Fixing plate for rotator cuff injury

Abstract

The utility model discloses a rotator cuff injury fixing plate, which belongs to the technical field of sports medicine, and comprises a plate body, the plate body comprises a tendon fixing part close to the rotator cuff side, a humerus fixing part far away from the rotator cuff side and lower than the tendon fixing part, and a connecting part for connecting the tendon fixing part and the humerus fixing part, wherein inverted teeth which are used for fixing the tendon but not inserted into the humerus are arranged on the back face of the tendon fixing part, a first screw hole is formed in the tendon fixing part, a first screw can be inserted into the first screw hole to penetrate through the tendon to be fixed to the humerus, and a second screw hole is formed in the humerus fixing part, and a second screw can be inserted into the second screw hole to be directly fixed to the humerus. The screw bodies of the first screw and the second screw are covered with main threads, secondary threads are arranged between the main threads, and the diameter of the secondary threads is smaller than that of the main threads. The rotator cuff injury fixing plate does not need to be sutured and knotted, the surgical operation is simple, and the healing effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of sports medicine, in particular to a rotator cuff injury fixing plate. Background Art

[0002] The shoulder joint is the joint with the highest range of motion and frequency of movement in the human body. Therefore, it is easy to be injured during exercise, causing pain and dysfunction. The main cause of shoulder pain and dysfunction is rotator cuff injury. Most of the rotator cuffs are torn from the attachment point of the humeral head. The tearing and pain of the rotator cuff are closely related to the long-term friction between the acromion and the humeral head. Patients with obvious friction often have bone spurs under the humeral head and acromion. The hyperplastic bone spurs lead to a narrow space for the rotator cuff to move. The narrow space further aggravates the wear and degeneration of the rotator cuff. The two are in a vicious cycle, and the shoulder pain and mobility disorders are aggravated.

[0003] In the clinical treatment of rotator cuff injuries, the use of anchors with wires under arthroscopy is widely used. The soft tissue is fixed to the bone through sutures and its position is maintained without loosening or excessive tension until physiological healing is completed. At present, many related technologies have been disclosed, such as the invention patent application CN110507378A discloses a medical anchor, the utility model patent CN216439247U discloses an elastic expansion sleeve suture anchor for orthopedic surgery in the elderly, and the utility model patent CN215306235U discloses a rotator cuff suture device.

[0004] However, tendon suturing is a relatively complex and delicate operation. The operation involves multiple steps such as threading and knot pushing, which is very complicated, and the knots left in the body will affect the patient's prognosis. Although knotless anchors were introduced later, the sutures are pressed with the anchor body to complete the fixation. But these techniques are still complicated, time-consuming, require a large number of instruments, and are expensive. Moreover, from an anatomical point of view, tendon tissue is mainly composed of longitudinal fibers, and the use of anchor sutures with wires is prone to splitting. From an operational point of view, doctors will encounter some problems during use: suture breakage at the anchor hole, damage to the anchor hole, and suture strength. Doctors need to pay attention to suture quality and improve suture experience, which will affect the effect of rotator cuff fixation. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a rotator cuff injury fixing plate which does not require suturing and knotting, has simple surgical operation and good healing effect.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] A rotator cuff injury fixation plate comprises a plate body, wherein the plate body comprises a tendon fixation portion close to the rotator cuff side, a humeral fixation portion away from the rotator cuff side and lower in height than the tendon fixation portion, and a connecting portion connecting the tendon fixation portion and the humeral fixation portion, wherein:

[0008] The back of the tendon fixing part is provided with inverted teeth for fixing the tendon but not inserted into the humerus, the tendon fixing part is provided with a first nail hole for inserting a first screw to pass through the tendon and fix it on the humerus, and the humerus fixing part is provided with a second nail hole for inserting a second screw to directly fix it on the humerus;

[0009] The nail bodies of the first screw and the second screw are both covered with main threads, and secondary threads are arranged between the main threads, and the diameter of the secondary threads is smaller than the diameter of the main threads.

[0010] Furthermore, the secondary threads are at least two and have the same diameter;

[0011] And / or, the diameter of the second screw body is greater than the diameter of the first screw body.

[0012] Furthermore, the nail bodies of the first screw and the second screw are both provided with penetrating side holes.

[0013] Furthermore, on the nail bodies of the first screw and the second screw, there are at least two side holes on the horizontal plane at the same height of the nail bodies, and they are cross-arranged; on the nail bodies of the first screw and the second screw, along the length direction of the nail bodies, there are at least two side holes arranged in a straight line.

[0014] Furthermore, the first nail hole on the tendon fixing portion is eccentrically designed to be biased toward the inner side of the human body.

[0015] Furthermore, the tendon fixation portion is provided with a through hole;

[0016] And / or, the connecting portion is an arc-shaped hollow design;

[0017] And / or, an instrument insertion hole is provided on the tendon fixing portion.

[0018] Furthermore, the inverted teeth include first inverted teeth and second inverted teeth that are staggered, and the length of the second inverted teeth is 1 / 4-1 / 2 of the length of the first inverted teeth.

[0019] Furthermore, the first inverted teeth and / or the second inverted teeth are designed to be hollow so as to be able to place medicines, and the sides are provided with through holes communicating with the hollow.

[0020] Furthermore, the length of the first inverted tooth is 2 mm-8 mm;

[0021] And / or, the ends of the first inverted teeth and the second inverted teeth are both designed to be conical.

[0022] Further, the tendon fixation portion is hexagonal, wing-shaped or disc-shaped;

[0023] And / or, the humeral fixation portion is circular;

[0024] And / or, the plate body, the first screw and the second screw are all made of polyetheretherketone material.

[0025] The utility model has the following beneficial effects:

[0026] The rotator cuff injury fixing plate of the utility model comprises a plate body, wherein the plate body comprises a tendon fixing part close to the rotator cuff side, a humeral fixing part far from the rotator cuff side, and a connecting part connecting the tendon fixing part and the humeral fixing part, wherein the height of the humeral fixing part is lower than that of the tendon fixing part, so that the whole surface of the plate body will cover the tendon and the humeral head to form a surface-to-surface contact, because when repairing rotator cuff injury, it is necessary to ensure that the rotator cuff stop point is in full contact with the bone surface, to ensure that there is a sufficiently large contact area, and that the uniform contact makes the stress distribution balanced, does not cause stress concentration, and can also maintain blood circulation and support the healing process; The back of the fixing part is provided with inverted teeth for fixing the tendon but not inserted into the humerus. The inverted teeth are easy to insert into the tendon and can be firmly fixed to the tendon; the tendon fixing part is provided with a first nail hole for the first screw to be inserted to pass through the tendon and fixed on the humerus, and the humerus fixing part is provided with a second nail hole for the second screw to be inserted to be directly fixed on the humerus. The plate body is fixed with screws, and suturing and knotting are not required, and the operation is simple; the nail bodies of the first screw and the second screw are both covered with main threads, and secondary threads are provided between the main threads. The diameter of the secondary threads is smaller than the diameter of the main threads. Such a thread design has high pull-out resistance. The rotator cuff injury fixing plate of the utility model fixes the separated tendon tissue on the humeral head again, and suturing and knotting are not required. The operation is simple and the healing effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the rotator cuff injury fixation plate of the utility model;

[0028] Figure 2 for Figure 1 A schematic diagram of the structure of the first screw;

[0029] Figure 3 for Figure 1 Top view of the middle plate. DETAILED DESCRIPTION

[0030] In order to make the technical problems to be solved, technical solutions and advantages of the present invention more clear, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0031] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0032] The utility model provides a rotator cuff injury fixing plate, such as Figure 1-3 As shown, the plate body 1 includes a tendon fixing portion 11 close to the rotator cuff side, a humeral fixing portion 12 away from the rotator cuff side, and a connecting portion 13 connecting the tendon fixing portion 11 and the humeral fixing portion 12, wherein the height of the humeral fixing portion 12 is lower than the height of the tendon fixing portion 11 (see Figure 1 ),in:

[0033] The back of the tendon fixing part 11 is provided with inverted teeth for fixing the tendon but not inserted into the humerus. The tendon fixing part 11 is provided with a first nail hole 17 for inserting a first screw 2 to pass through the tendon and fix it on the humerus. The humeral fixing part 12 is provided with a second nail hole 18 for inserting a second screw 3 to directly fix it on the humerus.

[0034] The first screw 2 and the second screw 3 both adopt a micro-thread design, that is, the nail body 24 thereof is covered with a main thread 21 , and a secondary thread 22 (micro-thread) is provided between the main threads 21 , and the diameter of the secondary thread 22 is smaller than the diameter of the main thread 21 .

[0035] The utility model uses two screws and a plate to re-fix the tendon to the humerus, without the need for suturing and knotting, so that the tendon is in uniform contact with the bone, significantly shortening the operation time, reducing the cost of the operation, and promoting the healing of the rotator cuff. Specifically, during the operation, radio frequency and a planer can be used to clean the bone surface of the rotator cuff attachment point, remove the hyperplastic sclerotic bone, grind off the cortical bone of the attachment point, expose the bleeding bone surface, and restore the activity space of the rotator cuff, which is conducive to the final firm healing of the tendon tissue on the bone surface. Then, a tool is used to clamp the plate body 1, and the inverted teeth pass through the tendon to slightly move the tendon to the appropriate position. Finally, the screws are screwed in by screwing in, that is, the first screw 2 is screwed into the first nail hole 17, and the second screw 3 is screwed into the second nail hole 18 to fix it on the humerus. It is worth noting that after the bone surface is thinned with a ball mill, the cortex will be reduced and the anchor / screw fixation strength will be reduced. Therefore, it should be noted that too much cortical bone should not be removed, otherwise it will lead to loose fixation.

[0036] The rotator cuff injury fixing plate of the utility model comprises a plate body, wherein the plate body comprises a tendon fixing part close to the rotator cuff side, a humeral fixing part far from the rotator cuff side, and a connecting part connecting the tendon fixing part and the humeral fixing part, wherein the height of the humeral fixing part is lower than that of the tendon fixing part, so that the whole surface of the plate body will cover the tendon and the humeral head to form a surface-to-surface contact, because when repairing rotator cuff injury, it is necessary to ensure that the rotator cuff stop point is in full contact with the bone surface, to ensure that there is a sufficiently large contact area, and that the uniform contact makes the stress distribution balanced, does not cause stress concentration, and can also maintain blood circulation and support the healing process; The back of the fixing part is provided with inverted teeth for fixing the tendon but not inserted into the humerus. The inverted teeth are easy to insert into the tendon and can be firmly fixed to the tendon; the tendon fixing part is provided with a first nail hole for the first screw to be inserted to pass through the tendon and fixed on the humerus, and the humerus fixing part is provided with a second nail hole for the second screw to be inserted to be directly fixed on the humerus. The plate body is fixed with screws, and suturing and knotting are not required, and the operation is simple; the nail bodies of the first screw and the second screw are both covered with main threads, and secondary threads are provided between the main threads. The diameter of the secondary threads is smaller than the diameter of the main threads. Such a thread design has high pull-out resistance. The rotator cuff injury fixing plate of the utility model fixes the separated tendon tissue on the humeral head again, and suturing and knotting are not required. The operation is simple and the healing effect is good.

[0037] The rotator cuff injury fixation plate of the utility model innovates the rotator cuff fixation method, adopts a minimally invasive method, only needs to use two screws to fix the tendon to the humerus through the plate, and no longer uses wire anchors, which greatly reduces the amount of instruments and simplifies the operation process. The tendon and ligament damage is small, the surgical operation process is simple and flexible, and the operation time is shortened. The unique micro-thread design makes the screw have a stronger holding force and a more secure fixation. The nail-plate fixation method provides a new idea for the treatment of rotator cuff injuries, simplifies the surgical operation process, saves time and cost, and brings patients faster recovery and more satisfactory postoperative efficacy.

[0038] like Figure 2 As shown, the secondary threads 22 can be at least two and have the same diameter, that is, two small secondary threads 22 are located between the main threads 21, occupying the space between the main threads 21. The design of the double threads with different diameters of the main threads 21 and the secondary threads 22 enables the screw to have a stronger holding force on the bone, and the anti-pullout strength of the inserted bone is greatly increased. In addition, the diameter and length of the first screw 2 and the second screw 3 can be designed according to the anatomical morphology of the patient's shoulder, without specific limitation. The diameter of the nail body of the second screw 3 can be larger than the diameter of the nail body of the first screw 2 to improve the overall fixing strength and reduce interference with the tendon.

[0039] The nail bodies 24 of the first screw 2 and the second screw 3 may be both provided with penetrating side holes 23. After the first screw 2 and the second screw 3 are implanted, the side holes 23 can promote blood circulation and improve blood circulation after the nails are implanted, further improving the prognosis of the patient and promoting faster healing.

[0040] Preferably, there are at least two side holes 23 on the nail body 24 of the first screw 2 and the second screw 3, which are arranged crosswise on the horizontal plane at the same height of the nail body; there are at least two side holes 23 on the nail body 24 of the first screw 2 and the second screw 3, which are arranged in a straight line along the length direction of the nail body. On the one hand, this can further enhance the blood supply effect, and on the other hand, after the bone grows into the nail body 24 through multiple penetrating side holes 23, the reaction force that the nail body 24 is subjected to after being fixed is more symmetrical, thereby improving the installation firmness and avoiding tilting or deflection.

[0041] The first nail hole 17 on the tendon fixing portion 11 can be designed to be eccentric to the inner side of the human body (not in the center), so that the fixation of the tendon is more stable.

[0042] The tendon fixation part 11 may be provided with a through hole 14, which may be designed into a triangle, circle, rectangle, etc. according to specific needs. The through hole 14 allows the tendon to have a healthy blood supply and sufficient oxygen for repair, thereby restoring the continuity and functionality of the rotator cuff. The connecting part 13 may be an arc-shaped hollow design. The through hole 14 on the tendon fixation part 11 and the hollow design of the connecting part 13 are both beneficial to the blood circulation and oxygen supply of the tendon, ensuring that the tendon tissue has sufficient blood flow, avoiding tendon necrosis, and promoting the healing of the tendon-bone interface. The tendon fixation part 11 may be provided with an instrument insertion hole 15, which may be a circular hole, and the number may be a pair, for the instrument to clamp the fixing plate. A tool with two pointed ends may be used to clamp the fixing plate for placement and positioning, which greatly reduces the amount of instruments and simplifies the operation process.

[0043] The inverted teeth may include staggered first inverted teeth 16 and second inverted teeth (not shown), the length of the second inverted teeth being 1 / 4-1 / 2 of the length of the first inverted teeth 16. The different lengths of the inverted teeth and the staggered arrangement can more firmly fix the tendon. In addition, the first inverted teeth 16 and / or the second inverted teeth may be hollow in design for placing drugs and have through holes connected to the hollow on the side. In this way, drugs can be placed in the hollow of the inverted teeth. After implantation into the human body, the drugs seep out through the through holes connected to the hollow, and the therapeutic effect is good.

[0044] The length of the first inverted tooth 16 can be 2mm-8mm, such as 4mm, 5mm, 6mm, etc., and can be flexibly set as needed. The ends of the first inverted tooth 16 and the second inverted tooth can both be tapered to facilitate insertion into the tendon.

[0045] The tendon fixation part 11 can be hexagonal, wing-shaped or disc-shaped, depending on specific needs, so that the contact range between the tendon fixation part 11 and the tendon can be greatly increased. The tendon fixation part 11 contacts the tendon in a planar manner, so that the tendon and the humerus form a flat and uniform contact (the tendon is flatly laid and evenly contacts the bone surface and is fixed by the tendon fixation part 11), and the stress is evenly distributed to accelerate healing. The humeral fixation part 12 can be circular and easy to use. The plate body 1, the first screw 2 and the second screw 3 can all be made of polyetheretherketone (PEEK) material. PEEK has the characteristics of elastic modulus similar to that of bones, excellent mechanical properties, no artifacts under nuclear magnetic resonance, reliable biocompatibility, etc., and has a good use effect.

[0046] In summary, the utility model adopts a nail plate design to fix the torn rotator cuff, which innovates the traditional fixation method using wire anchors. In the traditional method, the anchor is inserted into the bone by screwing in, tapping, etc., and the suture pre-set in the wire anchor is passed through the tendon by tools such as suture needles and wire guides, and then the suture is pressed by the anchor body to fix the damaged soft tissue and bone tissue. Sometimes the suture cuts the tendon, and the surgical procedure is cumbersome and complicated. The nail plate fixation method of the utility model does not require sutures, but only needs to use two screws to press the plate on the tendon to achieve the fixation effect. It is simple to operate, does not rely on skills and experience, reduces the risk of surgical errors, and saves doctors and patients valuable time on the operating table and in training.

[0047] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A rotator cuff injury fixation plate, characterized in that: The plate comprises a tendon fixation portion close to the rotator cuff side, a humeral fixation portion away from the rotator cuff side and lower in height than the tendon fixation portion, and a connecting portion connecting the tendon fixation portion and the humeral fixation portion, wherein: The back of the tendon fixing part is provided with inverted teeth for fixing the tendon but not inserted into the humerus, the tendon fixing part is provided with a first nail hole for inserting a first screw to pass through the tendon and fix it on the humerus, and the humerus fixing part is provided with a second nail hole for inserting a second screw to directly fix it on the humerus; The nail bodies of the first screw and the second screw are both covered with main threads, and secondary threads are arranged between the main threads, and the diameter of the secondary threads is smaller than the diameter of the main threads.

2. The rotator cuff injury fixation plate according to claim 1, characterized in that: There are at least two secondary threads with the same diameter; And / or, the diameter of the second screw body is greater than the diameter of the first screw body.

3. The rotator cuff injury fixation plate according to claim 1, characterized in that: The nail bodies of the first screw and the second screw are both provided with penetrating side holes.

4. The rotator cuff injury fixation plate according to claim 3, characterized in that: There are at least two side holes on the nail bodies of the first screw and the second screw on a horizontal plane at the same height of the nail bodies and they are cross-arranged; there are at least two side holes on the nail bodies of the first screw and the second screw along the length direction of the nail bodies and they are arranged in a straight line.

5. The rotator cuff injury fixation plate according to claim 1, characterized in that: The first nail hole on the tendon fixing portion is eccentrically designed to be biased toward the inner side of the human body.

6. The rotator cuff injury fixation plate according to claim 1, characterized in that: The tendon fixation portion is provided with a through hole; And / or, the connecting portion is an arc-shaped hollow design; And / or, an instrument insertion hole is provided on the tendon fixing portion.

7. The rotator cuff injury fixation plate according to claim 1, characterized in that: The inverted teeth include first inverted teeth and second inverted teeth that are staggered, and the length of the second inverted teeth is 1 / 4-1 / 2 of the length of the first inverted teeth.

8. The rotator cuff injury fixation plate according to claim 7, characterized in that: The first inverted teeth and / or the second inverted teeth are designed to be hollow so as to be able to place medicines, and the sides are provided with through holes communicating with the hollow.

9. The rotator cuff injury fixation plate according to claim 7, characterized in that: The length of the first inverted tooth is 2mm-8mm; And / or, the ends of the first inverted teeth and the second inverted teeth are both designed to be conical.

10. The rotator cuff injury fixation plate according to claim 1, characterized in that: The tendon fixation part is hexagonal, wing-shaped or disc-shaped; And / or, the humeral fixation portion is circular; And / or, the plate body, the first screw and the second screw are all made of polyetheretherketone material.

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