CN110840627A

CN110840627A - Hip joint prosthesis

Info

Publication number: CN110840627A
Application number: CN201911215697.3A
Authority: CN
Inventors: 刘敏
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-02-28

Abstract

The invention provides a hip joint prosthesis, which comprises a proximal end part of a femoral stem, an extension stem and a filling component, wherein the filling component is arranged between the proximal end part of the femoral stem and the extension stem so as to connect the proximal end part of the femoral stem and the extension 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 extension handle, and the filling piece is used for being connected with the proximal end part of the femoral handle; the filling piece comprises a second adjusting part, the second adjusting part is provided with a telescopic part, and the telescopic part is movably arranged so as to increase the area of the outer peripheral surface of the second adjusting part by pushing the telescopic part to move, so that the outer peripheral surface of the second adjusting part can be in fit contact with the bone defect part of the corresponding hip joint, and the effect that the second adjusting part is well matched with the bone defect part of the corresponding hip joint is achieved; therefore, the hip joint prosthesis can meet different hip joint bone defect conditions and has good universality.

Description

Hip joint prosthesis

Technical Field

The invention relates to the field of medical treatment, in particular to a hip joint prosthesis.

Background

In the case of total hip revision, the prosthesis to be initially replaced and the diseased bone are removed during revision, which results in bone defects of a certain degree, and the position and degree of the bone defects vary from person to person.

When the problem of bone defects of the total hip joint is solved, a hip joint prosthesis is usually needed, the structure of a filling component of the conventional hip joint prosthesis is fixed and has poor flexibility, and the filling component cannot be properly adjusted according to different bone defect positions and defect degrees so as to be well filled. Although it is possible to tailor a hip prosthesis to a patient to better match the filler component to the bone defect of each patient to meet the needs of each patient, the customization of a hip prosthesis is long, expensive, and the customized hip prosthesis is not versatile.

Disclosure of Invention

The invention mainly aims to provide a hip joint prosthesis, which aims to solve the problem that the hip joint prosthesis in the prior art has no universality.

In order to achieve the above object, the present invention provides a hip joint prosthesis including a proximal end portion of a femoral stem, an extension stem, and a filling member disposed between the proximal end portion of the femoral stem and the extension stem to connect the proximal end portion of the femoral stem and the extension 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 extension handle, and the filling piece is used for being connected with the proximal end part of the femoral handle; the packing member includes a second regulating portion having a telescopic portion movably provided to increase an area of an outer circumferential surface of the second regulating portion by pushing the telescopic portion to move.

Further, the hip joint prosthesis further comprises a connecting sleeve, the connecting sleeve is used for being connected with the proximal end part of the femoral stem, the filling piece is provided with a filling channel, and the connecting sleeve is rotatably inserted into the filling channel so that the connecting sleeve drives the proximal end part of the femoral stem to rotate relative to the filling piece.

Furthermore, the proximal end part of the femoral stem comprises a femoral column, a sleeve cavity of the connecting sleeve is matched with the femoral column, and the femoral column is inserted into the sleeve cavity; along the direction of establishing of inserting of femoral post, the cross-sectional area of femoral post reduces gradually, and wherein, the cross-sectional area of femoral post is the area of the cross-section of femoral post perpendicular to the extending direction of femoral post.

Furthermore, the second adjusting portion is provided with a plurality of positioning holes, the telescopic portions are arranged around the positioning holes, the first adjusting portion is inserted into the positioning holes and matched with the positioning holes through the first adjusting portion, so that the telescopic portions are maintained at the initial position or pushed to move outwards, and the area of the outer peripheral surface of the second adjusting portion is adjusted.

Furthermore, the first adjusting part has multiple specifications, the areas of the outer peripheral surfaces of the first adjusting parts with the multiple specifications are different, and the telescopic part can be selectively maintained at the initial position or moved outwards by selecting the first adjusting part with the corresponding specification and inserting the first adjusting part into the positioning hole.

Further, the cross-sectional area of the first regulation part is gradually reduced along the insertion direction of the first regulation part to regulate the peripheral area of the second regulation part by controlling the insertion depth of the first regulation part; the cross-sectional area of the first adjusting part is the area of the cross section of the first adjusting part perpendicular to the extending direction of the first adjusting part.

Further, at least partial periphery wall of first regulation portion is provided with the external screw thread, and the internal perisporium of locating hole is provided with the internal thread with external screw thread looks adaptation, makes first regulation portion and second regulation portion spiro union through mutually supporting of external screw thread and internal thread.

Further, the first regulating portion includes: the operating part is provided with an assembling groove; the connecting part, the operation portion sets up on the connecting part, and at least partial periphery wall of connecting part is provided with the external screw thread.

Further, the second adjustment portion includes a plurality of regulation breachs, and a plurality of regulation breachs wind the circumference interval setting of second adjustment portion, and each regulation breach all communicates with the locating hole, forms the pars contractilis between two adjacent regulation breachs.

Further, the extension handle includes extension handle body and grafting portion, and the grafting portion sets up on the extension handle, and first regulating part has the spliced eye with grafting looks adaptation to at least part through the grafting portion is inserted and is located in the spliced eye, makes extension handle and first regulating part detachably be connected.

Furthermore, the plug part is of a columnar structure, and the cross section area of the plug part is gradually reduced from the plug direction of the plug part; the cross-sectional area of the insertion part is the area of the cross section of the insertion part, which is perpendicular to the extending direction of the insertion part.

Further, be provided with on the extension handle body and prevent revolving the spine structure, prevent revolving the spine structure and include that a plurality of ridge-shaped are protruding, a plurality of ridge-shaped are protruding to be set up around the circumference interval of extension handle body, and the extending direction setting of extension handle body is all followed to each ridge-shaped arch.

Further, be provided with the tuning fork structure on the extension handle body, the tuning fork structure includes a plurality of elasticity openings, and a plurality of elasticity openings set up around the circumference interval of extension handle body, and each elasticity opening all sets up along the extending direction of extension handle body.

Furthermore, the filling channel is arranged on the filling block, and the second adjusting part is arranged on the filling block; the filling block comprises a filling part and a cutting part which are oppositely arranged; wherein, the filling part is used for filling the hip joint bone defect of the patient.

Further, the proximal end portion of the femoral stem further comprises: the femur platform is arranged on the femur column; the femoral stem body part is arranged on the femoral platform, and a preset angle is formed between the femoral stem body part and the femoral platform; wherein, the femoral shaft body part is provided with a femoral neck cutter at one end close to the femoral platform.

By applying the technical scheme of the invention, the hip joint prosthesis comprises a proximal end part of the femoral stem, an extension stem and a filling component, wherein the filling component is arranged between the proximal end part of the femoral stem and the extension stem so as to connect the proximal end part of the femoral stem and the extension 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 extension handle, and the filling piece is used for being connected with the proximal end part of the femoral handle; the filling piece comprises a second adjusting part, the second adjusting part is provided with a telescopic part, and the telescopic part is movably arranged so as to increase the area of the outer peripheral surface of the second adjusting part by pushing the telescopic part to move, so that the outer peripheral surface of the second adjusting part can be in fit contact with the bone defect part of the corresponding hip joint, and the effect that the second adjusting part is well matched with the bone defect part of the corresponding hip joint is achieved, namely the filling assembly of the hip joint prosthesis can be well adapted to the bone defect situation of the corresponding hip joint; therefore, the hip joint prosthesis can meet different hip joint bone defect conditions by adjusting the area of the outer peripheral surface of the second adjusting part, so that the hip joint prosthesis has good universality, and the problem that the hip joint prosthesis in the prior art has no universality is solved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

figure 1 shows an exploded view of a hip prosthesis according to an embodiment of the hip prosthesis according to the invention;

FIG. 2 shows an assembled internal cross-sectional block diagram of the hip prosthesis of FIG. 1;

FIG. 3 shows an external schematic view of a first adjustment part of the hip prosthesis according to FIG. 1;

FIG. 4 shows a cross-sectional internal view of the first adjustment part of the hip joint prosthesis in FIG. 3;

FIG. 5 shows a schematic external view of the filler of the hip prosthesis of FIG. 1;

FIG. 6 shows a cross-sectional internal view of the filler of the hip prosthesis of FIG. 5;

fig. 7 shows a schematic view of the proximal part of the femoral stem of the hip prosthesis in fig. 1;

FIG. 8 shows a schematic view of the structure of the elongate stem of the hip prosthesis in FIG. 1

FIG. 9 shows a bottom view of the elongate stem of the hip prosthesis in FIG. 8; and

fig. 10 shows a sectional internal view of the connection sleeve of the hip joint prosthesis according to fig. 1.

Wherein the figures include the following reference numerals:

10. a femoral stem proximal portion; 11. a femoral platform; 12. femoral neck cutting; 13. a femoral post; 14. a femoral stem body portion; 40. a filling member; 43. filling the channel; 45. filling blocks; 451. a filling section; 452. a cutting part; 47. a second regulating part; 472. positioning holes; 473. adjusting the gap; 474. a telescopic part; 50. a handle is extended; 51. an extension handle body; 511. a ridge-like protrusion; 512. a tuning fork structure; 513. an elastic opening; 52. a plug-in part; 60. a first adjusting section; 61. an operation section; 62. a connecting portion; 63. assembling a groove; 64. inserting holes; 70. a connecting sleeve; 72. a sleeve lumen; 80. a hip prosthesis.

Detailed Description

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

The present invention provides a hip joint prosthesis 80, please refer to fig. 1 to 10, the hip joint prosthesis 80 comprises a proximal femoral stem portion 10, an extension stem 50 and a filling assembly, the filling assembly is disposed between the proximal femoral stem portion 10 and the extension stem 50 to connect the proximal femoral stem portion 10 and the extension stem 50; wherein the filling assembly comprises a first adjusting part 60 and a filling member 40, the first adjusting part 60 and the filling member 40 are detachably connected, the first adjusting part 60 is used for connecting with the extension handle 50, and the filling member 40 is used for connecting with the proximal end part 10 of the femoral handle; the packing member 40 includes a second regulating part 47, and the second regulating part 47 has a telescopic part 474, and the telescopic part 474 is movably disposed to increase the area of the outer circumferential surface of the second regulating part 47 by pushing the telescopic part 474 to move.

In the hip joint prosthesis 80 of the present invention, the filling assembly of the hip joint prosthesis 80 comprises the first adjusting part 60 and the filling member 40, the filling member 40 comprises the second adjusting part 47, the second adjusting part 47 has the telescopic part 474, the telescopic part 474 is movably arranged so as to increase the area of the outer peripheral surface of the second adjusting part 47 by pushing the telescopic part 474 to move, so that the outer peripheral surface of the second adjusting part 47 can be in fit contact with the bone defect of the corresponding hip joint, and thus the effect that the second adjusting part 47 is well matched with the bone defect of the corresponding hip joint is achieved, i.e. the filling assembly of the hip joint prosthesis 80 can be well adapted to the bone defect condition of the corresponding hip joint; it can be seen that the hip joint prosthesis 80 can satisfy different hip joint bone defects by adjusting the area of the outer peripheral surface of the second adjustment portion 47, which enables the hip joint prosthesis 80 to have good versatility, thereby solving the problem that the hip joint prosthesis in the prior art has no versatility.

In order to achieve the assembly between the proximal femoral stem portion 10 and the filling member 40, as shown in fig. 2 and 10, the hip joint prosthesis further comprises a connecting sleeve 70, the connecting sleeve 70 is used for connecting with the proximal femoral stem portion 10, the filling member 40 is provided with a filling channel 43, and the connecting sleeve 70 is rotatably inserted into the filling channel 43, so that the connecting sleeve 70 drives the proximal femoral stem portion 10 to rotate relative to the filling member 40, and further the position of the proximal femoral stem portion 10 relative to the filling member 40 is changed.

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 pillar 13, the sleeve cavity 72 of the connecting sleeve 70 is matched with the femoral pillar 13, and the femoral pillar 13 is inserted into the sleeve cavity 72; the cross-sectional area of the femoral post 13 gradually decreases along the insertion direction of the femoral post 13, wherein the cross-sectional area of the femoral post 13 is the area of the cross section of the femoral post 13 perpendicular to the extending direction of the femoral post 13; this not only stabilizes the assembled structure of the femoral post 13 and the connecting sleeve 70, but also facilitates the insertion of the femoral post 13 into the sleeve channel 72. In the present embodiment, the "insertion direction of the femoral post 13" is a direction in which the femoral post 13 faces the connection sleeve 70.

Optionally, the top wall of the connecting sleeve 70 is flush with the top wall of the filling member 40, so that at least part of the bottom wall of the proximal femoral stem portion 10 can be in abutting contact with at least part of the top wall of the filling member 40, which is beneficial for enhancing the overall structural stability of the hip prosthesis 80 and also for making the structure of the hip prosthesis 80 more compact and regular.

Specifically, the second adjusting portion 47 has a positioning hole 472, a plurality of telescopic portions 474 are provided, the plurality of telescopic portions 474 are disposed around the positioning hole 472, the first adjusting portion 60 is inserted into the positioning hole 472, and the first adjusting portion 60 is engaged with the positioning hole 472, so that the telescopic portions 474 are maintained at an initial position or the telescopic portions 474 are pushed to move outward, thereby adjusting the area of the outer circumferential surface of the second adjusting portion 47. When the expansion part 474 is maintained at the initial position, the area of the outer peripheral surface of the second adjustment part 47 is the initial area, and when the expansion part 474 is pushed outward, the area of the outer peripheral surface of the second adjustment part 47 increases, and the outer peripheral surface of the second adjustment part 47 comes into contact with the bone defect of the corresponding hip joint more closely.

It should be noted that "pushing the telescopic part 474 out" mentioned above is to push the telescopic part 474 to move the telescopic part 474 in a direction away from the positioning hole 472.

Specifically, the first adjusting portion 60 has a plurality of specifications, the areas of the outer peripheral surfaces of the first adjusting portions 60 having the plurality of specifications are different from each other, and the expansion portion 474 can be selectively maintained at the initial position or moved outward by selecting the first adjusting portion 60 having the corresponding specification and inserting the first adjusting portion 60 into the positioning hole 472. Alternatively, the first regulating portion 60 has a standard size and a larger size, where the larger size refers to a size of such a size larger than the standard size; when the first adjusting part 60 of the standard specification is selected, the expansion part 474 is maintained at the initial position, and the area of the outer peripheral surface of the second adjusting part 47 is the initial area; when the first adjusting part 60 with a larger size is selected, after the first adjusting part 60 is inserted into the positioning hole 472, the first adjusting part 60 pushes the expanding part 474 to move outward. It can be seen that by selecting the 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 bone defects, and the hip prosthesis 80 has better versatility.

Optionally, the first adjusting portion 60 is a columnar structure, and the positioning hole 472 is a columnar hole; preferably, the first regulation part 60 is a substantially cylindrical structure having a standard diameter specification and a specification of a larger diameter, which means that its diameter is larger than the standard diameter.

Alternatively, the first regulation part 60 may be designed in a variable-size structure, specifically, the cross-sectional area of the first regulation part 60 is gradually reduced along the insertion direction of the first regulation part 60 to regulate the outer circumferential area of the second regulation part 47 by controlling the insertion depth of the first regulation part 60; the cross-sectional area of the first adjustment part 60 is the area of the cross-section of the first adjustment part 60 perpendicular to the extending direction of the first adjustment part 60. In a specific implementation process, the first adjusting part 60 is continuously and deeply inserted into the positioning hole 472, as the first adjusting part 60 is continuously and deeply inserted into the positioning hole 472, the first adjusting part 60 can continuously generate thrust on the telescopic part 474 and push the telescopic part 474 to continuously move outwards, and as the telescopic part 474 continuously moves outwards, the area of the outer peripheral surface of the second adjusting part 47 is gradually increased until the area of the outer peripheral surface of the second adjusting part 47 is in contact with the corresponding bone defect of the hip joint, and at this time, the second adjusting part 47 has a good matching effect with the corresponding bone defect of the hip joint, and the first adjusting part 60 is stopped being continuously operated. It can be seen that the first adjustment part 60 with the 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 as to adapt to different hip bone defects, and further provide better versatility to the hip prosthesis 80.

Specifically, as shown in fig. 3, at least a part of the outer circumferential wall of the first adjustment portion 60 is provided with an external thread, for example, the first adjustment portion 60 is a bolt; 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 by the mutual engagement of the external thread and the internal thread. In a specific implementation, the first adjustment portion 60 may be inserted into the positioning hole 472 by screwing the first adjustment portion 60 or the depth of the first adjustment portion 60 inserted into the positioning hole 472 may be controlled by screwing the first adjustment portion 60.

In a specific implementation process, the first adjusting portion 60 includes an operating portion 61 and a connecting portion 62; the operation part 61 is arranged on the connecting part 62, and at least part of the outer peripheral wall of the connecting part 62 is provided with an external thread; the operation portion 61 is provided with an assembly groove 63, and the first adjustment portion 60 can be operated by using an assembly tool and allowing the assembly tool to act on the assembly groove 63, so that the first adjustment portion 60 is inserted into the positioning hole 472. Optionally, the assembly groove 63 is a cross-shaped groove; the fitting groove 63 is provided in the ceiling wall of the operation portion 61, and the connecting portion 62 is provided in the bottom of the operation portion 61.

Specifically, as shown in fig. 5 and 6, the second adjusting portion 47 includes a plurality of adjusting notches 473, the plurality of adjusting notches 473 are arranged at intervals around the circumference of the second adjusting portion 47, each adjusting notch 473 is communicated with the positioning hole 472, and a telescopic portion 474 is formed between two adjacent adjusting notches 473, so that each telescopic portion 474 can be deformed under the thrust action of the first adjusting portion 60, and the portion of the second adjusting portion 47 surrounded by the plurality of telescopic portions 474 has an elastic action. Optionally, the adjustment notch 473 is a bar notch.

In order to achieve the assembly between the extension handle 50 and the first adjustment part 60 such that the extension handle 50 is connected with the filling member 40 through the first adjustment part 60, as shown in fig. 4 and 8, the extension handle 50 includes an extension handle body 51 and a plug part 52, and the plug part 52 is disposed on the extension handle 50; the first adjustment portion 60 has an insertion hole 64 adapted to the insertion portion 52, so that the extension handle 50 is detachably connected to the first adjustment portion 60 by inserting at least a portion of the insertion portion 52 into the insertion hole 64. Optionally, the plug portion 52 is disposed at the top of the extension handle body 51.

Specifically, the plugging portion 52 is a columnar structure, and the plugging hole 64 is a columnar hole; the cross-sectional area of the insertion portion 52 gradually decreases from the insertion direction of the insertion portion 52; the cross-sectional area of the socket 52 is the area of the cross-section of the socket 52 perpendicular to the extending direction of the socket 52. This not only makes the inserting portion 52 more stably inserted into the inserting hole 64, and further makes the structure of the assembly of the extension handle 50 and the first adjusting portion 60 more stable, but also makes the operation of inserting the inserting portion 52 into the inserting hole 64 more convenient. In the present embodiment, the "inserting direction of the inserting portion 52" is a direction in which the inserting portion 52 faces the first regulating portion 60.

Specifically, the extension handle body 51 is provided with a rotation-preventing ridge structure, the rotation-preventing ridge structure includes a plurality of ridge-like protrusions 511, and the ridge-like protrusions 511 are arranged around the extension handle body 51 at intervals in the circumferential direction; each ridge protrusion 511 is provided along the extending direction of the elongate shaft body 51. By providing the anti-rotation ridge structure on the extension stem body 51, the extension stem 50 can be prevented from rotating in the bone marrow cavity, and the stability of the hip prosthesis 80 implanted in the human body can be ensured.

Specifically, as shown in fig. 8 and 9, a tuning fork structure 512 is disposed on the extension stem body 51, the tuning fork structure 512 includes a plurality of elastic openings 513, the plurality of elastic openings 513 are disposed at intervals around the circumference of the extension stem body 51, and each elastic opening 513 is disposed along the extending direction of the extension stem body 51; optionally, the tuning fork structure 512 is disposed on the extension stem body 51 near the lower end thereof, which enables the lower end of the extension stem body 51 to deform slightly under an external force, i.e., the lower end of the extension stem body 51 has a certain degree of elasticity, which enables the extension stem body 51 to deform slightly according to the actual shape of the bone marrow cavity, so that the outer peripheral wall of the extension stem body 51 fits closely to the cavity wall of the bone marrow cavity, and the extension stem body 51 is accommodated in the bone marrow cavity more stably; it can be seen that the tuning fork structure 512 provided on the elongate stem body 51 enables the elongate stem body 51 to better accommodate different bone marrow cavities, which helps to improve the versatility of the elongate stem 50. In addition, the better adaptability matching between the extension handle body 51 and the 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 number of the elastic openings 513 is four, so that the tuning fork structure 512 forms a cross-shaped tuning fork.

Specifically, as shown in fig. 5 and 6, the filling member 40 further includes a filling block 45, the filling channel 43 is disposed on the filling block 45, and the second regulating portion 47 is disposed on the filling block 45; optionally, the filling channel 43 extends through the top wall of the filling block 45; the second adjusting part 47 is arranged at the bottom of the filling block 45, the second adjusting part 47 is of a columnar structure, and the telescopic part 474 is arranged at the bottom end of the second adjusting part 47; the filling channel 43 communicates with the positioning hole 472. The filling block 45 comprises a filling part 451 and a cutting part 452 which are oppositely arranged; the filling part 451 is used for filling the hip joint bone defect of the patient.

In order to ensure the overall structural strength of the filling member 40, the filling block 45 and the second adjusting portion 47 are integrally formed.

Specifically, as shown in fig. 7, the femoral stem proximal portion 10 further includes a femoral platform 11 and a femoral stem body portion 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 a preset angle is formed between the femoral stem body part 14 and the femoral platform 11; wherein, one end of the femoral stem body part 14 close to the femoral platform 11 is provided with a femoral neck cut 12. In the specific implementation process, the connecting sleeve 70 is rotated relative to the filling member 40, the connecting sleeve 70 drives the femur platform 11 and the femur handle body 14 to rotate synchronously through the femur column 13, wherein the position of the femur handle body 14 relative to the filling member 40 changes, which enables the femur handle body 14 to be connected with the corresponding femur in the human body by rotating the connecting sleeve 70 according to the actual requirement when the position of the filling member 40 does not change, that is, the relative position between the filling portion 451 of the filling member 40 and the corresponding bone defect is not changed, and enables the femur handle body 14 to achieve a better matching effect with the corresponding femur in the human body. Optionally, the femoral platform 11 is disposed on the upper portion of the femoral post 13, and the femoral stem body portion 14 is disposed on the upper portion of the femoral platform 11; when the femoral post 13 is inserted into the filling channel 43, at least a portion of the bottom wall of the femoral platform 11 is in abutting contact with at least a portion of the top wall of the filling block 45 to make the overall structure of the hip joint prosthesis 80 more stable, compact and orderly.

Optionally, the femoral stem body portion 14 is a cylindrical structure, and preferably, the femoral stem body portion 14 is a cylindrical structure, and the diameter of the femoral stem body portion 14 gradually decreases from the femoral stem body portion 14 away from the femoral platform 11. The femoral neck cut 12 is formed by at least partially inwardly recessing the peripheral wall of the femoral stem body portion 14 at the end adjacent to the femoral platform 11 to form a substantially neck cut planar structure; in the specific operation process, at least part of the corresponding position of the femoral stem body part 14 is cut off along the circumferential direction of the femoral stem body part 14 to form a roughly neck-cut plane structure; this makes it possible to prevent the end of the femoral stem body 14 close to the femoral platform 11 from touching the acetabulum of the human body when the hip joint system in the human body moves after the hip joint prosthesis 80 is implanted in the human body, thereby ensuring the movement effect of the entire hip joint system.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

in the hip joint prosthesis 80 of the present invention, the hip joint prosthesis 80 includes a femoral stem proximal end portion 10, an extension stem 50, and a filling member provided between the femoral stem proximal end portion 10 and the extension stem 50 to connect the femoral stem proximal end portion 10 and the extension stem 50; wherein the filling assembly comprises a first adjusting part 60 and a filling member 40, the first adjusting part 60 and the filling member 40 are detachably connected, the first adjusting part 60 is used for connecting with the extension handle 50, and the filling member 40 is used for connecting with the proximal end part 10 of the femoral handle; the filling member 40 comprises a second adjusting part 47, the second adjusting part 47 is provided with a telescopic part 474, and the telescopic part 474 is movably arranged so as to increase the area of the outer peripheral surface of the second adjusting part 47 by pushing the telescopic part 474 to move, so that the outer peripheral surface of the second adjusting part 47 can be in fit contact with the bone defect of the corresponding hip joint, and therefore, the effect that the second adjusting part 47 is well matched with the bone defect of the corresponding hip joint is achieved, namely, the filling component of the hip joint prosthesis 80 can be well adapted to the bone defect situation of the corresponding hip joint; it can be seen that the hip joint prosthesis 80 can satisfy different hip joint bone defects by adjusting the area of the outer peripheral surface of the second adjustment portion 47, which enables the hip joint prosthesis 80 to have good versatility, thereby solving the problem that the hip joint prosthesis in the prior art has no versatility.

In addition, in the hip joint prosthesis 80, the proximal femoral stem portion 10 and the filling member 40, the first adjusting portion 60 and the filling member 40, and the first adjusting portion 60 and the extension stem 50 are detachably connected, that is, the hip joint prosthesis 80 is assembled by the proximal femoral stem portion 10, the filling member 40, the first adjusting portion 60 and the extension stem 50, and in the actual application process, the most suitable specifications of the above components can be selected according to the situation of the actual bone defect to assemble the hip joint prosthesis 80 with the most adaptability; and the disassembly and connection of the components also facilitate the assembly and disassembly of the hip joint prosthesis 80, which is beneficial to increasing the convenience of the operation of implanting the hip joint prosthesis 80.

In addition, the hip joint prosthesis 80 structure provided by the present invention avoids opening a connection hole in the proximal femoral stem portion 10 to connect the proximal femoral stem portion 10 to the extension stem 50 through the connection hole, which helps to reinforce the overall structural strength of the proximal femoral stem portion 10, thereby ensuring the overall structural strength of the hip joint prosthesis 80.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hip prosthesis, comprising:

a femoral stem proximal portion (10);

an elongate handle (50);

a filling assembly disposed between the femoral stem proximal end portion (10) and the elongate stem (50) to connect the femoral stem proximal end portion (10) and the elongate 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 for being connected with the extension handle (50), and the filling piece (40) is used for being connected with the proximal end part (10) of the femoral handle;

the filling member (40) includes a second regulating portion (47), the second regulating portion (47) having a telescopic portion (474), the telescopic portion (474) being movably disposed to increase an area of an outer circumferential surface of the second regulating portion (47) by pushing the telescopic portion (474) to move.

2. The hip joint prosthesis according to claim 1, further comprising:

a connecting sleeve (70), the connecting sleeve (70) is used for connecting with the proximal end part (10) of the femoral stem, the filling member (40) is provided with a filling channel (43), the connecting sleeve (70) is rotatably inserted in the filling channel (43), so that the connecting sleeve (70) drives the proximal end part (10) of the femoral stem to rotate relative to the filling member (40).

3. The hip joint prosthesis according to claim 2, characterized in that the proximal femoral stem portion (10) comprises a femoral post (13), the sleeve channel (72) of the connection sleeve (70) being adapted to the femoral post (13), the femoral post (13) being inserted in the sleeve channel (72);

along the inserting direction of the femoral column (13), the cross-sectional area of the femoral column (13) is gradually reduced, 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 extending direction of the femoral column (13).

4. The hip joint prosthesis according to claim 1, wherein the second adjustment part (47) has a positioning hole (472), the number of the telescopic parts (474) is plural, a plurality of the telescopic parts (474) are arranged around the positioning hole (472), the first adjustment part (60) is inserted into the positioning hole (472), and the area of the outer circumferential surface of the second adjustment part (47) is adjusted by the first adjustment part (60) being fitted into the positioning hole (472) to maintain the telescopic part (474) at an initial position or to push the telescopic part (474) outward.

5. The hip joint prosthesis according to claim 4, wherein the first adjustment part (60) has a plurality of sizes, and the first adjustment part (60) has a plurality of sizes having different areas on the outer circumferential surface thereof, and the expansion part (474) is selectively maintained at an initial position or moved outward by selecting the first adjustment part (60) having the corresponding size and inserting the first adjustment part (60) into the positioning hole (472).

6. The hip joint prosthesis according to claim 4, wherein a cross-sectional area of the first regulation part (60) is gradually reduced in an insertion direction of the first regulation part (60) to regulate a peripheral area of the second regulation part (47) by controlling an insertion depth of the first regulation part (60); wherein the cross-sectional area of the first adjustment part (60) is the area of a cross-section of the first adjustment part (60) perpendicular to the direction of extension of the first adjustment part (60).

7. The hip joint prosthesis according to claim 5 or 6, characterized in that at least a part of the outer circumferential wall of the first adjustment part (60) is provided with an external thread, the inner circumferential wall of the positioning hole (472) is provided with an internal thread adapted to the external thread, and the first adjustment part (60) and the second adjustment part (47) are threadedly engaged by the mutual engagement of the external thread and the internal thread.

8. The hip joint prosthesis according to claim 7, characterized in that said first adjustment portion (60) comprises:

an operation part (61), wherein the operation part (61) is provided with an assembling groove (63);

a connecting portion (62), wherein the operating portion (61) is arranged on the connecting portion (62), and at least part of the outer peripheral wall of the connecting portion (62) is provided with the external thread.

9. The hip joint prosthesis according to claim 4, characterized in that the second adjustment portion (47) comprises a plurality of adjustment notches (473), the plurality of adjustment notches (473) being provided at intervals around the circumference of the second adjustment portion (47), each of the adjustment notches (473) communicating with the positioning hole (472), the expansion portion (474) being formed between two adjacent adjustment notches (473).

10. The hip joint prosthesis according to claim 1, wherein the extension stem (50) comprises an extension stem body (51) and an insertion part (52), the insertion part (52) being provided on the extension stem (50), the first adjustment part (60) having an insertion hole (64) adapted to the insertion part (52) to detachably connect the extension stem (50) with the first adjustment part (60) by at least a portion of the insertion part (52) being inserted in the insertion hole (64).

11. The hip joint prosthesis according to claim 10, wherein the insertion part (52) is a cylindrical structure, and the cross-sectional area of the insertion part (52) is gradually reduced from the insertion direction of the insertion part (52); the cross-sectional area of the insertion part (52) is the area of the cross section of the insertion part (52) perpendicular to the extending direction of the insertion part (52).

12. The hip joint prosthesis according to claim 10, wherein the extension stem body (51) is provided with a rotation prevention ridge structure, the rotation prevention ridge structure comprising a plurality of ridge-like protrusions (511), the plurality of ridge-like protrusions (511) being provided at intervals around a circumferential direction of the extension stem body (51), each ridge-like protrusion (511) being provided along an extending direction of the extension stem body (51).

13. The hip prosthesis according to claim 10, wherein a tuning fork structure (512) is provided on the elongate stem body (51), the tuning fork structure (512) comprising a plurality of elastic openings (513), the plurality of elastic openings (513) being provided at intervals around a circumference of the elongate stem body (51), each of the elastic openings (513) being provided along an extension direction of the elongate stem body (51).

14. The hip joint prosthesis according to claim 2, characterized in that said filler (40) further comprises:

a filling block (45), the filling channel (43) being arranged on the filling block (45), the second adjustment portion (47) being arranged on the filling block (45); the filling block (45) comprises a filling part (451) and a cutting part (452) which are oppositely arranged; wherein the filling part (451) is used for filling the hip joint bone defect of the patient.

15. The hip joint prosthesis according to claim 3, characterized in that said proximal femoral stem portion (10) further comprises:

a femoral platform (11), the femoral platform (11) disposed on the femoral post (13);

the femoral stem body part (14), the femoral stem body part (14) is arranged on the femoral platform (11), and a preset angle is formed between the femoral stem body part (14) and the femoral platform (11);

wherein, one end of the femoral stem body part (14) close to the femoral platform (11) is provided with a femoral neck cutter (12).