Bone filling prosthesis

Abstract

The present invention provides a bone filling prosthesis, comprising: a main body, the main body is used to fill the bone of the human body, the main body comprises: a sleeve; a guide structure, the guide structure is arranged at the end of the sleeve; along the extension direction from the sleeve to the guide structure, the thickness of the guide structure gradually decreases to guide the movement of the sleeve under the action of the guide structure; a positioning part, the positioning part is protruding from the outer wall of the sleeve, so that the positioning part penetrates into the bone for positioning. The technical solution provided by the present invention can solve the technical problem of poor filling stability of the bone filling prosthesis in the prior art.

Description

Technical Field

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

[0002] At present, bone defects are a problem that orthopedic surgeons often encounter. Bone defect filling prostheses in the prior art are generally granular, columnar and irregular in shape. Bone filling prostheses generally need to have good stability after implantation in order to achieve a long-term filling effect.

[0003] However, the bone filling prosthesis in the prior art generally does not have a structure for connecting with the human bone, which is not conducive to the fixation of the bone filling prosthesis to the human bone and is not conducive to achieving a long-term filling effect. 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] In order to achieve the above-mentioned purpose, the present invention provides a bone filling prosthesis, comprising: a main body, which is used to fill the bone of the human body, and the main body comprises: a sleeve; a guide structure, which is arranged at the end of the sleeve; along the extension direction from the sleeve to the guide structure, the thickness of the guide structure gradually decreases to guide the movement of the sleeve under the action of the guide structure; a positioning part, which is protruding from the outer wall of the sleeve so that the positioning part penetrates into the bone for positioning.

[0006] Furthermore, the guide structure includes a fan blade, which is arranged at the end of the sleeve, and the fan blade includes an outer surface, an inner surface, a first connecting surface and a second connecting surface. The outer surface is connected to the outer wall surface of the sleeve, and the inner surface is connected to the inner wall surface of the sleeve. The first connecting surface and the second connecting surface are both arranged between the outer surface and the inner surface; the first connecting surface and the second connecting surface are arranged opposite to each other, and the end of the first connecting surface close to the outer surface forms a front edge, and the end of the first connecting surface close to the inner surface forms a rear edge, so that bone chips enter the sleeve along the direction from the front edge to the rear edge.

[0007] Furthermore, there are multiple blades, which are spaced apart along the circumference of the sleeve, and a guide gap is formed between two adjacent blades so that bone chips can enter the sleeve through the guide gap.

[0008] Furthermore, the positioning portion is a threaded structure, so that the sleeve can be inserted into the bone under the action of the threaded structure by rotating the sleeve.

[0009] Furthermore, the positioning portion is a spike structure, so as to penetrate into the bone through the spike structure.

[0010] Furthermore, a through hole is provided on the sleeve, and the through hole is communicated with the inner channel of the sleeve, so that the bone chips introduced into the sleeve by the guide structure can enter the through hole.

[0011] Furthermore, there are a plurality of through holes, and the plurality of through holes are arranged at intervals on the sleeve.

[0012] Furthermore, the bone filling prosthesis further comprises: a filling piece, at least a portion of which is used to be arranged in the inner channel of the sleeve so as to fill the sleeve through the filling piece.

[0013] Furthermore, the filling piece is adjustably arranged on the sleeve, so that the length of the bone filling prosthesis can be adjusted by adjusting the position of the filling piece.

[0014] Furthermore, an internal thread section is provided on the inner wall of the sleeve, and an external thread section matching with the internal thread section is provided on the filling piece, and the external thread section matches with the internal thread section so that the filling piece can be adjusted in position on the sleeve.

[0015] Furthermore, the filling piece includes a main body section and a connecting section, the main body section and the connecting section are connected, the connecting section is used to connect with the sleeve, the end face of the main body section is an arc surface, and the end of the main body section protrudes from the sleeve.

[0016] By applying the technical solution of the present invention, the guiding effect of the guide structure can be set to facilitate the sleeve to enter the human bone, and the positioning part is inserted into the bone to prevent the sleeve from rotating out. At the same time, when it is rotated into place, the positioning part can position the sleeve to avoid the position deviation of the sleeve after long-term implantation, thereby improving the filling stability. Therefore, the technical solution provided by the embodiment of the present invention can solve the technical problem of poor filling stability of bone filling prostheses in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic structural diagram of a bone filling prosthesis with a positioning portion having a threaded structure according to an embodiment of the present invention is shown;

[0019] Figure 2 A front view of a bone filling prosthesis with a positioning portion having a threaded structure provided according to an embodiment of the present invention is shown;

[0020] Figure 3 A schematic structural diagram of a bone filling prosthesis with a locating portion having a spike structure according to an embodiment of the present invention is shown;

[0021] Figure 4A front view of a bone filling prosthesis with a locating portion having a spike structure provided according to an embodiment of the present invention is shown;

[0022] Figure 5 A schematic diagram of the structure of a fan blade according to an embodiment of the present invention when entering bone is shown;

[0023] Figure 6 A partial structural schematic diagram of a fan blade structure after a filling piece provided in an embodiment of the present invention is filled into an inner channel of a sleeve is shown;

[0024] Figure 7 A schematic diagram showing the structure of a filling member provided according to an embodiment of the present invention is shown; and

[0025] Figure 8 A front view of a filling piece provided according to an embodiment of the present invention is shown.

[0026] The above drawings include the following reference numerals:

[0027] 10. Main body; 11. Sleeve; 111. Through hole; 12. Guide structure; 121. Outer surface; 122. Inner surface; 123. First connecting surface; 124. Second connecting surface; 125. Front edge; 126. Rear edge; 13. Positioning portion; 20. Filling piece; 21. External thread section; 22. Main body section; 23. Connecting section. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] like Figures 1 to 8 As shown, an embodiment of the present invention provides a bone filling prosthesis, which includes a main body 10, and the main body 10 is used to fill the bone of the human body. Among them, the main body 10 includes a sleeve 11, a guide structure 12 and a positioning portion 13, and the guide structure 12 is arranged at the end of the sleeve 11. Along the extension direction from the sleeve 11 to the guide structure 12, the thickness of the guide structure 12 gradually decreases, so as to facilitate the movement of the sleeve 11 under the guiding action of the guide structure 12. Specifically, the guide structure 12 is used to cut the bone, so that the sleeve 11 is implanted into the bone under the cutting action of the guide structure 12. Specifically, the positioning portion 13 is arranged to protrude from the outer wall of the sleeve 11, so that the positioning portion 13 penetrates into the bone for positioning.

[0030] With the bone filling prosthesis provided in this embodiment, the guide structure 12 guides the sleeve 11 to be implanted into the bone. As the sleeve 11 enters the human bone, the positioning portion 13 protruding from the outer wall of the sleeve 11 will penetrate into the bone for positioning. With such a setting, the stability of positioning can be improved, and the position displacement of the sleeve 11 after the bone filling prosthesis is implanted for a long time can be avoided, thereby affecting the filling stability. Therefore, with the bone filling prosthesis provided in this embodiment, the technical problem of poor filling stability of the bone filling prosthesis in the prior art can be solved.

[0031] like Figure 5 and Figure 6 As shown, the guide structure 12 in this embodiment includes a fan blade, which is arranged at the end of the sleeve 11. The fan blade includes an outer surface 121, an inner surface 122, a first connecting surface 123 and a second connecting surface 124. The outer surface 121 is connected to the outer wall surface of the sleeve 11, and the inner surface 122 is connected to the inner wall surface of the sleeve 11. The first connecting surface 123 and the second connecting surface 124 are both arranged between the outer surface 121 and the inner surface 122. The outer surface 121, the first connecting surface 123, the inner surface 122 and the second connecting surface 124 are connected in sequence. The first connecting surface 123 and the second connecting surface 124 are arranged opposite to each other, and the end of the first connecting surface 123 close to the outer surface 121 forms a front edge 125, and the end of the first connecting surface 123 close to the inner surface 122 forms a rear edge 126, so that bone chips enter the sleeve 11 along the direction from the front edge 125 to the rear edge 126. Specifically, when the sleeve 11 rotates, the front edge 125 of the blade will cut the bone and guide the bone debris into the inner channel of the sleeve 11, and the positioning portion 13 of the outer surface 121 can prevent the sleeve 11 from withdrawing.

[0032] Specifically, in this embodiment, there are multiple blades, which are spaced apart along the circumference of the sleeve 11, and a guide gap is formed between two adjacent blades, so that bone chips can enter the sleeve 11 through the guide gap. With such a setting, it is easier to cut the bone, so that the sleeve 11 can enter the bone, and it is also easier for bone marrow chips to enter the inner channel of the sleeve 11. Specifically, Figure 5 The dense dots in the middle represent bone, the arrow pointing to the bone represents the direction of entry of bone chips, and the other arrow represents the rotation direction of the sleeve 11.

[0033] like Figure 1 and Figure 2 As shown, the positioning portion 13 can be a threaded structure, so that the sleeve 11 can be inserted into the bone under the action of the threaded structure by rotating the sleeve 11. With such a setting, the structure is simple, easy to manufacture and produce, and the threaded structure can prevent the sleeve 11 from retreating during the process of being screwed into the bone, thereby improving the connection stability between the sleeve 11 and the bone.

[0034] like Figure 3and Figure 4 As shown, the positioning portion 13 can be a spike structure, so that the spike structure can be inserted into the bone. With such a configuration, the structure is simple, easy to manufacture and produce, and the spike structure can prevent the sleeve 11 from withdrawing during the process of screwing into the bone, thereby improving the connection stability between the sleeve 11 and the bone. Specifically, the spike structure can be a triangular prism structure.

[0035] In this embodiment, a through hole 111 is further provided on the sleeve 11, and the through hole 111 is connected to the inner channel of the sleeve 11, so that the bone chips introduced into the sleeve 11 by the guide structure 12 can enter the through hole 111, thereby facilitating the connection between the sleeve 11 and the external bone, which is beneficial to the long-term bone ingrowth of the prosthesis.

[0036] Specifically, in this embodiment, there are a plurality of through holes 111 , and the plurality of through holes 111 are arranged on the sleeve 11 at intervals.

[0037] In this embodiment, the bone filling prosthesis further includes a filling member 20, at least part of which is used to be arranged in the inner channel of the sleeve 11, so as to fill the sleeve 11 through the filling member 20. With such an arrangement, after the filling member 20 fills the inner channel of the sleeve 11, the overall structural stability of the bone filling prosthesis can be improved, so as to improve the filling stability.

[0038] In this embodiment, the filling member 20 is adjustably arranged on the sleeve 11, so that the length of the bone filling prosthesis can be adjusted by adjusting the position of the filling member 20. With such a setting, it is convenient to obtain bone filling prostheses of different lengths according to clinical needs to meet clinical applications.

[0039] Specifically, in this embodiment, an internal thread section is provided on the inner wall of the sleeve 11, and an external thread section 21 matching the internal thread section is provided on the filling member 20. The external thread section 21 matches the internal thread section so that the filling member 20 is adjustably arranged on the sleeve 11. Specifically, the filling member 20 shell is adjusted along the axial direction to achieve the length adjustment of the bone filling prosthesis. The arrangement of the thread structure matching is simple in structure, easy to produce and manufacture, and easy to adjust the length of the bone filling prosthesis.

[0040] By using the bone filling prosthesis provided in this embodiment, after the sleeve 11 is implanted into the bone, the filling piece 20 is implanted. The filling piece 20 can compact the sparse bone chips and even press them into multiple through holes 111, thereby achieving connectivity with external bone, which is beneficial to the long-term ingrowth of the bone filling prosthesis and more beneficial to the long-term fixation of the bone filling prosthesis.

[0041] In this embodiment, the filling member 20 includes a main body section 22 and a connecting section 23, the main body section 22 and the connecting section 23 are connected, the connecting section 23 is used to connect with the sleeve 11, the end surface of the main body section 22 is an arc surface, and the end of the main body section 22 protrudes from the sleeve 11. Specifically, the end surface of the main body section 22 is a smooth spherical surface, so as to facilitate the filling of bone and better improve the stability of the filling.

[0042] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: the present invention is a modular bone filling prosthesis, which adopts a modular design; wherein the main body can prevent loosening and achieve long-term biological fixation; and the filling piece can fill the bone defect.

[0043] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0044] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0045] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0046] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0047] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bone filling prosthesis, It is characterized in that The bone filling prosthesis comprises a main body (10), and the main body (10) is used to fill the bone of a human body. The main body (10) comprises: Sleeve (11); a guide structure (12), the guide structure (12) being arranged at an end of the sleeve (11); along an extending direction from the sleeve (11) to the guide structure (12), the thickness of the guide structure (12) gradually decreases, so as to guide the movement of the sleeve (11) under the guiding action of the guide structure (12); A positioning portion (13), the positioning portion (13) being arranged to protrude from the outer wall of the sleeve (11) so that the positioning portion (13) can penetrate into the bone for positioning; The guide structure (12) comprises a fan blade, which is arranged at the end of the sleeve (11), and the fan blade comprises an outer surface (121), an inner surface (122), a first connecting surface (123) and a second connecting surface (124), the outer surface (121) is connected to the outer wall surface of the sleeve (11), the inner surface (122) is connected to the inner wall surface of the sleeve (11), and the first connecting surface (123) and the second connecting surface (124) are both arranged at the The first connecting surface (123) and the second connecting surface (124) are arranged opposite to each other, and one end of the first connecting surface (123) close to the outer surface (121) forms a front edge (125), and one end of the first connecting surface (123) close to the inner surface (122) forms a rear edge (126), so that bone chips can enter the sleeve (11) along the direction from the front edge (125) to the rear edge (126); There are a plurality of blades, which are spaced apart along the circumference of the sleeve (11), and a guide gap is formed between two adjacent blades so that bone chips can enter the sleeve (11) through the guide gap.

2. The bone filling prosthesis according to claim 1, It is characterized in that The positioning portion (13) is a threaded structure, so that the sleeve (11) can be inserted into the bone under the action of the threaded structure by rotating the sleeve (11).

3. The bone filling prosthesis according to claim 1, It is characterized in that The positioning portion (13) is a spike structure, so as to penetrate into the bone through the spike structure.

4. The bone filling prosthesis according to claim 1, It is characterized in that The sleeve (11) is also provided with a through hole (111), and the through hole (111) is communicated with the inner channel of the sleeve (11), so that bone chips introduced into the sleeve (11) by the guide structure (12) can enter the through hole (111).

5. The bone filling prosthesis according to claim 4, It is characterized in that There are a plurality of through holes (111), and the plurality of through holes (111) are arranged at intervals on the sleeve (11).

6. The bone filling prosthesis according to claim 1, It is characterized in that The bone filling prosthesis also includes: A filling piece (20), at least a portion of which is arranged in an inner channel of the sleeve (11), so as to fill the sleeve (11) through the filling piece (20).

7. The bone filling prosthesis according to claim 6, It is characterized in that The filling piece (20) is adjustably arranged on the sleeve (11) so as to adjust the length of the bone filling prosthesis by adjusting the position of the filling piece (20).

8. The bone filling prosthesis according to claim 7, It is characterized in that An internal thread section is provided on the inner wall of the sleeve (11), and an external thread section (21) matching with the internal thread section is provided on the filling piece (20). The external thread section (21) matches with the internal thread section so that the filling piece (20) can be adjusted in position on the sleeve (11).

9. The bone filling prosthesis according to claim 6, It is characterized in that The filling piece (20) comprises a main body section (22) and a connecting section (23), wherein the main body section (22) and the connecting section (23) are connected to each other, and the connecting section (23) is used to be connected to the sleeve (11). The end surface of the main body section (22) is an arc surface, and the end of the main body section (22) is protruding from the sleeve (11).

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