Bone filling prosthesis

Abstract

The present invention provides a bone filling prosthesis, comprising: a main body portion for filling human bone mass; a positioning member movably disposed on the main body portion, the positioning member having an initial position and a positioning position; when the positioning member is in the initial position, at least a part of the positioning member is disposed within the main body portion so that the positioning member avoids the bone mass; when the positioning member is in the positioning position, at least a part of the positioning member protrudes from the outer surface of the main body portion so that the positioning member is connected to the bone mass. By the technical solution provided by the present invention, the technical problem of poor filling stability of the bone filling prosthesis in the prior art can be solved.

Description

Technical Field

[0001] The present invention relates to the field of medical technologies, and in particular, to a bone filling prosthesis. Background Art

[0002] Currently, bone defects are problems frequently encountered by orthopedic surgeons. Bone defect filling prostheses in the prior art are generally granular, columnar, and irregular in shape. After being implanted, bone filling prostheses generally need to have good stability to achieve long-term filling effects.

[0003] However, bone filling prostheses in the prior art generally do not have structures for connecting with human bone mass. In this way, it is not conducive to the fixation of bone filling prostheses to human bone mass and not conducive to achieving long-term filling effects. Summary of the Invention

[0004] The main purpose of the present invention is to provide a bone filling prosthesis to solve the technical problem of poor filling stability of bone filling prostheses in the prior art.

[0005] To achieve the above purpose, the present invention provides a bone filling prosthesis, including: a main body part for filling human bone mass; a positioning member movably arranged on the main body part, the positioning member having an initial position and a positioning position; when the positioning member is in the initial position, at least part of the positioning member is arranged inside the main body part so that the positioning member avoids the bone mass; when the positioning member is in the positioning position, at least part of the positioning member protrudes from the outer surface of the main body part so that the positioning member connects with the bone mass.

[0006] Further, a first positioning hole is arranged on the main body part, and at least part of the positioning member is movably arranged in the first positioning hole; when the positioning member is in the initial position, the positioning member is hidden in the first positioning hole; when the positioning member is in the positioning position, at least part of the positioning member extends out of the first positioning hole.

[0007] Further, the positioning member is rotatably arranged on the main body part so that the positioning member rotates to the initial position or the positioning position.

[0008] Further, the positioning member includes a positioning part. When the positioning member is in the initial position, the positioning part is located in the first positioning hole; when the positioning member is in the positioning position, the positioning part protrudes from the outer surface of the main body part; the positioning part is a spike structure for piercing into the bone mass.

[0009] Furthermore, a second positioning hole is provided on the main body, and the second positioning hole extends along the extension direction of the main body, and the second positioning hole is connected to the first positioning hole; when the positioning member is in the initial position, at least part of the positioning member is located in the second positioning hole; the bone filling prosthesis also includes: a driving member, which is used to be arranged in the second positioning hole, so that when the driving member enters the second positioning hole, the driving member pushes the positioning member from the initial position to the positioning position.

[0010] Furthermore, the positioning member includes a connecting portion and a protruding portion, the connecting portion is movably arranged on the main body, and the protruding portion is arranged on the connecting portion; the protruding portion includes a positioning portion and a contact portion, and the positioning portion and the contact portion are connected; so that when the driving member enters the second positioning hole, the driving member contacts the contact portion to push the positioning portion to move to a position protruding from the main body.

[0011] Furthermore, the second positioning hole is an internal threaded hole, and the driving member is provided with an external threaded section adapted to the internal threaded hole, so that the driving member and the internal threaded hole are matched through a threaded connection.

[0012] Furthermore, a mounting hole is provided on the driving member, and the mounting hole is located at the end of the driving member, so that after the operating member is inserted into the mounting hole, the driving member is driven to move in the internal threaded hole.

[0013] Further, the driving member includes a tapered section, and the second positioning hole includes a tapered hole section, so that the connection is achieved through the cooperation between the tapered hole section and the tapered section.

[0014] Furthermore, the second positioning hole includes a first hole segment and a second hole segment, the first hole segment and the second hole segment are connected, the first hole segment is a first cylindrical hole segment, and the second hole segment is a conical hole segment, and the cross-sectional area of ​​the first cylindrical hole segment is larger than the cross-sectional area of ​​the conical hole segment, so as to form a first positioning step at the connection between the first cylindrical hole segment and the conical hole segment, so as to abut and position the driving member through the first positioning step.

[0015] Furthermore, the driving member includes a first connecting section and a second connecting section, the first connecting section is connected to the second connecting section, the first connecting section is a first cylindrical section adapted to the first hole section, and the second connecting section is a conical section adapted to the second hole section.

[0016] Furthermore, the driving member includes a first connecting section and a second connecting section, the first connecting section and the second connecting section are connected, and the second connecting section is a conical section adapted to the second hole section; the outer wall surface of the first connecting section includes an arc surface and a plane surface, the arc surface is connected to the plane surface, the arc surface is adapted to the inner wall surface of the first hole section, and an avoidance interval is formed between the plane surface and the inner wall surface of the first hole section so as to avoid the positioning member through the avoidance interval.

[0017] Further, the driving member further includes a third connecting section, which is a second cylindrical section. The third connecting section is located at one end of the first connecting section away from the second connecting section. The diameter of the third connecting section is larger than that of the first connecting section, so as to form a second positioning step at the connection between the third connecting section and the first connecting section, so that the second positioning step abuts and positions against the end of the main body part.

[0018] Further, a striking hole is also provided on the driving member, so that the positioning member can be installed in the second positioning hole by knocking on the striking hole through an operating member.

[0019] Further, there are multiple positioning members, and the multiple positioning members are arranged at intervals along a ring on the main body part.

[0020] Applying the technical solution of the present invention and using the bone filling prosthesis provided by the present invention, during the process of filling the bone filling prosthesis into the bone mass, first make the positioning member in the initial position to facilitate the entry of the main body part into the human bone mass; when the main body part is filled into the human bone mass, make the positioning member move from the initial position to the positioning position, and at least part of the positioning member protrudes from the outer surface of the main body part, so as to be inserted into the human bone mass through the protruding positioning member for positioning, thereby facilitating the connection between the main body part and the human bone mass, so that the two can be stably combined together, and further improving the stability of the bone filling prosthesis implanted into the human bone mass. Therefore, through the technical solution provided by the present invention, the technical problem of poor filling stability of the bone filling prosthesis in the prior art can be solved. Description of the Drawings

[0021] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0022] Figure 1 Shows a schematic structural view of a bone filling prosthesis provided by an embodiment of the present invention;

[0023] Figure 2 Shows a cross-sectional view of a bone filling prosthesis provided by an embodiment of the present invention;

[0024] Figure 3 Shows a schematic structural view of a driving member provided by Embodiment 1 of the present invention;

[0025] Figure 4 Shows a front view of a driving member provided by Embodiment 1 of the present invention;

[0026] Figure 5 Shows a cross-sectional view of a main body part provided by Embodiment 1 of the present invention;

[0027] Figure 6Shows a cross-sectional view of a bone filling prosthesis provided according to Embodiment 1 of the present invention;

[0028] Figure 7 Shows a schematic structural diagram of a driving member provided according to Embodiment 2 of the present invention;

[0029] Figure 8 Shows a front view of a driving member provided according to Embodiment 2 of the present invention;

[0030] Figure 9 Shows a cross-sectional view of a main body portion provided according to Embodiment 2 of the present invention;

[0031] Figure 10 Shows a cross-sectional view of a bone filling prosthesis provided according to Embodiment 2 of the present invention;

[0032] Figure 11 Shows a schematic structural diagram of a driving member provided according to Embodiment 3 of the present invention;

[0033] Figure 12 Shows a front view of a driving member provided according to Embodiment 3 of the present invention; and

[0034] Figure 13 Shows a cross-sectional view of a bone filling prosthesis provided according to Embodiment 3 of the present invention.

[0035] Wherein, the above-mentioned drawings include the following reference numerals:

[0036] 10, main body portion; 11, first positioning hole; 12, second positioning hole; 121, first hole section; 122, second hole section; 20, positioning member; 21, positioning portion; 22, connecting portion; 23, contact portion; 30, driving member; 31, mounting hole; 32, first connecting section; 33, second connecting section; 34, third connecting section; 35, punching hole. Detailed implementation manners

[0037] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0038] Such as Figure 1 And Figure 2As shown in the figure, an embodiment of the present invention provides a bone filling prosthesis, which includes a main body portion 10 and a positioning member 20. The main body portion 10 is used for filling human bone mass. The positioning member 20 is movably arranged on the main body portion 10, and the positioning member 20 has an initial position and a positioning position. When the positioning member 20 is in the initial position, at least a part of the positioning member 20 is arranged inside the main body portion 10 so that the positioning member 20 avoids the bone mass. When the positioning member 20 is in the positioning position, at least a part of the positioning member 20 protrudes from the outer surface of the main body portion 10 so that the positioning member 20 is connected to the bone mass.

[0039] Using the bone filling prosthesis provided in this embodiment, the outer surface of the main body portion 10 is a smooth outer surface. The outer surface of the main body portion 10 includes a cylindrical surface and an arc-shaped end face. The arc-shaped end face is located at the end of the cylindrical surface. Specifically, the arc-shaped end face can be a spherical surface. With such a setting, it is convenient for the main body portion 10 to enter the human bone mass. After the main body portion 10 is filled into the human bone mass, the positioning member 20 is moved from the initial position to the positioning position. At this time, at least a part of the positioning member 20 protrudes from the outer surface of the main body portion 10 to penetrate into the human bone mass through the protruding positioning member 20 for positioning, so as to facilitate connecting the main body portion 10 with the human bone mass, so that the two can be stably combined together, and further improve the stability of the bone filling prosthesis implanted in the human bone mass. Therefore, through the bone filling prosthesis provided by the present invention, the technical problem of poor filling stability of the bone filling prosthesis in the prior art can be solved.

[0040] In this embodiment, a first positioning hole 11 is provided on the main body portion 10, and at least a part of the positioning member 20 is movably arranged in the first positioning hole 11. When the positioning member 20 is in the initial position, the positioning member 20 is hidden in the first positioning hole 11. When the positioning member 20 is in the positioning position, at least a part of the positioning member 20 extends out of the first positioning hole 11. With such a setting, during the process of the main body portion 10 entering the human bone mass, it is convenient for the positioning member 20 to be in the initial position to avoid the bone mass, reduce the filling resistance of the main body portion 10, and improve the filling smoothness of the main body portion 10. After the main body portion 10 is filled into the bone mass, it is convenient for the positioning member 20 to move to the positioning position to position with the bone mass through the protruding positioning member 20, so as to facilitate improving the filling stability.

[0041] Specifically, the positioning member 20 in this embodiment is rotatably arranged on the main body portion 10 so that the positioning member 20 rotates to the initial position or the positioning position. In this embodiment, the positioning member 20 is rotatably arranged in the first positioning hole 11 to facilitate the positioning member 20 to smoothly move to the initial position or the positioning position, so as to improve the filling stability. Specifically, the positioning member 20 in this embodiment can be a fixed fin. Specifically, the fixed fin in this embodiment can rotate along the rotation axis, and the rotation axis is fixed on the main body portion 10 by riveting.

[0042] In this embodiment, the positioning member 20 includes a positioning portion 21. When the positioning member 20 is in the initial position, the positioning portion 21 is located within the first positioning hole 11 so as to avoid the bone mass, facilitating the smooth filling of the main body portion 10 into the bone mass. When the positioning member 20 is in the positioning position, the positioning portion 21 protrudes from the outer surface of the main body portion 10, facilitating the insertion of the positioning portion 21 into the bone mass for positioning. Specifically, the positioning portion 21 in this embodiment is a spike structure for piercing into the bone mass. Using the spike structure for positioning can improve the positioning stability and prevent the main body portion 10 from moving within the bone mass. Specifically, the spike structure can be a protruding triangular prism structure; or the spike structure is formed by an arc surface and a flat surface, with a spike portion formed at the connection of the arc surface and the flat surface, facilitating the insertion of the spike structure into the bone mass and thus improving the positioning stability.

[0043] Specifically, a second positioning hole 12 is further provided on the main body portion 10 in this embodiment. The second positioning hole 12 extends along the extending direction of the main body portion 10 and is communicatively connected with the first positioning hole 11. When the positioning member 20 is in the initial position, at least a part of the positioning member 20 is located within the second positioning hole 12. The bone filling prosthesis further includes a driving member 30 for being disposed within the second positioning hole 12 so that during the process of the driving member 30 entering the second positioning hole 12, the driving member 30 can push the positioning member 20 to move from the initial position to the positioning position. With such a setting, it is convenient to drive the movement of the positioning member 20, facilitating the smooth movement of the positioning member 20 from the initial position to the positioning position after the main body portion 10 is filled into the bone mass.

[0044] In this embodiment, the positioning member 20 includes a connecting portion 22 and a protruding portion. The connecting portion 22 is movably disposed on the main body portion 10, and the protruding portion is disposed on the connecting portion 22. The protruding portion includes a positioning portion 21 and a contact portion 23. The positioning portion 21 and the contact portion 23 are connected. Specifically, the positioning portion 21 here is a spike structure. The contact portion 23 is used to contact the driving member 30 so that during the process of the driving member 30 entering the second positioning hole 12, the driving member 30 contacts the contact portion 23 to push the positioning portion 21 to move to a position protruding from the main body portion 10. With such a setting, it is convenient for the driving member 30 to push the positioning member 20 to move from the initial position to the positioning position, facilitating the insertion of the positioning portion 21 of the positioning member 20 into the bone mass for positioning.

[0045] Such as Figures 3 to 6As shown, in the first embodiment of the present invention, a bone filling prosthesis is provided, the second positioning hole 12 can be an internal thread hole, and the driving member 30 is provided with an external thread section adapted to the internal thread hole, so that the driving member 30 and the internal thread hole are matched through a threaded connection. With such a setting, the connection between the driving member 30 and the main body 10 is facilitated, and the driving member 30 and the main body 10 are prevented from being separated during the long-term implantation process, thereby improving the filling stability.

[0046] In this embodiment, a mounting hole 31 is provided on the driving member 30 of the bone filling prosthesis, and the mounting hole 31 is located at the end of the driving member 30, so that the operating member can drive the driving member 30 to move in the internal threaded hole after being inserted into the mounting hole 31. Specifically, the mounting hole 31 can be a hexagonal hole, and the end of the operating member is a hexagonal structure. The end of the operating member is inserted into the mounting hole 31, and the driving member 30 is driven to threadably cooperate with the main body 10 by operating the operating member. Specifically, the operating member here can be an inner hexagonal wrench, and the inner hexagonal wrench cooperates with the hexagonal hole to screw the driving member 30 into the second positioning hole 12, so as to facilitate the rotation of the positioning member 20, so as to achieve self-fixation.

[0047] like Figures 7 to 10 As shown, in the second embodiment of the present invention, a bone filling prosthesis is provided, in which the driving member 30 in this embodiment includes a tapered section, and the second positioning hole 12 includes a tapered hole section, so as to be connected by the cooperation of the tapered hole section and the tapered section. With such a cooperation setting, the connection stability between the driving member 30 and the main body 10 can be improved, and the driving member 30 and the main body 10 can be prevented from being separated during long-term implantation, thereby improving the filling stability.

[0048] In this embodiment, the second positioning hole 12 includes a first hole section 121 and a second hole section 122, the first hole section 121 and the second hole section 122 are connected, the first hole section 121 is a first cylindrical hole section, the second hole section 122 is a tapered hole section, the cross-sectional area of ​​the first cylindrical hole section is larger than the cross-sectional area of ​​the tapered hole section, so as to form a first positioning step at the connection between the first cylindrical hole section and the tapered hole section, so as to abut and position the driving member 30 through the first positioning step. With such a setting, the stability of positioning can be further provided, thereby further improving the stability of filling.

[0049] Correspondingly, the driving member 30 in this embodiment includes a first connecting section 32 and a second connecting section 33, the first connecting section 32 is connected to the second connecting section 33, the first connecting section 32 is a first cylindrical section adapted to the first hole section 121, and the second connecting section 33 is a conical section adapted to the second hole section 122. With such a configuration, through the matching driving member 30 and the second positioning hole 12, on the one hand, the driving member 30 can stably drive the positioning member 20 to move to the positioning position, and on the other hand, the driving member 30 can stably cooperate with the second positioning hole 12 to prevent the driving member 30 from falling off from the second positioning hole 12.

[0050] like Figures 11 to 13 As shown, the third embodiment of the present invention provides a bone filling prosthesis, and the difference between the bone filling prosthesis in this embodiment and the bone filling prosthesis in the second embodiment is that the structure of the driving member 30 is different. Specifically, the driving member 30 in this embodiment includes a first connecting section 32 and a second connecting section 33, the first connecting section 32 and the second connecting section 33 are connected, and the second connecting section 33 is a conical section adapted to the second hole section 122. The outer wall surface of the first connecting section 32 includes an arc surface and a plane, the arc surface is connected to the plane, the arc surface is adapted to the inner wall surface of the first hole section 121, and an avoidance interval is formed between the plane and the inner wall surface of the first hole section 121, so as to avoid the positioning member 20 through the avoidance interval. There are multiple positioning members 20 in this embodiment, so that in the process of the driving member 30 entering the second positioning hole 12, by avoiding the avoidance interval, some positioning members 20 can be selectively moved from the initial position to the positioning position, so as to select the corresponding positioning member 20 for positioning according to the actual situation, which is convenient for operation. Specifically, a plane can be milled on the cylindrical segment to form an avoidance interval. With such a configuration, it is convenient to selectively unscrew a portion of the fixing fins (the fixing fins here are the positioning members 20 ) according to clinical needs, so as to achieve self-fixation.

[0051] In the second and third embodiments, the driving member 30 further includes a third connecting segment 34, which is a second cylindrical segment, and is located at one end of the first connecting segment 32 away from the second connecting segment 33. The diameter of the third connecting segment 34 is larger than the diameter of the first connecting segment 32, so as to form a second positioning step at the connection between the third connecting segment 34 and the first connecting segment 32, so that the second positioning step is abutted and positioned with the end of the main body 10. With such a configuration, it is convenient to position the driving member 30 on the main body 10, and the stability of positioning is further improved.

[0052] To facilitate the filling of the driving member 30 in the second embodiment and the third embodiment into the second positioning hole 12, a striking hole 35 is further provided on the driving member 30, so that the positioning member 20 can be installed in the second positioning hole 12 by knocking on the striking hole 35 with an operating member. Specifically, the striking hole 35 is located at the end of the driving member 30, and the striking hole 35 can be a cylindrical hole. The operating member here can be a punch. By knocking on the striking hole 35 with an appropriate punch, taper fitting can be achieved, which is convenient for self-fixation.

[0053] Specifically, in the first embodiment, the second embodiment and the third embodiment, there can be multiple positioning members 20, and the multiple positioning members 20 are arranged at intervals along a ring on the main body portion 10. Specifically, this embodiment includes multiple groups of positioning members 20, and the multiple groups of positioning members 20 are arranged at intervals along a ring on the main body portion 10. Each group of positioning members 20 includes multiple positioning members 20, and the multiple positioning members 20 are arranged at intervals along the extending direction of the main body portion 10. With such an arrangement, it is convenient to drive multiple positioning members 20 into the bone mass for positioning, so as to better improve the stability of positioning, and further improve the stability of filling.

[0054] Specifically, in the first embodiment, the second embodiment and the third embodiment, multiple through holes are provided on the main body portion 10, and the multiple through holes can be communicated with the second positioning hole 12, so that bone chips can enter the multiple through holes during the process of the main body portion 10 entering the bone mass. In this way, by allowing bone chips to enter the multiple through holes, it is convenient for the bone chips to grow into the multiple through holes, which is conducive to the growth combination of the bone filling prosthesis and the bone mass, and further can improve the stability of filling.

[0055] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: The self-fixing bone filling prosthesis provided by the present invention is of an assembled design, and the connection between the driving member and the main body portion is facilitated through forms such as a threaded structure or a taper connection; in clinical use, a doctor can selectively screw out some or all of the positioning members according to the bone mass condition of the patient, so as to achieve fixation.

[0056] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An osteoplasty prosthesis, characterized in that, it includes: a main body part (10) for filling human bone mass; a positioning member (20) movably arranged on the main body part (10), the positioning member (20) having an initial position and a positioning position; when the positioning member (20) is in the initial position, at least part of the positioning member (20) is arranged inside the main body part (10) so that the positioning member (20) avoids the bone mass; when the positioning member (20) is in the positioning position, at least part of the positioning member (20) protrudes from the outer surface of the main body part (10) so that the positioning member (20) is connected to the bone mass; a second positioning hole (12) is arranged on the main body part (10); a plurality of through holes are arranged on the main body part (10), and the plurality of through holes are communicated with the second positioning hole (12) so that during the process of the main body part (10) entering the bone mass, bone chips enter the plurality of through holes; the positioning member (20) is rotatably arranged on the main body part (10) so that the positioning member (20) rotates to the initial position or the positioning position; a first positioning hole (11) is arranged on the main body part (10), and at least part of the positioning member (20) is movably arranged in the first positioning hole (11); when the positioning member (20) is in the initial position, the positioning member (20) is hidden in the first positioning hole (11); when the positioning member (20) is in the positioning position, at least part of the positioning member (20) protrudes from the first positioning hole (11); the second positioning hole (12) extends along the extending direction of the main body part (10), and the second positioning hole (12) is communicated with the first positioning hole (11); when the positioning member (20) is in the initial position, at least part of the positioning member (20) is located in the second positioning hole (12); the osteoplasty prosthesis further includes: a driving member (30) for being arranged in the second positioning hole (12) so that during the process of the driving member (30) entering the second positioning hole (12), the driving member (30) pushes the positioning member (20) to move from the initial position to the positioning position.

2. The osteoplasty prosthesis according to claim 1, characterized in that, the positioning member (20) includes a positioning part (21), when the positioning member (20) is in the initial position, the positioning part (21) is located in the first positioning hole (11); when the positioning member (20) is in the positioning position, the positioning part (21) protrudes from the outer surface of the main body part (10); the positioning part (21) is a spike structure for piercing into the bone mass.

3. The osteoplasty prosthesis according to claim 1, characterized in that, The positioning member (20) includes a connecting portion (22) and a protruding portion. The connecting portion (22) is movably disposed on the main body portion (10), and the protruding portion is disposed on the connecting portion (22). The protruding portion includes a positioning portion (21) and a contact portion (23), and the positioning portion (21) is connected to the contact portion (23). During the process of the driving member (30) entering the second positioning hole (12), the driving member (30) contacts the contact portion (23) to push the positioning portion (21) to move to a position protruding from the main body portion (10).

4. The bone filling prosthesis according to claim 1, wherein, the second positioning hole (12) is an internal threaded hole, and an external threaded section adapted to the internal threaded hole is provided on the driving member (30), so that the driving member (30) is matched with the internal threaded hole through threaded connection.

5. The bone filling prosthesis according to claim 4, wherein, an installation hole (31) is provided on the driving member (30), and the installation hole (31) is located at the end of the driving member (30), so that the operating member drives the driving member (30) to move in the internal threaded hole after being inserted into the installation hole (31).

6. The bone filling prosthesis according to claim 1, wherein, the driving member (30) includes a tapered section, and the second positioning hole (12) includes a tapered hole section, so as to be connected through the cooperation of the tapered hole section and the tapered section.

7. The bone filling prosthesis according to claim 1, wherein, the second positioning hole (12) includes a first hole section (121) and a second hole section (122), the first hole section (121) and the second hole section (122) are communicated, the first hole section (121) is a first cylindrical hole section, the second hole section (122) is a tapered hole section, and the cross-sectional area of the first cylindrical hole section is larger than that of the tapered hole section, so as to form a first positioning step at the connection of the first cylindrical hole section and the tapered hole section, so as to abut and position the driving member (30) through the first positioning step.

8. The bone filling prosthesis according to claim 7, wherein, the driving member (30) includes a first connection section (32) and a second connection section (33), the first connection section (32) is connected to the second connection section (33), the first connection section (32) is a first cylindrical section adapted to the first hole section (121), and the second connection section (33) is a tapered section adapted to the second hole section (122).

9. The bone filling prosthesis according to claim 8, wherein, The driving member (30) includes a first connecting section (32) and a second connecting section (33). The first connecting section (32) is connected to the second connecting section (33). The second connecting section (33) is a tapered section adapted to the second hole section (122). The outer wall surface of the first connecting section (32) includes an arc surface and a flat surface. The arc surface is connected to the flat surface. The arc surface is adapted to the inner wall surface of the first hole section (121). A clearance interval is formed between the flat surface and the inner wall surface of the first hole section (121) to allow the positioning member (20) to pass through the clearance interval for avoidance.

10. The bone filling prosthesis according to claim 8 or 9, wherein, the driving member (30) further includes a third connecting section (34). The third connecting section (34) is a second cylindrical section. The third connecting section (34) is located at one end of the first connecting section (32) away from the second connecting section (33). The diameter of the third connecting section (34) is greater than the diameter of the first connecting section (32) to form a second positioning step at the connection between the third connecting section (34) and the first connecting section (32), so that the second positioning step abuts against and positions the end of the main body portion (10).

11. The bone filling prosthesis according to claim 6, wherein, a percussion hole (35) is further provided on the driving member (30) to install the positioning member (20) in the second positioning hole (12) by knocking on the percussion hole (35) with an operating member.

12. The bone filling prosthesis according to claim 1, wherein, there are a plurality of the positioning members (20), and the plurality of positioning members (20) are arranged at intervals along a ring on the main body portion (10).

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