Spliced skull bone plate
Through the design of spliced skull bone plates, the use of PEEK material and three-dimensional CT reconstruction technology, combined with metal connecting plates, sockets and screw fixation, the problem of insufficient strength at the connection of existing skull repair materials is solved, and precise matching with the skull and efficient surgery are achieved.
Patent Information
- Application Number
- CN202422303668.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-09-20
AI Technical Summary
Existing skull repair materials lack strength at the joints, making it difficult to precisely match the skull, increasing surgical time and costs and potentially affecting brain tissue.
The spliced skull bone plate made of PEEK material is designed using 3D CT reconstruction technology. It is fixed with slots and screws connecting the connecting plate and the plate body, and combined with a metal plate to improve the connection strength and achieve precise integration with the skull.
It achieves precise matching between skull repair materials and skull, reduces operation time, lowers operation risks, and improves operation success rate and postoperative effects.
Smart Images
Figure CN223350302U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a prosthesis for skull repair surgery, in particular to a spliced skull bone plate. Background Art
[0002] Nowadays, due to factors such as the increasing number of traffic accidents, increasingly unsafe living environments, unhealthy diets, and the widespread aging population, the incidence of craniocerebral trauma, increased intracranial pressure, stroke, and intracranial and skull-related tumors is increasing year by year. Compared to conservative medical treatment, decompressive craniectomy is more meaningful. Due to the change in the shape of the skull defect, the scalp is affected by atmospheric pressure, causing it to indent and compress brain tissue. Cranioplasty is a common neurosurgery procedure that addresses problems such as abnormal cerebral blood supply, insufficient or obstructed cerebrospinal fluid circulation, and brain pressure caused by skull defects.
[0003] Currently, titanium mesh and PEEK prostheses are commonly used in clinical practice. Previous reconstructive surgeries typically involved doctors manually hammering out a titanium alloy mesh based on the size and shape of the patient's defect, either before or during surgery. The mesh was then compared on the patient's head and repeatedly reshaped and cut until it met the requirements of the defect. The mesh was then secured with screws. This required doctors to create the prosthesis as quickly as possible on the operating table based on the shape of the patient's skull defect. However, since the shape of each patient's skull defect is unique, the titanium alloy repair material is difficult to form and requires repeated shaping during surgery, which increases operative time. Furthermore, repeated cutting of the titanium alloy mesh weakens its strength, increasing the use of titanium alloy screws and, consequently, the cost of the surgery. While CT three-dimensional prosthesis can be used, the titanium mesh can only cover the skull and cannot fit within it, which can have a certain impact on the soft tissue of the scalp. In severe cases, the tension of the titanium mesh can expose it to the outside of the scalp. Furthermore, due to the excellent thermal conductivity of metal materials, the temperature of the external environment can have a certain impact on the patient's brain.
[0004] Polyetheretherketone (PEEK) is a special polymer material that can be used as a raw material for implants. Although PEEK prostheses can solve some of the drawbacks of titanium metal materials compared to titanium mesh, they also have many defects. When used for skull defect repair, due to the limited size of the raw materials, it is impossible to produce extra-large skull prostheses; when the skull defect is irregular and difficult to machine into one piece, the bone plates need to be spliced. The commonly used connection method is to connect with titanium plates and screws. Under this connection method, the strength of the connection position is very poor, which poses a huge risk in clinical practice.
[0005] For this reason, the structure of the existing skull prosthesis can be further improved. Utility Model Content
[0006] The technical problem to be solved by the utility model is to provide a spliced skull bone plate with a firm connection and better strength at the joint position in response to the above-mentioned prior art.
[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a spliced skull bone plate, comprising a first plate body and a second plate body made of PEEK material, the first plate body and the second plate body being spliced together to form a complete bone plate that matches the shape of the missing skull, the first plate body being provided with a plurality of first release holes for releasing intracranial pressure, the second plate body being provided with a plurality of second release holes for releasing intracranial pressure, one side surface of the first plate body being a first splicing surface, and one side surface of the second plate body being a second splicing surface; it is characterized in that: a first concave plug-in groove is provided on the first splicing surface, a second plug-in groove is provided on the second splicing surface, and a connecting plate is further provided, one side of the connecting plate is inserted into and fixed in the first plug-in groove, and the other side of the connecting plate is inserted into and fixed in the second plug-in groove.
[0008] In order to achieve the fixation of the connecting plate and the first plug-in slot, the connecting plate and the first plug-in slot are tightly matched.
[0009] In order to achieve the fixation of the connecting plate and the second plug-in slot, the connecting plate and the second plug-in slot are tightly matched.
[0010] It is fixed by a tight fit, without the need for additional fixings, but of course it requires higher processing accuracy.
[0011] To achieve the fixing of the connecting plate to the first inserting slot, the connecting plate is fixed in the first inserting slot by a plurality of first screws. The screw fixing structure is the simplest and can reduce the requirements for processing accuracy.
[0012] To achieve screw fastening, the top wall of the first insertion slot is provided with a plurality of first countersunk holes, the bottom wall of the first insertion slot is provided with a plurality of first small holes, and the connecting plate is provided with a plurality of first threaded holes. The first screws are threadedly connected to the first threaded holes after passing through the first countersunk holes. The countersunk holes for the screws are not concealed within the interior and protrude outwards. The first small holes serve to vent air, facilitating screw insertion.
[0013] To achieve the connection plate and the first insertion slot fixed, the connection plate is fixed in the second insertion slot by a plurality of second screws. The screw fixing structure is the simplest and can reduce the processing accuracy requirements.
[0014] To achieve screw fastening, the top wall of the second insertion slot is provided with multiple second countersunk holes, the bottom wall of the second insertion slot is provided with multiple second small holes, and the connecting plate is provided with multiple second threaded holes. The second screws pass through the second countersunk holes and then threadably engage with the second threaded holes. The countersunk holes for the screws are not concealed within them and protrude outwards. The second small holes serve to vent air, facilitating screw insertion.
[0015] In order to ensure better integrity of the first plate body and the second plate body after being spliced together, the first splicing surface and the second splicing surface are bonded to each other.
[0016] To facilitate fixing the bone plate to the skull, a first recessed mounting groove is provided on the arched surface of the first plate body for inserting a fixing plate therein, and a second recessed mounting groove is provided on the arched surface of the second plate body for inserting a fixing plate therein.
[0017] Due to surgical needs, a concave notch is generally formed on the side of the skull window. To ensure that the bone plate matches the shape of the skull window, the side wall of the above-mentioned complete bone plate has a lateral convex ear.
[0018] Compared with the existing technology, the advantages of the present invention are: the structure is formed by splicing a first plate and a second plate made of PEEK material together, and uses three-dimensional CT reconstruction technology to simulate the natural shape of the skull based on the patient's skull defect. After CT data processing, medical three-dimensional reconstruction, surface mapping of the skull's natural curve, computer graphics and image-assisted design, and high-precision laser melting 3D printing, the repair piece is precisely combined with the defect area. Importantly, the connection between the first and second plates is achieved by plugging and fixing the connecting plate with the connecting plate. The connecting plate can be made of a stronger metal plate, and the presence of the metal plate makes the connection position stronger. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of the present utility model (top view);
[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of an embodiment of the present utility model (looking from above);
[0021] Figure 3 A cross-sectional view of an embodiment of the present utility model;
[0022] Figure 4 The three-dimensional decomposition of the embodiment of the utility model Figure 1 ;
[0023] Figure 5 The three-dimensional decomposition of the embodiment of the utility model Figure 2 . DETAILED DESCRIPTION
[0024] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.
[0025] like Figures 1 to 5 Shown is the first embodiment of the present utility model.
[0026] A spliced skull bone plate includes a first plate body 1 and a second plate body 2 made of PEEK material. The first plate body 1 and the second plate body 2 are spliced together to form a complete bone plate A that matches the shape of the missing skull. The first plate body 1 is provided with a plurality of first release holes 11 for releasing intracranial pressure, and the second plate body 2 is provided with a plurality of second release holes 21 for releasing intracranial pressure. One of the side surfaces of the first plate body 1 is a first splicing surface 1a, and one of the side surfaces of the second plate body 2 is a second splicing surface 2a.
[0027] The first splicing surface 1a is provided with a concave first plug-in slot 12, the second splicing surface 2a is provided with a second plug-in slot 22, and also includes a connecting plate 3, one side of the connecting plate 3 is inserted and fixed in the first plug-in slot 12, and the other side of the connecting plate 3 is inserted and fixed in the second plug-in slot 22.
[0028] In order to achieve the fixation of the connecting plate 3 and the plug-in slot, this embodiment adopts the following method: one side of the connecting plate 3 is fixed in the first plug-in slot 12 by a plurality of first screws 4a. The top wall of the first plug-in slot 12 is provided with a plurality of first countersunk holes 121, the bottom wall of the first plug-in slot 12 is provided with a plurality of first small holes 122, and the connecting plate 3 is provided with a plurality of first threaded holes 31. The first screws 4a pass through the first countersunk holes 121 and are threadedly connected to the first threaded holes 31. The other side of the connecting plate 3 is fixed in the second plug-in slot 22 by a plurality of second screws 4b. The top wall of the second plug-in slot 22 is provided with a plurality of second countersunk holes 221, the bottom wall of the second plug-in slot 22 is provided with a plurality of second small holes 222, and the connecting plate 3 is provided with a plurality of second threaded holes 32. The second screws 32 pass through the second countersunk holes 221 and are threadedly connected to the second threaded holes 32.
[0029] Of course, the connecting plate 3 can also be fixed to the plug slot in other ways, such as one side of the connecting plate 3 is tightly fitted with the first plug slot 12 and the other side of the connecting plate 3 is tightly fitted with the second plug slot 22 .
[0030] The first and second joint surfaces 1a and 2a are in contact with each other. The arched surface of the first plate 1 is provided with a first recessed mounting groove 1b for the fixing plate to be inserted into, and the arched surface of the second plate 2 is provided with a second recessed mounting groove 2b for the fixing plate to be inserted into. The sidewalls of the complete bone plate A have lateral protruding ears 13.
[0031] This structure is formed by splicing a first plate 1 and a second plate 2 made of PEEK material. Using three-dimensional CT reconstruction technology, the natural shape of the skull is simulated based on the patient's skull defect. After CT data processing, medical three-dimensional reconstruction, surface mapping of the skull's natural curves, and computer graphics-assisted design, high-precision laser melting 3D printing is used to achieve a precise combination of the repair piece and the defect area. Importantly, the connection between the first plate 1 and the second plate 2 is achieved by plugging and fixing the connecting plate 3 with the connecting plate 3. The connecting plate 3 can be made of a stronger metal plate, and the presence of the metal plate improves the strength of the connection position. The product uses three-dimensional CT reconstruction technology, which reduces unnecessary operations by the doctor during surgery, greatly shortens the operation time, reduces surgical risks, and at the same time compensates for the various disadvantages of low strength at the splicing position, significantly improving the success rate of the operation and the postoperative effect.
[0032] It should be noted that in the description of this embodiment, the terms "front, back", "left, right", "up, down", etc. indicating directions or positional relationships are all based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "install", "connect", and "connected" should be understood in a broad sense. For example, they can be fixed connections, detachable connections, or integral connections; they can be directly connected, or indirectly connected through an intermediate medium, or they can be internal connections between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
Claims
1. A spliced skull bone plate, comprising a first plate body (1) and a second plate body (2) made of PEEK material, wherein the first plate body (1) and the second plate body (2) are spliced together to form a complete bone plate (A) that matches the shape of the missing skull, the first plate body (1) is provided with a plurality of first release holes (11) for releasing intracranial pressure, the second plate body (2) is provided with a plurality of second release holes (21) for releasing intracranial pressure, one side surface of the first plate body (1) is a first splicing surface (1a), and one side surface of the second plate body (2) is a second splicing surface (2a); characterized in that: The first splicing surface (1a) is provided with a first concave plug-in slot (12), the second splicing surface (2a) is provided with a second plug-in slot (22), and further comprises a connecting plate (3), one side of the connecting plate (3) is inserted into and fixed in the first plug-in slot (12), and the other side of the connecting plate (3) is inserted into and fixed in the second plug-in slot (22).
2. The spliced skull bone plate according to claim 1, characterized in that: The connecting plate (3) is tightly fitted into the first plug-in slot (12).
3. The spliced skull bone plate according to claim 1, characterized in that: The connecting plate (3) is tightly fitted into the second plug-in slot (22).
4. The spliced skull bone plate according to claim 1, characterized in that: The connecting plate (3) is fixed in the first plug-in slot (12) by a plurality of first screws (4a).
5. The spliced skull bone plate according to claim 4, characterized in that: The top wall of the first plug-in slot (12) is provided with a plurality of first countersunk holes (121), the bottom wall of the first plug-in slot (12) is provided with a plurality of first small holes (122), the connecting plate (3) is provided with a plurality of first threaded holes (31), and the first screws (4a) pass through the first countersunk holes (121) and are threadedly connected to the first threaded holes (31).
6. The spliced skull bone plate according to claim 1, characterized in that: The connecting plate (3) is fixed in the second plug-in slot (22) by a plurality of second screws (4b).
7. The spliced skull bone plate according to claim 6, characterized in that: The top wall of the second plug-in slot (22) is provided with a plurality of second countersunk holes (221), the bottom wall of the second plug-in slot (22) is provided with a plurality of second small holes (222), the connecting plate (3) is provided with a plurality of second threaded holes (32), and the second screws (4b) pass through the second countersunk holes (221) and are threadedly connected to the second threaded holes (32).
8. The spliced skull bone plate according to claim 1, characterized in that: The first joint surface (1a) and the second joint surface (2a) are in contact with each other.
9. The spliced skull bone plate according to claim 1, characterized in that: A first concave mounting groove (1b) for inserting a fixing plate is provided on the arched surface of the first plate body (1), and a second concave mounting groove (2b) for inserting a fixing plate is provided on the arched surface of the second plate body (2).
10. The spliced skull bone plate according to claim 1, characterized in that: The side wall of the complete bone plate (A) has a lateral convex lug (13).