Rib plate and rib bone fixation kit

Abstract

The present invention provides a rib osteosynthesis plate. The rib osteosynthesis plate includes a plate body and a plurality of nail bodies protruding and extending from the plate body toward the same side. Both the nail bodies and the plate body are made by pouring silk fibroin solution. The nail bodies and the plate body are integrally formed. Each nail body includes multiple support layers arranged from the inside to the outside, and each support layer is inclined and penetrated with expansion grooves. When the nail body is subjected to axial pressure, it expands radially. The rib osteosynthesis plate and the rib osteosynthesis kit of the present invention, by providing an integrally connected plate body and nail bodies, enable the nail bodies to expand to achieve the fixation of the rib osteosynthesis plate, avoiding the risk of weakened fixation effect caused by screw loosening and further causing the displacement of the osteosynthesis plate, and effectively promoting the normal healing of fractures.

Description

Technical Field

[0001] The present invention relates to a medical device, in particular to a rib bone fracture plate and a rib bone fracture kit. Background Art

[0002] Rib fractures are the most common type of chest trauma, and their incidence is increasing year by year worldwide, placing a heavy burden on society and individuals. Statistics show that approximately 60%-80% of chest trauma patients suffer rib fractures.

[0003] Rib plates and rib embracing devices are the two primary medical devices used to treat rib fractures. Currently, both are mostly made of metal. The Young's modulus of metal is much greater than that of human bone, which can lead to stress shielding and biocompatibility issues during use. Compared to rib plates, rib embracing devices are less effective at maintaining long-term stability at the fracture site than some rib plates. Under the influence of factors such as breathing and movement, the embracing devices may become loose, displaced, or even break.

[0004] Rib plates are generally used with locking screws in clinical use. Although their fixation stability is higher than that of rib cuffs, there are still some problems. It is difficult to provide long-term stable fixation when facing the continuous stress generated by respiratory movement and chest movement. The connection between the screw and the plate is mostly a simple threaded fit, which is prone to loosening under repeated micro-motion. For example, when the patient takes a deep breath, coughs, and other actions after surgery, the rise and fall of the chest will cause a certain displacement of the ribs. Over a long period of time, the screws may gradually loosen, causing the plate to shift, affecting fracture healing, and may even cause the fracture site to be dislocated again.

[0005] In view of this, it is necessary to improve the existing rib bone fracture plate to solve the above problems. Summary of the Invention

[0006] The object of the present invention is to provide a rib bone fracture plate to solve the problem that the existing bone fracture plate is easily loosened by screw thread connection.

[0007] To achieve the above-mentioned purpose, the present invention provides a rib bone fracture plate, which includes a plate body and a plurality of nail bodies extending from the plate body toward the same side. The nail bodies and the plate body are both cast using silk protein liquid. The nail bodies and the plate body are integrally formed. The nail body includes multiple supporting layers arranged from the inside to the outside, and each supporting layer is inclined and penetrated by an expansion groove. The nail body expands radially when subjected to axial pressure.

[0008] As a further improvement of the present invention, the expansion grooves on two adjacent support layers have opposite inclination directions.

[0009] As a further improvement of the present invention, the rib bone plate further includes a locking washer disposed around the nail body and used for fixedly connecting the nail body and the plate body. The locking washer is in a circular ring shape for the nail body to pass through.

[0010] As a further improvement of the present invention, the locking washer includes a first part close to the nail body in the radial direction, a second part adjacent to the first part, and a third part adjacent to the second part and away from the first part in the radial direction. The first part is made of PCLA microfilaments, the second part is made of silk fibroin solution, and the third part is made of a mixed solution of silk fibroin and vitamins.

[0011] As a further improvement of the present invention, a groove is provided in the second part. The groove axially penetrates the locking washer. The locking washer is poured with silk fibroin solution into the groove to form a fixing part. The fixing part includes a first connecting part and a second connecting part. The first connecting part is located in the groove for fixedly connecting the plate body and the locking washer, and the second connecting part is used for fixedly connecting the first connecting part and the nail body. The fixing part fixedly connects the locking washer, the nail body and the plate body.

[0012] As a further improvement of the present invention, the fixing part gradually thins from the nail body from the inside out and is partially poured into the groove.

[0013] As a further improvement of the present invention, the rib bone plate further includes a fixing member. The fixing member includes a first supporting part and a second supporting part connected to the first supporting part. The fixing member has a first state in which the second supporting part expands in the radial direction, and a second state in which the first supporting part is rotated so that the second supporting part contracts in the radial direction. Rotate the fixing member to make it in the second state, place the second supporting part of the fixing member into the expanded nail body, and after removing the external force, the fixing member is in the first state and fixes the nail body.

[0014] As a further improvement of the present invention, the fixing member includes a silk fibroin bracket disposed in the second supporting part. The silk fibroin bracket includes a plurality of support rods, and the plurality of support rods surround to form a plurality of lattices.

[0015] The present invention also provides a rib bone fixation kit, which includes the rib bone plate, a trial mold, and a presser as described above. The trial mold has the same shape and size as the plate body, and the presser is used to provide axial pressure to the rib bone plate.

[0016] As a further improvement of the present invention, the presser includes a clamping part for clamping the rib, a pressing part for pressing the rib bone plate, a handle for the user to hold, a clamping regulator for driving the clamping part to clamp or loosen, and a pressing regulator for controlling the axial movement of the pressing part.

[0017] The beneficial effects of the present invention are as follows: For the rib bone plate and the rib bone fixation kit of the present invention, by providing an integrally connected plate body and nail body, the nail body can expand to achieve the fixation of the rib bone plate, avoiding the risk of weakened fixation effect caused by screw loosening and further causing the displacement of the bone plate, which effectively promotes the normal healing of fractures. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation of the present application. In the drawings:

[0019] Figure 1 is a schematic structural view of the rib bone plate of the present invention;

[0020] Figure 2 is a schematic structural view of the rib bone plate of the present invention from another angle;

[0021] Figure 3 is a schematic sectional structural view of a part of the rib bone plate of the present invention;

[0022] Figure 4 is a schematic sectional structural view of the nail body of the rib bone plate of the present invention;

[0023] Figure 5 is a schematic sectional structural view of the rib bone plate of the present invention after expansion;

[0024] Figure 6 is a schematic structural view of the rib bone plate of the present invention received in the installation hole;

[0025] Figure 7 is a schematic structural view of the rib bone plate of the present invention received in the installation hole and the nail body expanded;

[0026] Figure 8 is a schematic structural view of the fixing member of the rib bone plate of the present invention;

[0027] Figure 9 is a schematic sectional structural view of the fixing member of the rib bone plate of the present invention;

[0028] Figure 10 is a schematic structural view of the rib bone plate of the present invention received in the installation hole and the fixing member installed;

[0029] Figure 11 It is a schematic structural diagram of a trial mold of the rib bone fixation kit of the present invention;

[0030] Figure 12 It is a schematic structural diagram of a presser of the rib bone fixation kit of the present invention. Detailed implementation manners

[0031] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is 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 orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside 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 situations. In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] As Figures 1 to 6 shown, the rib bone fixation kit of the present invention includes a rib bone fixation plate 1, a trial mold 2, and a presser 3.

[0035] The rib bone fixation plate 1 includes a plate body 11, a plurality of nail bodies 12 protruding and extending from the plate body 11 towards the same side, a locking washer 13 disposed around the nail bodies 12 and used for fixedly connecting the nail bodies 12 and the plate body 11, and a fixing member 14.

[0036] The shape of the plate body 11 matches the ribs, and the trial mold 2 has the same shape and size as the plate body 11. The trial mold 2 is made of metal material to reduce costs. It is used to test whether the plate body 11 of the bone plate fits the ribs, and the mounting holes 4 are drilled in advance on the ribs through the holes in the trial mold 2.

[0037] Both the nail body 12 and the plate body 11 are cast using a silk protein solution. Silk protein is a degradable material whose degraded substances are mainly amino acids, which can be absorbed and utilized by the body. It also has excellent biocompatibility and can significantly reduce the body's immune system's rejection of implants. Medical devices made with silk protein can significantly improve the comfort and safety of patients recovering after surgery. Silk protein can also be used as a drug carrier, and drugs can be mixed with the silk protein solution.

[0038] The screw body 12 and the plate body 11 are integrally formed. This integrated design integrates the screw body 12 and the plate body 11 into a single unit, effectively preventing the screw from loosening during breathing and daily exercise. This reduces the risk of weakened fixation and subsequent plate displacement due to screw loosening. This creates a stable healing environment for the fracture site, effectively promoting normal fracture healing.

[0039] The nail body 12 includes multiple supporting layers 121 arranged from the inside out. Each supporting layer 121 is provided with an expansion groove 122 that is inclined and penetrates through it. When the nail body 12 is subjected to axial pressure, it expands radially. In this embodiment, the end of the nail body 12 away from the plate body 11 is provided with an elliptical head 123. The elliptical head 123 can serve as a guide and support. The expansion groove 122 is provided between the elliptical head 123 and the plate body 11. When the elliptical head 123 is squeezed, the portion with the expansion groove 122 expands radially, thereby filling the mounting hole 4, achieving the same fixing effect as a traditional screw.

[0040] The expansion grooves 122 on two adjacent support layers 121 have opposite inclinations, thereby enhancing support and stability after expansion. The nail body 12 is manufactured after the plate body 11 is manufactured. A reserved hole is provided on the plate body 11. A glass rod of a corresponding diameter is placed at the axial center of the reserved hole of the plate body 11, and then multiple castings are performed. The diameter of the glass rod is slightly smaller than the diameter of the reserved hole. Each casting produces a new support layer 121. The number of support layers 121 is 2-5, and the thickness of each layer is 0.2-1mm. After each support layer 121 is cast, the expansion grooves 122 are engraved on the surface of the support layer 121.

[0041] The locking washer 13 is annular and is for the nail body 12 to pass through.

[0042] The locking washer 13 includes a first part 131 radially close to the nail body 12, a second part 132 adjacent to the first part 131, and a third part 133 adjacent to the second part 132 and radially away from the first part 131. The first part 131 is made of PCLA microfilaments, the second part 132 is made of silk fibroin solution, and the third part 133 is made of a mixed solution of silk fibroin and vitamin.

[0043] Among them, the first part 131 is made of PCLA microfilaments. The first part 131 is located in the connection area. Making it with PCLA microfilaments has greater strength. At the same time, acidic substances are generated after the degradation of PCLA, which will accelerate the degradation of silk fibroin and promote the degradation process at the end of recovery.

[0044] Grooves are provided in the second part 132, and the grooves axially penetrate the locking washer 13. The locking washer 13 is poured with silk fibroin solution into the grooves to form a fixing part 134. The fixing part 134 includes a first connecting part and a second connecting part. The first connecting part is located in the groove to fixedly connect the plate body 11 and the locking washer 13, and the second connecting part is used to fixedly connect the first connecting part and the nail body 12. The fixing part 134 fixedly connects the locking washer 13, the nail body 12 and the plate body 11.

[0045] The main purpose of forming the grooves in the second part 132 is to pour silk fibroin solution to form the fixing part 134, and the fixing part 134 plays a main connecting role.

[0046] The fixing part 134 gradually thins from the nail body 12 from the inside to the outside, and part of it is poured into the groove. The part close to the nail body 12 has the highest risk of breakage, so the part close to the nail body 12 is poured the thickest.

[0047] It is made of a mixed solution of silk fibroin and vitamin. Because vitamin is an antioxidant, it can slow down the degradation of silk fibroin solution and prevent the rapid degradation of silk fibroin in the early stage.

[0048] The fixing member 14 includes a first support part 141, a second support part 142 connected to the first support part 141, and a silk fibroin bracket 143 provided in the second support part 142. The fixing member 14 is made by pouring silk fibroin solution and can also be gradually degraded. And drugs can be added during the manufacturing process of the fixing member 14, and the drugs can be released as the silk fibroin degrades.

[0049] Since there are multiple nail bodies 12 on each rib plate 1, a corresponding number of fixing members 14 need to be provided, and the fixing members 14 at different positions all serve as independent medicine storage units. This design avoids ionic reactions when multiple drugs are mixed with the silk fibroin solution. When the drug is mixed with the silk fibroin solution, its original properties may change due to chemical actions such as ion exchange and binding between them, while the independent medicine storage can effectively avoid such problems. At the same time, when multiple drugs are combined, the density of the silk fibroin solution or the drug content can be adjusted to control the drug release rate.

[0050] The fixing member 14 has a first state in which the second support portion 142 expands radially, and a second state in which the first support portion 141 is rotated so that the second support portion 142 contracts radially. Rotate the fixing member 14 to make it in the second state, place the second support portion 142 of the fixing member 14 into the expanded nail body 12, and after removing the external force, the fixing member 14 is in the first state and fixes the nail body 12.

[0051] The silk fibroin scaffold 143 includes a plurality of support rods, and the plurality of support rods enclose to form a plurality of lattices, and the lattices are filled with bone induction materials, thereby promoting the growth of bones inside the installation hole 4, gradually growing the bones into the lattices, and forming a cross-linked structure inside the fixing member 14, so as to perform internal fixation.

[0052] The presser 3 is used to provide axial pressure on the rib plate 1. The presser 3 includes a clamping portion 31 for clamping the rib, a pressing portion 32 for pressing the rib plate 1, a handle 33 for the user to hold, a clamping adjuster 34 for driving the clamping portion 31 to clamp or loosen, and a pressing adjuster 35 for controlling the axial movement of the pressing portion 32.

[0053] The presser 3 can be entirely made of metal materials or made of metal materials and high-strength polymer materials. The purpose of the clamping portion 31 is to initially fix the rib plate 1 on the rib, and the pressing portion 32 is to press the rib plate 1 to provide axial pressure, so that the nail body 12 is completely inserted into the installation hole 4 on the rib and an external force is applied to the nail body 12 to make it expand. After installation, the fixing member 14 is placed in the internal cavity of the nail body 12 to prevent the nail body 12 from retracting. In this way, the installation of the rib plate 1 is easily achieved.

[0054] The rib plate 1 and the rib fixation kit of the present invention, by providing the integrally connected plate body 11 and the nail body 12, enable the nail body 12 to expand to achieve the fixation of the rib plate 1, avoid the risk of weakened fixation effect caused by screw loosening and further resulting in the displacement of the fixation plate, and effectively promote the normal healing of fractures.

[0055] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0056] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A rib osteosynthesis plate, characterized in that: The rib bone plate includes a plate body, a plurality of nail bodies protruding and extending from the same side of the plate body, and a fixing member. The nail bodies and the plate body are both made by pouring silk fibroin solution. The nail bodies and the plate body are integrally formed. Each nail body includes multiple support layers arranged from the inside to the outside. An expansion groove is inclined and penetrates through each support layer. When the nail body is subjected to an axial pressure, it expands radially. The fixing member includes a first support portion and a second support portion connected to the first support portion. The fixing member has a first state in which the second support portion expands radially, and a second state in which the first support portion is rotated to cause the second support portion to contract radially. Rotate the fixing member to make it in the second state, place the second support portion of the fixing member into the expanded nail body, and after removing the external force, the fixing member is in the first state and fixes the nail body. The fixing member includes a silk fibroin bracket disposed in the second support portion. The silk fibroin bracket includes a plurality of support rods, and the plurality of support rods enclose to form a plurality of lattices.

2. The rib osteosynthesis plate according to claim 1, wherein: The inclination directions of the expansion grooves on adjacent two support layers are opposite.

3. The rib osteosynthesis plate according to claim 1, characterized in that: The rib bone plate further includes a locking washer disposed around the nail body and used for fixedly connecting the nail body and the plate body. The locking washer is in a circular ring shape for the nail body to pass through.

4. The rib osteosynthesis plate according to claim 3, characterized in that: The locking washer includes a first portion close to the nail body radially, a second portion adjacent to the first portion, and a third portion adjacent to the second portion and away from the first portion radially. The first portion is made of PCLA microfilaments, the second portion is made of silk fibroin solution, and the third portion is made of a mixed solution of silk fibroin and vitamins.

5. The rib osteosynthesis plate according to claim 4, characterized in that: A groove is provided in the second portion, and the groove axially penetrates the locking washer. The locking washer is poured with silk fibroin solution into the groove to form a fixing portion. The fixing portion includes a first connecting portion and a second connecting portion. The first connecting portion is located in the groove and used for fixedly connecting the plate body and the locking washer. The second connecting portion is used for fixedly connecting the first connecting portion and the nail body. The fixing portion fixedly connects the locking washer, the nail body and the plate body.

6. The rib plate according to claim 5, wherein: The fixing portion gradually becomes thinner from the inside to the outside of the nail body and is partially poured into the groove.

7. A rib bone fixation kit, characterized in that: The rib bone set includes the rib bone plate according to any one of claims 1-6, a test mold, and a presser. The test mold has the same shape and size as the plate body. The presser is used to provide an axial pressure to the rib bone plate.

8. The rib bone fixation kit according to claim 7, wherein: The presser includes a clamping portion for clamping the rib, a pressing portion for pressing the rib bone plate, a handle for the user to hold, a clamping adjuster for driving the clamping portion to clamp or loosen, and a pressing adjuster for controlling the axial movement of the pressing portion.

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