Artificial sternum

Abstract

The present invention provides an artificial sternum, which comprises: a sternum main body, having a sternum connecting part, a sterno-clavicular connecting part and a sterno-costal connecting part, wherein the sternum connecting part is located at the lower end of the sternum main body, the sterno-clavicular connecting part is a retractable structure, the sterno-clavicular connecting part is located at the side wall of the upper end of the sternum main body, and the sterno-costal connecting part is arranged on the side wall of the sternum main body and is located between the sterno-clavicular connecting part and the sternum connecting part; a clavicle connecting part, wherein one end of the clavicle connecting part is connected to the sterno-clavicular connecting part, and the other end of the clavicle connecting part is connected to the clavicle; a rib connecting part, wherein one end of the rib connecting part is connected to the sterno-costal connecting part, and the other end of the rib connecting part is connected to the rib, and the length of the rib connecting part is adjustable. Through the technical solution provided by the present application, the problem of low degree of freedom between the artificial sternum and clavicle and the artificial sternum and ribs in the related art can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of prostheses, and in particular to an artificial sternum. Background Art

[0002] The human sternum, ribs and thoracic vertebrae together form the bony chest wall structure, which plays an important role in protecting important organs such as the heart and lungs in the human chest cavity. Due to sternal tumors, mediastinal tumors and severe sternal infections, surgical treatment is often required to remove the sternum and multiple ribs connected to it, resulting in a large area of ​​bony chest wall deficiency, which destroys the integrity and stability of the thorax and the protection of the mediastinal organs, and endangers the patient's life. Therefore, for some patients who have a complete sternum deficiency due to chest wall tumors, mediastinal tumors or severe sternal infections after sternal resection surgery, bony chest wall functional reconstruction is usually performed.

[0003] Although the autologous tissues such as muscle flaps, skin flaps, and greater omentum currently used in clinical chest wall reconstruction have the characteristics of wide sources, easy collection, good tissue compatibility, and no foreign body reaction, their disadvantages are limited material collection, damage to other tissue structures, and surgical trauma. In addition, the repair of autologous tissues tends to cover the defect area, and the tensile strength is insufficient when applied to the chest wall, and the rigidity conditions are not ideal.

[0004] On the other hand, more and more artificial materials are used clinically for chest wall reconstruction, including bone cement and / or partial autologous tissue material combined reconstruction, polytetrafluoroethylene patch and MMA (methyl methacrylate resin) and other artificial materials. These materials have good compatibility with body tissues, but have the disadvantages of high cost and insufficient strength. In addition, hard materials such as steel plates, titanium plates, plexiglass plates, and wire mesh are used. These materials have high strength and good protection for the chest cavity, but these materials are difficult to suture and fix. They often need to be fixed with steel wire or screws and are easy to loosen. In addition, these hard artificial materials are not easy to shape and cut, and the structure and connection method of the materials are easy to cause damage to the surrounding soft tissues, which limits the patient's ability to resume normal life activities in the later stage.

[0005] The existing methods for reconstruction of the manubrium in the sternal skeleton are as follows. The manubrium is the part of the sternal skeleton that is connected to the clavicle, and is connected to the clavicle and ribs through a base, which greatly limits the freedom between the artificial sternum and ribs, and between the artificial sternum and clavicle. A large movement of the patient often causes the base to break, and even causes wear and tear on the normal clavicle and intact ribs, increasing the patient's pain. Summary of the invention

[0006] The present invention provides an artificial sternum to solve the problem of low degree of freedom between the artificial sternum and clavicle and between the artificial sternum and ribs in the related art.

[0007] The invention provides an artificial sternum, which comprises: a sternum main body, which is provided with a sternum connecting part, a sterno-clavicular connecting part and a sterno-costal connecting part, wherein the sternum connecting part is located at the lower end of the sternum main body, the sterno-clavicular connecting part is a retractable structure, the sterno-clavicular connecting part is located at the side wall of the upper end of the sternum main body, and the sterno-costal connecting part is arranged on the side wall of the sternum main body and is located between the sterno-clavicular connecting part and the sternum connecting part; a clavicle connecting piece, wherein one end of the clavicle connecting piece is connected to the sterno-clavicular connecting part, and the other end of the clavicle connecting piece is connected to the clavicle; and a rib connecting piece, wherein one end of the rib connecting piece is connected to the sterno-costal connecting part, and the other end of the rib connecting piece is connected to the rib, and the length of the rib connecting piece is adjustable.

[0008] Furthermore, the sterno-clavicular connection portion includes a telescopic section, which can be telescoped along an extension direction of the sterno-clavicular connection portion, and the telescopic section includes a filamentous structure.

[0009] Furthermore, the filamentary structure includes a plurality of first wires and a plurality of second wires, and the plurality of first wires and the plurality of second wires are arranged in one-to-one correspondence, and both the first wires and the second wires are wavy structures, and the crests of the first wires correspond to the troughs of the second wires, and the troughs of the first wires correspond to the crests of the second wires.

[0010] Furthermore, the sterno-clavicular connection part also includes a first section and a second section, the telescopic section is located between the first section and the second section, the first section is connected to the sternum body, the second section is connected to the clavicle connector, the two ends of the first silk thread are respectively connected to the first section and the second section, and the two ends of the second silk thread are respectively connected to the first section and the second section.

[0011] Further, the diameters of the first wire and the second wire are both between 0.8 mm and 1.2 mm; and / or the total number of the first wire and the second wire is between 15 and 25.

[0012] Furthermore, the rib connecting piece includes a sliding cavity piece and a connecting rod. The sliding cavity piece has a sliding hole at one end facing the sternum body. The connecting rod can be movably inserted into the sliding hole. The outer wall of the connecting rod is sealed with the hole wall of the sliding hole. The sliding cavity piece is connected to the ribs, and the connecting rod is connected to the sterno-rib connecting part.

[0013] Furthermore, the rib connector also includes a sealing ring, which is sleeved on the outer side wall of the connecting rod and located in the sliding hole, and the outer edge and inner edge of the sealing ring are respectively in contact with the hole wall of the sliding hole and the outer side wall of the connecting rod.

[0014] Furthermore, a first joint is arranged between the sterno-clavicular connecting part and the clavicle connecting part, and the sterno-clavicular connecting part and the clavicle connecting part are movably connected through the first joint; the first joint includes a first joint recess and a first sphere, and the end of the sterno-clavicular connecting part facing the clavicle connecting part has the first joint recess, and the clavicle connecting part has a protruding first sphere, and the first sphere is inserted into the first joint recess.

[0015] Furthermore, a second joint is arranged between the sterno-rib connecting part and the rib connecting piece, and the sterno-rib connecting part and the rib connecting piece are movably connected through the second joint; the second joint includes a second joint recess and a second sphere, and the end of the sterno-rib connecting part facing the rib connecting piece has a second joint recess, and the rib connecting piece has a protruding second sphere, and the second sphere is inserted into the second joint recess.

[0016] Furthermore, the sternum body has weight-reducing holes; the sternum body has a first porous structure; the sternum connecting part has a second porous structure; the inner side of the sternum body is polished; the artificial sternum includes two clavicle connecting parts, the sternum body has two symmetrically arranged sterno-clavicular connecting parts, and the two clavicle connecting parts are arranged corresponding to the two sterno-clavicular connecting parts; the sternum body has at least two symmetrically arranged sterno-costal connecting parts.

[0017] By applying the technical solution of the present invention, after the artificial sternum is implanted in a human body, the sternum connecting part of the sternum body is connected to the sternum of the human body, one end of the clavicle connecting piece is connected to the sterno-clavicular connecting part of the sternum body, the other end of the clavicle connecting piece is connected to the clavicle, one end of the rib connecting piece is connected to the sterno-rib connecting part of the sternum body, and the other end of the rib connecting piece is connected to the rib. Since the sterno-clavicular connecting part is a telescopic structure, the telescopic structure of the sterno-clavicular connecting part can be used to enhance the degree of freedom of the sternum and the clavicle, and the length of the rib connecting piece is adjustable, and the combination and micro-motion of the sternum and the ribs can be enhanced by adjusting the length of the rib connecting piece. Therefore, the degree of freedom between the artificial sternum and the ribs and between the artificial sternum and the clavicle is enhanced, thereby achieving better postoperative efficacy and providing better postoperative activity effects. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 1 A schematic structural diagram of an artificial sternum provided by an embodiment of the present invention is shown;

[0020] Figure 2 Another structural schematic diagram of an artificial sternum provided by an embodiment of the present invention is shown;

[0021] Figure 3 A side view of an artificial sternum provided by an embodiment of the present invention is shown.

[0022] The above drawings include the following reference numerals:

[0023] 10. sternum body; 11. sternum connection; 12. sterno-clavicular connection; 121. telescopic section; 1211. filamentous structure; 1212. first thread; 1213. second thread; 122. first section; 123. second section; 13. sterno-rib connection; 14. weight-reducing hole;

[0024] 20. Clavicle connector;

[0025] 30. rib connecting piece; 31. sliding cavity piece; 311. sliding hole; 32. connecting rod; 33. sealing ring;

[0026] 40. first joint; 41. first joint concave; 42. first sphere;

[0027] 50. Second joint; 51. Second joint concave; 52. Second sphere. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] like Figures 1 to 3 As shown, an embodiment of the present invention provides an artificial sternum, which includes a sternum body 10, a clavicle connector 20 and a rib connector 30. The sternum body 10 has a sternum connector 11, a sterno-clavicular connector 12 and a sterno-rib connector 13, the sternum connector 11 is located at the lower end of the sternum body 10, the sterno-clavicular connector 12 is a retractable structure, the sterno-clavicular connector 12 is located at the side wall of the upper end of the sternum body 10, the sterno-rib connector 13 is arranged on the side wall of the sternum body 10 and is located between the sterno-clavicular connector 12 and the sternum connector 11, one end of the clavicle connector 20 is connected to the sterno-clavicular connector 12, the other end of the clavicle connector 20 is connected to the clavicle, one end of the rib connector 30 is connected to the sterno-rib connector 13, the other end of the rib connector 30 is connected to the rib, and the length of the rib connector 30 is adjustable.

[0030] By applying the technical solution of the present invention, after the artificial sternum is implanted in a human body, the sternum connecting part 11 of the sternum body 10 is connected to the sternum of the human body, one end of the clavicle connecting member 20 is connected to the sterno-clavicular connecting part 12 of the sternum body 10, the other end of the clavicle connecting member 20 is connected to the clavicle, one end of the rib connecting member 30 is connected to the sterno-rib connecting part 13 of the sternum body 10, and the other end of the rib connecting member 30 is connected to the rib. Since the sterno-clavicular connecting part 12 is a telescopic structure, the telescopic structure of the sterno-clavicular connecting part 12 can be used to enhance the degree of freedom of the sternum and the clavicle, and the length of the rib connecting member 30 is adjustable, and the combination and micro-motion of the sternum and the ribs can be enhanced by adjusting the length of the rib connecting member 30, so that the degree of freedom between the artificial sternum and the ribs and the clavicle is enhanced, thereby achieving a better postoperative therapeutic effect and providing a better postoperative activity effect. In addition, since the degree of freedom between the artificial sternum and the ribs and between the artificial sternum and the clavicle is enhanced, the sternum body 10 will not be broken.

[0031] In this embodiment, since the length of the rib connector 30 is adjustable, it can not only achieve reconstruction of the thorax, but also adjust the size of the chest cavity during breathing, reduce the generation of postoperative respiratory pressure, and achieve the ups and downs and movement of chest breathing.

[0032] like Figure 1 As shown, the sterno-clavicular connection part 12 includes a telescopic section 121, which can be telescopic along the extension direction of the sterno-clavicular connection part 12, and the telescopic section 121 includes a filamentous structure 1211. The telescopic section 121 is used to make the sterno-clavicular connection part 12 telescopic, which has the advantage of simple structure.

[0033] In this embodiment, the filament structure 1211 includes a plurality of filaments, and the plurality of filaments are in a bent filament shape and can be deformed, thereby realizing the expansion and contraction of the expansion and contraction section 121 .

[0034] like Figure 1 As shown, the filamentary structure 1211 includes a plurality of first filamentary threads 1212 and a plurality of second filamentary threads 1213, and the plurality of first filamentary threads 1212 and the plurality of second filamentary threads 1213 are arranged in a one-to-one correspondence, and the first filamentary threads 1212 and the second filamentary threads 1213 are both wavy structures, and the crests of the first filamentary threads 1212 correspond to the troughs of the second filamentary threads 1213, and the troughs of the first filamentary threads 1212 correspond to the crests of the second filamentary threads 1213. The filamentary structure 1211 composed of the first filamentary threads 1212 and the second filamentary threads 1213 can enhance the utilization of space, and then a sufficient number of the first filamentary threads 1212 and the second filamentary threads 1213 are arranged in a limited space, which can maintain the scalability of the filamentary structure 1211 without affecting the strength of the filamentary structure 1211.

[0035] In this embodiment, the first wires 1212 and the second wires 1213 of the filamentary structure 1211 are arranged alternately.

[0036] like Figure 1 As shown, the sterno-clavicular connection part 12 also includes a first section 122 and a second section 123, the telescopic section 121 is located between the first section 122 and the second section 123, the first section 122 is connected to the sternum body 10, the second section 123 is connected to the clavicle connection piece 20, the two ends of the first silk thread 1212 are respectively connected to the first section 122 and the second section 123, and the two ends of the second silk thread 1213 are respectively connected to the first section 122 and the second section 123. The sterno-clavicular connection part 12 with the above structure avoids the first silk thread 1212 and the second silk thread 1213 from being directly connected to the clavicle connection piece 20 and the sternum body 10, and has the advantages of being easy to process and easy to connect.

[0037] In this embodiment, the outer diameter of the filamentary structure 1211 is the same as the outer diameters of the first section 122 and the second section 123. The outer diameter of the filamentary structure 1211 refers to the diameter of the cylinder formed by the filamentary structure 1211.

[0038] Specifically, the diameters of the first wire 1212 and the second wire 1213 are both between 0.8 mm and 1.2 mm. The use of the first wire 1212 and the second wire 1213 in the above size range can facilitate extension and retraction without affecting the strength of the first wire 1212 and the second wire 1213. If the diameters of the first wire 1212 and the second wire 1213 are both less than 0.8 mm, the strength of the first wire 1212 and the second wire 1213 will be affected, making the first wire 1212 and the second wire 1213 prone to breakage. If the diameters of the first wire 1212 and the second wire 1213 are both greater than 1.2 mm, it is not easy to extend and retract.

[0039] The diameters of the first wire 1212 and the second wire 1213 can be 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, or any value between 0.8 mm and 1.2 mm. In this embodiment, the diameters of the first wire 1212 and the second wire 1213 are both 1 mm.

[0040] It should be noted that the total number of the first wires 1212 and the second wires 1213 is between 15 and 25. By setting the total number of the first wires 1212 and the second wires 1213 within the above range, the telescopic section 121 can have a longer service life, and the first wires 1212 and the second wires 1213 will not affect each other, thereby affecting the telescopic performance of the telescopic section 121. If the total number of the first wires 1212 and the second wires 1213 is less than 15, the service life of the telescopic section 121 will be affected. If the total number of the first wires 1212 and the second wires 1213 is greater than 25, the first wires 1212 and the second wires 1213 will affect each other, thereby affecting the telescopic performance of the telescopic section 121.

[0041] The total number of the first threads 1212 and the second threads 1213 may be 16, 18, 20, 22, 24, and any even value between 15 and 25. In this embodiment, the total number of the first threads 1212 and the second threads 1213 is 20.

[0042] like Figure 1 As shown, the rib connecting member 30 includes a sliding cavity member 31 and a connecting rod 32. The sliding cavity member 31 has a sliding hole 311 at one end facing the sternum body 10. The connecting rod 32 is movably inserted into the sliding hole 311. The outer wall of the connecting rod 32 is sealed with the hole wall of the sliding hole 311. The sliding cavity member 31 is connected to the ribs, and the connecting rod 32 is connected to the sterno-rib connecting portion 13. The structure in which the connecting rod 32 is inserted into the sliding hole 311 of the sliding cavity member 31 has the advantages of simple structure and easy assembly.

[0043] like Figure 1 As shown, the rib connector 30 further includes a sealing ring 33, which is sleeved on the outer wall of the connecting rod 32 and located in the sliding hole 311, and the outer edge and inner edge of the sealing ring 33 respectively abut against the hole wall of the sliding hole 311 and the outer wall of the connecting rod 32. By providing the sealing ring 33, a seal can be formed between the sliding cavity member 31 and the connecting rod 32, which is conducive to adjusting the length of the connecting rod 32 in the sliding cavity member 31, and the cavity between the sliding hole 311 and the outer wall of the connecting rod 32 is used for buffering.

[0044] In this embodiment, the rib connector 30 is provided with three sealing rings 33 .

[0045] like Figure 1 and Figure 3 As shown, a first joint 40 is provided between the sterno-clavicular connection part 12 and the clavicle connection part 20, and the sterno-clavicular connection part 12 and the clavicle connection part 20 are movably connected through the first joint 40. The clavicle connection part 20 can form a movable joint connection relative to the sterno-clavicular connection part 12 through the first joint 40, while ensuring stability, further enhancing the degree of freedom between the artificial sternum and the clavicle. In addition, by providing the first joint 40, the artificial sternum and the clavicle can rotate relative to each other, which can reduce the wear between the artificial sternum and the clavicle, thereby reducing the pain of the patient.

[0046] like Figure 1 and Figure 3 As shown, the first joint 40 includes a first joint recess 41 and a first sphere 42. The end of the sterno-clavicular connecting portion 12 facing the clavicle connecting member 20 has the first joint recess 41. The clavicle connecting member 20 has a protruding first sphere 42. The first sphere 42 is inserted into the first joint recess 41. The first joint 40 with the above structure has the advantages of simple structure and easy assembly.

[0047] In this embodiment, the first joint recess 41 is configured as a concave spherical surface, and the volumes of the first joint recess 41 and the first sphere 42 both exceed half a sphere, so that the first joint recess 41 and the first sphere 42 can form a press-fit fixed joint, and the first sphere 42 will not fall out of the first joint recess 41.

[0048] The movable joint formed by the first joint 40 can form a spherical joint surface at the first joint recess 41 to adapt to different anatomical and physiological data and achieve prosthesis implantation with minimal trauma and small incision.

[0049] like Figure 1 and Figure 3 As shown, a second joint 50 is provided between the sterno-rib connecting portion 13 and the rib connecting member 30, and the sterno-rib connecting portion 13 and the rib connecting member 30 are movably connected through the second joint 50. The rib connecting member 30 can form a movable joint connection relative to the sterno-rib connecting portion 13 through the second joint 50, further enhancing the degree of freedom between the artificial sternum and the ribs. In addition, by providing the second joint 50, the artificial sternum and the ribs can rotate relative to each other, which can reduce the wear between the artificial sternum and the ribs, thereby reducing the pain of the patient.

[0050] like Figure 1 and Figure 3 As shown, the second joint 50 includes a second joint recess 51 and a second sphere 52. The end of the sternocostal connecting portion 13 facing the rib connecting member 30 has the second joint recess 51. The rib connecting member 30 has a protruding second sphere 52. The second sphere 52 is inserted into the second joint recess 51. The second joint 50 with the above structure has the advantages of simple structure and easy assembly.

[0051] In this embodiment, the second joint recess 51 is configured as a concave spherical surface, and the volumes of the second joint recess 51 and the second sphere 52 both exceed half a sphere, so that the second joint recess 51 and the second sphere 52 can form a press-fit fixed joint, and the second sphere 52 will not fall out of the second joint recess 51.

[0052] like Figure 2 As shown, the sternum body 10 has a weight-reducing hole 14 , through which the weight-reducing hole 14 can be used to reduce the weight of the sternum body 10 without affecting the structural strength of the sternum body 10 .

[0053] In this embodiment, the sternum body 10 has a first porous structure, which can achieve the attachment of soft tissue and accelerate the fusion speed between the artificial sternum and the patient.

[0054] Among them, the sternum connecting part 11 has a second porous structure, and the use of the second porous structure can achieve a long-term bone fusion effect and achieve better long-term stability.

[0055] It should be noted that the polishing treatment of the inner side surface of the sternum body 10 can reduce the stimulation and friction of the soft tissue.

[0056] The inner side of the sternum body 10 refers to the side of the sternum facing the chest cavity.

[0057] like Figure 2 As shown, the artificial sternum includes two clavicle connectors 20, and the sternum body 10 has two symmetrically arranged sterno-clavicular connecting parts 12. The two clavicle connectors 20 are arranged corresponding to the two sterno-clavicular connecting parts 12. By setting the two sterno-clavicular connecting parts 12, both sides of the sternum body 10 can realize a retractable structure, further enhancing the degree of freedom between the sternum and the clavicle.

[0058] In this embodiment, the sternum body 10 has at least two sterno-rib connecting parts 13 that are symmetrically arranged. The above structure can achieve length adjustment between the sternum body 10 and each rib, further enhancing the degree of freedom between the sternum and the ribs, thereby increasing the capacity of the chest cavity and achieving the ups and downs and movement of chest cavity breathing.

[0059] It should be noted that the connection parts between the artificial sternum and the sternum, ribs and clavicle are all equipped with microporous structures to facilitate the growth of bone cells. The microporous structure is an interconnected multi-directional microporous structure with a pore diameter of 800μm. The pores are conducive to the creeping growth of bone cells. After the operation, the joint surface of the artificial sternum will fuse with the physiological bone structure to achieve long-term stability.

[0060] In this embodiment, the artificial sternum is made of medical metals, including but not limited to titanium and titanium alloys, cobalt alloys, stainless steel, tantalum metal and magnesium alloys. Such metal materials are specified in the ISO-5830 series of international standards, and their biocompatibility has been confirmed by many years of practice in orthopedic implant applications at home and abroad.

[0061] The application of the artificial sternum provided in this embodiment has the following beneficial effects:

[0062] (1) Since the sterno-clavicular connection part 12 is a retractable structure, the first joint 40 can make the clavicle connection part 20 form a movable joint connection relative to the sterno-clavicular connection part 12, and the length of the rib connection part 30 is adjustable, and the second joint 50 can make the rib connection part 30 form a movable joint connection relative to the sterno-costal connection part 13. Therefore, the degree of freedom between the artificial sternum and the ribs and between the artificial sternum and the clavicle is enhanced, thereby achieving better postoperative efficacy and providing better postoperative activity effects. It can not only achieve the reconstruction of the thorax, but also adjust the size of the chest cavity during breathing, reduce the generation of postoperative respiratory oppression, and achieve the ups and downs and activities of chest breathing;

[0063] (2) The filamentary structure 1211 composed of the first filamentary thread 1212 and the second filamentary thread 1213 can enhance the utilization of space, thereby arranging a sufficient number of the first filamentary thread 1212 and the second filamentary thread 1213 in a limited space, thereby maintaining the scalability of the filamentary structure 1211 without affecting the strength of the filamentary structure 1211;

[0064] (3) The inner surface of the sternum body 10 is polished to reduce irritation and friction of soft tissues.

[0065] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0066] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0067] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually 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. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0068] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0069] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An artificial sternum, characterized in that: The artificial sternum comprises: The sternum body (10) comprises a sternum connection part (11), a sterno-clavicular connection part (12) and a sterno-costal connection part (13), wherein the sternum connection part (11) is located at the lower end of the sternum body (10), the sterno-clavicular connection part (12) is a retractable structure, the sterno-clavicular connection part (12) is located at the side wall of the upper end of the sternum body (10), and the sterno-costal connection part (13) is arranged on the side wall of the sternum body (10) and is located between the sterno-clavicular connection part (12) and the sternum connection part (11); A clavicle connecting piece (20), one end of which is connected to the sterno-clavicular connecting portion (12), and the other end of which is connected to the clavicle; A rib connecting piece (30), one end of the rib connecting piece (30) is connected to the sterno-rib connecting portion (13), the other end of the rib connecting piece (30) is connected to the rib, and the length of the rib connecting piece (30) is adjustable; The sterno-clavicular connection part (12) comprises a telescopic section (121), the telescopic section (121) can be telescoped along the extension direction of the sterno-clavicular connection part (12), the telescopic section (121) comprises a filamentary structure (1211), the filamentary structure (1211) comprises a plurality of first silk threads (1212) and a plurality of second silk threads (1213), the plurality of first silk threads (1212) and the plurality of second silk threads (1213) are arranged in a one-to-one correspondence, the first silk threads (1212) and the second silk threads (1213) are both wavy structures, the wave crests of the first silk threads (1212) correspond to the wave troughs of the second silk threads (1213), the wave troughs of the first silk threads (1212) correspond to the wave crests of the second silk threads (1213), and the first silk threads (1212) and the second silk threads (1213) of the filamentary structure (1211) are arranged in an alternating manner; A first joint (40) is provided between the sterno-clavicular connecting portion (12) and the clavicle connecting piece (20), and the sterno-clavicular connecting portion (12) and the clavicle connecting piece (20) are movably connected via the first joint (40).

2. The artificial sternum according to claim 1, characterized in that: The sterno-clavicular connection part (12) also includes a first section (122) and a second section (123), the telescopic section (121) is located between the first section (122) and the second section (123), the first section (122) is connected to the sternum body (10), the second section (123) is connected to the clavicle connection piece (20), the two ends of the first silk thread (1212) are respectively connected to the first section (122) and the second section (123), and the two ends of the second silk thread (1213) are respectively connected to the first section (122) and the second section (123).

3. The artificial sternum according to claim 1, characterized in that: The diameters of the first wire (1212) and the second wire (1213) are both between 0.8 mm and 1.2 mm; and / or, The total number of the first threads (1212) and the second threads (1213) is between 15 and 25.

4. The artificial sternum according to any one of claims 1 to 3, characterized in that: The rib connecting member (30) includes a sliding cavity member (31) and a connecting rod (32), wherein one end of the sliding cavity member (31) facing the sternum body (10) has a sliding hole (311), and the connecting rod (32) can be movably inserted into the sliding hole (311), and the outer wall of the connecting rod (32) is sealed with the hole wall of the sliding hole (311), the sliding cavity member (31) is connected to the rib, and the connecting rod (32) is connected to the sterno-rib connecting part (13).

5. The artificial sternum according to claim 4, characterized in that: The rib connecting member (30) further comprises a sealing ring (33), wherein the sealing ring (33) is sleeved on the outer wall of the connecting rod (32) and is located in the sliding hole (311), and the outer edge and the inner edge of the sealing ring (33) are respectively in contact with the hole wall of the sliding hole (311) and the outer wall of the connecting rod (32).

6. The artificial sternum according to any one of claims 1 to 3, characterized in that: The first joint (40) comprises a first joint recess (41) and a first sphere (42); one end of the sternoclavicular connecting portion (12) facing the clavicle connecting piece (20) has a first joint recess (41); the clavicle connecting piece (20) has a protruding first sphere (42); and the first sphere (42) is inserted into the first joint recess (41).

7. The artificial sternum according to any one of claims 1 to 3, characterized in that: A second joint (50) is provided between the sterno-costal connecting portion (13) and the rib connecting member (30), and the sterno-costal connecting portion (13) and the rib connecting member (30) are movably connected via the second joint (50); The second joint (50) includes a second joint recess (51) and a second sphere (52), and the end of the sternocostal connecting portion (13) facing the rib connecting piece (30) has a second joint recess (51), and the rib connecting piece (30) has a protruding second sphere (52), and the second sphere (52) is inserted into the second joint recess (51).

8. The artificial sternum according to claim 1, characterized in that: The sternum body (10) has a weight-reducing hole (14); The sternum body (10) has a first porous structure; The sternum connecting portion (11) has a second porous structure; The inner side surface of the sternum body (10) is polished; The artificial sternum comprises two clavicle connecting members (20), the sternum body (10) has two symmetrically arranged sterno-clavicular connecting parts (12), and the two clavicle connecting members (20) are arranged correspondingly to the two sterno-clavicular connecting parts (12); The sternum body (10) has at least two sternocostal connecting parts (13) which are symmetrically arranged.

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