Hip joint prosthesis

Abstract

The application provides a hip joint prosthesis, which comprises a proximal femoral stem, an elongated stem and a filling assembly, the filling assembly is arranged between the proximal femoral stem and the elongated stem to connect the proximal femoral stem and the elongated stem, wherein the filling assembly comprises a first adjusting part and a filling piece, the first adjusting part and the filling piece are detachably connected, the first adjusting part is used for being connected with the elongated stem, and the filling piece is used for being connected with the proximal femoral stem; the filling piece comprises a second adjusting part, the second adjusting part has an extension part, the extension part is movably arranged, the area of the outer circumferential surface of the second adjusting part is increased by pushing the extension part to move, the outer circumferential surface of the second adjusting part can be in contact with the bone defect of the corresponding hip joint, and the effect that the second adjusting part is well matched with the bone defect of the corresponding hip joint is achieved; it can be seen that the hip joint prosthesis can meet different hip joint bone defect situations and has good universality.

Description

TECHNICAL FIELD

[0001] The present application relates to the medical field, in particular to a hip joint prosthesis. BACKGROUND

[0002] Regarding total hip arthroplasty, the primary replacement prosthesis and the diseased bone are removed at the time of revision, which will cause a certain degree of bone defect, and the position and degree of bone defect are different for different people.

[0003] In dealing with the problem of total hip bone defect, hip joint prosthesis is usually needed, and the filling part of the existing hip joint prosthesis has a fixed structure and poor flexibility, which cannot be properly adjusted according to different bone defect positions and degrees to make it better filling. Although the patient can be customized with hip joint prosthesis to make its filling part better match the bone defect of each patient to meet the needs of each patient, the customized hip joint prosthesis has a long customization period and is expensive, and the customized hip joint prosthesis also does not have universality. SUMMARY

[0004] The main purpose of the present application is to provide a hip joint prosthesis to solve the problem that the hip joint prosthesis in the prior art does not have universality.

[0005] In order to achieve the above purpose, the present application provides a hip joint prosthesis, which comprises a proximal femoral stem, an extension stem and a filling assembly, the filling assembly is arranged between the proximal femoral stem and the extension stem to connect the proximal femoral stem and the extension stem; wherein the filling assembly comprises a first adjusting part and a filling part, the first adjusting part and the filling part are detachably connected, the first adjusting part is used to connect with the extension stem, and the filling part is used to connect with the proximal femoral stem; the filling part comprises a second adjusting part, the second adjusting part has an extension part, the extension part is movably arranged to increase the area of the outer circumferential surface of the second adjusting part by pushing the extension part to move.

[0006] Further, the hip joint prosthesis further comprises a connecting sleeve, the connecting sleeve is used to connect with the proximal femoral stem, the filling part has a filling channel, and the connecting sleeve is rotatably inserted into the filling channel to make the connecting sleeve drive the proximal femoral stem to rotate relative to the filling part.

[0007] Further, the proximal femoral stem comprises a femoral column, the sleeve cavity of the connecting sleeve is matched with the femoral column, and the femoral column is inserted into the sleeve cavity; along the insertion direction of the femoral column, the cross-sectional area of the femoral column gradually decreases, wherein the cross-sectional area of the femoral column is the area of the section of the femoral column perpendicular to the extension direction of the femoral column.

[0008] Further, the second adjusting part has a positioning hole, the telescopic parts are multiple, the multiple telescopic parts are arranged around the positioning hole, the first adjusting part is inserted into the positioning hole, and the telescopic parts are maintained at the initial position or pushed out by cooperation of the first adjusting part and the positioning hole, so that the area of the outer circumferential surface of the second adjusting part is adjusted.

[0009] Further, the first adjusting part has multiple specifications, the areas of the outer circumferential surfaces of the first adjusting parts with the multiple specifications are different, the telescopic parts are selectively maintained at the initial position or pushed out by selecting the first adjusting part with the corresponding specification and inserting the first adjusting part into the positioning hole.

[0010] Further, the cross-sectional area of the first adjusting part gradually decreases along the insertion direction of the first adjusting part, so that the outer circumferential area of the second adjusting part is adjusted by controlling the insertion depth of the first adjusting part; wherein the cross-sectional area of the first adjusting part is the area of the section of the first adjusting part perpendicular to the extension direction of the first adjusting part.

[0011] Further, the outer circumferential wall of at least part of the first adjusting part is provided with external threads, the inner circumferential wall of the positioning hole is provided with internal threads matched with the external threads, and the first adjusting part and the second adjusting part are screwed by cooperation of the external threads and the internal threads.

[0012] Further, the first adjusting part comprises: an operating part, the operating part is provided with an assembly groove; and a connecting part, the operating part is arranged on the connecting part, and the outer circumferential wall of at least part of the connecting part is provided with external threads.

[0013] Further, the second adjusting part comprises multiple adjusting gaps, the multiple adjusting gaps are arranged at intervals around the circumference of the second adjusting part, each adjusting gap is in communication with the positioning hole, and the telescopic part is formed between adjacent two adjusting gaps.

[0014] Further, the extension handle comprises an extension handle body and a plug-in part, the plug-in part is arranged on the extension handle, the first adjusting part has a plug-in hole matched with the plug-in part, the extension handle is detachably connected with the first adjusting part by inserting at least part of the plug-in part into the plug-in hole.

[0015] Further, the plug-in part is a columnar structure, the cross-sectional area of the plug-in part gradually decreases along the insertion direction of the plug-in part; wherein the cross-sectional area of the plug-in part is the area of the section of the plug-in part perpendicular to the extension direction of the plug-in part.

[0016] Further, the extension handle body is provided with an anti-rotation ridge structure, the anti-rotation ridge structure comprises multiple ridge-shaped protrusions, the multiple ridge-shaped protrusions are arranged at intervals around the circumference of the extension handle body, and each ridge-shaped protrusion is arranged along the extension direction of the extension handle body.

[0017] Further, the elongated handle body is provided with a tuning fork structure, the tuning fork structure comprises a plurality of elastic openings, the plurality of elastic openings are arranged at intervals around the circumference of the elongated handle body, and each elastic opening is arranged along the extension direction of the elongated handle body.

[0018] Further, the filling block is provided with the filling channel and the second adjusting part, and the filling block comprises a filling part and a cutting part arranged oppositely; wherein the filling part is used for filling the hip joint bone defect of the patient.

[0019] Further, the proximal part of the femoral stem further comprises a femoral platform arranged on the femoral column, and a femoral stem body part arranged on the femoral platform and arranged at a predetermined angle with the femoral platform; wherein the end of the femoral stem body part close to the femoral platform is provided with a femoral neck.

[0020] The hip joint prosthesis comprises a proximal part of a femoral stem, an elongated handle and a filling assembly arranged between the proximal part of the femoral stem and the elongated handle to connect the proximal part of the femoral stem and the elongated handle; wherein the filling assembly comprises a first adjusting part and a filling piece, the first adjusting part and the filling piece are detachably connected, the first adjusting part is used for connecting with the elongated handle, and the filling piece is used for connecting with the proximal part of the femoral stem; the filling piece comprises a second adjusting part, the second adjusting part has an extension part which is movably arranged to increase the area of the outer circumferential surface of the second adjusting part by pushing the extension part to move, so that the outer circumferential surface of the second adjusting part can be in contact with the bone defect of the corresponding hip joint, thereby achieving the effect that the second adjusting part is well matched with the bone defect of the corresponding hip joint, that is, the filling assembly of the hip joint prosthesis can well adapt to the bone defect situation of the corresponding hip joint; it can be seen that the hip joint prosthesis can meet different hip joint bone defect situations by adjusting the area of the outer circumferential surface of the second adjusting part, which makes the hip joint prosthesis have good versatility, thereby solving the problem that the hip joint prosthesis in the prior art does not have versatility. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the application, and together with the description of the exemplary embodiments of the application given below, make an explanation of the application complete, and are not intended to limit the application unduly. In the drawings:

[0022] Figure 1 An exploded structural view of a hip joint prosthesis according to an embodiment of the hip joint prosthesis of the application is shown;

[0023] Figure 2 An exploded structural view of a hip joint prosthesis according to an embodiment of the hip joint prosthesis of the application is shown; Figure 1

[0024] Figure 3 An exploded structural view of a hip joint prosthesis according to an embodiment of the hip joint prosthesis of the application is shown;​Figure 1 Fig. 6 is a schematic diagram showing the external structure of the first adjustment part of the hip joint prosthesis in Fig. 1;

[0025] Figure 4 Fig. 7 is a schematic diagram showing the internal cross-sectional structure of the first adjustment part of the hip joint prosthesis in Fig. 1; Figure 3

[0026] Figure 5 Fig. 8 is a schematic diagram showing the external structure of the filler of the hip joint prosthesis in Fig. 1; Figure 1

[0027] Figure 6 Fig. 9 is a schematic diagram showing the internal cross-sectional structure of the filler of the hip joint prosthesis in Fig. 1; Figure 5

[0028] Figure 7 Fig. 10 is a schematic diagram showing the structure of the proximal part of the femoral stem of the hip joint prosthesis in Fig. 1; Figure 1

[0029] Figure 8 Fig. 11 is a schematic diagram showing the structure of the extension stem of the hip joint prosthesis in Fig. 1; Figure 1

[0030] Figure 9 Fig. 12 is a bottom view of the extension stem of the hip joint prosthesis in Fig. 1; and Figure 8

[0031] Figure 10 Fig. 13 is a schematic diagram showing the internal cross-sectional structure of the connecting sleeve of the hip joint prosthesis in Fig. 1. Figure 1

[0032] In the above drawings, the following reference signs apply:

[0033] 10, proximal part of femoral stem; 11, femoral platform; 12, femoral neck; 13, femoral column; 14, body part of femoral stem; 40, filler; 43, filler channel; 45, filler block; 451, filler part; 452, cutting part; 47, second adjustment part; 472, positioning hole; 473, adjustment gap; 474, telescopic part; 50, extension stem; 51, body of extension stem; 511, ridge-shaped protrusion; 512, tuning fork structure; 513, elastic opening; 52, insertion part; 60, first adjustment part; 61, operation part; 62, connecting part; 63, assembly groove; 64, insertion hole; 70, connecting sleeve; 72, sleeve cavity; 80, hip joint prosthesis. DETAILED DESCRIPTION

[0034] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0035] ​​​​​​​The present invention provides a hip joint prosthesis 80, please refer to Figures 1 to 10 The hip joint prosthesis 80 includes a proximal portion of the femoral stem 10, an extension stem 50 and a filling assembly. The filling assembly is arranged between the proximal portion of the femoral stem 10 and the extension stem 50 to connect the proximal portion of the femoral stem 10 and the extension stem 50; wherein the filling assembly includes a first adjustment portion 60 and a filling piece 40, the first adjustment portion 60 and the filling piece 40 are detachably connected, the first adjustment portion 60 is used to connect with the extension stem 50, and the filling piece 40 is used to connect with the proximal portion of the femoral stem 10; the filling piece 40 includes a second adjustment portion 47, the second adjustment portion 47 has a telescopic portion 474, the telescopic portion 474 is movably arranged to increase the area of ​​the outer peripheral surface of the second adjustment portion 47 by pushing the telescopic portion 474 to move.

[0036] In the hip joint prosthesis 80 of the present invention, the filling assembly of the hip joint prosthesis 80 includes a first adjustment portion 60 and a filling piece 40, and the filling piece 40 includes a second adjustment portion 47. The second adjustment portion 47 has a telescopic portion 474, and the telescopic portion 474 is movably arranged to increase the area of ​​the outer peripheral surface of the second adjustment portion 47 by pushing the telescopic portion 474 to move, so that the outer peripheral surface of the second adjustment portion 47 can fit in contact with the bone defect of the corresponding hip joint, thereby achieving an effect of better matching between the second adjustment portion 47 and the corresponding bone defect of the hip joint, that is, the filling assembly of the hip joint prosthesis 80 can better adapt to the corresponding hip joint bone defect situation; it can be seen that the hip joint prosthesis 80 can meet different hip joint bone defect situations by adjusting the area of ​​the outer peripheral surface of the second adjustment portion 47, which makes the hip joint prosthesis 80 have good versatility, thereby solving the problem that the hip joint prosthesis in the prior art does not have versatility.

[0037] In order to realize the assembly between the proximal end portion 10 of the femoral stem and the filling member 40, as shown in FIG. Figure 2 and Figure 10 As shown, the hip joint prosthesis also includes a connecting sleeve 70, which is used to connect to the proximal portion 10 of the femoral stem. The filling piece 40 has a filling channel 43. The connecting sleeve 70 can be rotatably inserted into the filling channel 43 so that the connecting sleeve 70 drives the proximal portion 10 of the femoral stem to rotate relative to the filling piece 40, thereby changing the position of the proximal portion 10 of the femoral stem relative to the filling piece 40.

[0038] In order to realize the assembly between the proximal part 10 of the femoral stem and the sleeve cavity 72, the proximal part 10 of the femoral stem comprises a femoral column 13, the sleeve cavity 72 of the connecting sleeve 70 is matched with the femoral column 13, and the femoral column 13 is inserted into the sleeve cavity 72; along the insertion direction of the femoral column 13, the cross-sectional area of the femoral column 13 gradually decreases, wherein the cross-sectional area of the femoral column 13 is the area of the section of the femoral column 13 perpendicular to the extension direction of the femoral column 13; this not only makes the structure of the connecting sleeve 70 and the femoral column 13 after assembly more stable, but also makes the operation of inserting the femoral column 13 into the sleeve cavity 72 more convenient. In the embodiment, the "insertion direction of the femoral column 13" is the direction of the femoral column 13 towards the connecting sleeve 70.

[0039] Optionally, the top wall of the connecting sleeve 70 is flush with the top wall of the filler 40, so that at least part of the bottom wall of the proximal part 10 of the femoral stem can be in contact with at least part of the top wall of the filler 40, which is conducive to strengthening the overall structural stability of the hip joint prosthesis 80, and also makes the structure of the hip joint prosthesis 80 more compact and regular.

[0040] Specifically, the second adjusting part 47 has a positioning hole 472, and a plurality of telescopic parts 474 are arranged around the positioning hole 472, the first adjusting part 60 is inserted into the positioning hole 472, and the area of the outer circumferential surface of the second adjusting part 47 is adjusted by cooperating the first adjusting part 60 with the positioning hole 472 to maintain the telescopic parts 474 at the initial position or push the telescopic parts 474 outward. When the telescopic parts 474 are maintained at the initial position, the area of the outer circumferential surface of the second adjusting part 47 is the initial area, and when the telescopic parts 474 are pushed outward, the area of the outer circumferential surface of the second adjusting part 47 can be increased, so that the outer circumferential surface of the second adjusting part 47 is more closely in contact with the bone defect of the corresponding hip joint.

[0041] It should be noted that the "pushing the telescopic parts 474 outward" mentioned above is pushing the telescopic parts 474 to move in a direction away from the positioning hole 472.

[0042] Specifically, the first adjusting portion 60 has various specifications, and the outer peripheral surface areas of the various specifications of the first adjusting portion 60 are different. By selecting a first adjusting portion 60 of a corresponding specification and inserting the first adjusting portion 60 into the positioning hole 472, the telescopic portion 474 can be selectively maintained in the initial position or moved outward. Optionally, the first adjusting portion 60 has a standard specification and a larger specification, where the larger specification refers to a size larger than the standard specification. When the standard specification first adjusting portion 60 is selected, the telescopic portion 474 is maintained in the initial position, and the outer peripheral surface area of ​​the second adjusting portion 47 is the initial area. When the larger specification first adjusting portion 60 is selected, after the first adjusting portion 60 is inserted into the positioning hole 472, the first adjusting portion 60 generates a thrust on the telescopic portion 474, pushing the telescopic portion 474 outward. It can be seen that by selecting first adjustment parts 60 of different specifications to cooperate with the second adjustment part 47, the area of ​​the outer peripheral surface of the second adjustment part 47 can be adjusted to adapt to different hip joint bone defect situations, thereby making the hip joint prosthesis 80 have better versatility.

[0043] Optionally, the first adjustment portion 60 is a columnar structure and the positioning hole 472 is a columnar hole; preferably, the first adjustment portion 60 is a roughly cylindrical structure having a standard diameter specification and a larger diameter specification, and the larger diameter specification means that its diameter is larger than the standard diameter.

[0044] Alternatively, the first adjustment portion 60 may be designed as a variable-size structure. Specifically, the cross-sectional area of ​​the first adjustment portion 60 gradually decreases along the insertion direction of the first adjustment portion 60, so as to adjust the outer peripheral area of ​​the second adjustment portion 47 by controlling the insertion depth of the first adjustment portion 60. The cross-sectional area of ​​the first adjustment portion 60 is the area of ​​the cross section of the first adjustment portion 60 perpendicular to the extension direction of the first adjustment portion 60. In a specific implementation, the first adjustment portion 60 is operated to be inserted deeper into the positioning hole 472. As the first adjustment portion 60 is inserted deeper into the positioning hole 472, the first adjustment portion 60 can continuously generate a thrust on the telescopic portion 474 and push the telescopic portion 474 to move continuously outward. As the telescopic portion 474 continues to move outward, the outer peripheral area of ​​the second adjustment portion 47 gradually increases until the outer peripheral area of ​​the second adjustment portion 47 is in contact with the corresponding hip joint bone defect. At this point, the second adjustment portion 47 forms a good match with the corresponding hip joint bone defect, and the operation of the first adjustment portion 60 is stopped. It can be seen that the first adjustment part 60 with a variable size structure can adjust the area of ​​the outer peripheral surface of the second adjustment part 47 by controlling the depth of the first adjustment part 60 inserted into the positioning hole 472, so that it can adapt to different hip joint bone defect situations, thereby making the hip joint prosthesis 80 have better versatility.

[0045] Specifically, if Figure 3As shown, the outer peripheral wall of at least part of the first adjusting part 60 is provided with external threads, for example, the first adjusting part 60 is a bolt; the inner peripheral wall of the positioning hole 472 is provided with internal threads matched with the external threads, and the first adjusting part 60 and the second adjusting part 47 are screwed through the cooperation of the external threads and the internal threads. In the specific implementation process, the first adjusting part 60 can be inserted into the positioning hole 472 by screwing the first adjusting part 60, or the depth of the first adjusting part 60 inserted into the positioning hole 472 can be controlled by screwing the first adjusting part 60.

[0046] In the specific implementation process, the first adjusting part 60 includes an operating part 61 and a connecting part 62; the operating part 61 is arranged on the connecting part 62, and the outer peripheral wall of at least part of the connecting part 62 is provided with external threads; the operating part 61 is provided with an assembly groove 63, and the first adjusting part 60 can be operated by using an assembly tool and allowing the assembly tool to act on the assembly groove 63, so as to insert the first adjusting part 60 into the positioning hole 472. Optionally, the assembly groove 63 is a cross-shaped groove; the assembly groove 63 is arranged on the top wall of the operating part 61, and the connecting part 62 is arranged at the bottom of the operating part 61.

[0047] Specifically, as shown in Figure 5 and Figure 6 The second adjusting part 47 includes a plurality of adjusting notches 473, which are arranged at intervals around the circumference of the second adjusting part 47; each adjusting notch 473 is in communication with the positioning hole 472, and the adjacent two adjusting notches 473 form an expansion part 474, so that each expansion part 474 can be deformed under the pushing force of the first adjusting part 60, and the part of the second adjusting part 47 surrounded by the plurality of expansion parts 474 has an elastic effect. Optionally, the adjusting notch 473 is a strip-shaped notch.

[0048] In order to realize the assembly between the extension handle 50 and the first adjusting part 60, so that the extension handle 50 is connected with the filling piece 40 through the first adjusting part 60, as shown in Figure 4 and Figure 8 The extension handle 50 includes an extension handle body 51 and a plug-in part 52, and the plug-in part 52 is arranged on the extension handle 50; the first adjusting part 60 has a plug-in hole 64 matched with the plug-in part 52, so that the extension handle 50 and the first adjusting part 60 are detachably connected by inserting at least part of the plug-in part 52 into the plug-in hole 64. Optionally, the plug-in part 52 is arranged at the top of the extension handle body 51.

[0049] Specifically, the insertion part 52 is a columnar structure, and the insertion hole 64 is a columnar hole; the cross-sectional area of the insertion part 52 gradually decreases from the insertion direction of the insertion part 52; wherein the cross-sectional area of the insertion part 52 is the area of the section of the insertion part 52 perpendicular to the extension direction of the insertion part 52. This not only enables the insertion part 52 to be more stably inserted into the insertion hole 64, thereby making the structure of the assembly of the extension handle 50 and the first adjusting part 60 more stable, but also makes the operation of inserting the insertion part 52 into the insertion hole 64 more convenient. In the present embodiment, the "insertion direction of the insertion part 52" is the direction in which the insertion part 52 faces the first adjusting part 60.

[0050] Specifically, the extension handle body 51 is provided with an anti-rotation ridge structure, which comprises a plurality of ridge-shaped protrusions 511 spaced apart around the circumference of the extension handle body 51; each ridge-shaped protrusion 511 is arranged along the extension direction of the extension handle body 51. By providing the anti-rotation ridge structure on the extension handle body 51, the rotation of the extension handle 50 in the bone marrow cavity can be prevented, thereby ensuring the stability of the hip joint prosthesis 80 after being implanted into the human body.

[0051] Specifically, as shown in Figure 8 and Figure 9 , the extension handle body 51 is provided with a tuning fork structure 512, which comprises a plurality of elastic openings 513 spaced apart around the circumference of the extension handle body 51, each of which is arranged along the extension direction of the extension handle body 51; optionally, the tuning fork structure 512 is arranged on the extension handle body 51 near its lower end, which can cause the lower end of the extension handle body 51 to deform slightly under external force, i.e., the lower end of the extension handle body 51 has a certain degree of elastic effect, which can cause the extension handle body 51 to deform slightly according to the actual shape of the bone marrow cavity, so that the outer peripheral wall of the extension handle body 51 closely fits the cavity wall of the bone marrow cavity, and the extension handle body 51 is more stably accommodated in the bone marrow cavity; it can be seen that the provision of the tuning fork structure 512 on the extension handle body 51 can make the extension handle body 51 better adapt to different bone marrow cavities, which helps to improve the versatility of the extension handle 50. In addition, the better adaptive fit between the extension handle body 51 and the bone marrow cavity can also reduce the pain of the patient, thereby improving the comfort of the patient after the hip joint prosthesis 80 is implanted into the human body. Optionally, the elastic openings 513 are four, so that the tuning fork structure 512 forms a cross-shaped tuning fork.

[0052] Specifically, as shown in Figure 5 and Figure 6As shown, the filler 40 further comprises a filler block 45, the filler channel 43 is arranged on the filler block 45, and the second adjusting part 47 is arranged on the filler block 45; optionally, the filler channel 43 penetrates through the top wall of the filler block 45; the second adjusting part 47 is arranged at the bottom of the filler block 45, the second adjusting part 47 is in a columnar structure, and the telescopic part 474 is arranged at the bottom end of the second adjusting part 47; the filler channel 43 is in communication with the positioning hole 472. The filler block 45 comprises oppositely arranged filler parts 451 and cutting parts 452; wherein, the filler parts 451 are used to fill the hip joint bone defect of the patient.

[0053] In order to ensure the overall structural strength of the filler 40, the filler block 45 and the second adjusting part 47 are in an integral molding structure.

[0054] Specifically, as shown, Figure 7 The proximal femoral stem 10 further comprises a femoral platform 11 and a femoral stem body part 14; the femoral platform 11 is arranged on the femoral column 13; the femoral stem body part 14 is arranged on the femoral platform 11, and the femoral stem body part 14 is arranged at a predetermined angle with the femoral platform 11; wherein, the end of the femoral stem body part 14 close to the femoral platform 11 is provided with a femoral cutting neck 12. In the specific implementation process, the connecting sleeve 70 is rotated relative to the filler 40, and the connecting sleeve 70 drives the femoral platform 11 and the femoral stem body part 14 to rotate synchronously through the femoral column 13, wherein, the position of the femoral stem body part 14 relative to the filler 40 changes, which can make the relative position between the filler part 451 of the filler 40 and the corresponding bone defect unchanged, that is, the relative position between the filler part 451 of the filler 40 and the corresponding bone defect does not change, so that the femoral stem body part 14 can be connected with the corresponding femur in the human body according to the actual needs by rotating the connecting sleeve 70, and the femoral stem body part 14 can achieve a better matching effect with the corresponding femur in the human body. Optionally, the femoral platform 11 is arranged at the upper part of the femoral column 13, and the femoral stem body part 14 is arranged at the upper part of the femoral platform 11; when the femoral column 13 is inserted into the filler channel 43, at least part of the bottom wall of the femoral platform 11 is in contact with at least part of the top wall of the filler block 45, so that the overall structure of the hip joint prosthesis 80 is more stable, compact and regular.

[0055] Optionally, the femoral stem body 14 is a columnar structure, preferably, the femoral stem body 14 is a cylindrical structure, and the diameter of the femoral stem body 14 gradually decreases from the direction away from the femoral platform 11. The femoral neck 12 is at least part of the peripheral wall of the end of the femoral stem body 14 close to the femoral platform 11 is inwardly recessed to form a generally necked plane structure; in the specific operation process, at least part of the corresponding position of the femoral stem body 14 is removed along the circumferential direction of the femoral stem body 14 to form a generally necked plane structure; this can avoid the end of the femoral stem body 14 close to the femoral platform 11 from colliding with the acetabular part in the human body when the hip joint system in the human body is active after the hip joint prosthesis 80 is implanted in the human body, thereby ensuring the activity effect of the entire hip joint system.

[0056] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0057] In the hip joint prosthesis 80 of the present application, the hip joint prosthesis 80 comprises a femoral stem proximal part 10, an extension stem 50 and a filling assembly, the filling assembly is arranged between the femoral stem proximal part 10 and the extension stem 50 to connect the femoral stem proximal part 10 and the extension stem 50; wherein the filling assembly comprises a first adjusting part 60 and a filling piece 40, the first adjusting part 60 and the filling piece 40 are detachably connected, the first adjusting part 60 is used to connect with the extension stem 50, and the filling piece 40 is used to connect with the femoral stem proximal part 10; the filling piece 40 comprises a second adjusting part 47, the second adjusting part 47 has a telescopic part 474, the telescopic part 474 is movably arranged to increase the area of the outer circumferential surface of the second adjusting part 47 by pushing the telescopic part 474 to move, so that the outer circumferential surface of the second adjusting part 47 can be in contact with the bone defect of the corresponding hip joint, thereby achieving the effect that the second adjusting part 47 is well matched with the bone defect of the corresponding hip joint, that is, the filling assembly of the hip joint prosthesis 80 can well adapt to the bone defect situation of the corresponding hip joint; it can be seen that the hip joint prosthesis 80 can adjust the size of the area of the outer circumferential surface of the second adjusting part 47 to meet different hip joint bone defect situations, which makes the hip joint prosthesis 80 have good universality, thereby solving the problem that the hip joint prosthesis in the prior art does not have universality.

[0058] In addition, in the hip joint prosthesis 80, the proximal end part 10 of the femoral stem and the filler 40, the first adjusting part 60 and the filler 40, and the first adjusting part 60 and the extension stem 50 are detachably connected, that is, the hip joint prosthesis 80 is assembled by the proximal end part 10 of the femoral stem, the filler 40, the first adjusting part 60 and the extension stem 50, and in the actual application process, the above-mentioned components with the most matching specifications can be selected according to the actual situation of the bone defect to assemble the most adaptive hip joint prosthesis 80; and the detachable connection between the components also makes the assembly and disassembly of the hip joint prosthesis 80 more convenient, which is beneficial to increase the convenience of implanting the hip joint prosthesis 80.

[0059] In addition, the hip joint prosthesis 80 provided by the application avoids opening a connecting hole on the proximal end part 10 of the femoral stem to connect the proximal end part 10 of the femoral stem and the extension stem 50 through the connecting hole, which helps to strengthen the overall structural strength of the proximal end part 10 of the femoral stem, and further ensures the overall structural strength of the hip joint prosthesis 80.

[0060] For the convenience of description, spatial relative terms such as "on", "above", "upper surface", "upper", and the like can be used herein to describe the spatial positional relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "on" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0061] It should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0062] It has to be noted that the terms "first", "second", and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the use of these terms is interchangeable under appropriate circumstances and the embodiments of the present application are capable of operation in other sequences than described or illustrated herein. Moreover, the terms "comprise", "have" and any variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises, has or includes a list of elements is not necessarily limited to those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0063] The preferred embodiments of the application are described above in detail. The application is not limited to the embodiments described above, but can vary and be modified in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application should be included in the scope of the protection of the application.

Claims

1. A hip joint prosthesis, characterized in that: include: proximal portion of the femoral stem (10); Extension handle (50); A filling assembly, the filling assembly being arranged between the proximal portion of the femoral stem (10) and the extended stem (50) to connect the proximal portion of the femoral stem (10) and the extended stem (50); The filling assembly comprises a first adjusting portion (60) and a filling piece (40), wherein the first adjusting portion (60) and the filling piece (40) are detachably connected, the first adjusting portion (60) is used to be connected to the extension stem (50), and the filling piece (40) is used to be connected to the proximal end portion (10) of the femoral stem; The filling member (40) includes a second adjusting portion (47), the second adjusting portion (47) having an adjustable outer peripheral surface, the second adjusting portion (47) having a telescopic portion (474), the telescopic portion (474) being movably arranged to increase the area of ​​the outer peripheral surface by pushing the telescopic portion (474) to move; A connecting sleeve (70), the connecting sleeve (70) being used to connect to the proximal portion of the femoral stem (10), the filling piece (40) having a filling channel (43), the connecting sleeve (70) being rotatably inserted into the filling channel (43), so that the connecting sleeve (70) drives the proximal portion of the femoral stem (10) to rotate relative to the filling piece (40); The second adjusting portion (47) has a positioning hole (472), the telescopic portion (474) is multiple, and the multiple telescopic portions (474) are arranged around the positioning hole (472), and the first adjusting portion (60) is inserted into the positioning hole (472). The first adjusting portion (60) cooperates with the positioning hole (472) to maintain the telescopic portion (474) in an initial position or push the telescopic portion (474) outward to adjust the area of ​​the outer peripheral surface of the second adjusting portion (47).

2. The hip joint prosthesis according to claim 1, characterized in that The proximal portion of the femoral stem (10) includes a femoral column (13), the sleeve cavity (72) of the connecting sleeve (70) is adapted to the femoral column (13), and the femoral column (13) is inserted into the sleeve cavity (72); Along the insertion direction of the femoral column (13), the cross-sectional area of ​​the femoral column (13) gradually decreases, wherein the cross-sectional area of ​​the femoral column (13) is the area of ​​the cross section of the femoral column (13) perpendicular to the extension direction of the femoral column (13).

3. The hip joint prosthesis according to claim 1, characterized in that The first adjusting portion (60) has various specifications, and the areas of the outer peripheral surfaces of the first adjusting portions (60) of various specifications are different. By selecting the first adjusting portion (60) of the corresponding specification and inserting the first adjusting portion (60) into the positioning hole (472), the telescopic portion (474) can be selectively maintained at the initial position or moved outward.

4. The hip joint prosthesis according to claim 1, characterized in that Along the insertion direction of the first adjusting portion (60), the cross-sectional area of ​​the first adjusting portion (60) gradually decreases, so as to adjust the peripheral area of ​​the second adjusting portion (47) by controlling the insertion depth of the first adjusting portion (60); wherein the cross-sectional area of ​​the first adjusting portion (60) is the area of ​​the cross section of the first adjusting portion (60) perpendicular to the extension direction of the first adjusting portion (60).

5. The hip joint prosthesis according to claim 3 or 4, characterized in that: At least part of the outer peripheral wall of the first adjusting portion (60) is provided with an external thread, and the inner peripheral wall of the positioning hole (472) is provided with an internal thread adapted to the external thread, and the first adjusting portion (60) and the second adjusting portion (47) are screwed together by the mutual cooperation of the external thread and the internal thread.

6. The hip joint prosthesis according to claim 5, characterized in that The first regulating part (60) comprises: An operating portion (61), wherein the operating portion (61) is provided with a mounting groove (63); A connecting portion (62), the operating portion (61) is provided on the connecting portion (62), and at least a portion of the outer peripheral wall of the connecting portion (62) is provided with the external thread.

7. The hip joint prosthesis according to claim 1, characterized in that The second adjustment portion (47) includes a plurality of adjustment notches (473), which are arranged at intervals around the circumference of the second adjustment portion (47), each of the adjustment notches (473) is connected to the positioning hole (472), and the telescopic portion (474) is formed between two adjacent adjustment notches (473).

8. The hip joint prosthesis according to claim 1, characterized in that The extension handle (50) comprises an extension handle body (51) and an inserting portion (52), wherein the inserting portion (52) is arranged on the extension handle (50), and the first adjusting portion (60) has an inserting hole (64) adapted to the inserting portion (52), so that the extension handle (50) and the first adjusting portion (60) are detachably connected by inserting at least a portion of the inserting portion (52) into the inserting hole (64).

9. The hip joint prosthesis according to claim 8, characterized in that The plug-in portion (52) is a columnar structure, and the cross-sectional area of ​​the plug-in portion (52) gradually decreases from the insertion direction of the plug-in portion (52); wherein the cross-sectional area of ​​the plug-in portion (52) is the area of ​​the cross section of the plug-in portion (52) perpendicular to the extension direction of the plug-in portion (52).

10. The hip joint prosthesis according to claim 8, characterized in that The extension handle body (51) is provided with an anti-rotation ridge structure, and the anti-rotation ridge structure includes a plurality of ridge-like protrusions (511). The plurality of ridge-like protrusions (511) are arranged at intervals around the circumference of the extension handle body (51), and each of the ridge-like protrusions (511) is arranged along the extension direction of the extension handle body (51).

11. The hip joint prosthesis according to claim 8, characterized in that A tuning fork structure (512) is provided on the extension handle body (51), and the tuning fork structure (512) includes a plurality of elastic openings (513). The plurality of elastic openings (513) are arranged at intervals around the circumference of the extension handle body (51), and each of the elastic openings (513) is arranged along the extension direction of the extension handle body (51).

12. The hip joint prosthesis according to claim 1, characterized in that The filling piece (40) further includes: A filling block (45), wherein the filling channel (43) is provided on the filling block (45), and the second adjusting portion (47) is provided on the filling block (45); the filling block (45) comprises a filling portion (451) and a cutting portion (452) that are arranged opposite to each other; wherein the filling portion (451) is used to fill a hip joint bone defect of a patient.

13. The hip joint prosthesis according to claim 2, characterized in that The proximal portion of the femoral stem (10) further comprises: A femoral platform (11), the femoral platform (11) being arranged on the femoral column (13); A femoral stem body (14), the femoral stem body (14) being arranged on the femoral platform (11), and the femoral stem body (14) and the femoral platform (11) being arranged at a predetermined angle; Wherein, a femoral neck (12) is provided at one end of the femoral stem body (14) close to the femoral platform (11).

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