Thickness-adjustable skull restoration

Abstract

The utility model relates to a thickness-adjustable skull restoration body which is characterized by comprising an upper restoration piece and a lower restoration piece which are made of PEEK materials, the lower restoration piece is arranged below the upper restoration piece, the upper restoration piece is provided with a plurality of nail holes which penetrate through in the thickness direction and are used for rod portions of first screws to movably penetrate through, and the lower restoration piece is provided with a plurality of second nail holes which penetrate through in the thickness direction. The rod parts of the first screws penetrate through the corresponding nail holes and then are in threaded connection with the lower repairing piece, a distance is formed between the lower repairing piece and the upper repairing piece, the inner ends of the fixing plates are fixed to the edge of the upper repairing piece, and the outer ends of the fixing plates extend out of the upper repairing piece to be fixed to the skull. By selecting the first screws with different lengths, the distance between the lower repairing piece and the upper repairing piece can be changed, and then the overall thickness of the repairing body is adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of repair bodies for skull repair surgery, in particular to a kind of adjustable thickness skull repair body. BACKGROUND

[0002] The cause of skull defect can be caused by trauma or surgery, and if skull repair surgery is not performed, it can cause symptoms such as scalp depression, dizziness and headache, and the patient can become emotionally tense and irritable. Skull repair is a common brain surgery to solve the problems of abnormal brain blood supply, insufficient or impaired cerebrospinal fluid circulation, and brain compression caused by skull defect. It can also improve the patient's appearance and restore their confidence.

[0003] There are two types of titanium mesh and polyether ether ketone (PEEK) repair bodies commonly used in clinical practice. These two materials have their own advantages and disadvantages. For example, a Chinese patent application for invention with application number CN202311399217.X (publication number CN117179972A) discloses a skull repair body, a preparation method and a repair device. The skull repair body includes a solid part and a porous structure. The outer edge of the middle layer of the solid part forms a concave structure and is located between the outer layer and the inner layer. The porous structure is formed in the concave structure, and the porous structure abuts the residual surface of the defect bone window. The porous structure guides the host bone to grow into the pores, and a mechanical interlock is formed between them, which is beneficial to the long-term effective fixation of the skull repair body. This solves the problem of the mechanical strength of the skull repair body being greatly weakened by the overall porous structure, and also avoids the problem of loosening and failure that may exist in the traditional fixing method.

[0004] However, the thickness of the existing skull repair body cannot be adjusted. If it is too thick, the doctor may need to perform bone grinding, making the surgery more complex. Since the thickness is fixed, when the intracranial pressure rises, the intracranial pressure cannot be automatically reduced.

[0005] Therefore, the structure of the existing PEEK material skull repair body can be further improved. UTILITY MODEL CONTENT

[0006] The utility model solves the technical problem of the above-mentioned prior art by providing a skull repair body with adjustable thickness and reasonable structure.

[0007] The technical scheme that the utility model solves above technical problem adopts: A kind of adjustable thickness skull prosthesis, it is characterized by: including by PEEK material made upper repair piece and lower repair piece, the lower repair piece is located below upper repair piece, multiple nail holes are opened on upper repair piece, and the rod portion of first screw is movably passed through, the rod portion of first screw is connected with lower repair piece after being passed through corresponding nail hole, lower repair piece and upper repair piece have spacing, and it further includes multiple fixed plates, the inner end of fixed plate is fixed on the brim of upper repair piece, and the outer end of fixed plate extends out of upper repair piece to be fixed with skull.

[0008] Further improvement, multiple through holes are opened on the inner surface and outer surface of the above-mentioned upper repair piece and lower repair piece along the thickness direction. The upper repair piece and the lower repair piece are provided with multiple through holes, which can effectively reduce the postoperative risk for patients with increased intracranial pressure, and the micropores can promote the combination of the prosthesis and soft tissue.

[0009] As an improvement, the edge of the top surface of the above-mentioned upper repair piece is provided with multiple concave parts, and the inner end of the fixed plate is hidden in and fixed in the concave part. In this way, the fixed plate does not protrude too much from the top surface of the upper repair piece,

[0010] Because the top surface of the upper repair piece is provided with multiple concave parts, the position of the upper repair piece will be thinned, which will affect the strength of the local position of the upper repair piece. To compensate for this defect, the bottom surface of the above-mentioned upper repair piece is provided with a first lower convex part corresponding to the concave part. The first lower convex part supplements the thickness at the position of the concave part, which compensates for the defect caused by the concave part.

[0011] To facilitate the fixation of the fixed plate to the upper repair piece, as a preferred embodiment, the inner end of the above-mentioned fixed plate is provided with a first perforation for the second screw to pass through, and the outer end of the fixed plate is provided with a second perforation for the second screw to pass through. In this way, the second screw can be directly screwed into the upper repair piece through the first perforation, and the second screw can be fixed to the skull through the second perforation.

[0012] To further facilitate the fixation of the fixed plate to the upper repair piece, the bottom surface of the above-mentioned fixed plate is provided with a positioning column extending downward in a lower-small-and-upper-large conical shape, and the top surface of the upper repair piece is provided with a positioning hole for positioning and fitting of the positioning column. When assembling, the positioning column and the positioning hole are tightly fitted to achieve the pre-positioning of the fixed plate, which facilitates the fixation of the fixed plate to the upper repair piece through the screw.

[0013] To prevent the screw from penetrating the lower repair piece, the bottom surface of the above-mentioned lower repair piece is provided with a second lower convex part corresponding to the nail hole.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] 1. The rod of the first screw is screwed with the lower repair sheet after passing through the corresponding nail hole, the lower repair sheet and the upper repair sheet have a spacing, by selecting different lengths of the first screw, the spacing size between the lower repair sheet and the upper repair sheet can be changed, and then the thickness of the whole repair body is adjusted, since the thickness of the whole repair body is adjustable, the doctor can adjust the thickness of the skull repair body according to the specific condition after craniotomy, the adaptability is stronger, bone grinding is not needed, and the operation is simplified in some cases.

[0016] 2. Since the lower repair sheet and the upper repair sheet have a spacing, compared with the same thickness repair body, there is the advantage of light weight.

[0017] 3. Since the rod of the first screw passes through the nail hole, the lower repair sheet can drive the first screw to move relative to the upper repair sheet, when the intracranial pressure is too high, the thickness will automatically become smaller within a certain range, so as to reduce the intracranial pressure.

[0018] 4. The fixing plate is provided, the doctor can directly fix (also need a screw), and the operation steps are reduced; if the fixing plate is not needed, it can be directly taken out and fixed by using other fixing plates BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is a front perspective structural schematic view of an embodiment of the utility model.

[0020] Fig. 2 It is a back perspective structural schematic view of an embodiment of the utility model.

[0021] Fig. 3 It is a perspective exploded view of an embodiment of the utility model.

[0022] Fig. 4 It is a perspective view of the fixing plate in the embodiment of the utility model. DETAILED DESCRIPTION

[0023] The utility model is further described in detail in combination with the embodiment of the drawings.

[0024] As shown in the figure, it is the first embodiment of the utility model. Figs. 1-4

[0025] ​The application discloses an adjustable thickness skull repairing body, which comprises an upper repairing sheet 1 and a lower repairing sheet 2 made of PEEK material (polyether ether ketone), the lower repairing sheet 2 is arranged below the upper repairing sheet 1, a plurality of nail holes 11 are formed in the upper repairing sheet 1 and are penetrated along the thickness direction, the rod part of a first screw 4a is movably arranged through the nail holes 11, the rod part of the first screw 4a is threadedly connected with the lower repairing sheet 2 after being arranged through the corresponding nail hole 11, the lower repairing sheet 2 and the upper repairing sheet 1 have a spacing D, a plurality of fixing plates 3 are arranged, the inner end of the fixing plate 3 is fixed to the edge of the upper repairing sheet 1, and the outer end of the fixing plate 3 extends outwards from the upper repairing sheet 1 and is used for being fixed with the skull.

[0026] A plurality of flow-through holes 5 are formed in the upper repairing sheet 1 and the lower repairing sheet 2 and penetrate the inner surface 1a and the outer surface 1b along the thickness direction.

[0027] The edge of the top surface of the upper repairing sheet 1 is provided with a plurality of concave parts 12, the inner end of the fixing plate 3 is hidden in and fixed to the concave part 12, the bottom surface of the upper repairing sheet 1 is provided with a first lower convex part 13 corresponding to the concave part 12, the inner end of the fixing plate 3 is provided with a first perforation 31 through which a second screw 4b is arranged, and the outer end of the fixing plate 3 is provided with a second perforation 32 through which the second screw 4b is arranged.

[0028] The bottom surface of the fixing plate 3 is provided with a positioning column 33 which extends downwards and is in a shape of a lower small and upper large cone, and the top surface of the upper repairing sheet 1 is provided with a positioning hole 14 which is arranged in a matching mode with the positioning column 33.

[0029] The bottom surface of the lower repairing sheet 2 is provided with a second lower convex part 21 corresponding to the nail hole 11.

[0030] Through three-dimensional CT reconstruction technology, according to the condition of the skull defect of the patient, the natural shape of the skull is simulated, through CT data processing, medical three-dimensional reconstruction, surface drawing of the natural surface of the skull, auxiliary design of computer graphics image, the upper repair piece 1 and the lower repair piece 2 can be 3D printed or machined, and then the precise combination of the upper repair piece 1 and the lower repair piece 2 with the defect part is realized. Because the rod part of the first screw 4a is screwed with the lower repair piece 2 after penetrating through the corresponding nail hole 11, the lower repair piece 1 and the upper repair piece 2 have a spacing D, by selecting first screws 4a of different lengths, the spacing D between the lower repair piece 2 and the upper repair piece 1 can be changed, and then the thickness of the whole repair body can be adjusted. Because the thickness of the whole repair body can be adjusted, the doctor can adjust the thickness of the skull repair body according to the specific situation after craniotomy, which is more adaptive, does not need to grind the bone, and simplifies the operation in some cases. Because the lower repair piece 2 and the upper repair piece 1 have a spacing D, compared with the same thickness repair body, it has the advantage of light weight. Because the rod part of the first screw 4a penetrates through the nail hole 11, the lower repair piece 2 can drive the first screw 4a to move relative to the upper repair piece 1, when the intracranial pressure is too high, the thickness will automatically decrease within a certain range, thereby reducing the intracranial pressure.

[0031] It should be noted that in the description of the present embodiment, the terms "front, rear, left, right, inner, outer, upper and lower" indicate the orientation or positional relationship shown in the drawings, and are only used for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

Claims

1. An adjustable thickness cranial repair, characterized by: The application relates to a skull repair device, which comprises an upper repair sheet (1) and a lower repair sheet (2), the lower repair sheet (2) being arranged below the upper repair sheet (1), a plurality of nail holes (11) being formed in the upper repair sheet (1) and penetrating the upper repair sheet (1) along the thickness direction, the rod part of a first screw (4a) being movably arranged in the corresponding nail hole (11), the rod part of the first screw (4a) being threadedly connected with the lower repair sheet (2) after penetrating the corresponding nail hole (11), the lower repair sheet (2) and the upper repair sheet (1) being spaced apart by a distance (D), and a plurality of fixing plates (3) being arranged on the edge of the upper repair sheet (1) and extending outwardly from the upper repair sheet (1) to be fixed with the skull.

2. The adjustable thickness cranial repair of claim 1, wherein: A plurality of flow-through holes (5) are formed in the upper repair sheet (1) and the lower repair sheet (2) and penetrating the inner surface (1a) and the outer surface (1b) along the thickness direction.

3. The adjustable thickness cranial repair of claim 1, wherein: A plurality of concave parts (12) are arranged on the edge of the top surface of the upper repair sheet (1), and the inner end of the fixing plate (3) is arranged in and fixed to the concave part (12).

4. The adjustable thickness cranial repair of claim 3, wherein: A first lower convex part (13) corresponding to the concave part (12) is arranged on the bottom surface of the upper repair sheet (1).

5. The adjustable thickness cranial repair of claim 3, wherein: The inner end of the fixing plate (3) is provided with a first through hole (31) for the second screw (4b), and the outer end of the fixing plate (3) is provided with a second through hole (32) for the second screw (4b).

6. The adjustable thickness cranial repair of claim 3, wherein: The bottom surface of the fixing plate (3) is provided with a positioning column (33) extending downwardly and tapering from small to large, and the top surface of the upper repair sheet (1) is provided with a positioning hole (14) for the positioning column (33).

7. The adjustable thickness cranial repair of claim 1, wherein: The bottom surface of the lower repair sheet (2) is provided with a second lower convex part (21) corresponding to the nail hole (11).

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