Skull repairing mesh plate

Abstract

The utility model relates to a skull repairing mesh plate which comprises a mesh plate body, a plurality of drainage holes are formed in the middle of the mesh plate body, a diversion trench is formed in the back face of the mesh plate body, the two ends of the diversion trench are connected with the drainage holes respectively, and an outer periphery is arranged on the face, opposite to the back face of the mesh plate body, of the mesh plate body along the periphery of the mesh plate body. The mesh plate is excellent in mechanical property, integrally stable, non-heat-conducting and non-conductive, does not damage skin soft tissues, does not limit the application of later-stage MRI (Magnetic Resonance Imaging) examination of a patient, has no artifact interference in postoperative imaging, does not stimulate tissue allergy and bone autolysis after being implanted into a body for a long time, can be trimmed, and is convenient for intraoperative shaping; the drainage hole is matched with the flow guide groove, so that liquid can be effectively guided to be discharged, and postoperative epidural effusion is reduced; the fixing pieces are arranged on the outer periphery of the screen plate body, so that the stability of the screen plate at the skull defect part can be ensured; the outer peripheral edge adopts a low incisura design, and seamless attachment of the outer peripheral edge of the screen plate and a bone seam is achieved through gradual change of the thickness of the outer peripheral edge.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a skull repair mesh plate. Background Art

[0002] Skull defects are common sequelae of craniocerebral injury and neurosurgery. Skull defects not only cause the brain tissue to lose the barrier function of the normal skull and become susceptible to re-injury, but also affect the appearance and cause various clinical neurological symptoms. Studies have shown that patients with skull defects larger than 3 cm in diameter may develop clinical symptoms. Patients with skull defects often experience skull defect syndrome, which manifests as physical, mental, and psychological symptoms such as dizziness, headache, fear of vibration, inattention, fatigue, irritability, anxiety, depression, localized pain, pain at the edge of the defect, and unbearable localized brain vibration. In the pathological state of skull defects, patients often experience no improvement or worsening of memory, cognition, limb dysfunction, and language dysfunction, and may induce epileptic seizures. Therefore, skull defect repair treatment is necessary.

[0003] The key to successful cranioplasty lies in the choice of graft material, which primarily depends on its support and tissue compatibility. Traditional repair materials include autologous bone and metal. Autologous bone is harvested from the patient's own skull during primary surgery. However, autologous bone can be subject to bone resorption, resulting in a noticeable suture during secondary repair if the autologous bone is too small. Furthermore, autologous bone can continue to resorb after surgery, necessitating a secondary repair. Furthermore, autologous bone requires high preservation requirements and is expensive. Titanium remains the most commonly used material for metal implants, offering excellent mechanical support, displacement resistance, and tissue compatibility. Its plasticity allows tissue to grow through the micropores of the titanium mesh, creating a seamless integration between the two. However, the properties of metals can limit their use for subsequent MRI scans. Long-term implantation can trigger tissue allergies and bone autolysis. Furthermore, metals have high thermal conductivity, and in high-temperature environments, titanium mesh can heat up and burn skin and soft tissue. Furthermore, metals are hard and sharp, easily abrading the skin and exposing the titanium mesh.

[0004] In addition, Peek (polyetheretherketone) is a relatively new skull repair material with high biocompatibility, good hardness, non-temperature conduction, and no imaging interference. However, the surface of Peek (polyetheretherketone) material is smooth, and it is difficult for tissue to grow into the Peek (polyetheretherketone) mesh. The complications of epidural effusion are high, and even stubborn epidural effusion is prone to occur, requiring craniotomy and secondary surgery. Peek (polyetheretherketone) material is high in hardness, making it difficult to trim and shape during surgery. Utility Model Content

[0005] The purpose of the utility model is to address various drawbacks existing in skull defect repair surgery, and to propose a skull repair mesh plate for repairing skull defects and reducing the occurrence of skull defect syndrome.

[0006] In order to solve the problems existing in the prior art, a skull repair mesh is disclosed, including a mesh body, a plurality of drainage holes are arranged in the middle of the mesh body, a guide groove is provided on the back of the mesh body, and the two ends of the guide groove are respectively connected to the drainage holes. An outer peripheral edge is provided along the periphery of the side opposite to the back of the mesh body. The mesh body is made of medical ultra-high molecular polyethylene material, and the back of the mesh body is the side of the mesh body that matches the skull to be repaired.

[0007] Furthermore, the outer peripheral width of the screen body is 1 mm to 20 mm, and the outer peripheral thickness of the screen body is gradually changed from 1 mm to 0.3 mm.

[0008] Furthermore, drainage tube holes are provided on the mesh plate body.

[0009] Furthermore, a fixing piece is provided on the outer periphery of the mesh plate body, and the fixing piece is a circle of pre-drilled holes arranged on the outer periphery of the mesh plate body.

[0010] Furthermore, the hole spacing between two adjacent pre-drilled holes is 4 mm to 10 mm.

[0011] Furthermore, the fixing member also includes a connecting plate.

[0012] Furthermore, the outer periphery of the mesh plate body is in a thin wedge shape, and the outer periphery can cover at least 20% of the perimeter of the damaged skull area.

[0013] Furthermore, the diameter of the drainage holes is 0.8 mm to 2.0 mm, and the distance between two adjacent drainage holes is 6 mm to 10 mm.

[0014] Furthermore, the depth of the guide groove is 1 / 6 to 1 / 3 of the thickness of the mesh plate body, and the width of the guide groove is 1 mm to 3 mm.

[0015] Furthermore, the guide groove is linear, arc-shaped or forked.

[0016] The beneficial effects that may be brought about by the embodiments of this specification include but are not limited to: (1) multiple drainage holes are set in the middle of the mesh to increase the porosity, and the guide grooves set on the back of the mesh can effectively guide the discharge of liquid, prevent the accumulation of liquid in the repair area, and help reduce the occurrence of postoperative epidural effusion; (2) The fixing parts set on the outer periphery of the mesh body allow the mesh and the skull to be fixed with screws and auxiliary fixation with connecting plates, ensuring the stability of the mesh in the skull defect area and preventing the mesh from loosening or shifting after surgery; (3) The mesh is made of medical ultra-high molecular polyethylene material, which makes the mesh as a whole stable, non-heat-conductive, non-electrical, and will not damage the skin. Skin and soft tissue; The polymer material makes the mesh plate not limit the application of the patient's later MRI examination, and there is no artifact interference in the postoperative imaging; The ultra-high molecular polyethylene material has good biocompatibility, so that the mesh plate will not stimulate tissue allergy and bone autolysis when implanted in the body for a long time; In addition, the ultra-high molecular polyethylene material makes the mesh plate trimmable, which is convenient for shaping during surgery; (4) The outer periphery of the mesh plate body adopts a low-notch design at the joint of the bone suture, which makes it easier for the outer periphery of the mesh plate to cover the bone surface or embed into the bone suture, and can achieve seamless fitting between the outer periphery of the mesh plate and the bone suture, thereby enhancing the stable contact between the repair material and the skull and reducing the protrusion or gap at the joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the embodiments or the prior art.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the overall structure of another embodiment of the utility model;

[0020] Figure 3 This is a structural diagram of another embodiment of the utility model with a connecting plate;

[0021] Figure 4 This is another structural schematic diagram of another embodiment of the present invention with a connecting plate;

[0022] Figure 5 This is a structural diagram of an embodiment of the utility model from one angle;

[0023] In the figure: 1- mesh plate body, 2- drainage hole, 3- fixing piece, 31- pre-drilled hole, 32- connecting plate, 4- guide groove, 5- drainage pipe hole. DETAILED DESCRIPTION

[0024] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0025] References to "one embodiment" or "embodiment" herein refer to specific features, structures, or characteristics that may be included in at least one implementation of the present invention. In the description of the present invention, it should be understood that the terms "upper," "inner," and "lower," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplification. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation, and are therefore not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly specifying the number of the technical features referred to. Thus, a feature designated "first" or "second" may explicitly or implicitly include one or more of such features. Furthermore, the terms "first," "second," etc. are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential sequence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present invention described herein can be implemented in an order other than that illustrated or described herein.

[0026] In order to solve the problems existing in the prior art, the present application provides a skull repair mesh. Specifically, Figure 1-Figure 5 As shown, the skull repair mesh comprises a mesh body 1 with multiple drainage holes 2 disposed in the center. A guide groove 4 is disposed on the back of the mesh body 1, with both ends of the guide groove 4 connected to the drainage holes 2. An outer edge is disposed along the periphery of the side of the mesh body 1 opposite the back. The mesh body 1 is made of medical ultra-high molecular weight polyethylene. The back of the mesh body 1 is the side that mates with the skull to be repaired.

[0027] As is well known, ultra-high molecular weight polyethylene (UHMWPE) is a high-performance polymer with a molecular weight of over 1 million, characterized by high strength, high impact resistance, high wear resistance, self-lubrication, chemical resistance, and low-temperature resistance. Adding UHMWPE fibers to an UHMWPE matrix, due to the shared chemical characteristics of the matrix and fibers, results in good chemical compatibility and strong interfacial bonding between the two components, resulting in a composite material with excellent mechanical properties. The addition of UHMWPE fibers significantly improves the tensile strength and modulus, impact strength, and creep resistance of the UHMWPE. Adding 60% UHMWPE fibers by volume to UHMWPE increases the maximum stress and modulus by 160% and 60%, respectively. This self-reinforced UHMWPE material is particularly suitable for load-bearing biomedical applications. UHMWPE boasts non-toxicity, excellent biocompatibility, lightweight properties, and corrosion resistance, making it a highly promising bioprosthetic material.

[0028] The mesh body 1 is made of medical ultra-high molecular polyethylene material, which makes the mesh body 1 stable as a whole, non-heat-conductive, non-electrical, and will not damage the skin and soft tissue; the polymer material makes the mesh body 1 not limit the application of the patient's later MRI examination, and there is no artifact interference in postoperative imaging; the ultra-high molecular polyethylene material has good biocompatibility, so that the mesh body 1 will not stimulate tissue allergic reaction and bone autolysis when implanted in the body for a long time; in addition, the ultra-high molecular polyethylene material makes the mesh body 1 trimmable, which is convenient for intraoperative shaping.

[0029] In one embodiment, the width of the outer periphery of the screen body 1 is 1 mm to 20 mm, and the thickness of the outer periphery of the screen body 1 is gradually changed from 1 mm to 0.3 mm.

[0030] It is understandable that the peripheral width of the mesh body 1 ranges from 1mm to 20mm, allowing doctors to choose a suitable fixing device according to actual needs. The design of a wider peripheral edge (up to 20mm) can provide more contact area, so that the mesh body 1 can fit more firmly on the skull, disperse pressure, and enhance the stability of the implant; the narrower peripheral edge (down to 1mm) can be used for thinner skin coverage areas, avoiding the edge of the repair mesh body 1 being too thick and protruding, reducing skin pressure, friction or irritation, especially in areas with thin scalp and tight skin, the narrow edge can avoid postoperative protrusions and enhance the fit; the larger edge width range enables the repair mesh body 1 to adapt to skull defects of different shapes and sizes. For larger skull defects, the wider edge can provide more support and coverage area; and for smaller or irregular defects, the narrower edge can achieve more precise repairs and avoid unnecessary material accumulation.

[0031] The gradient low-profile design of the outer periphery thickness of the mesh body 1 from 1mm to 0.3mm makes the connection between the outer periphery of the mesh body 1 and the skull defect area smoother and more natural, especially at the bone sutures. The gradual thinning of the thickness helps the mesh to fit the skull more closely, making it easier for the outer periphery of the mesh body 1 to cover the bone surface or embed into the bone sutures; the thinner outer periphery can effectively avoid the friction and wear of the mesh body 1 on the surrounding soft tissues, reduce the risk of local inflammation or infection after surgery, and help reduce the occurrence of epidural effusion. In addition, the change in the thickness of the outer periphery allows doctors to make more flexible adjustments when implanting the mesh body 1. The thicker part provides sufficient support and fixation space, and the thinner part is easy to trim and shape. This allows personalized adjustments to be made according to the patient's specific skull defect to ensure the best surgical effect.

[0032] Further, such as Figure 1 and Figure 2 As shown, the fixing part 3 is a circle of pre-drilled holes 31 arranged on the outer periphery of the mesh body 1, which provides a clear position for the installation of screws, making it convenient for the doctor to quickly and accurately fix the repair mesh body 1 to the skull during the operation. Through these pre-drilled holes 31, the screws can directly pass through the mesh body 1 and be fixed on the skull, ensuring the stability of the mesh body 1 in the skull defect area.

[0033] Preferably, the hole spacing between the pre-drilled holes 31 is 4 mm to 10 mm, which ensures that the mesh plate body 1 is evenly stressed during the fixing process and avoids the phenomenon of local over-tightening or over-loosening.

[0034] In another embodiment, the outer periphery of the mesh body 1 is in the shape of a thin wedge, and the outer periphery can cover at least 20% of the circumference of the damaged skull area. The coverage circumference of the thin wedge-shaped edge structure can be adjusted according to specific circumstances. This flexibility ensures that different functional requirements can be met when used in different areas. For areas that require more support, the outer periphery coverage can be increased, while in more sensitive areas or areas that require flexibility, the outer periphery coverage can be reduced.

[0035] Further, such as Figure 4 As shown, the fixing member 3 also includes a connecting plate 32. The connecting plate 32 serves as an additional fixing device to help further stabilize the repair mesh body 1. Especially when repairing large or complex skull defects, screws alone may not be able to provide sufficient supporting force. Through the auxiliary fixation of the connecting plate 32, the mesh body 1 and the skull can fit more closely, preventing the mesh body 1 from loosening or shifting after surgery.

[0036] Preferably, the connecting plate can have various shapes.

[0037] Further, continue to refer to Figure 1A drainage tube hole 5 is provided on the mesh body 1 for connecting a drainage tube to provide a channel for drainage of the liquid, effectively preventing the occurrence of postoperative complications such as hematoma and effusion, reducing the risk of infection, and reducing local pressure by removing excess liquid, thereby promoting blood circulation and healing of postoperative tissues.

[0038] Preferably, the diameter of the drainage holes 21 is 0.8mm to 2.0mm, and the spacing between the drainage holes 21 is 6mm to 10mm. The provision of the drainage holes 21 increases the porosity, can effectively guide the drainage of liquid, prevent the accumulation of liquid in the repair site, help reduce the occurrence of postoperative epidural effusion, and avoid the risk of local compression, infection, or secondary surgery. According to the shape of the mesh body 1 and the requirements of the repair area, the size of the drainage holes 21 (0.8mm to 2.0mm) and the spacing between the holes (6mm to 10mm) can be flexibly adjusted to ensure the drainage effect while not affecting the mechanical properties and stability of the mesh body 1.

[0039] Preferably, the depth of the guide groove 4 is 1 / 6 to 1 / 3 of the thickness of the mesh body 1, and the width of the guide groove is 1 mm to 3 mm. Through reasonable depth and width design, local stress concentration can be avoided, especially under external impact or pressure, to prevent premature damage or breakage of weak parts of the repaired mesh (such as the guide groove area), increase the impact resistance and durability of the mesh body 1, and ensure its long-term stable operation.

[0040] Preferably, the guide groove 4 is linear, arc-shaped or forked.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A skull repair mesh, comprising a mesh body (1), characterized in that: A plurality of drainage holes (2) are provided in the middle of the mesh plate body (1), a guide groove (4) is provided on the back of the mesh plate body (1), both ends of the guide groove (4) are respectively connected to the drainage holes (2), and an outer peripheral edge is provided along the periphery of the side opposite to the back of the mesh plate body (1). The mesh plate body (1) is made of medical ultra-high molecular polyethylene material, and the back of the mesh plate body (1) is the side of the mesh plate body (1) that matches the skull to be repaired.

2. The skull repair mesh according to claim 1, characterized in that: The outer peripheral width of the screen body (1) is 1 mm to 20 mm, and the outer peripheral thickness of the screen body (1) is gradually changed from 1 mm to 0.3 mm.

3. A skull repair mesh according to claim 1 or 2, characterized in that: The mesh plate body (1) is provided with drainage pipe holes (5).

4. The skull repair mesh according to claim 1, characterized in that: The outer periphery of the mesh plate body (1) is provided with a fixing member (3), and the fixing member (3) is a circle of pre-drilled holes (31) arranged on the outer periphery of the mesh plate body (1).

5. The skull repair mesh according to claim 4, characterized in that: The hole spacing between two adjacent pre-drilled holes (31) is 4 mm to 10 mm.

6. The skull repair mesh according to claim 4, characterized in that: The fixing member (3) further comprises a connecting plate (32).

7. The skull repair mesh according to claim 1 or 5, characterized in that: The outer periphery of the mesh plate body (1) is in a thin wedge shape, and the outer periphery can cover at least 20% of the perimeter of the damaged skull area.

8. The skull repair mesh according to claim 1, characterized in that: The diameter of the drainage holes (2) is 0.8 mm to 2.0 mm, and the hole spacing between two adjacent drainage holes (2) is 6 mm to 10 mm.

9. The skull repair mesh according to claim 1, characterized in that: The depth of the guide groove (4) is 1 / 6 to 1 / 3 of the thickness of the mesh plate body (1), and the width of the guide groove (4) is 1 mm to 3 mm.

10. The skull repair mesh according to claim 9, characterized in that: The guide groove (4) is in the shape of a line, an arc or a fork.

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