Sleeve patch with differentiated forming meshes, warp knitting method and mounting method

Abstract

The invention relates to a rotator cuff patch with differentiated forming meshes, a warp knitting method and an installation method, and relates to the technical field of surgical patches. A rotator cuff patch with differentiated forming meshes is characterized in that the rotator cuff patch is formed by weaving two groups of polymer multifilament bundles, yarns of one group of polymer multifilament bundles are mutually strung and sleeved to form a binding part after being bent into loops, and yarns of the other group of polymer multifilament bundles are lined in the weft direction and then clamped by loops of the binding part to form a muscle and bone part; the density of the polymer multifilament bundle of the binding part is adjustable, and the polymer multifilament bundle of the muscle and bone part is a fully-stretched straight filament. According to the rotator cuff patch with the differentiated forming meshes, the warp knitting method and the mounting method, the deformation quantity of the patch in the stretching process is controlled to be close to that of a native tissue by adjusting the density and adding the weft insertion, so that the better fixing effect is achieved, creep deformation is reduced, the fatigue resistance of the patch is improved, and the mechanical failure phenomenon is not prone to occurring.

Description

Technical Field

[0001] The present invention belongs to the field of surgical patches, and in particular relates to a rotator cuff patch with differentiated shaped meshes, a warp knitting method and an installation method. Background Art

[0002] Rotator cuff tear is a common shoulder disease, and the incidence rate gradually increases with age. Rotator cuff tear can cause pain in arm movement, reduced range of motion, limited function, or even inability to move. Its pathogenesis is diverse, including chronic degenerative tears, chronic impingement, acute avulsion injuries, iatrogenic injuries, etc., accounting for about 60% of shoulder lesions. With the continuous advancement of the aging of the global population, rotator cuff disease will gradually become an important social health issue in the future. For patients with rotator cuff injuries and giant rotator cuff tears who have not responded to conservative treatment, surgical treatment is usually performed to repair the torn tendon, thereby relieving pain and reconstructing joint function.

[0003] The difficulty in healing the tendon-bone interface is the main limiting factor in the rotator cuff repair process, especially when the damage is severe and the tendon retracts severely. It is difficult to perform traction and suture during the operation, try to fix the tendon to the original footprint area, and try to fix the large torn rotator cuff tissue to the original attachment point before the injury. It is necessary to use external structures to enhance the mechanical properties, solve the problem of excessive tension, and provide sufficient mechanical support for tendon repair.

[0004] In existing research, commonly used materials for rotator cuff patches can be divided into two categories: synthetic materials and biomaterials. Among them, biomaterials are not effective due to their easy immunogenic reactions and poor mechanical properties. Synthetic materials can meet the mechanical performance requirements, but the microenvironment has no promoting effect on cell growth.

[0005] The existing rotator cuff patch fixation method in surgical applications requires opening the medullary canal and adopting an open surgical method for treatment. This method has many disadvantages. First, compared with minimally invasive surgery, open surgery has a higher risk factor, a longer healing period, and higher requirements for postoperative recovery care; secondly, opening the medullary canal requires higher bone quality in patients. For patients with osteoporosis or undergoing secondary surgery, it is very difficult to find a suitable position to open the medullary canal; it is important to note that the wiper effect of the medullary canal-opening fixed patch on the medullary canal may cause the medullary canal to expand and make the patch ineffective, and it cannot provide mechanical support for the healing of the rotator cuff tendon. At the same time, the surgical suture pierces the patch, and a shearing effect is produced on a single yarn each time during use, which greatly damages the mechanical properties of the patch. Clinically, there is a need for a rotator cuff patch with higher universality, which can perform minimally invasive surgery and make surgical operations more convenient.

[0006] Therefore, there is an urgent need for a rotator cuff patch with excellent mechanical properties, good biocompatibility, a macroscopic morphology that can support minimally invasive surgery, and a microscopic morphology that is suitable for cell growth. Summary of the invention

[0007] We hope that by adjusting the patch pores and yarn diameter, the knitted rotator cuff patch can have a microenvironment suitable for tendon-bone insertion healing and guide cell oriented growth. The present application provides a rotator cuff patch with a differentiated formed mesh, a warp knitting method and an installation method.

[0008] In a first aspect, the present application provides a rotator cuff patch with a differentiated shaped mesh, which adopts the following technical solution: A rotator cuff patch with a differentially formed mesh, comprising: the rotator cuff patch is woven from two groups of polymer multifilament bundles, wherein the yarns of one group of polymer multifilament bundles are bent into loops and then interlaced with each other to form a binding part, and the yarns of the other group of polymer multifilament bundles are inserted in the weft direction and then clamped by the coils of the binding part to form a tendon part; The density of the polymer multifilament bundle in the binding part is adjustable, and the polymer multifilament bundle in the tendon part is a fully stretched straight yarn.

[0009] By adopting the above technical solution and adjusting the density of the polymer multifilament bundle in the binding part, the patch can be stretched to a limited extent when subjected to force, and can shrink to its original state after the force disappears, thereby avoiding the phenomenon that high tension is applied when fixing the torn rotator cuff, which may cause the patch to become loosely fixed.

[0010] At the same time, fully stretched straight wire weft lining (tendon and bone part) is added to control the deformation of the patch during the stretching process to be close to that of the original tissue, thereby having a better fixation effect, reducing creep and increasing its fatigue resistance, and being less likely to cause mechanical failure; the patch of the present application can provide long-term good mechanical strength and good biocompatibility, which is helpful for early postoperative rehabilitation exercises and recovery of rotator cuff function.

[0011] Optionally, the polymer multifilament bundle of the binding part is stretched and deformed into a micro-curled shape, and the coil density of the patch is increased by shrinking after weaving, and the coil density ranges from 200 μm to 300 μm.

[0012] By adopting the above technical solution, the coil density of the patch can be increased by retracting after the lining is woven. The coil density can be adjusted to change the size of the small mesh, thereby adjusting the pores of the patch so that the density of the patch is suitable for cell growth, so that the woven rotator cuff patch can have a microenvironment suitable for tendon-bone attachment healing and guide cell oriented growth.

[0013] Optionally, the rotator cuff patch includes a main body area with small mesh holes and a large mesh hole area for suturing, and the thickness of the rotator cuff patch ranges from 0.91 mm to 0.95 mm.

[0014] By adopting the above technical solution, the large mesh can provide a fixed site for the sutures in minimally invasive rotator cuff surgery, so the sutures will not pass through the main area of ​​the patch and will not cause shearing effect on the yarn; the small mesh is suitable for the proliferation of tendon cells, can promote the growth of tendon cells, and accelerate the healing of the rotator cuff after surgery.

[0015] Optionally, the main body area and the formed large mesh area for suturing are realized by a yarn air-through design and a yarn padding structure design, and the rotator cuff patch is integrally formed and woven.

[0016] By adopting the above technical scheme, the yarn threading is set on the basis of a predetermined size using a knitting machine, and the warp feed amount is set in coordination with the warp threading design to change the knitting code to obtain a knitted shoulder cuff patch with suture holes; since the one-piece knitting does not involve cutting and other links, there is a complete connection between the yarns, and the patch as a whole is connected when stressed, and some yarns of the various multifilaments will transform into each other when stressed, effectively extending the service life of the shoulder cuff patch implanted in the human body and avoiding patch creep.

[0017] Optionally, the large mesh holes in the large mesh area for suturing are rectangular mesh holes and are evenly distributed on the edge of the rotator cuff patch, and the size of the rectangular mesh holes is 3mmx3mm.

[0018] By adopting the above technical solution, rectangular mesh holes are set at the edge of the patch as a suture mesh structure, which is beneficial to the penetration and fixation of sutures in minimally invasive surgery for rotator cuff repair and reduces puncture damage to the rotator cuff patch.

[0019] Optionally, both groups of polymer multifilament bundles are made of high-density inert material PET, one of which is a stretched and deformed bundle for forming a bundle, and the bundle linear density ranges from 150D to 300D, and the number of fibers is 36 per bundle; The other group is used to form the tendons and bones, and the yarn density ranges from 2000 to 3000D, and the number of fibers is 372 per bundle.

[0020] By adopting the above technical solution, the diameter and fiber number of the binding yarn and the weft inserting yarn are suitable for tendon growth.

[0021] Optionally, the size of the rotator cuff patch is 30mmx20mm or 35mmx25mm.

[0022] In a second aspect, the present application provides a warp knitting method for a rotator cuff patch, which is used for the aforementioned rotator cuff patch and adopts the following technical solution: A warp knitting method for a rotator cuff patch, wherein the rotator cuff patch is knitted by three comb bars GB1, GB2 and GB3, and the inlay yarn number of GB1 is: 1-0 / 4-5 / 1-0 / 4-5 / 4-5 / 4-5 / 1-0 / 4-5 / 1-0 / 4-5 / 1-0 / 4-5 / 1-0 / 4-5 / / , the threading method is 3 through and 3 empty; The inlay yarn number of GB2 is: 4-5 / 1-0 / 4-5 / 1-0 / 1-0 / 1-0 / 4-5 / 1-0 / 4-5 / 1-0 / 4-5 / 1-0 / 4-5 / 1-0 / / , the threading method is 3 empty and 3 threading; The inlay yarn number of GB3 is: 5-5 / 0-0 / / , the threading method is 1 through 5 empty.

[0023] By adopting the above technical solution, the obtained rotator cuff patch with a large mesh area for suturing is an integrally formed part, woven from polymer multifilament bundles, and consists of a main body area and a large mesh area for suturing.

[0024] In a third aspect, the present application provides a method for installing a rotator cuff patch, which is used for the aforementioned rotator cuff patch and adopts the following technical solution: A method for installing a rotator cuff patch, wherein the lining is fixed to the humerus by screws.

[0025] By adopting the above technical solution, it is possible to avoid opening the bone marrow canal to fix the bone ends of the patch, and also avoid the expansion of the bone marrow canal caused by the wiper effect of the patch. It provides the possibility of repair surgery after a huge rotator cuff tear for patients with osteoporosis and other patients who are not suitable for opening the bone marrow canal, and it can also effectively reduce the surgical risks for ordinary patients.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: by adjusting the density and adding weft lining, the deformation of the patch during the stretching process is controlled to be close to that of the original tissue, thereby having a better fixation effect, reducing creep and increasing its fatigue resistance, and being less likely to experience mechanical failure; and by adjusting the patch pores and yarn diameter, the woven rotator cuff patch can have a microenvironment suitable for tendon-bone attachment healing and guide cell oriented growth. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a rotator cuff patch with a differentiated shaped mesh according to the present application; Figure 2 is a schematic diagram of a warp knitted insulated yarn of a rotator cuff patch with a differentiated formed mesh according to the present application; Figure 3 It is a diagram showing the movement of the yarn pads of each comb bar in the warp knitting of the rotator cuff patch of the present application.

[0028] Description of reference numerals: 1. Main body area; 11. Small mesh; 2. Large mesh area for suturing; 21. Rectangular mesh; 10. Binding part; 20. Muscle and bone part. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-Figure 3 This application is described in further detail.

[0030] The embodiment of the present application discloses a rotator cuff patch with a differentially shaped mesh. Example: Reference Figure 1 and Figure 2 A rotator cuff patch with differentiated formed meshes includes a main body region 1 and a large formed mesh region 2 for suturing, and the thickness of the rotator cuff patch ranges from 0.91 mm to 0.95 mm. The main body region 1 can provide all-directional stable mechanical support for the torn rotator cuff, provide attachment points for cells, and provide a microenvironment suitable for cell proliferation.

[0031] The suture forming large mesh area 2 has large meshes, which are rectangular meshes 21 and are evenly distributed on the edge of the patch. The size of the rectangular mesh 21 is preferably 3 mm in length and 3 mm in width, so the size of the rectangular mesh 21 is 3 mm x 3 mm. The center of the rectangular mesh 21 is 3 mm away from the edge close to it. In this application, mm represents millimeters and μm represents micrometers.

[0032] The suture is used to suture the tendon and the patch. The large mesh can provide a fixed site for the suture in minimally invasive rotator cuff surgery, so the suture will not pass through the patch main area 1 and will not shear the yarn. In addition, a rectangular mesh 21 is set at the edge of the patch as a suture mesh structure, which is conducive to the penetration and fixation of the suture in minimally invasive surgery for rotator cuff repair, and reduces the puncture damage of the rotator cuff patch. At the same time, it avoids the common open bone marrow tract penetration fixation in the traditional suture fixation form, provides a new fixation method, reduces surgical risks, and shortens the recovery period of rotator cuff surgery. At the tendon end, the patch and the tendon are combined in a suture fixation method, which helps the tendon tissue grow into the patch and promotes rotator cuff repair. If screws are used, it is not conducive to the recovery of the rotator cuff; at the humeral end, the combination of the bone and the patch can be a suture traction patch and a screw fixation to the humerus, or a screw fixation to the humerus can be directly used. The present application adopts a traction suture plus a screw method.

[0033] Figure 1It illustrates the situation where three rectangular mesh holes 21 are spaced apart at one edge of the patch, and another three rectangular mesh holes 21 are spaced apart at the other edge of the opposite side. The distances between the rectangular mesh holes 21 on the four corners of the patch and the two adjacent sides are all 3 mm, and the distances between the three rectangular mesh holes 21 on the same side and the adjacent side are all 3 mm.

[0034] Please refer to Figure 3 The rotator cuff patch in the present application is woven from two groups of polymer multifilament bundles, wherein the yarns of one group of polymer multifilament bundles are bent into loops and then interlaced with each other to form a binding portion 10, and the yarns of the other group of polymer multifilament bundles are inserted in the weft direction and clamped by the coils of the binding portion 10 to form a tendon portion 20.

[0035] The binding part 10 and the tendon part 20 are both made of high-density inert material polyethylene terephthalate, that is, PET material. PET is an inert fiber material with biocompatibility and certain biomechanical properties. The binding part 10 is a stretched deformed yarn bundle with a yarn density range of 150D to 300D, and the number of fibers is 36 per bundle. The tendon part 20 is a fully stretched multifilament bundle with a yarn density range of 2000 to 3000D, and the number of fibers is 372 per bundle. The diameter and fiber number of the binding yarn 10 and the tendon part 20 are suitable for tendon growth. Among them, D is the abbreviation of denier.

[0036] A plurality of small mesh holes 11 are formed in the main body area 1, and the pore size is 200μm-300μm, which is the optimal pore size for the growth of tendon cells, and can provide a good environment for the growth of tendon cells and promote the healing of the rotator cuff. The present application forms a rotator cuff patch with differentiated meshes by setting small mesh holes 11 and large mesh holes, and the coil density is reflected by the size of the small mesh holes 11. Among them, the aperture does not specifically refer to the diameter or radius of a circular hole, but is used to describe the maximum linear size of the pore. If it is a square hole, the aperture refers to its side length. The pores can be of different shapes, including circular, elliptical, square or irregular shapes. Here, the aperture is the distance between two yarns in the fabric.

[0037] The polymer multifilament bundle of the binding part 10 is a low-elastic polyester composite yarn, which is stretched and deformed into a micro-curled shape. After weaving, the coil density of the patch is increased by shrinking. Adjusting the coil density can change the size of the small mesh 11, thereby making the density of the polymer multifilament bundle of the binding part 10 adjustable, so that the patch density is suitable for cell growth. The coil density range is 200μm-300μm, which is the aperture of the aforementioned small mesh 11.

[0038] The polymer multifilament bundles of the tendon portion 20 are fully stretched straight yarns, thereby forming a reinforced weft insert, which can reduce the deformation of the patch, make the patch's organizational structure and mechanical properties more stable, and not easy to fall apart, thereby reducing the mechanical creep generated during long-term service.

[0039] This embodiment controls the deformation of the patch during stretching to be close to that of the original tissue by adjusting the coil density and adding weft insertion (rib part 20), thereby having a better fixation effect, reducing creep and increasing its fatigue resistance, and being less likely to suffer from mechanical failure.

[0040] The specific method for adjusting the coil density can be: the coil density is controlled by the transverse density and the longitudinal density, the transverse density is determined by the warp knitting machine gauge, and this patent uses a warp knitting machine with a gauge of E=24 needles, that is, a warp knitting machine with a gauge of 24.

[0041] The lateral density is Its longitudinal density depends on the control of yarn linear density, warp let-off and other parameters, and its calculation method is as follows: Where: P a is the transverse density (longitudinal row / cm); P b is the longitudinal density (rows / cm); D is the yarn density; G is the fabric surface density, which is the weight per unit area of ​​the fabric, in g / m 2 R 1 , R 2 The warp delivery of the front and rear comb bars respectively (mm / 480 rows); T t1 , T t2 The yarn linear density of the front and rear combing bars respectively (tex, tex can be converted to denier, tex = D / 9).

[0042] The longitudinal density can be changed by adjusting the warp feed amount. The warp feed amount can be set on the machine. If the longitudinal density is small (the small mesh 11 has a large aperture), the warp feed amount needs to be increased. If the longitudinal density is large (the small mesh 11 has a large aperture), the warp feed amount needs to be reduced.

[0043] In addition, the present application can also adjust the gradient pore size between fiber bundles and the porosity of the patch by setting the bending depth, so that the patch is suitable for the gradient regeneration and ingrowth of tendon and bone cells, and improve the healing effect. The bending depth is related to the transverse density and the longitudinal density. The formula is as mentioned above. R1 and R2 in the formula are the warp feed amount. The bending depth can be changed by controlling the warp feed amount. The greater the bending depth, the smaller the coil density (the smaller mesh 11 has a larger aperture), thereby changing the density.

[0044] The size of the rotator cuff patch in the present application is 30 mm in length and 20 mm in width or 35 mm in length and 25 mm in width.

[0045] The main body area 1 and the sutured large mesh area 2 of the above-mentioned shoulder cuff patch are realized by the open-thread design of the yarn and the inlay yarn organization design, and the shoulder cuff patch in the present application is an integrally formed braided piece. The integrally formed braided piece has stable mechanical properties, which can avoid damage to the patch performance caused by cutting, sewing and other operations in the later processing, and the integrally formed braiding method is conducive to improving processing efficiency.

[0046] The embodiments of the present application also disclose a warp knitting method for the above-mentioned rotator cuff patch. Example: Reference Figure 3 A warp knitting method for a rotator cuff patch with a differentially formed mesh is used for the above-mentioned rotator cuff patch. In this embodiment, a knitting machine is used to set the yarn threading on the basis of a predetermined size, and the knitting code is changed by setting the warp let-off amount and coordinating the threading design to obtain a knitted rotator cuff patch with suture holes.

[0047] The present embodiment adopts continuous sheet weaving. Since the continuously woven knitted rotator cuff patch is not cut or other links are performed, the yarns are completely connected. When subjected to force, the entire patch is connected. When subjected to force, some yarns of each part of the multifilament will transform into each other, which effectively prolongs the service life of the rotator cuff patch implanted in the human body, avoids patch creep, reduces the risk of secondary surgery, shortens the process flow, reduces manpower consumption, and saves production time.

[0048] A warp knitting method for a rotator cuff patch with a differentiated shaped mesh comprises the following steps: Step 1: Prepare two groups of PET multifilaments with linear densities of 200 denier and 2000 denier.

[0049] Step 2: Using a knitting machine with a machine number of E24, by changing the inlay yarn number and the warp drawing design, a uniformly distributed suture mesh part and a main structure are knitted to obtain a knitted shoulder cuff patch with a suture mesh structure; It is woven by three comb bars GB1, GB2 and GB3. The yarn number of GB1 is: 1-0 / 4-5 / 1-0 / 4-5 / 4-5 / 4-5 / 1-0 / 4-5 / 1-0 / 4-5 / 1-0 / 4-5 / 1-0 / 4-5 / / , the threading method is 3 through and 3 empty; GB2's inlay yarn numbers are: 4-5 / 1-0 / 4-5 / 1-0 / 1-0 / 1-0 / 4-5 / 1-0 / 4-5 / 1-0 / 4-5 / 1-0 / 4-5 / 1-0 / / , the threading method is 3 empty and 3 threading; GB3's inlay yarn numbers are: 5-5 / 0-0 / / , the threading method is 1 through 5 empty.

[0050] The knitted shoulder cuff patch with suture mesh structure finally obtained is an integrally formed part, woven from polymer multifilament bundles, and consists of a main body area 1 and a large suture mesh area 2; ideally, the warp let-off can be adjusted to obtain a patch with a size of 30mmx20mm. The patch of this specification has 3 suture mesh holes in the longitudinal direction and 2 suture mesh holes in the transverse direction, and the suture holes are evenly distributed on the edge of the shoulder cuff patch. Specifically, the number of mesh holes per inch in the 20mm width direction of the knitting machine is 2, and the number of mesh holes in the 30mm length in the knitting direction is 3.

[0051] Example 2 The difference between Example 2 and Example 1 lies in step 1. In this application example, there are two groups of PET multifilaments with linear density of 300 denier and 2000 denier.

[0052] The final size of the rotator cuff patch is 30mmx25mm.

[0053] The embodiment of the present application also discloses a method for installing the above-mentioned rotator cuff patch. Example: The aforementioned rotator cuff patch is suitable for minimally invasive surgery in clinical applications, and the lining is fixed to the humerus by screws. There is no need to open the bone marrow canal to fix the bone end of the patch, avoiding the expansion of the bone marrow canal caused by the wiper effect of the patch, and providing osteoporosis patients and other patients who are not suitable for opening the bone marrow canal with the possibility of repair surgery after a huge rotator cuff tear. For ordinary patients, it can also effectively reduce the surgical risk and reduce the probability of secondary surgical repair.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A rotator cuff patch with a differentiated shaped mesh, characterized in that: The rotator cuff patch is woven from two groups of polymer multifilament bundles, wherein the yarns of one group of polymer multifilament bundles are bent into loops and then interlaced with each other to form a binding portion (10), and the yarns of the other group of polymer multifilament bundles are inserted in the weft direction and then clamped by the coils of the binding portion to form a tendon portion (20); The density of the polymer multifilament bundle of the binding part (10) is adjustable, and the polymer multifilament bundle of the tendon part (20) is a fully stretched straight filament.

2. The rotator cuff patch according to claim 1, characterized in that: The polymer multifilament bundle of the binding part (10) is stretched and deformed into a micro-curled shape, and after weaving, the coil density of the patch is increased by shrinking, and the coil density ranges from 200µm to 300µm.

3. The rotator cuff patch according to claim 1 or 2, characterized in that: The rotator cuff patch comprises a main body region (1) with small mesh holes (11) and a suture-forming large mesh hole region (2), and the thickness of the rotator cuff patch ranges from 0.91 mm to 0.95 mm.

4. The rotator cuff patch according to claim 3, characterized in that: The main body area (1) and the large mesh area (2) for suturing are realized by means of a yarn air-through design and a yarn padding structure design, and the rotator cuff patch is an integrally formed braided one.

5. The rotator cuff patch according to claim 3, characterized in that: The large mesh holes of the suture forming large mesh area (2) are rectangular mesh holes (21) and are evenly distributed on the edge of the rotator cuff patch. The size of the rectangular mesh holes is 3 mm x 3 mm.

6. The rotator cuff patch according to claim 1, characterized in that: Both groups of polymer multifilament bundles are made of high-density inert material PET, one of which is a stretched and deformed bundle for forming a bundle (10), and the bundle linear density ranges from 150D to 300D, and the number of fibers is 36 per bundle; The other group is used to form the tendon part (20), and the yarn bundle linear density ranges from 2000 to 3000D, and the number of fibers is 372 per bundle.

7. The rotator cuff patch according to claim 1, characterized in that: The size of the rotator cuff patch is 30mmx20mm or 35mmx25mm.

8. A warp knitting method for a rotator cuff patch, used for the rotator cuff patch according to any one of claims 1 to 7, characterized in that: The rotator cuff patch is woven by three comb bars GB1, GB2 and GB3, and the inlay yarn number of GB1 is: 1-0 / 4-5 / 1-0 / 4-5 / 4-5 / 4-5 / 1-0 / 4-5 / 1-0 / 4-5 / 1-0 / 4-5 / 1-0 / 4-5 / / , the threading method is 3 through and 3 empty; The inlay yarn number of GB2 is: 4-5 / 1-0 / 4-5 / 1-0 / 1-0 / 1-0 / 4-5 / 1-0 / 4-5 / 1-0 / 4-5 / 1-0 / 4-5 / 1-0 / / , the threading method is 3 empty and 3 threading; The inlay yarn number of GB3 is: 5-5 / 0-0 / / , the threading method is 1 through 5 empty.

9. A method for installing a rotator cuff patch, used for the rotator cuff patch according to any one of claims 1 to 7, characterized in that: The lining is fixed to the humerus by screws.

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