Intervertebral fusion prostheses and intervertebral fusion prosthesis assemblies

Abstract

The application provides an intervertebral fusion prosthesis and an intervertebral fusion prosthesis assembly, the intervertebral fusion prosthesis comprising: an outer shell, the outer shell being provided with a first conduction nail hole; a first bone conduction nail, the first bone conduction nail being arranged in the first conduction nail hole and extending out of the outer shell, the first bone conduction nail comprising a first connecting head, a first nail barrel and a first bone conduction body arranged in the first nail barrel, the outer side wall of the first nail barrel being provided with a first threaded structure, the first connecting head being provided with a first butt joint groove and the first butt joint groove being communicated with the accommodating cavity; a first adjusting body being provided with a first bone conduction block; a second bone conduction body being arranged in the first connecting barrel, the first connecting barrel extending into the first bone conduction block, and the end of the first connecting barrel being inserted into the first butt joint groove. The technical scheme of the application effectively solves the problem that the effect of the intervertebral fusion prosthesis in promoting bone ingrowth is poor in the related art, and the long-term stability of the intervertebral fusion prosthesis after implantation is poor.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more specifically, to an interbody fusion prosthesis and an interbody fusion prosthesis assembly. Background Technology

[0002] In the field of spinal orthopedics, interbody fusion is a widely used treatment method, mainly used to repair spinal instability caused by degenerative changes, fractures, tumors, etc.

[0003] The main component of the interbody fusion prosthesis in this technology is a fixation frame designed to provide immediate spinal stability. The outer surface of the endplate of the prosthesis contacts the cortical bone region of the vertebral endplate. Since the cortical bone region of the vertebral endplate is mineralized and lacks bone growth cells that promote bone growth, this limits the bio-ingrowth between the human bone tissue and the prosthesis, reducing the bone fusion effect and thus affecting the bone ingrowth rate.

[0004] Therefore, the interbody fusion prosthesis in related technologies is not very effective in promoting bone ingrowth, resulting in poor long-term stability after implantation. Summary of the Invention

[0005] The main objective of this invention is to provide an interbody fusion prosthesis and an interbody fusion prosthesis assembly to solve the problem that interbody fusion prostheses in related technologies are not effective in promoting bone ingrowth, resulting in poor long-term stability after implantation.

[0006] To achieve the above objectives, according to one aspect of the present invention, an interbody fusion prosthesis is provided, comprising: an outer shell having a receiving cavity and an installation opening communicating with the receiving cavity, and a first conduction screw hole provided on the outer shell; a first bone conduction screw passing through the first conduction screw hole and extending out of the outer shell, the first bone conduction screw including a first connector, a first screw cylinder and a first bone conduction body disposed within the first screw cylinder, the first screw cylinder having a first bone extension hole communicating with the inner hole of the first screw cylinder, a first threaded structure being provided on the outer side wall of the first screw cylinder, the outer diameter of the first connector being larger than the outer diameter of the first screw cylinder, the first connector having a first mating groove communicating with the receiving cavity; a first adjustment body having a first bone conduction block disposed within the first adjustment body, the first adjustment body being disposed within the receiving cavity; a first connecting cylinder and a second bone conduction body, the second bone conduction body being disposed within the first connecting cylinder, the first connecting cylinder extending into the first bone conduction block, and the end of the first connecting cylinder being inserted into the first mating groove; and a connecting body disposed within the receiving cavity.

[0007] Furthermore, the first adjusting body includes a first block and a second block, at least one of the first block and the second block is provided with a placement groove, and the first bone conduction block is disposed in the placement groove; the first connecting cylinder is provided with a second bone elongation hole, the second bone elongation hole connects the inner hole of the first connecting cylinder and the placement groove, the outer side wall of the first connecting cylinder is provided with a second thread structure, and the first connecting cylinder connects the first block and the second block.

[0008] Furthermore, at least one of the first block and the second block is provided with a bone graft chamber, which is connected to the placement slot.

[0009] Furthermore, the end of the first connecting cylinder protrudes from the surface of the first adjusting body and is inserted into the first mating groove; or, the end of the first connecting cylinder is flush with the surface of the first adjusting body, the first connector protrudes from the inner wall of the outer housing, and the first adjusting body is provided with a receiving groove surrounding the end of the first connecting cylinder, and the first connector is inserted into the receiving groove.

[0010] Furthermore, the first nail cylinder includes a threaded cylinder and a self-tapping tapered end disposed at one end of the threaded cylinder opposite to the first connector, and the first threaded structure is disposed on the threaded cylinder; the first bone elongated inlet hole includes a through hole disposed on the threaded cylinder and an elongated hole disposed on the self-tapping tapered end, and there are multiple through holes, which are spaced apart on the threaded cylinder.

[0011] Furthermore, the first modulator, the connector, and the first bone conduction block are all trabecular bone structures; the porosity of the first bone conduction block is greater than that of the first modulator, and the porosity of the first bone conduction block is greater than that of the connector; and / or, the first bone conduction block is made of magnesium alloy material.

[0012] Furthermore, the outer shell is also provided with a second conduction screw hole. The interbody fusion prosthesis also includes a second bone conduction screw, a second adjustment body, and a second connecting tube. The second adjustment body is disposed in the receiving cavity, and the connecting body is disposed between the first adjustment body and the second adjustment body. The second bone conduction screw passes through the second conduction screw hole and extends out of the outer shell. The second bone conduction screw includes a second connector, a second screw cylinder, and a third bone conduction body disposed in the second screw cylinder. The second screw cylinder is provided with a third bone extension hole communicating with the inner hole of the second screw cylinder. A third thread structure is provided on the outer wall of the second screw cylinder. The outer diameter of the second connector is larger than the outer diameter of the second screw cylinder. The second connector is provided with a second mating groove, and the second mating groove communicates with the receiving cavity. A second bone conduction block is disposed in the second adjustment body. A fourth bone conduction body is disposed in the second connecting tube. The second connecting tube extends into the second bone conduction block, and the end of the second connecting tube is inserted into the second mating groove.

[0013] According to another aspect of the present invention, an interbody fusion prosthesis assembly is provided, including an interbody fusion prosthesis and an assembly tool. The interbody fusion prosthesis is the aforementioned interbody fusion prosthesis. A first adjusting body is provided with a first arc-shaped adjusting hole, and a second adjusting body is provided with a second arc-shaped adjusting hole. The assembly tool includes: an adjuster, which includes a rotating member and a first rod and a second rod spaced apart on the rotating member. The first rod can be inserted into the first arc-shaped adjusting hole, and the second rod can be inserted into the second arc-shaped adjusting hole. A guide sleeve has a guide channel, with a first opening and a second opening formed at opposite ends of the guide channel. The first adjusting body and the second adjusting body can be disposed within the guide channel and guided and engaged with the guide sleeve. The rotating member rotates to drive the first rod and the second rod to swing, thereby driving the first adjusting body and the second adjusting body to move closer to each other through the first arc-shaped adjusting hole and the second arc-shaped adjusting hole.

[0014] Furthermore, after the axes of the first rod and the second rod rotate one revolution, they together form a base circle. The base circle includes a first arc length and a second arc length that is opposite to the first arc length. The center line of the first arc-shaped adjustment hole is the involute of the first arc length, and the center line of the second arc-shaped adjustment hole is the involute of the second arc length.

[0015] Furthermore, the regulator also includes a first screw, and the rotating component includes a rotating cylinder movably sleeved on the first screw and a connecting block connected to the rotating cylinder. The first rod body and the second rod body are spaced apart on the connecting block, and the inner wall of the rotating cylinder is provided with a first internal thread, which is threaded with the first screw.

[0016] Furthermore, the first adjusting body is provided with a first opening groove, and the second adjusting body is provided with a second opening groove. The first adjusting body and the second adjusting body are close to each other so that the first opening groove and the second opening groove form a clamping hole. The wall of the clamping hole is provided with a second internal thread. The adjuster also includes a second screw movably disposed in the first screw. The first screw is provided with an internal threaded hole extending along its axial direction. The second screw is threadedly engaged with the internal threaded hole. The first end of the second screw extends out of the first end of the first screw and is located between the first rod body and the second rod body. The second end of the second screw extends out of the second end of the first screw.

[0017] Furthermore, the guide sleeve is provided with a plug rod, and the outer housing is provided with a plug hole. The plug rod is inserted into the plug hole so that the first opening aligns with the installation opening.

[0018] According to the technical solution of this invention, the interbody fusion prosthesis includes: an outer shell, a first bone conduction screw, a first adjustment body, a first connecting cylinder, a second bone conduction body, and a connector. The outer shell has a receiving cavity and an installation opening communicating with the receiving cavity. The outer shell has a first bone conduction screw hole. The first bone conduction screw passes through the first bone conduction screw hole and extends out of the outer shell. The first bone conduction screw includes a first connector, a first screw cylinder, and a first bone conduction body disposed within the first screw cylinder. The first screw cylinder has a first bone extension hole communicating with its inner bore. A first threaded structure is provided on the outer wall of the first screw cylinder. The outer diameter of the first connector is larger than the outer diameter of the first screw cylinder. The first connector has a first mating groove communicating with the receiving cavity. A first bone conduction block is disposed within the first adjustment body, which is located within the receiving cavity. The second bone conduction body is located within the first connecting cylinder, which extends into the first bone conduction block, and its end is inserted into the first mating groove. The connector is located within the receiving cavity. Thus, the installation opening on the outer shell facilitates the assembly of the first adjustment body and the connector into the receiving cavity. The first bone conduction screw facilitates a stable and reliable connection between the outer shell and the vertebral body. Furthermore, the first threaded structure on the first screw barrel of the first bone conduction screw facilitates mechanical fixation between the screw and the vertebral body, allowing the tip of the screw to extend into the cancellous bone region rich in bone growth cells within the vertebral body. The first screw barrel and the first bone conductor within it enable bone growth cells in the cancellous bone region rich in bone growth cells within the vertebral body to interact with the first bone ingrowth hole and the first bone conductor, inducing bone growth cells to grow into the first bone conductor, thereby promoting bone fusion and ultimately forming a strong bone tissue connection, improving the long-term stability of the interbody fusion prosthesis after implantation. The outer diameter of the first connector is larger than the outer diameter of the first screw barrel, facilitating the stop fit between the first connector and the outer shell, thus making the connection between the first bone conduction screw and the outer shell more reliable. The first docking groove and the first connecting sleeve facilitate the positioning and fixation of the relative positions between the outer shell and the first adjusting body, as well as the positioning and fixation of the first bone conduction screw and the first connecting sleeve. This allows the first bone conduction element within the first bone conduction screw to correspond with the second bone conduction element within the first connecting sleeve, enabling bone growth cells within the first bone conduction element to grow into the second bone conduction element. The first connecting sleeve extends into the first bone conduction block, allowing bone growth cells within the second bone conduction element to grow into the first bone conduction block of the first adjusting body. Furthermore, the first connecting sleeve requires a certain clearance space when docking with the first docking groove; the connecting body fills the remaining space after docking, thus filling the receiving cavity of the outer shell and improving the overall structural strength of the interbody fusion prosthesis.In summary, by incorporating the first osteoconductor, the second osteoconductor, and the first osteoconducting block, bone growth cells in the cancellous bone region rich in bone growth cells within the vertebral body can grow into the first osteoconducting block within the first regulator, thereby improving the bone ingrowth promotion effect of the interbody fusion prosthesis and enhancing its long-term stability after implantation. Therefore, the technical solution of this application effectively solves the problem of poor bone ingrowth promotion in related technologies, resulting in poor long-term stability after interbody fusion prosthesis implantation. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0020] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the interbody fusion prosthesis according to the present invention is shown;

[0021] Figure 2 It shows Figure 1 A partial exploded structural diagram of the interbody fusion prosthesis without showing the outer shell, the first bone conduction screw, and the second bone conduction screw;

[0022] Figure 3 It shows Figure 1 Cross-sectional schematic diagram of the external shell, first bone conduction screw and second bone conduction screw of the interbody fusion prosthesis;

[0023] Figure 4 It shows Figure 1 A cross-sectional schematic diagram of the external shell of the interbody fusion prosthesis;

[0024] Figure 5 It shows Figure 1 A cross-sectional schematic diagram of the first adjustment body of the interbody fusion prosthesis;

[0025] Figure 6 It shows Figure 1 A cross-sectional schematic diagram of an interbody fusion prosthesis;

[0026] Figure 7 It shows Figure 1 A partial sectional view of the connection between the first bone conduction nail and the first connecting tube of the interbody fusion prosthesis;

[0027] Figure 8 It shows Figure 1 A three-dimensional structural diagram of the first bone conduction nail in an interbody fusion prosthesis;

[0028] Figure 9A three-dimensional structural schematic diagram of an embodiment of an interbody fusion prosthesis assembly according to the present invention is shown;

[0029] Figure 10 It shows Figure 9 A three-dimensional structural diagram of the guide sleeve of the interbody fusion prosthesis component;

[0030] Figure 11 It shows Figure 9 A three-dimensional structural diagram of the assembly tool for the interbody fusion prosthesis component;

[0031] Figure 12 It shows Figure 9 An exploded view of the assembly tooling for the interbody fusion prosthesis component.

[0032] The above figures include the following reference numerals:

[0033] 10. Outer housing; 11. Receiving cavity; 12. Mounting opening; 13. First conductive pin hole; 14. Second conductive pin hole; 15. Insertion hole;

[0034] 20. First bone conduction nail; 21. First connector; 211. First mating groove; 22. First nail cylinder; 221. First bone extension hole; 222. Threaded cylinder; 223. Self-tapping tapered end; 23. First bone conduction body;

[0035] 30. Second bone conduction nail; 31. Second connector; 32. Second nail cylinder; 33. Third bone conduction body;

[0036] 40. First adjustment body; 41. First block; 42. Second block; 43. Placement slot; 44. Bone graft chamber; 45. First bone conduction block; 46. First arc-shaped adjustment hole; 47. First opening slot;

[0037] 50. Second adjustment body; 51. Second bone conduction block; 52. Second arc-shaped adjustment hole; 53. Second opening groove;

[0038] 60. First connecting tube; 61. Second bone extension port; 62. Second bone conduction body;

[0039] 70. Second connecting tube; 71. Fourth bone conduction device;

[0040] 80. Connector;

[0041] 90. Regulator; 91. Rotating component; 911. Rotating drum; 912. Connecting block; 92. First rod; 93. Second rod; 94. First screw; 95. Second screw;

[0042] 100. Guide sleeve; 110. Guide channel; 120. Insert rod. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0045] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0046] In this embodiment, as Figures 1 to 7As shown, the interbody fusion prosthesis includes: an outer shell 10, a first bone conduction screw 20, a first adjustment body 40, a first connecting cylinder 60, a second bone conduction body 62, and a connector 80. The outer shell 10 has a receiving cavity 11 and an installation opening 12 communicating with the receiving cavity 11. The outer shell 10 is provided with a first bone conduction screw hole 13. The first bone conduction screw 20 passes through the first bone conduction screw hole 13 and extends out of the outer shell 10. The first bone conduction screw 20 includes a first connector 21, a first screw cylinder 22, and a first bone conduction body 23 disposed in the first screw cylinder 22. The first screw cylinder 22 is provided with a first bone extension hole 221 communicating with the inner hole of the first screw cylinder 22. A first threaded structure is provided on the outer side wall of the first screw cylinder 22. The outer diameter of the first connector 21 is larger than the outer diameter of the first screw cylinder 22. The first connector 21 is provided with a first mating groove 211 and the first connector 21 is located in the receiving cavity 11. A first bone conduction block 45 is disposed within a first adjusting body 40, which is located within a receiving cavity 11. A second bone conduction body 62 is disposed within a first connecting cylinder 60, which extends into the first bone conduction block 45, with its end inserted into a first docking groove 211. A connecting body 80 is disposed within the receiving cavity 11.

[0047] Thus, the mounting opening 12 on the outer shell 10 facilitates the assembly of the first adjusting body 40 and the connecting body 80 into the receiving cavity 11. The first bone conduction nail 20 facilitates a stable and reliable connection between the outer shell 10 and the human vertebral body. Furthermore, the first threaded structure on the first nail cylinder 22 of the first bone conduction nail 20 facilitates the mechanical fixation of the first bone conduction nail 20 to the human vertebral body and allows the end of the first bone conduction nail 20 to extend into the cancellous bone region rich in bone growth cells inside the human vertebral body. The first nail cylinder 22 of the first bone conduction nail 20 and the first bone conductor 23 within the first nail cylinder 22 allow bone growth cells in the cancellous bone region rich in bone growth cells inside the human vertebral body to cooperate with the first bone growth inlet 221 and the first bone conductor 23, inducing bone growth cells to grow into the first bone conductor 23, thereby promoting bone fusion and ultimately forming a strong bone tissue connection, improving the long-term stability after intervertebral fusion prosthesis implantation. The outer diameter of the first connector 21 is larger than the outer diameter of the first nail cylinder 22, which facilitates the stop fit between the first connector 21 and the outer shell 10, making the connection between the first bone conduction nail 20 and the outer shell 10 more reliable. The first mating groove 211 and the first connecting cylinder 60 facilitate the positioning and fixing of the relative position between the outer shell 10 and the first adjusting body 40, and also facilitate the positioning and fixing of the first bone conduction nail 20 and the first connecting cylinder 60. This allows the first bone conduction element 23 in the first bone conduction nail 20 to correspond with the second bone conduction element 62 in the first connecting cylinder 60, so that the bone growth cells in the first bone conduction element 23 can grow into the second bone conduction element 62. The first connecting cylinder 60 extends into the first bone conduction block 45, so that the bone growth cells in the second bone conduction element 62 can grow into the first bone conduction block 45 of the first adjusting body 40. Furthermore, a certain amount of clearance is required when the first connecting cylinder 60 mates with the first docking groove 211. The connecting body 80 can fill the remaining space after the first connecting cylinder 60 and the first docking groove 211 mate, thereby filling the receiving cavity 11 of the outer shell 10 and improving the overall structural strength of the intervertebral fusion prosthesis. In summary, through the arrangement of the first bone conduction body 23, the second bone conduction body 62, and the first bone conduction block 45, bone growth cells in the cancellous bone region rich in bone growth cells inside the human vertebral body can grow into the first bone conduction block 45 within the first regulating body 40, thereby improving the effect of the intervertebral fusion prosthesis in promoting bone ingrowth and improving the long-term stability of the intervertebral fusion prosthesis after implantation. Therefore, the technical solution of this embodiment effectively solves the problem of poor effect of intervertebral fusion prostheses in promoting bone ingrowth in related technologies, resulting in poor long-term stability of the intervertebral fusion prosthesis after implantation.

[0048] In this embodiment, the end face of the first bone conduction element 23 protrudes from the bottom surface of the first docking groove 211, and the end face of the second bone conduction element 62 is located inside the first connecting cylinder 60, so that when the first connecting cylinder 60 is docked with the first docking groove 211, the end face of the first bone conduction element 23 can contact the end face of the second bone conduction element 62, thereby facilitating bone ingrowth. The first conduction nail hole 13 includes a first hole section and a second hole section. The inner sidewall of the first hole section is provided with an internal thread, and the second hole section is a smooth hole. The diameter of the second hole section is larger than the diameter of the first hole section. The first connector 21 is disposed in the second hole section, and the first thread structure on the first nail cylinder 22 is threadedly engaged with the internal thread on the first hole section to facilitate the connection between the first bone conduction nail 20 and the outer shell 10. The first adjusting body 40 and the connecting body 80 are separate structures.

[0049] In this embodiment, the outer shell 10 includes an upper endplate and a lower endplate corresponding to the endplates of the human body, and a connecting plate connecting the upper and lower endplates, with the upper and lower endplates arranged opposite to each other. The inner wall of the receiving cavity 11 of the outer shell 10 is provided with mounting screw holes. A tool with a threaded section is used to engage with the mounting screw holes to facilitate the implantation of the outer shell 10 into the intervertebral space of the human vertebral body. The outer shell 10 is manufactured using 3D printing technology and is made of titanium alloy. Both the upper and lower endplates are trabecular bone structures and have undergone anodizing treatment.

[0050] In other embodiments, the end face of the first bone conduction body 23 is flush with the bottom surface of the first docking groove 211.

[0051] like Figure 5 and Figure 6 As shown, the first adjusting body 40 includes a first block 41 and a second block 42. At least one of the first block 41 and the second block 42 is provided with a placement groove 43, and the first bone conduction block 45 is disposed in the placement groove 43. The first connecting cylinder 60 is provided with a second bone growth inlet hole 61, which connects the inner hole of the first connecting cylinder 60 and the placement groove 43. The outer wall of the first connecting cylinder 60 is provided with a second threaded structure, and the first connecting cylinder 60 connects the first block 41 and the second block 42. The separate arrangement of the first block 41 and the second block 42 facilitates the processing of the placement groove 43 and the assembly of the first bone conduction block 45. The opening of the second bone growth inlet hole 61 allows bone growth cells to grow from the second bone conduction body 62 into the first bone conduction block 45, thereby accelerating the growth and fusion of bone tissue. In addition, the second threaded structure ensures that the first connecting cylinder 60 can securely connect the first block 41 and the second block 42, which strengthens the structural strength of the intervertebral fusion prosthesis and facilitates the assembly operation of the first adjusting body 40.

[0052] In other embodiments, the first adjustment body 40 is a porous structure or a trabecular bone structure, and the second bone ingrowth hole 61 can also connect the inner hole of the first connecting cylinder 60 with the first adjustment body 40, thereby facilitating bone ingrowth into the first adjustment body 40.

[0053] like Figure 5 and Figure 6 As shown, at least one of the first block 41 and the second block 42 is provided with a bone graft chamber 44, which is connected to the placement groove 43. This connection between the bone graft chamber 44 and the placement groove 43 provides a direct source of nutrition and growth space for bone growth cells. The bone graft chamber 44 can accommodate more autologous bone fragments or other bone filling materials, which are rich in bone growth cells. This facilitates the rapid proliferation and outward diffusion of bone growth cells near the bone graft chamber 44, improving bone ingrowth efficiency and accelerating the intervertebral fusion process.

[0054] In this embodiment, the bone graft chamber 44 is disposed on the side of the placement groove 43 away from the first bone conduction nail 20.

[0055] like Figure 2 as well as Figures 5 to 8 As shown, the end of the first connecting cylinder 60 protrudes from the surface of the first adjusting body 40 and is inserted into the first mating groove 211. In this way, the protruding end of the first connecting cylinder 60 facilitates mating with the first mating groove 211, thereby facilitating the assembly operation of the first adjusting body 40 within the outer housing 10.

[0056] In this embodiment, the end of the first connecting cylinder 60 is inserted into the first docking groove 211, so that when the first connecting cylinder 60 is docked with the first bone conduction nail 20, the surface of the first adjusting body 40 facing away from the mounting opening 12 contacts the inner sidewall of the outer housing 10 opposite to the mounting opening 12. Thus, when the surface of the first adjusting body 40 facing away from the mounting opening 12 contacts the inner sidewall of the outer housing 10 opposite to the mounting opening 12, the first adjusting body 40 is driven to move closer to the first bone conduction nail 20. The inner sidewall of the outer housing 10 opposite to the mounting opening 12 can guide the first adjusting body 40, thereby facilitating the docking operation between the end of the first connecting cylinder 60 and the first docking groove 211, improving assembly accuracy and efficiency.

[0057] In other embodiments, the end of the first connecting cylinder 60 is flush with the surface of the first adjusting body 40, the first connecting head 21 protrudes from the inner wall of the outer housing 10, and the first adjusting body 40 is provided with a receiving groove surrounding the end of the first connecting cylinder 60, into which the first connecting head 21 is inserted. This protruding design of the first connecting head 21 facilitates the docking of the end of the first connecting cylinder 60 with the first docking groove 211, thereby facilitating the assembly operation of the first adjusting body 40 within the outer housing 10.

[0058] like Figure 8 As shown, the first nail cylinder 22 includes a threaded cylinder 222 and a self-tapping tapered end 223 disposed at the end of the threaded cylinder 222 opposite to the first connector 21. The first threaded structure is disposed on the threaded cylinder 222. The first bone conduction insertion hole 221 includes a through hole disposed on the threaded cylinder 222 and an elongated hole disposed on the self-tapping tapered end 223. There are multiple through holes, which are spaced apart on the threaded cylinder 222. The self-tapping tapered end 223 facilitates the connection between the first bone conduction nail 20 and the human vertebral body, improving the connection efficiency and stability between the first bone conduction nail 20 and the human vertebral body. The multiple through holes facilitate the ingrowth of bone growth cells from the circumferential outer side of the first nail cylinder 22 into the first bone conduction body 23. The elongated hole facilitates the ingrowth of bone growth cells from the end of the first nail cylinder 22 into the first bone conduction body 23. Furthermore, since the self-tapping cone end 223 is located at the end of the first bone conduction nail 20, the self-tapping cone end 223 can be inserted into the endplate of the human vertebral body to a greater depth. The self-tapping cone end 223 can extend into the location with more bone growth cells. The setting of a large area of ​​elongated hole can increase the speed of bone growth cell ingrowth and meet the structural strength requirements of the self-tapping cone end 223.

[0059] Furthermore, the first modulator 40, connector 80, and first osteoconducting block 45 are all trabecular bone structures. The trabecular bone structure better simulates the natural bone marrow environment, which is beneficial for the adhesion, proliferation, and differentiation of bone growth cells, promoting the growth of new bone tissue. The porosity of the first osteoconducting block 45 is greater than that of the first modulator 40, and also greater than that of the connector 80. The greater porosity of the first osteoconducting block 45 compared to the first modulator 40 and connector 80 further enhances its ability to promote bone ingrowth. Moreover, since the first osteoconducting block 45 is located inside the first modulator 40, its higher porosity does not affect the overall structural strength of the interbody fusion prosthesis, and it facilitates the ingrowth of bone growth cells into the interior of the first modulator 40, thereby improving the long-term stability of the interbody fusion prosthesis. The first osteoconducting block 45 is made of magnesium alloy. Magnesium alloy is a biodegradable biomaterial, meaning that after bone fusion is complete, the first osteoconducting block 45 can be gradually absorbed by the body, avoiding the foreign body reaction and secondary surgery risks that may result from long-term implantation. This design, combining bioactivity and biodegradability, significantly improves the biocompatibility and safety of the interbody fusion prosthesis. Furthermore, the magnesium alloy material facilitates the growth of bone growth cells from the cancellous bone into the first osteoconductor 23 and the second osteoconductor 62. After the first osteoconducting block 45 degrades, the placement groove 43 is filled with newly grown bone tissue, thereby inducing bone growth and improving the long-term stability of the interbody fusion prosthesis after implantation.

[0060] It should be noted that porosity is a physical quantity that refers to the proportion of pore space inside a material. It reflects the relationship between the volume of the material that is not occupied by solid matter and the total volume.

[0061] In this embodiment, the second bone conductor 62 has a trabecular bone structure, the first bone conductor 23 and the second bone conductor 62 are in direct contact, and both the first bone conductor 23 and the second bone conductor 62 are made of magnesium alloy.

[0062] In other embodiments, the first adjusting body 40, the connecting body 80, and the first bone conduction block 45 are all trabecular bone structures; the porosity of the first bone conduction block 45 is greater than that of the first adjusting body 40, and the porosity of the first bone conduction block 45 is greater than that of the connecting body 80. Alternatively, the first adjusting body 40, the connecting body 80, and the first bone conduction block 45 are all trabecular bone structures; the first bone conduction block 45 is made of magnesium alloy.

[0063] like Figures 1 to 6As shown, the outer shell 10 is also provided with a second bone conduction screw hole 14. The interbody fusion prosthesis also includes a second bone conduction screw 30, a second adjustment body 50, and a second connecting tube 70. The second adjustment body 50 is disposed in the receiving cavity 11, and the connecting body 80 is disposed between the first adjustment body 40 and the second adjustment body 50. The second bone conduction screw 30 passes through the second bone conduction screw hole 14 and extends out of the outer shell 10. The second bone conduction screw 30 includes a second connecting head 31, a second screw tube 32, and a third bone conduction body 33 disposed in the second screw tube 32. The second bone conduction cylinder 32 has a third bone conduction inlet hole communicating with the inner hole of the second nail cylinder 32. A third threaded structure is provided on the outer wall of the second nail cylinder 32. The outer diameter of the second connector 31 is larger than the outer diameter of the second nail cylinder 32. The second connector 31 has a second mating groove communicating with the receiving cavity 11. A second bone conduction block 51 is provided inside the second adjusting body 50. A fourth bone conduction body 71 is located inside the second connecting cylinder 70. The second connecting cylinder 70 extends into the second bone conduction block 51, and its end is inserted into the second mating groove. Thus, the mounting opening 12 on the outer shell 10 facilitates the assembly of the second adjusting body 50 and the connector 80 into the receiving cavity 11. The second bone conduction nail 30 facilitates a stable and reliable connection between the outer shell 10 and the human vertebral body. Furthermore, the third threaded structure on the second screw cylinder 32 of the second bone conduction screw 30 facilitates the mechanical fixation of the second bone conduction screw 30 to the human vertebral body and allows the end of the second bone conduction screw 30 to extend into the cancellous bone region rich in bone growth cells inside the human vertebral body. The second screw cylinder 32 of the second bone conduction screw 30 and the third bone conduction element 33 within the second screw cylinder 32 enable bone growth cells in the cancellous bone region rich in bone growth cells inside the human vertebral body to cooperate with the third bone conduction element 33 through the third bone ingrowth hole, inducing bone growth cells to grow into the third bone conduction element 33, thereby promoting bone fusion and ultimately forming a strong bone tissue connection, improving the long-term stability after interbody fusion prosthesis implantation. The outer diameter of the second connector 31 is larger than the outer diameter of the second screw cylinder 32 and the second connector 31 is located within the receiving cavity 11, facilitating the stop cooperation between the second connector 31 and the outer shell 10, making the connection between the second bone conduction screw 30 and the outer shell 10 more reliable. The second docking groove and the second connecting cylinder 70 facilitate the positioning and fixation of the relative positions between the outer shell 10 and the second adjusting body 50, and also facilitate the positioning and fixation of the second bone conduction nail 30 and the second connecting cylinder 70. This allows the third bone conduction element 33 in the second bone conduction nail 30 to correspond with the fourth bone conduction element 71 in the second connecting cylinder 70, enabling bone growth cells in the third bone conduction element 33 to grow into the fourth bone conduction element 71. The second connecting cylinder 70 extends into the second bone conduction block 51, allowing bone growth cells in the fourth bone conduction element 71 to grow into the second bone conduction block 51 of the second adjusting body 50.Furthermore, a certain amount of clearance is required when the second connecting cylinder 70 aligns with the second docking groove. The connecting body 80 fills the remaining space after the second connecting cylinder 70 aligns with the second docking groove, thereby filling the receiving cavity 11 of the outer shell 10 and improving the overall structural strength of the interbody fusion prosthesis. In summary, through the arrangement of the third bone conduction body 33, the fourth bone conduction body 71, and the second bone conduction block 51, bone growth cells in the cancellous bone region rich in bone growth cells within the vertebral body can grow into the second bone conduction block 51 within the second regulating body 50, thereby improving the effect of the interbody fusion prosthesis in promoting bone ingrowth and enhancing the long-term stability of the interbody fusion prosthesis after implantation. Therefore, the technical solution of this application effectively solves the problem of poor bone ingrowth promotion in related technologies, resulting in poor long-term stability of the interbody fusion prosthesis after implantation.

[0064] Furthermore, the above-mentioned design allows more and more uniform bone growth cells to grow into the cavity 11 of the interbody fusion prosthesis, enabling bone ingrowth to occur on both sides of the connector 80, thereby further improving the long-term stability of the interbody fusion prosthesis after implantation.

[0065] In this embodiment, the specific structure of the second adjusting body 50 is set with reference to the first adjusting body 40.

[0066] In this embodiment, the first bone conduction block 45, the second bone conduction block 51, the first bone conductor 23, the second bone conductor 62, the third bone conductor 33, and the fourth bone conductor 71 are all made of biodegradable materials such as magnesium alloy. The first connector 21, the first nail cylinder 22, the second connector 31, and the second nail cylinder 32 are all made of non-biodegradable materials such as titanium alloy and have all undergone anodizing treatment. The first adjustment body 40 and the second adjustment body 50 are both manufactured using 3D printing technology, both made of titanium alloy, and both have undergone anodizing surface treatment.

[0067] In this embodiment, the first connector 21, the first nail cylinder 22, the second connector 31, the second nail cylinder 32, the first connecting cylinder 60, the second connecting cylinder 70, the outer shell 10, the first adjusting body 40, the second adjusting body 50, and the connecting body 80 are all anodized, which can improve the corrosion resistance of the interbody fusion prosthesis. Elements with bioactivity and antibacterial functions such as Ca, P, Zn, Mn, Ag, and Sr can also be introduced into them, thereby improving the bone ingrowth performance and antibacterial ability of the interbody fusion prosthesis.

[0068] In this embodiment, the connector 80 is provided with a connecting screw hole. A tool with a threaded section is used to engage with the connecting screw hole to facilitate the placement of the connector 80 between the first adjusting body 40 and the second adjusting body 50. The connector 80 has a porous structure or a trabecular bone structure and is anodized. This allows new bone tissue to grow into the interior of the interbody fusion prosthesis, improving long-term stability after implantation and enabling bidirectional bone growth, thus significantly enhancing the bone ingrowth capacity of the interbody fusion prosthesis.

[0069] like Figures 9 to 12As shown, this application also provides an interbody fusion prosthesis assembly, which includes an interbody fusion prosthesis and an assembly tool. The interbody fusion prosthesis is the one described above. A first arc-shaped adjustment hole 46 is provided on a first adjusting body 40, and a second arc-shaped adjustment hole 52 is provided on a second adjusting body 50. The assembly tool includes an adjuster 90 and a guide sleeve 100. The adjuster 90 includes a rotating member 91 and a first rod 92 and a second rod 93 spaced apart on the rotating member 91. The first rod 92 can be inserted into the first arc-shaped adjustment hole 46, and the second rod 93 can be inserted into the second arc-shaped adjustment hole 52. The guide sleeve 100 has a guide channel 110, and the two ends of the guide channel 110 opposite to each other form a first opening and a second opening. The first adjusting body 40 and the second adjusting body 50 can be disposed in the guide channel 110 and guided and engaged with the guide sleeve 100. Rotating component 91 rotates to drive the first rod 92 and the second rod 93 to swing, thereby causing the first adjusting body 40 and the second adjusting body 50 to move closer together through the first arc-shaped adjusting hole 46 and the second arc-shaped adjusting hole 52. Thus, the design of the adjuster 90 allows the first adjusting body 40 and the second adjusting body 50 to move closer or further apart through the swinging of the first rod 92 and the second rod 93, facilitating the adjustment of their relative positions within the outer housing 10 and thus facilitating the assembly of the intervertebral fusion prosthesis. The guide sleeve 100 further optimizes the control of the relative position of the first adjusting body 40 and the second adjusting body 50. Through the guiding engagement of the guide channel 110 with the first adjusting body 40 and the second adjusting body 50, and the docking of the first rod 92 and the second rod 93 with the first arc-shaped adjusting hole 46 and the second arc-shaped adjusting hole 52, the relative positional relationship between the first adjusting body 40 and the second adjusting body 50 can be effectively adjusted to control their movement towards each other under the action of the first rod 92 and the second rod 93. Furthermore, by using the guide sleeve 100 and the adjuster 90, the distance between the first adjuster 40 and the second adjuster 50 can be reduced or even brought into close contact before they are installed into the receiving cavity 11 of the outer shell 10. This reduces the risk of impact between the first adjuster 40 and the second adjuster 50, or other structures thereon, and the inner wall of the outer shell 10 during implantation, thus ensuring the integrity of the outer shell 10 and preventing structural strength weakening due to stress concentration after impact. Since the aforementioned interbody fusion prosthesis can solve the problem of poor bone ingrowth promotion in related technologies, resulting in poor long-term stability after implantation, interbody fusion prosthesis components incorporating this prosthesis can solve the same technical problem.

[0070] In this embodiment, the first adjusting body 40 and the second adjusting body 50 are first placed into the guide channel 110 of the guide sleeve 100 through the first opening. Then, the first rod 92 is inserted into the first arc-shaped adjusting hole 46 of the first adjusting body 40, and the second rod 93 is inserted into the second arc-shaped adjusting hole 52 of the second adjusting body 50. By rotating the rotating member 91, the first rod 92 and the second rod 93 are driven to swing around the axis of the rotating member 91, and the first adjusting body 40 and the second adjusting body 50 are driven to move closer together until they fit together. By using a pushing assembly tool, the fitted first adjusting body 40 and the second adjusting body 50 are pushed into the receiving cavity 11 through the second opening to reduce the height of the first adjusting body 40 and the second adjusting body 50, thereby reducing the collision between the first adjusting body 40 and the second adjusting body 50 and other structures on them and the inner wall of the outer shell 10. This ensures the integrity of the outer shell 10 and avoids the problem of weakened structural strength due to stress concentration after the outer shell 10 is hit. Subsequently, when the surfaces of the first adjusting body 40 and the second adjusting body 50 come into contact with the surface of the receiving cavity 11 facing away from the mounting opening 12, the rotating component 91 is rotated, causing the first rod 92 and the second rod 93 to swing around the axis of the rotating component 91, and causing the first adjusting body 40 and the second adjusting body 50 to separate until the first connecting cylinder 60 on the first adjusting body 40 aligns with the first docking groove 211 of the first bone conduction nail 20, and the second connecting cylinder 70 on the second adjusting body 50 aligns with the second docking groove of the second bone conduction nail 30. Thus, when the surface of the first adjusting body 40 facing away from the mounting opening 12 contacts the inner wall of the outer housing 10 opposite the mounting opening 12, the first adjusting body 40 is driven to move closer to the first bone conduction nail 20. The inner wall of the outer housing 10 opposite the mounting opening 12 can guide the first adjusting body 40, thereby facilitating the docking operation of the end of the first connecting cylinder 60 with the first docking groove 211, improving assembly accuracy and efficiency. When the surface of the second adjusting body 50 away from the mounting opening 12 contacts the inner wall of the outer housing 10 relative to the mounting opening 12, the second adjusting body 50 is driven to move closer to the second bone conduction nail 30. The inner wall of the outer housing 10 relative to the mounting opening 12 can guide the second adjusting body 50, thereby facilitating the docking operation between the end of the second connecting cylinder 70 and the second docking groove, improving assembly accuracy and assembly efficiency.

[0071] It should be noted that the vertical relationship in the attached diagram represents the state after the interbody fusion prosthesis has been implanted. During the implantation process, the patient lies supine with the installation opening 12 of the outer shell 10 facing upwards. Therefore, when no connecting body 80 is provided between the first adjusting body 40 and the second adjusting body 50, if subjected to external interference such as vibration, the end of the first connecting cylinder 60 will only be displaced along the axial direction of the first connecting cylinder 60, which will not affect the docking of the end of the first connecting cylinder 60 with the first docking groove 211 after the connecting body 80 is inserted. Similarly, when no connecting body 80 is provided between the first adjusting body 40 and the second adjusting body 50, if subjected to external interference such as vibration, the end of the second connecting cylinder 70 will only be displaced along the axial direction of the second connecting cylinder 70, which will not affect the docking of the end of the second connecting cylinder 70 with the second docking groove after the connecting body 80 is inserted.

[0072] In this embodiment, after the end of the first connecting cylinder 60 is connected to the first docking groove 211 and the end of the second connecting cylinder 70 is connected to the second docking groove, the assembly tool is separated from the first adjusting body 40 and the second adjusting body 50, the guide sleeve 100 is removed, and then the connecting body 80 is placed between the first adjusting body 40 and the second adjusting body 50.

[0073] like Figure 1 as well as Figures 9 to 12 As shown, the axes of the first rod 92 and the second rod 93, after rotating one revolution, together form a base circle. The base circle includes a first arc length and a second arc length opposite to the first arc length. The centerline of the first arc-shaped adjustment hole 46 is the involute of the first arc length, and the centerline of the second arc-shaped adjustment hole 52 is the involute of the second arc length. The specific structural design of the first arc-shaped adjustment hole 46 allows the first rod 92 to drive the first adjustment body 40 to move linearly when it swings. The specific structural design of the second arc-shaped adjustment hole 52 allows the second rod 93 to drive the first adjustment body 40 to move linearly when it swings.

[0074] It should be noted that the definition of an involute is: when a straight line rolls purely on a circle without slipping, the trajectory traced by a point on that straight line is called the involute of that circle. The straight line mentioned above is the linear movement trajectory of the first adjusting body 40 and the second adjusting body 50 in this embodiment, and the circle mentioned above is the base circle in this embodiment.

[0075] like Figures 9 to 12As shown, the regulator 90 also includes a first screw 94, and a rotating component 91 including a rotating cylinder 911 movably sleeved on the first screw 94 and a connecting block 912 connected to the rotating cylinder 911. A first rod body 92 and a second rod body 93 are spaced apart on the connecting block 912. A first internal thread is provided on the inner wall of the rotating cylinder 911, and the first internal thread is threadedly engaged with the first screw 94. The cooperation between the first screw 94, the rotating cylinder 911 sleeved on it, and the connecting block 912 constitutes an efficient and convenient tool. The cooperation between the first internal thread on the inner wall of the rotating cylinder 911 and the first screw 94 allows the rotating cylinder 911 to move along the axial direction of the first screw 94 when rotating, thereby driving the connecting block 912 and the first rod body 92 and the second rod body 93 disposed thereon to swing. This design makes the operation of the regulator 90 more precise and controllable. The user can finely adjust the specific position of the first rod body 92 and the second rod body 93 by rotating the rotating cylinder 911, thereby controlling the proximity of the first adjusting body 40 and the second adjusting body 50. The adjustment mechanism 90 not only simplifies the adjustment process of the first adjustment body 40 and the second adjustment body 50, but also improves the accuracy of adjustment and reduces positional deviation caused by manual operation.

[0076] like Figure 2 as well as Figures 9 to 12As shown, the first adjusting body 40 is provided with a first opening groove 47, and the second adjusting body 50 is provided with a second opening groove 53. The first adjusting body 40 and the second adjusting body 50 are close together so that the first opening groove 47 and the second opening groove 53 form a clamping hole, and the wall of the clamping hole is provided with a second internal thread. The adjuster 90 also includes a second screw 95 movably disposed in the first screw 94. The first screw 94 is provided with an internally threaded hole extending along its axial direction. The second screw 95 is threadedly engaged with the internally threaded hole. The first end of the second screw 95 extends out of the first end of the first screw 94, and the first end of the second screw 95 is located between the first rod body 92 and the second rod body 93. The second end of the second screw 95 extends out of the second end of the first screw 94. The first end and the second end of the second screw 95 respectively extend out of the two ends of the first screw 94. This design allows the second screw 95 to rotate and move axially within the first screw 94. When the first adjusting body 40 and the second adjusting body 50 approach and fit together, the second screw 95 engages with the clamping hole formed by the first opening slot 47 and the second opening slot 53, providing additional tightening force to ensure a secure connection between the first adjusting body 40 and the second adjusting body 50 during assembly. Furthermore, the second screw 95 is located between the first rod 92 and the second rod 93, allowing it to be screwed into the clamping hole when the first rod 92 and the second rod 93 bring the first adjusting body 40 and the second adjusting body 50 into contact. This ensures that the first rod 92 and the second rod 93 maintain the contact between the first adjusting body 40 and the second adjusting body 50 during screwing the second screw 95 into the clamping hole, facilitating the connection between the second screw 95 and the first adjusting body 40 and the second adjusting body 50.

[0077] In this embodiment, when the first adjusting body 40 and the second adjusting body 50 are close together and fitted within the guide channel 110 of the guide sleeve 100, the first opening groove 47 of the first adjusting body 40 and the second opening groove 53 of the second adjusting body 50 form a clamping hole. At this time, the first rod 92 is inserted into the first arc-shaped adjusting hole 46 of the first adjusting body 40, and the second rod 93 is inserted into the second arc-shaped adjusting hole 52 of the second adjusting body 50. Then, the second screw 95 is screwed into the clamping hole to connect the first adjusting body 40 and the second adjusting body 50 through the second screw 95, reducing the relative movement between the first adjusting body 40 and the second adjusting body 50 along the axial direction of the second screw 95. Then, by pushing and moving the assembly tool, the fitted first adjusting body 40 and the second adjusting body 50 are pushed into the receiving cavity 11 through the second opening to complete the assembly step of the intervertebral fusion prosthesis.

[0078] like Figure 1 as well as Figures 9 to 12As shown, the guide sleeve 100 is provided with an insertion rod 120, and the outer housing 10 is provided with an insertion hole 15. The insertion rod 120 is inserted into the insertion hole 15 so that the first opening aligns with the mounting opening 12. The insertion rod 120 on the guide sleeve 100 aligns with the insertion hole 15 on the outer housing 10, ensuring accurate positioning between the guide sleeve 100 and the outer housing 10. Through the precise alignment of the guide channel 110 of the guide sleeve 100 with the mounting opening 12 of the outer housing 10, the assembly tool can accurately and flawlessly deliver the first adjusting body 40 and the second adjusting body 50 into the predetermined positions along the guide channel 110, avoiding deviations during implantation and improving assembly accuracy. The cooperation between the insertion rod 120 and the insertion hole 15 not only simplifies the implantation operation and reduces the difficulty of the surgery, but also helps to reduce the operation time, alleviate the surgical burden on the patient, and ensure the consistency and reliability of the surgical outcome.

[0079] In this embodiment, the interbody fusion prosthesis assembly also includes a bone conduction screw installation tool. The bone conduction screw installation tool includes a handle and a locking block disposed on one side of the handle. The handle and the axis of the locking block are perpendicular, and the locking block can be inserted into a first mating groove 211 or a second mating groove. The locking block matches the shape of the first and second mating grooves so that when the locking block is inserted into the first or second mating groove, it can drive the first bone conduction screw 20 or the second bone conduction screw 30 to rotate synchronously. When the locking block is inserted into the first mating groove 211, by gripping the handle and driving the axis of the handle to swing, the locking block located on one side of the handle can rotate, thereby driving the first bone conduction screw 20 to rotate and screw into the vertebral body. When the locking block is inserted into the second mating groove, by gripping the handle and driving the axis of the handle to swing, the locking block located on one side of the handle can rotate, thereby driving the second bone conduction screw 30 to rotate and screw into the vertebral body.

[0080] In this embodiment, the surface of the first adjusting body 40 facing the receiving cavity 11 is a first arc surface, and the surface of the receiving cavity 11 facing the first adjusting body 40 is a second arc surface, with the first and second arc surfaces fitting together. The surface of the second adjusting body 50 facing the receiving cavity 11 is a third arc surface, and the surface of the receiving cavity 11 facing the second adjusting body 50 is a fourth arc surface, with the third and fourth arc surfaces fitting together. This arrangement ensures a more stable relative position between the first adjusting body 40, the second adjusting body 50, and the outer shell 10, reducing movement of both the first and second adjusting bodies 40 and 50 relative to the outer shell 10 during assembly. It also ensures a more stable relative position of both the first and second adjusting bodies 40 and 50 after assembly, thus improving the stability of the interbody fusion prosthesis during use.

[0081] The inventors discovered that most interbody fusion prostheses currently used in clinical practice are made of titanium alloy and PEEK. Because these materials are bio-inert, they cannot promote bone growth or form a good biological osseointegration with human bone tissue. The release of metal ions from these materials can also pose a risk to the safety and effectiveness of the prosthesis. Bacterial infection of the prosthesis can also affect clinical outcomes.

[0082] In this embodiment, the interbody fusion prosthesis undergoes surface treatment. The surface treatment process can introduce ions with osteogenic and antibacterial properties, improve the corrosion resistance of the interbody fusion prosthesis, enhance its bioactivity, thereby promoting osteogenic and antibacterial properties, improving the clinical application effect and long-term stability of the interbody fusion prosthesis after implantation.

[0083] In the description of this invention, it should be understood that "a plurality of" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0084] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0085] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0086] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An interbody fusion prosthesis, characterized in that, include: An outer housing (10) has a receiving cavity (11) and an installation opening (12) communicating with the receiving cavity (11), and a first conductive pin hole (13) is provided on the outer housing (10). The first bone conduction nail (20) is inserted into the first conduction nail hole (13) and extends out of the outer shell (10). The first bone conduction nail (20) includes a first connector (21), a first nail cylinder (22) and a first bone conduction body (23) disposed in the first nail cylinder (22). The first nail cylinder (22) is provided with a first bone extension hole (221) communicating with the inner hole of the first nail cylinder (22). The outer side wall of the first nail cylinder (22) is provided with a first thread structure. The outer diameter of the first connector (21) is larger than the outer diameter of the first nail cylinder (22). The first connector (21) is provided with a first mating groove (211) and the first mating groove (211) communicates with the receiving cavity (11). A first adjustment body (40) is provided inside the first adjustment body (40), and the first adjustment body (40) is provided inside the receiving cavity (11); A first connecting tube (60) and a second bone conduction body (62), wherein the second bone conduction body (62) is disposed inside the first connecting tube (60), the first connecting tube (60) extends into the first bone conduction block (45), and the end of the first connecting tube (60) is inserted into the first docking groove (211); The connector (80) is disposed within the receiving cavity (11).

2. The interbody fusion prosthesis according to claim 1, characterized in that, The first adjusting body (40) includes a first block (41) and a second block (42). At least one of the first block (41) and the second block (42) is provided with a placement groove (43). The first bone conduction block (45) is disposed in the placement groove (43). The first connecting cylinder (60) is provided with a second bone inlet hole (61). The second bone inlet hole (61) connects the inner hole of the first connecting cylinder (60) with the placement groove (43). The outer side wall of the first connecting cylinder (60) is provided with a second thread structure. The first connecting cylinder (60) connects the first block (41) and the second block (42).

3. The interbody fusion prosthesis according to claim 2, characterized in that, At least one of the first block (41) and the second block (42) is provided with a bone graft chamber (44), which is connected to the placement slot (43).

4. The interbody fusion prosthesis according to claim 1, characterized in that, The end of the first connecting cylinder (60) protrudes from the surface of the first adjusting body (40) and is inserted into the first mating groove (211), or, The end of the first connecting cylinder (60) is flush with the surface of the first adjusting body (40), the first connector (21) protrudes from the inner wall of the outer housing (10), the first adjusting body (40) is provided with a receiving groove surrounding the end of the first connecting cylinder (60), and the first connector (21) is inserted into the receiving groove.

5. The interbody fusion prosthesis according to claim 1, characterized in that, The first nail cylinder (22) includes a threaded cylinder (222) and a self-tapping cone end (223) disposed at one end of the threaded cylinder (222) away from the first connector (21). The first threaded structure is disposed on the threaded cylinder (222). The first bone elongation inlet hole (221) includes a through hole disposed on the threaded cylinder (222) and an elongated hole disposed on the self-tapping cone end (223). There are multiple through holes, and the multiple through holes are disposed at intervals on the threaded cylinder (222).

6. The interbody fusion prosthesis according to claim 1, characterized in that, The first adjustment body (40), the connecting body (80), and the first bone conduction block (45) are all trabecular bone structures; The porosity of the first bone conduction block (45) is greater than that of the first adjustment body (40), and the porosity of the first bone conduction block (45) is greater than that of the connector (80); and / or, The first bone conduction block (45) is made of magnesium alloy.

7. The interbody fusion prosthesis according to claim 1, characterized in that, The outer shell (10) is also provided with a second conduction nail hole (14). The intervertebral fusion prosthesis also includes a second bone conduction nail (30), a second adjustment body (50) and a second connecting tube (70). The second adjustment body (50) is disposed in the receiving cavity (11), and the connecting body (80) is disposed between the first adjustment body (40) and the second adjustment body (50). The second bone conduction nail (30) passes through the second conduction nail hole (14) and extends out of the outer shell (10). The second bone conduction nail (30) includes a second connector (31), a second nail cylinder (32), and a third bone conduction body (33) disposed in the second nail cylinder (32). The second nail cylinder (32) is provided with a third bone extension hole communicating with the inner hole of the second nail cylinder (32). The outer side wall of the second nail cylinder (32) is provided with a third thread structure. The outer diameter of the second connector (31) is larger than the outer diameter of the second nail cylinder (32). The second connector (31) is provided with a second mating groove, and the second mating groove communicates with the receiving cavity (11). The second adjustment body (50) is provided with a second bone conduction block (51), and a fourth bone conduction body (71) is provided in the second connecting cylinder (70). The second connecting cylinder (70) extends into the second bone conduction block (51), and the end of the second connecting cylinder (70) is inserted into the second docking groove.

8. An interbody fusion prosthesis assembly, comprising an interbody fusion prosthesis and assembly tools, characterized in that, The interbody fusion prosthesis is the interbody fusion prosthesis as described in claim 7, wherein the first adjustment body (40) is provided with a first arc-shaped adjustment hole (46), and the second adjustment body (50) is provided with a second arc-shaped adjustment hole (52). The assembly tool includes: The regulator (90) includes a rotating member (91) and a first rod (92) and a second rod (93) spaced apart on the rotating member (91). The first rod (92) can be inserted into the first arc-shaped adjustment hole (46), and the second rod (93) can be inserted into the second arc-shaped adjustment hole (52). The guide sleeve (100) has a guide channel (110). The two ends of the guide channel (110) are arranged opposite to each other to form a first opening and a second opening. The first adjusting body (40) and the second adjusting body (50) can be disposed in the guide channel (110) and guide and cooperate with the guide sleeve (100). The rotating member (91) rotates to drive the first rod (92) and the second rod (93) to swing, thereby driving the first adjusting body (40) and the second adjusting body (50) to move closer to each other through the first arc-shaped adjusting hole (46) and the second arc-shaped adjusting hole (52).

9. The interbody fusion prosthesis assembly according to claim 8, characterized in that, After the axis of the first rod (92) and the axis of the second rod (93) rotate one revolution, they together form a base circle. The base circle includes a first arc length and a second arc length that is opposite to the first arc length. The center line of the first arc-shaped adjustment hole (46) is the involute of the first arc length, and the center line of the second arc-shaped adjustment hole (52) is the involute of the second arc length.

10. The interbody fusion prosthesis assembly according to claim 8, characterized in that, The regulator (90) further includes a first screw (94), and the rotating component (91) includes a rotating cylinder (911) movably sleeved on the first screw (94) and a connecting block (912) connected to the rotating cylinder (911). The first rod body (92) and the second rod body (93) are spaced apart on the connecting block (912). The inner wall of the rotating cylinder (911) is provided with a first internal thread, which is threadedly engaged with the first screw (94).

11. The interbody fusion prosthesis assembly according to claim 10, characterized in that, The first adjusting body (40) is provided with a first opening groove (47), and the second adjusting body (50) is provided with a second opening groove (53). The first adjusting body (40) and the second adjusting body (50) are close to each other so that the first opening groove (47) and the second opening groove (53) form a clamping hole. The wall of the clamping hole is provided with a second internal thread. The regulator (90) further includes a second screw (95) movably disposed within the first screw (94). The first screw (94) is provided with an internally threaded hole extending along its axial direction. The second screw (95) is threadedly engaged with the internally threaded hole. The first end of the second screw (95) extends beyond the first end of the first screw (94), and the first end of the second screw (95) is located between the first rod body (92) and the second rod body (93). The second end of the second screw (95) extends beyond the second end of the first screw (94).

12. The interbody fusion prosthesis assembly according to claim 8, characterized in that, The guide sleeve (100) is provided with a plug rod (120), and the outer housing (10) is provided with a socket (15). The plug rod (120) is inserted into the socket (15) so that the first opening aligns with the mounting opening (12).

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