs (42) to pass through are opened at the position of the rotator cuff screw fixing portion (32) corresponding to the barbs (42).

3. The knotless fixing nail for rotator cuff tear according to claim 2, characterized in that: a plurality of first auxiliary screw fixing holes are correspondingly formed in the rotator cuff fixing plate (41) near the first mounting hole, and a plurality of second auxiliary screw fixing holes are correspondingly formed in the rotator cuff screw fixing portion (32) near the second mounting hole.

4. The knotless fixing nail for rotator cuff tear according to claim 3, characterized in that: a plurality of small holes (322) are formed in the rotator cuff screw fixing portion (32), and the plurality of small holes (322) are distributed between the second auxiliary screw fixing hole, the second mounting hole and the through hole (323).

5. The knotless fixing nail for rotator cuff tear according to claim 4, characterized in that: the small holes (322) are divided into multiple groups, the centers of the small holes (322) in each group are arranged in an arc shape, and the centers of the arc-shaped small holes (322) in each group are arranged around the second mounting hole.

Images