Individualized skull repair plate based on additive manufacturing

Abstract

The utility model discloses a personalized skull repair plate based on additive manufacturing, which comprises a base plate body and bone cement, and a plurality of drainage meshes are arranged on the base plate body; the bone cement is formed by pouring through a mold and wraps the base plate body, and the shape of the bone cement is the same as that of the base plate body; the skull plate in the scheme has good strength, makes up for insufficient strength of bone cement, can avoid discomfort of a patient caused by too fast heat conduction of metal, and can improve the comfort of the patient and the wearing stability.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and in particular to a personalized skull repair plate based on additive manufacturing. Background Art

[0002] Skull defects are commonly caused by trauma or the need for craniotomy. Generally, skull defects require repair of the defective area, usually using titanium mesh or PEEK materials. During surgery, a skull repair plate is placed at the defect. When the skull repair plate is repaired with PEEK material, there are defects such as expensive materials and the non-bonding surface between the skull plate and the bone. Therefore, titanium mesh is often used for skull plates.

[0003] For example, the skull mesh provided by publication number CN202409130U includes a square mesh body, a plurality of long mesh holes and a plurality of short mesh holes provided on the square mesh body, and a plurality of screw holes provided on the square mesh body; wherein the square mesh body is a titanium mesh.

[0004] However, due to the thermal conductivity of metal materials, the existing titanium mesh plates will transfer temperature to the patient's contact parts in overheated or overcooled environments after repair, which can easily cause discomfort to the patient and even burns in severe cases. Utility Model Content

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and propose a personalized skull repair plate based on additive manufacturing to solve the technical problem in the prior art that the heat conduction of the titanium mesh plate in an overheated or overcooled environment may cause discomfort to the patient, and in severe cases may cause burns.

[0006] In order to achieve the above technical purpose, the present invention adopts the following technical solutions:

[0007] The utility model provides a personalized skull repair plate based on additive manufacturing, comprising: a base body and bone cement, wherein the base body is provided with a plurality of drainage mesh holes; the bone cement is cast by a mold and wrapped around the base body, and the shape of the bone cement is the same as that of the base body.

[0008] In some embodiments, the substrate body is a titanium mesh plate, and the substrate body includes a mesh body and a frame body. The mesh body includes a plurality of crisscrossing ribs, and the gaps between the ribs are drainage mesh holes, and the drainage mesh holes are square holes; the frame body is arranged around the edge of the mesh body.

[0009] In some embodiments, the edge of the frame is aligned with the edge of the bone cement; the contact surface between the skull repair plate and the skull is titanium alloy, which is convenient for bone integration.

[0010] In some embodiments, the edge of the frame protrudes beyond the edge of the bone cement, and a trabecular bionic structure is provided on the outside of the frame, and the trabecular bionic structure is located on the outside of the bone cement; the skull repair plate is in direct contact with the skull, and the contact surface is the trabecular microporous bionic structure, so that a stable effect can be obtained after bone growth.

[0011] In some embodiments, the personalized skull repair plate based on additive manufacturing also includes a titanium nail fixing portion arranged on the substrate body; wherein, the titanium nail fixing portion includes a titanium nail fixing plate, and the titanium nail fixing plate is provided with titanium nail fixing holes, the substrate body has multiple side edges, and at least one titanium nail fixing plate is provided on each side edge of the substrate body.

[0012] In some embodiments, a titanium nail fixing plate is provided on each side of the substrate body, the titanium nail fixing plate is provided in the center of the side of the substrate body, and the titanium nail fixing plate extends outward from the side of the substrate body.

[0013] Compared with the existing technology, the personalized skull repair plate based on additive manufacturing provided by the present invention has a base plate body and bone cement, and the bone cement is wrapped around the base plate body to form an integral body with the base plate body, so that the skull plate has good strength. The base plate body serves as the skeleton of the skull plate, and the bone cement is wrapped around the outside of the base plate body to avoid direct contact between the metal base plate body with good thermal conductivity and the patient, which makes up for the insufficient strength of the bone cement and can avoid the discomfort of the patient caused by excessive heat conduction of the metal; the bone cement is cast and formed by a mold, which is conducive to improving the fit between the skull plate and the contact part of the patient. Its shape is determined according to the pre-designed mold, which can ensure the patient's comfort and stability of wearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of an embodiment of a personalized skull repair plate based on additive manufacturing provided by the present invention, in which the contact surface with the skull is titanium alloy before bone cement is poured;

[0015] Figure 2 This is a schematic structural diagram of a personalized skull repair plate based on additive manufacturing provided by an embodiment of the present invention after bone cement is poured when the contact surface with the skull is titanium alloy;

[0016] Figure 3 This is a schematic structural diagram of a personalized skull repair plate based on additive manufacturing provided by an embodiment of the present invention, in which the contact surface with the skull is made of titanium alloy;

[0017] Figure 4This is a schematic structural diagram of another embodiment of the personalized skull repair plate based on additive manufacturing provided by an embodiment of the present invention, in which the contact surface with the skull is a trabecular bionic structure before bone cement pouring;

[0018] Figure 5 This is a schematic structural diagram of a personalized skull repair plate based on additive manufacturing provided by an embodiment of the present invention after bone cement is poured when the contact surface with the skull is a trabecular bionic structure;

[0019] Figure 6 This is a structural schematic diagram of a personalized skull repair plate based on additive manufacturing provided by an embodiment of the present invention, in which the contact surface with the skull is a trabecular bionic structure.

[0020] Explanation of the accompanying reference numerals: 1. Base plate body; 101. Drainage mesh; 11. Mesh body; 12. Frame body; 13. Trabecular bionic structure; 2. Bone cement; 3. Titanium nail fixing part; 31. Titanium nail fixing plate; 32. Titanium nail fixing hole. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] In order to solve the technical problem that the existing titanium mesh plate will transfer the temperature to the patient's contact part in an overheated or overcooled environment after repair, which may easily cause discomfort to the patient and even burns in severe cases, the utility model provides a personalized skull repair plate based on additive manufacturing. The internal reinforcement of the skull repair plate is additively manufactured and then cast into one with bone cement. It has good strength, which makes up for the insufficient strength of bone cement while avoiding the discomfort caused by the excessive heat conduction of metal.

[0023] It should be noted that the personalized skull repair plate based on additive manufacturing described in the present invention is used for but not limited to skull repair, etc. For the sake of convenience, in the present invention, only the personalized skull repair plate based on additive manufacturing is used for skull repair as an example. The principle of using the personalized skull repair plate based on additive manufacturing in other types of operations is essentially the same as the principle of using it in skull repair operations, so they will not be elaborated here.

[0024] See also Figures 1 to 6 The personalized skull repair plate based on additive manufacturing includes: a substrate body 1 and bone cement 2, the substrate body 1 is provided with a plurality of drainage mesh holes 101; the bone cement 2 is cast by a mold and wrapped around the substrate body 1, and the shape of the bone cement 2 is the same as that of the substrate body 1.

[0025] In this solution, a base plate body 1 and bone cement 2 are provided, and the bone cement 2 is cast and formed by a mold, which is beneficial to improving the fit between the skull plate and the contact part of the patient, and can improve the patient's comfort and wearing stability; a plurality of drainage mesh holes 101 are opened on the base plate body 1, and the drainage mesh holes 101 are used to reduce the weight of the base plate body 1, making the skull plate lightweight. At the same time, the drainage mesh holes 101 can allow the bone cement 2 to flow on both sides of the base plate body 1, which is beneficial to the casting and forming of the bone cement 2; the bone cement 2 is wrapped in the base plate body 1, so that the bone cement 2 and the base plate body 1 form a whole, so that the skull plate has good strength. The base plate body 1 serves as the skeleton of the skull plate, and the bone cement 2 is wrapped on the outside of the base plate body 1 to avoid direct contact between the metal base plate body 1 with good thermal conductivity and the patient, making up for the insufficient strength of the bone cement 2 while avoiding the discomfort of the patient caused by excessive heat conduction of the metal.

[0026] It should be noted that the base body 1 of the skull repair plate and the forming mold of the bone cement 2 are both printed by a 3D printer. The 3D digital modeling of the patient's data is mainly based on the CT data provided by the hospital to obtain information such as the size, position, and shape of the patient's skull defect. A personalized titanium alloy composite skull repair plate is designed based on the defective part to ensure that the formed skull repair plate fits the defective part completely.

[0027] In this embodiment, the substrate body 1 is a titanium mesh plate made of titanium alloy. The substrate body 1 consists of a mesh 11 and a frame 12. The mesh 11 is located in the middle of the substrate body 1 and is composed of a plurality of crisscrossing ribs. The frame 12 is arranged around the edge of the mesh 11. Gaps are formed between the crisscrossing ribs, which are drainage mesh holes 101 and are square holes.

[0028] In one embodiment, see Figures 1 to 3 The edge of the frame 12 is aligned with the edge of the bone cement 2, so that when the skull repair plate is placed in the defect, the peripheral side of the frame 12 can contact the patient. The frame 12 is made of titanium alloy, so that the contact surface between the skull repair plate and the skull is titanium alloy. After the titanium alloy is combined with the bones in the body, it will not produce some parallelism reactions, and it has the characteristic of facilitating bone integration.

[0029] In another embodiment, see Figures 4 to 6 The edge of the frame 12 protrudes from the edge of the bone cement 2, and a trabecular bionic structure 13 is provided on the outside of the frame 12. The trabecular bionic structure 13 is located on the outside of the bone cement 2, so that when the skull repair plate is placed at the defect, the skull repair plate contacts the patient through the trabecular microporous bionic structure, and the contact surface is the trabecular microporous bionic structure. The trabecular microporous bionic structure is conducive to proliferation and growth, and sufficient strength and rigidity can be obtained after bone growth.

[0030] It should be noted that the trabecular microporous biomimetic structure is a biomaterial that mimics the structure and function of natural bone tissue and is manufactured using modern laboratory technology to achieve biosimilarity to bone tissue. It exhibits excellent biocompatibility, bioactivity, and biodegradability. Regarding biodegradability, the degradation time of biomimetic bone can be adjusted according to specific application needs. Regarding its osteogenesis, biomimetic bone can provide a suitable environment for bone cell growth, promoting their proliferation and differentiation. In terms of mechanical properties, biomimetic bone is comparable to natural bone, possessing sufficient strength and stiffness to meet diverse application requirements. Regarding bioactivity, biomimetic bone can stimulate the growth and differentiation of bone cells and promote the formation and repair of new bone.

[0031] In other possible embodiments, the substrate body 1 may also be made of a plate structure with holes, where the holes are drainage meshes 101 and may be square, circular, or other shapes.

[0032] To facilitate securing the skull repair plate to the defective area, in this embodiment, the additively manufactured personalized skull repair plate further includes a titanium nail fixing portion 3 disposed on the base plate body 1. The skull repair plate can be secured using the titanium nails and the titanium nail fixing portion 3. Specifically, the titanium nail fixing portion 3 includes a titanium nail fixing plate 31, which is fixedly connected to the base plate body 1 and extends outward from the side of the base plate body 1. The titanium nail fixing plate 31 is provided with a titanium nail fixing hole 32. During use, the titanium nail is passed through the titanium nail fixing hole 32 and secured to the defective area, thereby achieving installation and fixation of the skull repair plate.

[0033] In this embodiment, the base body 1 has multiple sides and is a polygonal structure. In order to ensure the fixation effect of the skull repair plate, at least one titanium nail fixing plate 31 is provided on each side of the base body 1 .

[0034] To reduce manufacturing costs and simplify installation, in one embodiment, a titanium nail fixing plate 31 is provided on each side of the base body 1. The titanium nail fixing plate 31 is located in the center of the side of the base body 1. During use, only one titanium nail needs to be driven into each side of the base body 1 to fix the skull repair plate. Of course, in other embodiments, more than one titanium nail fixing plate 31 may be provided on each side of the base body 1.

[0035] Operation process:

[0036] 1. Perform 3D digital modeling on the patient's data based on the CT data provided by the hospital to obtain information such as the size, location, and shape of the patient's skull defect.

[0037] 2. Design a personalized skull repair plate based on the defective part to ensure that the skull repair plate completely fits the defective part, and design a trabecular structure in the part that contacts the bone tissue.

[0038] 3. Design two parts of bone cement to combine with the personalized titanium alloy composite skull repair plate, and design a bone cement molding template according to the shape of the personalized skull repair plate.

[0039] 4. Use 3D printing technology and 3D metal printing technology to shape the bone cement molding template and personalized skull repair plate.

[0040] 5. Assemble the bone cement shaping guide plate and the personalized skull repair plate, and pour bone cement for shaping. After the bone cement 2 is completely solidified and formed, the guide plate can be removed to form a titanium alloy bone cement composite skull repair plate.

[0041] The present invention is provided with a base plate body 1 and bone cement 2. The bone cement 2 is wrapped around the base plate body 1 and forms an integral body with the base plate body 1, so that the skull plate has good strength. The base plate body 1 serves as the skeleton of the skull plate, and the bone cement 2 is wrapped around the outside of the base plate body 1, avoiding direct contact between the metal base plate body 1 with good thermal conductivity and the patient, making up for the insufficient strength of the bone cement 2 while avoiding discomfort to the patient caused by excessive heat conduction of the metal; the bone cement 2 is cast and formed by a mold, which is conducive to improving the fit between the skull plate and the contact part of the patient. Its shape is determined according to the pre-designed mold, which can ensure the patient's comfort and stability of wearing.

[0042] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A personalized skull repair plate based on additive manufacturing, characterized in that: include: A substrate body, wherein the substrate body is provided with a plurality of drainage mesh holes; as well as, Bone cement, which is cast into shape by a mold and wrapped around the base body, and the shape of the bone cement is the same as that of the base body; The substrate body is a titanium mesh plate, and the substrate body includes a mesh body and a frame body, and the frame body is arranged around the edge of the mesh body; the mesh body includes a plurality of crisscross ribs, and the drainage mesh holes are formed between the plurality of crisscross ribs, and the drainage mesh holes are square holes.

2. The personalized skull repair plate based on additive manufacturing according to claim 1, characterized in that: The edge of the frame is aligned with the edge of the bone cement.

3. The personalized skull repair plate based on additive manufacturing according to claim 1, characterized in that: The edge of the frame protrudes from the edge of the bone cement, and a trabecular bionic structure is provided on the outside of the frame, and the trabecular bionic structure is located on the outside of the bone cement.

4. The personalized skull repair plate based on additive manufacturing according to claim 1, characterized in that: The personalized skull repair plate based on additive manufacturing further includes a titanium nail fixing portion arranged on the base plate body.

5. The personalized skull repair plate based on additive manufacturing according to claim 4, characterized in that: The titanium nail fixing portion includes a titanium nail fixing plate, and the titanium nail fixing plate is provided with a titanium nail fixing hole.

6. The personalized skull repair plate based on additive manufacturing according to claim 5, characterized in that: The base plate body has a plurality of side edges, and at least one titanium nail fixing plate is provided on each side edge of the base plate body.

7. The personalized skull repair plate based on additive manufacturing according to claim 6, characterized in that: A titanium nail fixing plate is provided on each side of the substrate body, and the titanium nail fixing plate is provided in the center of the side of the substrate body.

8. The personalized skull repair plate based on additive manufacturing according to claim 7, characterized in that: The titanium nail fixing plate is extended outward from the side of the base plate body.

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