Skull repair fixing connecting piece and skull repair system
By designing a skull repair fixing connection piece with central area A and thickness gradient area B, the problem that the skull repair piece in the prior art cannot fit the skull surface is solved, and the aesthetics and comfort of skull repair are achieved, and through long holes is achieved. Designed to adapt to children's cranial cavity changes, reducing postoperative risks.
Patent Information
- Application Number
- CN202323035687.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-09
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2033-11-09
AI Technical Summary
The existing skull repair and fixing connection sheets have the same overall thickness, which cannot effectively fit the autologous skull and the surface of the patch, affecting the comfort and aesthetics of the patient, and lacks expansion characteristics, which cannot adapt to the growth dynamic changes of the children's cranial cavity, which may lead to postoperative Skull patches fall off or skull deform.
A skull repair fixing connection piece is designed, including the central area A and the thickness gradient area B. The through hole is used to pass through the fixing nails. The thickness of the area A is greater than or equal to the maximum thickness of the thickness gradient area B. The thickness gradient area B is from the center. Area A gradually thins, adapts to the skull surface transitions and allows fixing nails to slide through long hole designs to accommodate changes in the skull cavity of children.
The natural transition between the connecting piece and the skull surface is achieved, which increases the aesthetics of skull repair and the comfort of the patient, reduces the risk of skull repair falling off and skull deformation after surgery, and adapts to the growth dynamic changes of the children's cranial cavity.
Smart Images
Figure CN222285692U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of medical supplies, and more specifically, to a skull repair fixing connecting piece and a skull repair system. Background Art
[0002] Skull defects caused by brain trauma and craniotomy require cranioplasty to avoid skull defect syndrome and secondary brain damage. Currently, commonly used skull repair bodies are mainly made of three-dimensional molding of suitable repair materials, including medical titanium alloys, titanium mesh, hydroxyapatite, polymethyl methacrylate, polyetheretherketone, etc., and are generally used together with fixing components such as skull locks, connecting plates and fixing nails during surgery. The fixing components simultaneously realize the fixed connection between the skull repair body and the patient's own skull.
[0003] The existing skull repair fixation connecting pieces usually have the same overall thickness, and cannot fit the surface of the autologous skull and the repair body well during use, which affects the patient's comfort and postoperative aesthetics.
[0004] In addition, current skull repair bodies do not have expansion characteristics, and expansion space is mainly achieved by fixing components. Fixing components are generally divided into two types: sliding fixation and rigid fixation. The skull lock is a sliding fixation method that can adapt to the dynamic changes in the growth of children's cranial cavity, but due to its structural characteristics, its flexibility during surgery is limited, which may cause damage to the intracranial structure, and insufficient fixing force may cause the skull repair body to fall off after surgery; rigid fixation generally uses a connecting plate with a fixing nail, which no longer has dynamic sliding characteristics after fixation. This fixation method cannot adapt to the dynamic changes in the growth of children's cranial cavity. Utility Model Content
[0005] In order to overcome at least one of the above-mentioned technical problems, the utility model provides a skull repair fixing connecting plate, which is used in conjunction with fixing nails to connect and fix the autologous skull and the skull repair body during skull repair shaping surgery. It can naturally transition with the surface of the autologous skull and the skull repair body, thereby increasing the aesthetics of the skull repair and the comfort of the patient.
[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a skull repair and fixation connecting plate, the connecting plate is provided with at least one through hole, and the connecting plate is divided into an area A and a thickness gradient area B surrounding the area A; the area A is the center point of the connecting plate or an area extending outward from the center point of the connecting plate to cover all the through holes; the thickness of the thickness gradient area B gradually becomes thinner from one end close to the area A to the edge end, and the minimum thickness of the area A is greater than or equal to the maximum thickness of the thickness gradient area B.
[0007] In the above technical solution, area A refers to the center point of the connecting piece, or the area extending outward from the center point of the connecting piece to cover all the through holes. Area A can be of any shape or size, where the size can be only one point, namely the center point of the connecting piece, or a certain area, such as forming a circular, square, elliptical or irregular area. The thickness gradient area B is the area outside area A and is located around area A. The thickness of the thickness gradient area B gradually becomes thinner from one end close to area A to the edge end, so that it can naturally transition with the surface of the autologous skull and the skull repair body, increasing the aesthetics of the skull repair and the comfort of the patient. The minimum thickness of area A is greater than or equal to the maximum thickness of the thickness gradient area B, so that the strength of area A is greater than that of the thickness gradient area B. The through hole is used for the fixing nails to pass through and connect with the autologous skull and the skull repair body.
[0008] Preferably, the thickness of the gradual thickness region B is in the range of 0.1-2 mm, and the thickness of the region A is in the range of 0.6-2 mm.
[0009] Preferably, at least one of the through holes is an elongated hole, such as an elongated circular hole, an oblong rectangular hole, etc.; the other through hole can be a round hole, a square hole, etc. The design of the elongated hole allows the fixing pin to slide in the elongated hole of the connecting plate to adapt to the changes in the cranial cavity under the growth and development of the child, reduce the deformation of the child's skull due to rigid fixation and limit the risk of brain development.
[0010] Preferably, the through hole is a straight through hole, that is, the inner diameter of the through hole in the vertical direction remains consistent.
[0011] Preferably, the through hole is a countersunk hole, and the countersunk hole is a conical countersunk hole or a platform countersunk hole. The countersunk hole may also have a change in inner diameter in the vertical direction, which can hide the nail head of the fixing nail, so that the surface of the connecting plate remains flat after installation, thereby enhancing the patient's comfort and aesthetics.
[0012] Preferably, the length of the long hole is 1-25 mm, and the length of the long hole can be actually selected according to the subsequent growth space of the child's skull.
[0013] Preferably, the shortest distance between two adjacent through holes is 6-15 mm, which is actually a safe distance for the fixing pins to avoid the fixing pins being fixed to the edge of the autologous skull or skull repair body during installation, resulting in insufficient fixing strength.
[0014] Preferably, the bottom surface of the connecting piece is an arc surface, the center of the arc surface is located on the side away from the top surface of the connecting piece, and the radius K of the arc surface is 40-70 mm. The arc surface can better fit the surface of the skull repair body and the autologous skull, and its specific radius of curvature is determined according to the curvature of the patient's bone surface.
[0015] Preferably, the edge of the connecting piece is rounded, and the edge is smoother, which can avoid possible damage to the skull or other tissues caused by the connecting piece.
[0016] Preferably, the connecting sheet is made of metal or polymer, the metal may be titanium or titanium alloy; the polymer may be polyetheretherketone, polylactic acid, etc., preferably polyetheretherketone.
[0017] Preferably, the maximum width of the connecting piece is W1, the middle width of the connecting piece at the midline along the length direction is W2, and the maximum width W1 is greater than or equal to the middle width W2. When the maximum width W1 is greater than the middle width W2, it means that there is a gap in the middle of the connecting piece, which can save materials and increase the adaptability of the arc; when the maximum width W1 is equal to the middle width W2, the connecting piece is more complete as a whole and has higher strength. The width range of the maximum width W1 and the middle width W2 are both 5-10mm, and the length L of the connecting piece is 15-50mm.
[0018] The utility model also provides a skull repair system, including a skull repair body and any of the skull repair fixing connecting pieces described above. The skull repair fixing connecting piece can be formed as one piece with the skull repair body, or it can be split, and can be selected according to the specific use situation. When the two are formed as one piece, the skull repair fixing connecting piece is provided with at least one through hole, and area A is an area covering the through hole formed by extending outward from the center point of the connecting piece, and one end of area A extends to the edge of the skull repair body and is directly formed as one piece with the skull repair body, and the thickness gradient area B is the peripheral area of area A; when in use, a fixing nail is used to pass through the through hole in area A to fix the connecting piece to the autologous skull, so that the connection and fixation of the autologous skull and the skull repair body can be achieved. When the two are separate, the connecting piece is provided with at least two through holes, area A is the center point of the connecting piece or an area extending outward from the center point of the connecting piece and covering all the through holes, and the thickness gradient area B is the peripheral area of area A; when in use, fixing nails are used to pass through at least two through holes in area A to fix the connecting piece to the skull repair body or the autologous skull respectively, so as to achieve the connection and fixation of the skull repair body and the autologous skull.
[0019] Compared with the prior art, the beneficial effects of the utility model are:
[0020] The skull repair fixation connecting piece includes an area A and a thickness gradient area B surrounding the area A. The thickness of the thickness gradient area B gradually becomes thinner from one end close to the area A to the edge end, so that the connecting piece presents a certain thickness change. This allows the connecting piece to meet the mechanical strength requirements while more naturally transitioning to the surface of the autologous skull and the skull repair body, thereby increasing the aesthetics of the skull repair and the comfort of the patient.
[0021] At least one through hole of the skull repair fixation connecting plate is a long hole. As the cranial cavity changes with the growth and development of the child, the design of the long hole allows the fixing pin and the fixing connecting plate to slide within a certain range to adapt to the changes in the cranial cavity as the child grows and develops, thereby reducing the deformation of the child's skull due to rigid fixation and limiting the risk of brain development. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a structural schematic diagram of Embodiment 1 of a skull repair fixing connecting piece of the utility model;
[0023] Figure 2 It is a schematic cross-sectional structure diagram of Example 1 of the utility model;
[0024] Figure 3 It is a structural schematic diagram of a second embodiment of a skull repair fixing connecting piece of the utility model;
[0025] Figure 4 It is a structural schematic diagram of a through hole of a skull repair fixing connecting piece of the utility model;
[0026] Figure 5 It is a structural schematic diagram of another embodiment of a through hole of a skull repair fixing connecting piece of the utility model.
[0027] Figure 6 It is a structural schematic diagram of a third embodiment of a skull repair fixing connecting piece of the utility model;
[0028] Figure 7 This is a structural schematic diagram of another embodiment of a through hole of a skull repair fixing connecting piece of the utility model
[0029] Figure 8 It is a structural schematic diagram of an integrally formed skull repair system of the utility model;
[0030] Fig. 9 It is a structural schematic diagram of a split type skull repair system of the utility model. DETAILED DESCRIPTION
[0031] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.
[0032] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0033] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:
[0034] Example 1
[0035] like Figure 1-2 The figure shows an embodiment 1 of a skull repair fixing connecting piece, the connecting piece is provided with at least one through hole 1. In this embodiment, two through holes 1 are provided and are respectively located on both sides of the center of the connecting piece. The connecting piece is divided into region A and a thickness gradient region B surrounding region A. The thickness of the thickness gradient region B gradually becomes thinner from one end close to region A to the edge end, and the minimum thickness of region A is greater than the maximum thickness of the thickness gradient region B. Specifically, region A is the center point, and the thickness of the connecting piece gradually becomes thinner from the center point to the edge. At this time, the transition between the connecting piece and the surface of the autologous skull and the skull repair body is natural, and the aesthetics of the skull repair and the comfort of the patient are good. The thickness of region A, that is, the center point, is 2 mm, the maximum thickness of the thickness gradient region B is less than 2 mm, and the minimum thickness is 0.1 mm.
[0036] In this embodiment, one through hole 1 is a long hole, the other through hole 1 is a round hole, and both through holes are straight through holes. Specifically, the length of the long hole is 5 mm; the shortest distance HD between two adjacent through holes 1 is 10 mm, which is actually the safe distance of the fixing pins. The distance is used to keep the nail insertion positions on the skull repair body and the autologous skull at a suitable distance to avoid the fixing pins being fixed on the edge of the autologous skull or the skull repair body during installation, resulting in insufficient fixing strength.
[0037] Furthermore, the bottom surface of the connecting piece is an arc surface, the center of the arc surface is located on the side away from the top surface of the connecting piece, and the radius K of the arc surface is 45 mm. The arc surface can fit more closely with the surface of the skull repair body and the autologous skull, and its specific radius of curvature is determined according to the curvature of the patient's bone surface; the edge of the connecting piece is set to be rounded, and the edge is smoother, which can avoid possible damage to the skull or other tissues caused by the connecting piece.
[0038] In addition, the skull repair fixing connecting piece of this embodiment is made of titanium.
[0039] Beneficial effects of this embodiment:
[0040] The thickness of the thickness gradient region B gradually becomes thinner from one end close to region A to the edge end, and can naturally transition with the surface of the autologous skull and the skull repair body, thereby increasing the aesthetics of the skull repair and the comfort of the patient. In this embodiment, region A is only the center point, and the thickness of the entire connecting piece actually gradually becomes thinner from the center point to the edge, so that the entire connecting piece can more naturally transition with the surface of the autologous skull and the skull repair body, thereby increasing the aesthetics of the skull repair and the comfort of the patient.
[0041] The long hole design allows the fixing pin to slide in the long hole of the connecting piece to adapt to the changes in the cranial cavity as the child grows and develops, reducing the risk of deformation of the child's skull due to rigid fixation and limiting brain development. Compared with the existing active fixation method, the skull lock, the connecting piece with the long hole is only on the surface of the skull and the skull repair body and does not occupy the skull, which is more flexible in the choice of fixing position and safer in clinical use; compared with the fixation method of the skull lock that is clamped by the upper and lower flat plates, the connecting piece is used with the fixing pin, which is more secure in fixing force and reduces the risk of the skull repair body falling off after surgery.
[0042] Example 2
[0043] like Figure 3 The figure shows an embodiment 2 of a skull repair and fixation connecting plate, in which two through holes 1 are provided on the connecting plate, and the connecting plate is divided into a region A located at the center of the connecting plate and a thickness gradient region B surrounding region A; the thickness of the thickness gradient region B gradually becomes thinner from one end close to region A to the edge end. Region A is the region covering all the through holes 1. Starting from the edge of region A, the thickness of the connecting plate gradually becomes thinner, and at this time, the thickness gradient region B has a natural transition with the autologous skull and the bone surface of the repair prosthesis, and the aesthetics of the skull repair and the comfort of the patient are good. In this embodiment, the thickness range of the connecting plate is 0.1-2mm, wherein the thickness of region A is 2mm, and the maximum thickness of the thickness gradient region B is 2mm, and the minimum thickness is 0.1mm. The maximum thickness of the thickness gradient region B is consistent with the thickness of region A, and the transition between the two regions is more natural. Figure 3 As shown, the area within the dotted line is area A, and the area outside the dotted line is area B with gradually changing thickness.
[0044] In this embodiment, the two through holes 1 are both long holes. Specifically, the length of the long holes is 7 mm. The shortest distance HD between two adjacent through holes 1 is 6 mm. The shortest distance is actually the safe distance of the fixing pins. The purpose of this distance is to keep the nail insertion positions on the repair prosthesis and the autologous skull at a suitable distance to avoid the fixing pins being fixed on the edge of the autologous skull or the repair prosthesis during installation, resulting in insufficient fixation strength.
[0045] Specifically, two through holes 1 are located in region A. Region A in this embodiment is waist-shaped. Through hole 1 is the position for fixing nails to pass through, and is also the place where stress occurs. Region A has a greater thickness and better strength. The fixing nail passes through the through hole 1 located in region A to connect with the autologous skull and the skull repair body, which can improve the connection strength.
[0046] Furthermore, the through hole 1 is a countersunk hole, and the countersunk hole can be Figure 4 Cone countersunk hole shown, or Figure 5 Shown is the countersunk hole in the table. The countersunk hole conceals the nail head of the fixing nail, allowing the connection plate to remain flat on the surface after installation, improving patient comfort and aesthetics.
[0047] In addition, the skull repair fixing connecting piece of this embodiment is made of titanium alloy.
[0048] Beneficial effects of this embodiment: Compared with Example 1, the area of region A of this embodiment is larger than that of region A of Example 1, so the connecting piece has better strength, and at the same time, the long hole is located in region A, and the strength of the thickness gradient region B is not easily affected by the long hole. However, since the area of the thickness gradient region B is smaller than that of Example 1, the comfort is worse than that of Example 1.
[0049] Example 3
[0050] Embodiment 3 of a skull repair fixing connecting piece is based on any of the above embodiments, except that: Figure 6 As shown, the maximum width of the connecting piece is W1, the middle width of the connecting piece at the midline along the length direction is W2, the maximum width W1 is greater than the middle width W2, and there is a notch in the middle of the connecting piece, which can save materials and increase the adaptability of the curvature.
[0051] The maximum width W1 of the connecting piece may also be equal to the middle width W2, such as Figure 1 As shown, the connecting piece is more complete as a whole and has higher strength.
[0052] The maximum width W1 and the middle width W2 are both in the range of 5-10 mm; the length L of the connecting piece is 15-50 mm.
[0053] like Figure 7 As shown, a clamping portion 101 is provided in the through hole 1, and the connection is more stable after the fixing nail is installed in the clamping portion.
[0054] In addition, the skull repair fixing connecting piece of this embodiment is made of polyetheretherketone.
[0055] Example 4
[0056] A skull repair system includes a repair body 2 and a skull repair fixing connecting piece of any of the above embodiments. The skull repair fixing connecting piece can be integrally formed with the skull repair body 2 or can be separated, which can be selected according to the specific use. Figure 8 As shown, when the two are integrally formed, the skull repair fixing connecting piece is provided with at least one through hole 1. In this embodiment, one through hole 1 is provided, and region A is an area covering the through hole 1 extending outward from the center point of the connecting piece, and one end of region A extends to the edge of the skull repair body 2 and is directly integrally formed with the skull repair body 2, and the thickness gradient region B is the peripheral area of region A; when in use, a fixing nail is used to pass through the through hole 1 in region A to fix the connecting piece to the autologous skull, so that the connection and fixation of the autologous skull and the skull repair body 2 can be achieved.
[0057] When the two are split, such as Fig. 9 As shown, the skull repair fixing connecting piece is provided with at least two through holes 1, region A is the center point of the connecting piece or an area extending outward from the center point of the connecting piece to cover all the through holes 1, and the thickness gradient area B is the peripheral area of region A; when in use, a fixing nail is used to pass through at least two through holes 1 in region A to fix the skull repair fixing connecting piece to the skull repair body 2 or the autologous skull, respectively, so as to achieve the connection and fixation of the skull repair body 2 and the autologous skull.
[0058] The remaining effects of this embodiment are consistent with any of the above embodiments.
[0059] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.
Claims
1. A skull repair fixing connecting piece, the connecting piece is provided with at least one through hole (1), characterized in that: The connecting piece is divided into an area A and a thickness gradient area B surrounding the area A, the area A being the center point of the connecting piece or an area extending outward from the center point of the connecting piece and covering all the through holes (1); the thickness of the thickness gradient area B gradually becomes thinner from one end close to the area A to the edge end, and the minimum thickness of the area A is greater than or equal to the maximum thickness of the thickness gradient area B.
2. The skull repair fixing connecting piece according to claim 1, wherein the thickness of the thickness gradient region B is in the range of 0.1-2 mm, and the thickness of the region A is in the range of 0.6-2 mm.
3. The skull repair fixing connecting piece according to claim 1 or 2, characterized in that: At least one of the through holes (1) is a long hole.
4. The skull repair fixing connecting piece according to claim 3, characterized in that: The through hole (1) is a straight through hole or a countersunk hole, and the countersunk hole is a conical countersunk hole or a platform countersunk hole.
5. The skull repair fixing connecting piece according to claim 3, characterized in that: The length of the long hole is 1-25 mm.
6. The skull repair fixing connecting piece according to claim 1 or 2, characterized in that: The bottom surface of the connecting piece is an arc surface, the arc center of the arc surface is located on the side away from the top surface of the connecting piece, and the curvature radius K of the arc surface is 40-70 mm.
7. The skull repair fixing connecting piece according to claim 1 or 2, characterized in that: The edge of the connecting piece is configured as a rounded corner.
8. The skull repair fixing connecting piece according to claim 1 or 2, characterized in that: The connecting sheet is made of metal or polymer.
9. The skull repair fixing connecting piece according to claim 1, characterized in that: At least two through holes are provided, and the shortest distance between two adjacent through holes (1) is 6-15 mm.
10. A skull repair system, characterized in that: It comprises a skull repair body and the skull repair fixing connecting piece according to any one of claims 1 to 8, one end of the connecting piece is fixedly connected to the skull repair body, and the two are integrally formed.