Rib bone fracture plate and rib bone fracture suite

Abstract

The invention provides a rib bone fracture plate, the rib bone fracture plate comprises a plate body and a plurality of nail bodies protruding and extending from the plate body to the same side, the nail bodies and the plate body are made of fibroin liquid in a pouring mode, the nail bodies and the plate body are integrally formed, each nail body comprises a plurality of supporting layers arranged from inside to outside, and the supporting layers are arranged between the plate body and the nail bodies. An expansion groove is obliquely formed in each supporting layer in a penetrating mode, and the nail body expands in the radial direction when subjected to axial pressure. According to the rib bone fracture plate and the rib bone fracture suite, the plate body and the nail body which are integrally connected are arranged, so that the nail body can be expanded to fix the rib bone fracture plate, the risk that the bone fracture plate is displaced due to the fact that the fixing effect is weakened due to loosening of screws is avoided, and normal healing of fractures is powerfully promoted.

Description

Technical Field

[0001] The present invention relates to a medical device, and more particularly to a rib plate and a rib fixation kit. Background Art

[0002] Rib fractures are the most common type of chest trauma. Globally, their incidence shows an increasing trend year by year, bringing a heavy burden to society and individuals. According to statistics, among chest trauma patients, about 60%-80% will have rib fractures.

[0003] When there is a rib fracture, rib plates and rib holders are two main medical devices for treatment. Currently, most of them are made of metal materials. The Young's modulus of metal materials is much greater than that of human bones. Therefore, problems such as stress shielding and biocompatibility will occur during use. Compared with rib plates, rib holders are not as good as some rib plates in maintaining the long-term stability of the fracture ends. Under the influence of factors such as breathing and movement, the holder may become loose, displaced or even broken.

[0004] Rib plates are generally used with locking screws in clinical applications. Although their fixation stability is higher than that of rib holders, there are still some problems. When facing the continuous stress generated by respiratory movement and thoracic activity, it is difficult to provide a long-term stable fixation effect. The connection between the screw and the plate is mostly a simple thread fit. Under repeated micro-movement, loosening is likely to occur. For example, when the patient takes deep breaths, coughs and other actions after surgery, the ups and downs of the chest will cause a certain displacement of the ribs. Over time, the screws may gradually become loose, resulting in the displacement of the plate, affecting fracture healing, and even possibly causing the fracture site to be misaligned again.

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

[0006] The purpose of the present invention is to provide a rib plate to solve the problem that the existing plate is prone to loosening due to screw thread connection.

[0007] To achieve the above purpose, the present invention provides a rib plate, which includes a plate body and a plurality of nail bodies protruding and extending from the same side of the plate body. The nail bodies and the plate body are both made by casting silk fibroin solution, and the nail bodies and the plate body are integrally formed. The nail body includes multiple support layers arranged from inside to outside, and each support layer is inclined and penetrated with an expansion groove. When the nail body is subjected to an axial pressure, it expands radially.

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

[0009] As a further improvement of the present invention, the rib osteosynthesis 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, and 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 inside to outside and is partially poured into the groove.

[0013] As a further improvement of the present invention, the rib osteosynthesis 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 stent disposed in the second supporting part. The silk fibroin stent includes a plurality of support rods, and the plurality of support rods surround and form a plurality of lattices.

[0015] The present invention also provides a rib osteosynthesis kit, which includes the rib osteosynthesis 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 an axial pressure on the rib osteosynthesis plate.

[0016] As a further improvement of the present invention, 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.

[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 weakening of the fixation effect caused by the loosening of the screw, and further reducing the risk of the bone plate displacement, which effectively promotes the normal healing of the fracture. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and form 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: Figure 1 is a schematic structural view of the rib bone plate of the present invention; Figure 2 is a schematic structural view of the rib bone plate of the present invention from another angle; Figure 3 is a schematic sectional structural view of a part of the rib bone plate of the present invention; Figure 4 is a schematic sectional structural view of the nail body of the rib bone plate of the present invention; Figure 5 is a schematic sectional structural view of the rib bone plate of the present invention after expansion; Figure 6 is a schematic structural view of the rib bone plate of the present invention received in the mounting hole; Figure 7 is a schematic structural view of the rib bone plate of the present invention received in the mounting hole and the nail body expanded; Figure 8 is a schematic structural view of the fixing member of the rib bone plate of the present invention; Figure 9 is a schematic sectional structural view of the fixing member of the rib bone plate of the present invention; Figure 10 is a schematic structural view of the rib bone plate of the present invention received in the mounting hole and the fixing member installed; Figure 11 is a schematic structural view of the test mold of the rib bone fixation kit of the present invention; Figure 12 is a schematic structural view of the presser of the rib bone fixation kit of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. 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.

[0020] 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 thus 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.

[0021] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, 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.

[0022] 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.

[0023] The rib bone fixation plate 1 includes a plate body 11, a plurality of nail bodies 12 protruding and extending from the same side of the plate body 11, a locking washer 13 disposed around the nail bodies 12 and used to fixedly connect the nail bodies 12 and the plate body 11, and a fixing member 14.

[0024] The shape of the plate body 11 matches that of the rib. 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 and is used to test whether the plate body 11 of the bone fixation plate fits the rib, and installation holes 4 are drilled in advance on the rib through the holes of the trial mold 2.

[0025] The nail body 12 and the plate body 11 are both cast with silk protein liquid. Silk protein is a degradable material. The degraded substances are mainly amino acids, which can be absorbed and utilized by the body. It has excellent biocompatibility and can greatly reduce the rejection reaction of the human immune system to implants. Medical devices made of silk protein can significantly improve the comfort and safety of patients' postoperative recovery. Silk protein can also be used as a carrier of drugs, and drugs can be mixed with silk protein solution.

[0026] The nail body 12 and the plate body 11 are integrally formed. The integrated design integrates the nail body 12 and the plate body 11 into a whole, effectively avoiding the problem of screw loosening during breathing and daily exercise, and avoiding the risk of weakening the fixation effect due to screw loosening, thereby causing the risk of bone plate displacement. Thus, a stable healing environment is created for the fracture site, effectively promoting the normal healing of the fracture.

[0027] The nail body 12 includes a plurality of supporting layers 121 arranged from the inside to the outside, and each supporting layer 121 is provided with an expansion groove 122 which is inclined and penetrated, and the nail body 12 expands radially when subjected to axial pressure. In this embodiment, an elliptical head 123 is provided at one end of the nail body 12 away from the plate body 11, and the elliptical head 123 can play a guiding and supporting role, and the expansion groove 122 is arranged between the elliptical head 123 and the plate body 11. After the elliptical head 123 is squeezed, the part with the expansion groove 122 will expand radially, thereby filling the mounting hole 4, and achieving the same fixing effect as a traditional screw.

[0028] The expansion grooves 122 on the two adjacent support layers 121 have opposite inclination directions, so as to enhance the support and stability effect after expansion. The nail body 12 is made after the plate body 11 is made. A reserved hole is provided on the plate body 11. A glass rod of corresponding diameter is placed at the axial position of the reserved hole of the plate body 11, and then multiple pouring is performed, wherein the diameter of the glass rod is slightly smaller than the diameter of the reserved hole. Each pouring produces a new support layer 121, and the number of support layers 121 is 2-5 layers, and the thickness of each layer is 0.2-1mm. After each support layer 121 is poured, the pattern of the expansion groove 122 is engraved on the surface of the support layer 121.

[0029] The locking washer 13 is in a circular ring shape for the nail body 12 to pass through.

[0030] 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.

[0031] 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.

[0032] Grooves are provided in the second part 132. 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. 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.

[0033] The main purpose of the second part 132 to form the grooves is to pour silk fibroin solution to form the fixing part 134, and the fixing part 134 plays a main connecting role.

[0034] The fixing part 134 gradually thins from the nail body 12 from the inside out and is partially poured into the grooves. The part close to the nail body 12 has the highest risk of breaking, so the part close to the nail body 12 is poured the thickest.

[0035] 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.

[0036] 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 arranged 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 production process of the fixing member 14, and the drugs can be released as the silk fibroin degrades.

[0037] Since there are multiple nail bodies 12 on each rib plate 1, multiple fixing members 14 need to be correspondingly provided, and the fixing members 14 at different positions all serve as independent drug 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 each other, 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.

[0038] 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.

[0039] 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, so as to promote the growth of bones inside the installation hole 4, gradually grow the bones into the lattices, and form a cross-linked structure inside the fixing member 14, so as to perform internal fixation.

[0040] The presser 3 is used to provide an 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 regulator 34 for driving the clamping portion 31 to clamp or loosen, and a pressing regulator 35 for controlling the axial movement of the pressing portion 32.

[0041] 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 an 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 the installation is completed, 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.

[0042] 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 the fixation effect being weakened due to screw loosening and further causing the displacement of the fixation plate, and effectively promote the normal healing of fractures.

[0043] 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 various technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0044] 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 modifications 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 and a plurality of nail bodies protruding and extending from the same side of the plate body. 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 inside to 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.

2. The rib osteosynthesis plate according to claim 1, characterized in that: 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 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.

5. The rib plate according to claim 4, wherein: A groove is provided in the second part, and the groove penetrates through the locking washer axially. 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. 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.

6. The rib osteosynthesis plate according to claim 5, characterized in that: The fixing part gradually thins from inside to outside of the nail body and is partially poured into the groove.

7. The rib osteosynthesis plate according to claim 1, characterized in that: The rib bone plate further includes a fixing member. The fixing member includes a first support part and a second support part connected to the first support part. The fixing member has a first state in which the second support part expands radially, and a second state in which the first support part is rotated to make the second support part contract radially. The fixing member is rotated to be in the second state, and the second support part of the fixing member is placed into the expanded nail body. After the external force is removed, the fixing member is in the first state and fixes the nail body.

8. The rib plate according to claim 7, wherein: The fixing member includes a silk fibroin bracket disposed in the second support part. The silk fibroin bracket includes a plurality of support rods, and the plurality of support rods surround to form a plurality of lattices.

9. A rib bone fixation kit, characterized in that: The rib bone set includes the rib bone plate according to any one of claims 1-8, a trial mold, and a presser. The trial 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.

10. The rib bone fixation kit according to claim 9, characterized in that: 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.

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