Long segment bone prosthesis

Abstract

This invention provides a long-segment bone prosthesis, comprising: a first support stem; a second support stem fitted to the first support stem; a first connector connecting the first and second support stems; a fixing plate extending along the length of the first support stem, a first end of the fixing plate located on the side of the first support stem away from the second support stem, a second end of the fixing plate having a receiving gap with the first support stem, and a mounting through hole provided on the fixing plate; a first fixing rod detachably inserted into the mounting through hole and spaced apart from the second support stem, the end of the first fixing rod near the first support stem contacting and engaging with the first support stem; and a second fixing rod located on the side of the second support stem away from the first support stem and extending in a direction away from the second support stem. The technical solution of this application effectively solves the problem of easy fracture in long-segment bone prostheses in related technologies.

Description

Technical Field

[0001] This invention relates to the field of prosthesis technology, and more specifically, to a long-segment bone prosthesis. Background Technology

[0002] During total hip replacement surgery, a long bone prosthesis can be used to connect the two ends of the femur.

[0003] In related technologies, long bone prostheses have through holes. Bolts pass through the bone structure and then through these through holes, connecting the long bone prosthesis to the bone structure. Because of these through holes, stress exists between the bone structure and the bolts during use. This stress, transmitted by the bolts, causes bending and torsion in the long bone prosthesis, making it prone to cracking at the edges of the through holes. Consequently, long bone prostheses are susceptible to fracture after prolonged use. Summary of the Invention

[0004] The main objective of this invention is to provide a long bone prosthesis to solve the problem that long bone prostheses in related technologies are prone to fracture.

[0005] To achieve the above objectives, according to one aspect of the present invention, a long-segment bone prosthesis is provided, comprising: a first support stem; a second support stem disposed in contact with the first support stem; a first connector connecting the first support stem and the second support stem; a fixing plate extending along the length direction of the first support stem, a first end of the fixing plate being disposed on the side of the first support stem away from the second support stem, a second end of the fixing plate having a receiving gap with the first support stem, and a mounting through hole being provided on the fixing plate; a first fixing rod detachably inserted into the mounting through hole and spaced apart from the second support stem, the end of the first fixing rod near the first support stem contacting and engaging with the first support stem; and a second fixing rod disposed on the side of the second support stem away from the first support stem and extending in a direction away from the second support stem.

[0006] Furthermore, the first support handle includes a first handle body and a second handle body connected to the first handle body, and the second support handle includes a third handle body and a fourth handle body connected to the third handle body. The first handle body and the third handle body cooperate to form a first column structure, and the second handle body and the fourth handle body cooperate to form a second column structure. The diameter of the first column structure is smaller than the diameter of the second column structure.

[0007] Furthermore, the first end of the fixing plate is disposed on the second handle body, the fixing plate extends along the direction from the second handle body to the first handle body, and a receiving gap is formed between the second end of the fixing plate and the first handle body, and the end of the first fixing rod near the first support handle contacts and engages with the first handle body.

[0008] Furthermore, the second fixing rod is mounted on the third handle, and the axis of the third handle coincides with the axis of the first handle.

[0009] Furthermore, the long bone prosthesis also includes a positioning pin. A first positioning groove is provided on the side of the second stem facing the fourth stem, and a second positioning groove is provided on the side of the fourth stem facing the second stem. The first positioning groove and the second positioning groove form a positioning hole, and the positioning pin passes through the positioning hole.

[0010] Furthermore, the first connecting member is a first bolt, which passes through the first support handle and the second support handle, and the axis of the locating pin and the axis of the first connecting member are set at an angle.

[0011] Furthermore, the second support handle also includes a stop plate, which is disposed at the end of the third handle body away from the fourth handle body. In the radial direction of the third handle body, the stop plate protrudes from the third handle body towards the first handle body, and the end of the first handle body away from the second handle body is engaged with the stop plate.

[0012] Furthermore, the first support handle also includes a boss, which is located at the end of the first handle body away from the second handle body, and the outer surface of the boss and the outer surface of the stop form an arc-shaped surface.

[0013] Furthermore, the long bone prosthesis also includes a guide structure disposed between the first support stem and the second support stem. The guide structure includes a guide groove and a guide rail, both of which extend along the length direction of the first support stem. One of the guide rail and the guide groove is disposed on the side of the first support stem facing the second support stem, and the other of the guide rail and the guide groove is disposed on the side of the second support stem facing the first support stem. The width of the opening of the guide groove is smaller than the width of the bottom of the guide groove. And / or, the end of the first fixing rod near the first support stem abuts against or is screwed to the first support stem.

[0014] Furthermore, the long bone prosthesis also includes a mounting post, which is disposed on the first support stem and / or the second support stem. The long bone prosthesis also includes a third support stem, the end of which is provided with a receiving hole. The mounting post passes through the receiving hole and is interference-fitted with the receiving hole.

[0015] According to the technical solution of this invention, a long-segment bone prosthesis includes a first support stem, a second support stem, a first connector, a fixation plate, a first fixation rod, and a second fixation rod. A portion of the first support stem is inserted into the first medullary cavity of the first bone structure, and a portion of the second support stem is also inserted into the first medullary cavity of the first bone structure. The first connector connects the first and second support stems, making their relative positions more stable. The first fixation rod passes through a mounting hole, allowing it to move and engage with the first support stem. Since the first bone structure is located within a receiving interval, during the movement of the first fixation rod to engage with the first support stem, the first fixation rod passes through the side of the first bone structure, allowing the fixation plate to be fixed to the first bone structure via the first fixation rod. Furthermore, the first and second support stems are fixed to the first bone structure via the fixation plate, thus achieving fixation of the long-segment bone prosthesis to the first bone structure. The first fixing rod, with its end near the first support handle, contacts and engages with the first support handle, and the first fixing rod is spaced apart from the second support handle. This avoids the need for a first perforation in the first support handle for the first fixing rod to pass through, and a second perforation in the second support handle for the second fixing rod to pass through. This prevents stress on the first bone structure from being transmitted to the first fixing rod during use, and subsequently to the first and second support handles, potentially causing cracks at the edges of the first and second perforations, leading to fracture of the long bone prosthesis. In other words, avoiding the first and second perforations reduces the probability of long bone prosthesis failure. The second fixing rod can be inserted into the inner wall of the first medullary cavity of the first bone structure, allowing the second support handle to be fixed to the first bone structure. Therefore, the technical solution of this application effectively solves the problem of easy fracture in long bone prostheses in related technologies. Attached Figure Description

[0016] 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:

[0017] Figure 1 A three-dimensional structural schematic diagram of an embodiment of a long bone prosthesis according to the present invention is shown;

[0018] Figure 2 It shows Figure 1 A cross-sectional schematic diagram of a long bone prosthesis;

[0019] Figure 3 It shows Figure 1 A three-dimensional structural diagram of the first support stem of a long-segment bone prosthesis;

[0020] Figure 4 It shows Figure 1 A three-dimensional structural diagram of the second support stem of a long bone prosthesis.

[0021] The above figures include the following reference numerals:

[0022] 10. First support handle; 11. First handle body; 12. Second handle body; 121. First positioning groove; 13. Boss; 20. Second support handle; 21. Third handle body; 22. Fourth handle body; 221. Second positioning groove; 23. Stop; 30. First connecting piece; 31. First bolt; 311. First threaded section; 312. First operating section; 40. Fixing plate; 41. Mounting through hole; 50. Accommodating interval; 60. First fixing rod; 70. Second fixing rod; 80. Positioning pin; 90. Arc-shaped surface; 100. Guide structure; 101. Guide groove; 102. Guide rail; 110. Mounting post; 120. Third support handle; 1201. Accommodating hole; 130. Second connecting piece; 131. Second bolt; 1311. Second threaded section; 1312. Second operating section. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] 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.

[0026] like Figure 1 and Figure 2 As shown, the long bone prosthesis of this embodiment includes: a first support stem 10, a second support stem 20, a first connector 30, a fixation plate 40, a first fixation rod 60, and a second fixation rod 70. The second support stem 20 is fitted to the first support stem 10. The first connector 30 connects the first support stem 10 and the second support stem 20. The fixation plate 40 extends along the length of the first support stem 10, with its first end located on the side of the first support stem 10 away from the second support stem 20, and its second end having a receiving gap 50 with the first support stem 10. The fixation plate 40 has a mounting through hole 41. The first fixation rod 60 is detachably inserted into the mounting through hole 41 and spaced apart from the second support stem 20, with the end of the first fixation rod 60 near the first support stem 10 contacting and engaging with it. The second fixation rod 70 is located on the side of the second support stem 20 away from the first support stem 10 and extends in a direction away from the second support stem 20.

[0027] Using the technical solution of this embodiment, the long bone prosthesis includes a first support stem 10, a second support stem 20, a first connector 30, a fixation plate 40, a first fixation rod 60, and a second fixation rod 70. A portion of the first support stem 10 is inserted into the first medullary cavity of the first bone structure, and a portion of the second support stem 20 is also inserted into the first medullary cavity of the first bone structure. The first connector 30 connects the first support stem 10 and the second support stem 20, making the relative position between the first support stem 10 and the second support stem 20 more stable. The first fixation rod 60 can pass through the mounting through hole 41, allowing it to move to contact and engage with the first support stem 10. The first bone structure is located within the receiving interval 50. During the movement of the first fixation rod 60 to contact and engage with the first support stem 10, the first fixation rod 60 can pass through the side of the first bone structure, allowing the fixation plate 40 to be fixed to the first bone structure via the first fixation rod 60. Consequently, the first support stem 10 and the second support stem 20 can be fixed to the first bone structure via the fixation plate 40, thus achieving fixation of the long bone prosthesis to the first bone structure. The first fixing rod 60, with its end near the first support handle 10, contacts and engages with the first support handle 10. The first fixing rod 60 and the second support handle 20 are spaced apart. This avoids the need for a first perforation in the first support handle 10 for the first fixing rod 60 to pass through, and avoids the need for a second perforation in the second support handle 20 for the second fixing rod 70 to pass through. This prevents stress on the first bone structure from being transmitted to the first fixing rod 60 during use, and subsequently to the first support handle 10 and the second support handle 20, potentially causing cracks at the edges of the first and second perforations and leading to fracture of the long bone prosthesis. In other words, avoiding the first and second perforations reduces the probability of failure of the long bone prosthesis. The second fixing rod 70 can be inserted into the inner wall of the first medullary cavity of the first bone structure, allowing the second support handle 20 to be fixed to the first bone structure. Therefore, the technical solution of this embodiment effectively solves the problem of long bone prostheses being prone to fracture in related technologies.

[0028] It should be noted that the outer periphery of the second fixation rod 70 has a 0.5mm thick porous structure, which can promote bone ingrowth. The fixation plate 40 is located outside the first bone structure.

[0029] like Figures 1 to 4As shown, in this embodiment, the first support handle 10 includes a first handle body 11 and a second handle body 12 connected to the first handle body 11. The second support handle 20 includes a third handle body 21 and a fourth handle body 22 connected to the third handle body 21. The first handle body 11 and the third handle body 21 cooperate to form a first column structure, and the second handle body 12 and the fourth handle body 22 cooperate to form a second column structure. The diameter of the first column structure is smaller than the diameter of the second column structure. This facilitates the insertion of the first column structure into the first medullary cavity of the first bone structure, reducing the amount of the first bone structure removed. Furthermore, the connection between the second and first bone structures by the second column structure also improves the structural strength of the long bone prosthesis at the second column structure.

[0030] like Figures 1 to 3 As shown, in this embodiment, the first end of the fixing plate 40 is disposed on the second handle 12, and the fixing plate 40 extends along the direction from the second handle 12 to the first handle 11. A receiving gap 50 is formed between the second end of the fixing plate 40 and the first handle 11. The end of the first fixing rod 60 near the first support handle 10 contacts and engages with the first handle 11. Since the diameter of the first column structure is smaller than the diameter of the second column structure, the first through hole is not provided on the first handle 11 and the second through hole is not provided on the second handle 12, which can reduce the probability of breakage of the first handle 11 and the second handle 12.

[0031] like Figure 1 , Figure 2 as well as Figure 4 As shown, in this embodiment, the second fixing rod 70 is disposed on the third handle 21, and the axis of the third handle 21 coincides with the axis of the first handle 11. This arrangement, compared to a misaligned arrangement of the axes of the first handle 11 and the third handle 21, results in a more reasonable stress distribution on the first handle 11 and the second handle 12, thereby enabling the long-segment bone prosthesis to have a longer service life.

[0032] like Figure 1 and Figure 2 As shown, in this embodiment, the long bone prosthesis also includes a positioning pin 80. A first positioning groove 121 is provided on the side of the second stem 12 facing the fourth stem 22, and a second positioning groove 221 is provided on the side of the fourth stem 22 facing the second stem 12. The first positioning groove 121 and the second positioning groove 221 form a positioning hole, and the positioning pin 80 passes through the positioning hole. The positioning pin 80 makes the relative position between the second stem 12 and the fourth stem 22 more stable, thereby making the relative position between the first stem 11 and the third stem 21 more stable, and thus making the relative position between the first support stem 10 and the second support stem 20 more stable. The positioning pin 80 can also withstand the shear force between the second stem 12 and the first stem 11, resulting in better overall rigidity of the long bone prosthesis at the positioning pin 80, and thus better stability of the long bone prosthesis.

[0033] like Figure 1 and Figure 2 As shown, in this embodiment, the first connector 30 is a first bolt 31, which passes through the first support handle 10 and the second support handle 20, connecting the first support handle 10 and the second support handle 20. The axis of the positioning pin 80 and the axis of the first connector 30 are set at an angle, so that the positioning pin 80 and the first connector 30 can withstand the shear force between the first support handle 10 and the second support handle 20 at different positions in the circumferential direction of the first support handle 10, reducing the stress on the first connector 30 and making the stress on the long bone prosthesis at the positioning pin 80 and the first connector 30 more reasonable.

[0034] It should be noted that the first bolt 31 passes through the second handle 12 and the fourth handle 22.

[0035] like Figure 1 , Figure 2 as well as Figure 4 As shown, in this embodiment, the second support handle 20 further includes a stop 23. The stop 23 is disposed at the end of the third handle 21 away from the fourth handle 22. In the radial direction of the third handle 21, the stop 23 protrudes from the first handle 11, and the end of the first handle 11 away from the second handle 12 engages with the stop 23. The stop 23 can stop the third handle 21, making the relative position between the first handle 11 and the third handle 21 more stable. The stop 23 can also bear the shear force between the first handle 11 and the third handle 21, thereby sharing the shear force on the first connecting member 30.

[0036] like Figure 1 and Figure 2 As shown, in this embodiment, the first support handle 10 further includes a boss 13, which is disposed at the end of the first handle body 11 away from the second handle body 12. The outer surface of the boss 13 and the outer surface of the stop 23 form an arc-shaped surface 90. This ensures that when the first column structure is inserted into the first medullary cavity, the arc-shaped surface 90 will not damage the first medullary cavity.

[0037] like Figure 3 and Figure 4As shown, in this embodiment, the long bone prosthesis also includes a guide structure 100 disposed between the first support handle 10 and the second support handle 20. The guide structure 100 includes a guide groove 101 and a guide rail 102, both extending along the length of the first support handle 10. The guide groove 101 is disposed on the side of the first support handle 10 facing the second support handle 20, and the guide rail 102 is disposed on the side of the second support handle 20 facing the first support handle 10. The guide rail 102 and guide groove 101 facilitate the connection between the first support handle 10 and the second support handle 20 and prevent relative rotation between the first support handle 10 and the second support handle 20 in the circumferential direction of the first support handle 10. The width of the opening of the guide groove 101 is smaller than the width of the bottom of the guide groove 101, thus making the relative position between the first support handle 10 and the second support handle 20 more stable in the direction from the first support handle 10 to the second support handle 20 under the action of the guide rail 102 and the guide groove 101.

[0038] It should be noted that the guide groove 101 is a dovetail groove.

[0039] In other embodiments, the guide rail 102 is disposed on the side of the first support handle 10 facing the second support handle 20, and the guide groove 101 is disposed on the side of the second support handle 20 facing the first support handle 10.

[0040] like Figure 1 and Figure 2 As shown, in this embodiment, the end of the first fixing rod 60 near the first support handle 10 abuts against the first support handle 10. The first fixing rod 60 can apply a force toward the second support handle 20 to the fixing plate 40, making the fixing plate 40 fit more closely to the first bone structure. At this time, the inner wall of the mounting through hole 41 is provided with threads. The first support handle 10 is provided with a blind hole, and the end of the first fixing rod 60 near the first support handle 10 is located in the blind hole.

[0041] In other embodiments, the end of the first fixing rod 60 near the first support handle 10 is screwed to the first support handle 10. A threaded hole is provided on the first support handle 10.

[0042] like Figure 1 and Figure 2As shown, in this embodiment, the long bone prosthesis further includes a mounting post 110, which is disposed on the first support handle 10 and the second support handle 20. The long bone prosthesis also includes a third support handle 120, the end of which is provided with a receiving hole 1201. The mounting post 110 passes through the receiving hole 1201, and the third support handle 120 is disposed in the second medullary cavity of the second bone structure. This allows the first bone structure and the second bone structure to be connected under the action of the first support handle 10, the second support handle 20, and the third support handle 120. The mounting post 110 is press-fitted with the receiving hole 1201, thereby connecting the first support handle 10, the second support handle 20, and the third support handle 120.

[0043] It should be noted that the mounting post 110 includes a first mounting body and a second mounting body. The first mounting body is disposed on the first support handle 10, and the second mounting body is disposed on the second support handle 20.

[0044] The third support handle 120 includes a first column segment and a second column segment connected to the first column segment. The diameter of the first column segment is smaller than that of the second column segment. A receiving hole 1201 is provided on the second column segment. The first column segment is inserted into the second medullary cavity of the second bone structure.

[0045] Mounting post 110 is located at one end of the second column structure facing the second bone structure. The second column structure is located between the second column segment and the first bone structure. The second column segment is located between the second main structure and the second bone structure.

[0046] like Figure 1 and Figure 2In this embodiment, the long bone prosthesis also includes a second connector 130 that connects the first support stem 10 and the second support stem 20. The second connector 130 and the first connector 30 are spaced apart in the length direction of the first support stem 10. The second connector 130 includes a second bolt 131 that passes through the first support stem 10 and the second support stem 20. The second bolt 131 can connect the first support stem 10 and the second support stem 20, making the relative position between the first support stem 10 and the second support stem 20 more stable. The first bolt 31 includes a first threaded section 311 and a first operating section 312 connected to the first threaded section 311. The second bolt 131 includes a second threaded section 1311 and a second operating section 1312 connected to the second threaded section 1311. The direction from the first threaded section 311 to the first operating section 312 is opposite to the direction from the second threaded section 1311 to the second operating section 1312. This makes the loosening directions of the first bolt 31 and the second bolt 131 opposite, reducing the probability of the first bolt 31 and the second bolt 131 loosening. It also avoids the situation where the first threaded section 311 and the second threaded section 1311 are both located on the first support shank 10 or the second support shank 20, resulting in the first support shank 10 or the second support shank 20 being subjected to greater force, which could easily cause cracks in the first support shank 10 or the second support shank 20.

[0047] It should be noted that the first support handle 10 is provided with a first threaded hole and a first clearance hole, and the second support handle 20 is provided with a second threaded hole and a second clearance hole. The first threaded hole and the second clearance hole are correspondingly provided, and the second threaded hole and the first clearance hole are correspondingly provided. The first threaded section 311 is threadedly engaged with the first threaded hole. The first operating section 312 is located within the first clearance hole. The second threaded section 1311 is threadedly engaged with the second threaded hole. The second operating section 1312 is located within the second clearance hole.

[0048] The first threaded hole and the first clearance hole are provided on the second handle 12, and the second threaded hole and the second clearance hole are provided on the fourth handle 22.

[0049] Specifically, the first connector 30, the second connector 130, and the positioning pin 80 can enhance the overall rigidity and stability of the connection between the first support handle 10 and the second support handle 20.

[0050] It should be noted that the first and second bone structures can be either the femur or the tibia.

[0051] The first bone structure is provided with a third clearance hole that communicates with the first medullary cavity, and the second fixing rod 70 is located in the third clearance hole.

[0052] The first medullary cavity is the proximal medullary cavity, and the second medullary cavity is the distal medullary cavity.

[0053] In this embodiment, during the installation of the long bone prosthesis, the second support handle 20 is first inserted into the first medullary cavity, and the second fixing rod 70 is aligned with the third clearance hole. Then, the second fixing rod 70 is moved into the third clearance hole, and the first support is installed onto the second support handle 20 via the guide structure 100. At this point, a portion of the first bone structure is located between the fixing plate 40 and the first support handle 10. The first fixing rod 60 is then passed through the mounting through hole 41, so that one end of the first fixing rod 60 near the first support handle 10 passes through the first bone structure and engages with the first support handle 10. The third support handle 120 is then connected to the first support handle 10 and the second support handle 20 via the mounting post 110. Finally, the first post segment of the third support handle 120 is inserted into the second medullary cavity of the second bone structure, thus connecting the first and second bone structures.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. In particular, unless there is a clear contradiction or logical conflict in the context, any technical feature in any embodiment disclosed in this specification can be arbitrarily combined with other technical features in any one or more other embodiments to form a new technical solution. All possible variations formed by combining different features, which can be conceived by those skilled in the art based on the technical teachings provided by the present invention, should be considered as fully disclosed in this specification, and these combinations also fall within the scope of protection claimed by the present invention.

Claims

1. A long-segment bone prosthesis, characterized in that, include: First support handle (10); The second support handle (20) is fitted to the first support handle (10); The first connector (30) connects the first support handle (10) and the second support handle (20). A fixing plate (40) extends along the length direction of the first support handle (10). The first end of the fixing plate (40) is located on the side of the first support handle (10) away from the second support handle (20). The second end of the fixing plate (40) has a receiving gap (50) with the first support handle (10). The fixing plate (40) is provided with a mounting through hole (41). The first fixing rod (60) is detachably inserted into the mounting through hole (41) and spaced apart from the second support handle (20). The end of the first fixing rod (60) near the first support handle (10) contacts and engages with the first support handle (10). The second fixing rod (70) is disposed on the side of the second support handle (20) away from the first support handle (10) and extends in a direction away from the second support handle (20); The first support handle (10) includes a first handle body (11) and a second handle body (12) connected to the first handle body (11). The second support handle (20) includes a third handle body (21) and a fourth handle body (22) connected to the third handle body (21). The first handle body (11) and the third handle body (21) cooperate to form a first column structure. The second handle body (12) and the fourth handle body (22) cooperate to form a second column structure. The diameter of the first column structure is smaller than the diameter of the second column structure.

2. The long-segment bone prosthesis according to claim 1, characterized in that, The first end of the fixing plate (40) is disposed on the second handle (12). The fixing plate (40) extends along the direction from the second handle (12) to the first handle (11). The second end of the fixing plate (40) and the first handle (11) form the receiving interval (50). The end of the first fixing rod (60) near the first support handle (10) contacts and engages with the first handle (11).

3. The long-segment bone prosthesis according to claim 1, characterized in that, The second fixing rod (70) is disposed on the third handle (21), and the axis of the third handle (21) is arranged to coincide with the axis of the first handle (11).

4. The long-segment bone prosthesis according to claim 1, characterized in that, The long bone prosthesis also includes a positioning pin (80), the second stem (12) is provided with a first positioning groove (121) on the side facing the fourth stem (22), the fourth stem (22) is provided with a second positioning groove (221) on the side facing the second stem (12), the first positioning groove (121) and the second positioning groove (221) form a positioning hole, and the positioning pin (80) passes through the positioning hole.

5. The long-segment bone prosthesis according to claim 4, characterized in that, The first connector (30) is a first bolt (31), which passes through the first support handle (10) and the second support handle (20). The axis of the positioning pin (80) and the axis of the first connector (30) are set at an angle.

6. The long-segment bone prosthesis according to claim 3, characterized in that, The second support handle (20) also includes a stop (23), which is disposed at one end of the third handle (21) away from the fourth handle (22). In the radial direction of the third handle (21), the stop (23) protrudes from the third handle (21) toward the first handle (11), and the end of the first handle (11) away from the second handle (12) is engaged with the stop (23).

7. The long-segment bone prosthesis according to claim 6, characterized in that, The first support handle (10) also includes a boss (13), which is located at one end of the first handle body (11) away from the second handle body (12). The outer surface of the boss (13) and the outer surface of the stop (23) form an arc surface (90).

8. The long-segment bone prosthesis according to any one of claims 1 to 7, characterized in that, The long bone prosthesis also includes a guide structure (100) disposed between the first support handle (10) and the second support handle (20). The guide structure (100) includes a guide groove (101) and a guide rail (102). Both the guide groove (101) and the guide rail (102) extend along the length direction of the first support handle (10). One of the guide rail (102) and the guide groove (101) is disposed on the side of the first support handle (10) facing the second support handle (20), and the other of the guide rail (102) and the guide groove (101) is disposed on the side of the second support handle (20) facing the first support handle (10). The width of the opening of the guide groove (101) is smaller than the width of the bottom of the guide groove (101). And / or, the first fixing rod (60) abuts against the first support handle (10) at one end near the first support handle (10).

9. The long-segment bone prosthesis according to any one of claims 1 to 7, characterized in that, The long bone prosthesis also includes a mounting post (110), which is disposed on the first support shank (10) and / or the second support shank (20). The long bone prosthesis also includes a third support shank (120), the end of which is provided with a receiving hole (1201). The mounting post (110) passes through the receiving hole (1201) and is interference-fitted with the receiving hole (1201).

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