Femoral head support device

Abstract

The present invention discloses a femoral head support device, comprising: a support body, a locking column and at least one locking piece; the support body is a mesh column structure with one end open; the locking column has one end fixedly connected to one end of the support body; the locking piece is arranged on the locking column, can slide on the locking column under the action of external force, and part of the locking piece can pass through the locking column. After the support body of the present invention is implanted in the femoral head, the locking piece moves on the locking column under the action of external force, and the locking piece passes through the locking column and cuts into the bone of the femoral head and neck, thereby achieving fixation at the femoral head and neck. The support body does not need to span the femoral trochanteric area, which can avoid affecting the later joint replacement surgery.

Description

Technical Field

[0001] The invention belongs to the field of medical devices, and in particular relates to a femoral head supporting device. Background Art

[0002] At present, most of the porous metal femoral head support rods used in clinical practice are long rods. In order to meet the needs of people of different heights, their design length is 70mm to 130mm. However, no matter what length of this type of support rod is used, it needs to be fixed at the base or outside of the greater trochanter after implantation, which requires the support rod to extend from the femoral head across the femoral trochanter and to the base of the greater trochanter. Due to the complexity of the treatment of femoral head necrosis, even with the above-mentioned support rod treatment, some necrotic femoral heads will progress to terminal necrosis and total hip replacement will have to be performed. The operation requires the removal of the necrotic femoral head from the femoral trochanter, and the porous metal support rod implanted across the femoral trochanter is difficult to remove due to local bone fusion, which will cause great difficulties in osteotomy and easily cause local fractures, resulting in an increased risk of surgical failure. Summary of the invention

[0003] In order to solve the above problems existing in the prior art, the present invention provides a femoral head support device that does not need to cross the femoral trochanter. The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0004] A femoral head support device comprises: a support body, a locking column and at least one locking member;

[0005] The support body is a mesh column structure with one end open;

[0006] The locking column has one end fixedly connected to one end of the supporting body;

[0007] The locking piece is arranged on the locking column and can slide on the locking column under the action of external force, and part of the locking piece can pass through the locking column.

[0008] In one embodiment of the present invention, the locking column has a receiving groove on the other end;

[0009] The receiving groove has at least one access hole on its side wall;

[0010] The locking piece is placed in the receiving groove and close to the access hole. It can slide in the receiving groove under the action of external force, and part of the locking piece can pass through the access hole.

[0011] In one embodiment of the present invention, the locking member comprises a locking block and a limiting block;

[0012] The locking block is placed in the receiving groove and has a locking inclined surface;

[0013] The locking bevel faces the outside of the access hole and can pass through the access hole;

[0014] The limit block is located on the side wall of the locking block adjacent to the locking bevel, and is located close to the edge of the locking block opposite to the edge of the locking bevel. The side wall of the limit block facing the inner wall of the accommodating groove is parallel to the inner wall of the accommodating groove, and the limit block protrudes toward the side of the entry and exit through hole.

[0015] In one embodiment of the present invention, the number of the locking members includes two, the number of the access through holes includes two, and the two access through holes are arranged opposite to each other.

[0016] In one embodiment of the present invention, the limit block comprises: two first sub-limit blocks;

[0017] The two first sub-limiting blocks are located on both sides of the locking inclined surface and in an axial direction parallel to the short axis of the support body.

[0018] In one embodiment of the present invention, the limit block further includes: a second sub-limit block;

[0019] The second sub-limiting block is fixedly connected to the surface of the locking block facing away from the bottom of the accommodating groove.

[0020] In one embodiment of the present invention, the locking member further comprises: a stopper;

[0021] The stop block is opposite to the second sub-limit block, fixedly connected to the locking block, and is located near the edge of the locking block opposite to the edge of the locking slope. The side wall of the stop block facing the inner wall of the accommodating groove is parallel to the inner wall of the accommodating groove.

[0022] In one embodiment of the present invention, a locking tail cap is further included; the locking tail cap includes: a push column and a screw rod;

[0023] The surface of the locking block facing away from the access hole is a push-out inclined surface inclined from the bottom of the accommodating groove toward the locking inclined surface.

[0024] The push column has one end fixedly connected to one end of the screw rod, and a portion close to the other end of the push column contacts the surfaces of the two locking blocks facing away from the access holes; the cross section of the push column along the minor axis direction of the support body is circular;

[0025] The receiving groove has a screw hole on the bottom of the groove;

[0026] The screw hole is threadably connected to the screw rod.

[0027] In one embodiment of the present invention, the push column comprises: a push platform;

[0028] The push table is a truncated cone structure, one end with the smallest diameter is fixedly connected to the screw rod, and the other end is in contact with the push-out inclined surfaces of the two locking blocks.

[0029] In one embodiment of the present invention, it further comprises an implant rod;

[0030] The implant rod has a clamping portion fixedly disposed at one end;

[0031] The receiving groove has a clamping portion on its wall;

[0032] The clamping portion is detachably connected to the clamping portion.

[0033] Beneficial effects of the present invention:

[0034] After the support body of the present invention is implanted in the femoral head, the support body does not need to span the femoral trochanteric area, and the locking piece moves on the locking column under the action of an external force, and the locking piece passes through the locking column and cuts into the bone around the support body, thereby achieving the effect of fixing the support body at the femoral head and neck, and can avoid loosening and displacement of the support body. The device realizes fixation at the femoral head and neck, and the support body does not need to span the femoral trochanteric area, which can avoid affecting the later joint replacement surgery. At the same time, the device can be implanted and fixed under minimally invasive surgery, which can greatly reduce patient trauma and surgical risks, and accelerate patient recovery.

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a structural schematic diagram of a femoral head support device provided by an embodiment of the present invention;

[0037] Figure 2 is a schematic diagram of the structure of the locking and supporting body provided by an embodiment of the present invention;

[0038] Figure 3 It is a schematic structural diagram of a locking housing, a locking member and a supporting body provided by an embodiment of the present invention;

[0039] Figure 4 It is a schematic structural diagram of a locking housing, a locking member and a supporting body provided by an embodiment of the present invention;

[0040] Figure 5 is a schematic structural diagram of a locking member provided by an embodiment of the present invention;

[0041] Figure 6 is a schematic structural diagram of a locking member provided by an embodiment of the present invention;

[0042] Figure 7 is a schematic structural diagram of a locking member provided by an embodiment of the present invention;

[0043] Figure 8 is a structural schematic diagram of a femoral head support device provided by an embodiment of the present invention;

[0044] Fig. 9 is a schematic structural diagram of a locking member provided by an embodiment of the present invention;

[0045] Fig.10 is a cross-sectional view of a femoral head support device provided by an embodiment of the present invention;

[0046] Fig.11 is a cross-sectional view of the locking member provided by the embodiment of the present invention without entering the bone;

[0047] Fig.12 is a schematic structural diagram of a push column provided by an embodiment of the present invention;

[0048] Fig.13 is a schematic structural diagram of a push column provided by an embodiment of the present invention;

[0049] Fig.14 is a cross-sectional view of a locking member provided by an embodiment of the present invention entering into bone;

[0050] Fig.15 is a cross-sectional view of a femoral head support device provided by an embodiment of the present invention;

[0051] Fig.16 is a schematic structural diagram of a push column provided by an embodiment of the present invention;

[0052] Fig.17 is a schematic structural diagram of a push column provided by an embodiment of the present invention;

[0053] Fig.18 is a cross-sectional view of the locking member provided by the embodiment of the present invention without entering the bone;

[0054] Fig.19 is a cross-sectional view of a locking member provided by an embodiment of the present invention entering into bone;

[0055] Fig. 20 is a structural schematic diagram of a femoral head support device provided by an embodiment of the present invention;

[0056] Fig.21 is a schematic structural diagram of an implant rod provided by an embodiment of the present invention;

[0057] Fig. 22 is a structural schematic diagram of a femoral head support device provided by an embodiment of the present invention;

[0058] Fig.23is a structural schematic diagram of a locking column provided by an embodiment of the present invention;

[0059] Fig.24 It is a schematic structural diagram of another locking column provided in an embodiment of the present invention.

[0060] Description of reference numerals:

[0061] 10-support body; 20-locking column; 21-accommodating groove; 22-entry and exit through hole; 23-screw hole; 24-clamping part; 25-guide through hole; 26-bayonet; 30-locking piece; 31-locking block; 311-locking slope; 312-push-out slope; 32-limiting block; 33-first sub-limiting block; 34-second sub-limiting block; 35-stop block; 40-push column; 41-screw; 42-locking hole; 43-push platform; 44-connecting column; 50-extension column; 51-threaded hole; 60-implant rod; 61-clamping part; 62-hook. DETAILED DESCRIPTION

[0062] The present invention is further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.

[0063] Embodiment 1

[0064] See also Figure 1 A femoral head support device comprises: a support body 10, a locking column 20 and at least one locking piece 30. The support body 10 is a mesh column structure with an open end. In the present embodiment, it can be understood that the support body 10 is cylindrical, with an open bottom and a hemispherical top, and the entire support body 10 is a hollow mesh structure. One end of the locking column 20 is fixedly connected to one end of the support body 10. It can be understood that the locking column 20 is located at the opening of the support body 10. The locking piece 30 is arranged on the locking column 20, and the locking piece 30 can slide on the locking column 20 under the action of an external force, and part of the locking piece 30 can pass through the locking column 20.

[0065] In this embodiment, the support body 10 can be implanted into the femoral head through an auxiliary implantation device, and the support body 10 does not need to span the femoral trochanteric part. After implantation, a thrust is applied to the locking member 30, and part of the locking member 30 can move out of the locking column 20. Therefore, the part of the locking member 30 that penetrates can cut into the bone around the locking member 30, thereby further fixing the support body 10 and the locking column 20 at the femoral head and neck. In this embodiment, the loosening and displacement of the support body 10 can be avoided, so the support effect of the support body 10 on the necrotic femoral head subchondral bone is improved, and the bone ingrowth effect is better. In this embodiment, the femoral head support device is fixed at the femoral head and neck, and the length of the support body 10 is less than the sum of the length of the femoral head and the length of the femoral neck. The support body 10 will not span the femoral trochanteric part, which can avoid affecting the later joint replacement surgery. At the same time, the device can be implanted and fixed under minimally invasive surgery, which can greatly reduce patient trauma and surgical risks and accelerate patient recovery.

[0066] It should be noted that in the prior art, after the implantation of the support rod, the patient still faces the risk of femoral head collapse. After the femoral head collapses, total hip replacement is required, and this surgery faces the problem of intraoperative intertrochanteric osteotomy. Because the existing support rods are relatively long (70mm to 130mm) and span the femoral trochanteric area, it is difficult to remove the residual rod during the osteotomy process. During the removal process, problems such as femoral neck base and intertrochanteric bone defects and fractures may be encountered. The above problems may affect the stability of the femoral stem prosthesis in the later stage and even increase the risk of infection around the prosthesis.

[0067] In a feasible implementation, the length of the support body 10 is 20mm to 80mm, and the diameter is 8mm to 12mm. The support body 10 can meet the needs of patients of different heights. At the same time, the length of the support body 10 is relatively short and is fixed at the femoral head and neck by a locking piece 30. The support body 10 does not cross the femoral trochanteric area, effectively avoiding the base of the femoral neck and the intertrochanteric area. During later total hip replacement and intertrochanteric osteotomy, it can not only be completely removed along with the femoral neck, but also no components of the support body 10 will remain, which brings convenience to later total hip replacement and reduces the risks of complications such as prosthesis loosening and peri-prosthesis infection.

[0068] In a feasible implementation, the locking piece 30 may have a sharp portion structure, and the sharp portion structure can cut into the bone of the femoral head and neck. The femoral head support device can be prepared by 3D printing technology, which can specifically include selective laser melting technology or electron beam melting technology. The material of the support body 10, the locking column 20 and the locking piece 30 includes titanium alloy or tantalum metal. Among them, the support body 10 and the locking column 20 are integrally formed.

[0069] Embodiment 2

[0070] like Figure 2 and Figure 3 As shown, this embodiment is based on the first embodiment and further defines that a receiving groove 21 is provided on the other end of the locking column 20. At least one access hole 22 is provided on the side wall of the receiving groove 21. The locking member 30 is placed in the receiving groove 21, and the locking member 30 is close to the access hole 22. The locking member 30 can slide in the receiving groove 21 under the action of external force, and part of the locking member 30 can pass through the access hole 22. In this embodiment, part of the locking member 30 can pass through the access hole 22 and is located outside the locking column 20, and the rest of the locking member 30 is located in the receiving groove 21 and can be limited in the receiving groove 21. Among them, the number of the access holes 22 is the same as that of the locking member 30.

[0071] Furthermore, if Figure 4 , Figure 5 and Figure 6 As shown, the locking member 30 includes a locking block 31 and a limiting block 32. The locking block 31 is placed in the receiving groove 21, and the locking block 31 has a locking bevel 311. In the present embodiment, the locking block 31 is in sliding contact with the bottom of the receiving groove 21. The locking bevel 311 faces the outside of the access hole 22, and the locking member 30 is subjected to an external force to make the locking bevel 311 pass through the access hole 22. In the present embodiment, since the locking bevel 311 is an inclined surface, the locking bevel 311 is gradually inclined outward from the bottom of the receiving groove 21 to the notch extending direction, or is gradually inclined outward from the notch of the receiving groove 21 to the bottom of the groove, therefore, the locking bevel 311 will form an acute corner portion, so that the corner portion can cut into the bone of the femoral head and neck.

[0072] In this embodiment, the limit block 32 is located on the side wall of the locking block 31 adjacent to the locking inclined surface 311, and the limit block 32 protrudes toward the outside of the locking block 31. The limit block 32 is located near the edge of the locking block 31 opposite to the edge of the locking inclined surface 311, and the side wall of the limit block 32 facing the inner wall of the receiving groove 21 is parallel to the inner wall of the receiving groove 21, and the limit block 32 protrudes toward the side of the access through hole 22. In this embodiment, after the support body 10 is implanted in the femoral head, an external force is applied to the locking block 31 toward the outside of the receiving groove 21 to push the locking block 31 to move, and the locking block 31 slides in the receiving groove 21, and the locking inclined surface 311 and part of the locking block 31 pass through the access hole 22. During the passing process, the limit block 32 is in contact with the inner wall of the receiving groove 21 on the side of the access hole 22, and the limit block 32 can be against the inner wall of the receiving groove 21. At this time, the locking block 31 cuts into the bone of the neck of the femoral head, and the locking block 31 can be firmly fixed on the receiving groove 21. The locking block 31 can be limited by the limit block 32, and the locking block 31 will not be separated from the access hole 22, and it is firmly fixed in the receiving groove 21.

[0073] In a feasible implementation, the fixing block may include a plurality of fixing sub-block structures. The locking member 30 is an integrally formed structure.

[0074] Furthermore, if Figure 2 and Figure 3 As shown, the number of locking members 30 includes two, the number of access holes 22 includes two, and the two access holes 22 are arranged opposite to each other. In this embodiment, the number of locking members 30 includes two and they are arranged opposite to each other. After the two symmetrically arranged locking members 30 cut into the bone of the femoral head and neck, the support body 10 can be balanced in force, thereby enhancing the stability of the support body 10 in the femoral head and further preventing the support body 10 from loosening and falling off.

[0075] Furthermore, if Figure 7 and Figure 8 As shown, the limit block 32 includes: two first sub-limit blocks 33. The two first sub-limit blocks 33 are located on both sides of the locking bevel 311, and are located in the axial direction parallel to the short axis of the support body 10. In this embodiment, the first sub-limit block 33 is located on the side wall of the locking block 31 adjacent to the locking bevel 311, and the first sub-limit block 33 is located near the edge of the locking block 31, which is opposite to the edge of the locking bevel 311, and the side wall of the first sub-limit block 33 facing the inner wall of the accommodating groove 21 is parallel to the inner wall of the accommodating groove 21, and the first sub-limit block 33 protrudes toward the side of the access hole 22. Fig.10 As shown, two first sub-limiting blocks 33 are arranged opposite to each other, and the two first sub-limiting blocks 33 protrude to both sides of the access hole 22. When the first sub-limiting blocks 33 pass through, the first sub-limiting blocks 33 are in contact with the inner wall of the receiving groove 21 on the side of the access hole 22, and the first sub-limiting blocks 33 can be against the inner wall of the receiving groove 21. At this time, the locking bevel 311 of the locking block 31 cuts into the bone of the femoral head and neck. The locking block 31 can be limited by the two first sub-limiting blocks 33, and the locking block 31 is balanced in force, so that the locking block 31 can be more stable.

[0076] Furthermore, if Figure 8 and Fig. 9 As shown, the stop block 32 further includes: a second sub-stop block 34. The second sub-stop block 34 is fixedly connected to the surface of the locking block 31 facing away from the bottom of the receiving groove 21. In this embodiment, the second sub-stop block 34 protrudes toward the upper side of the access hole 22, and the second sub-stop block 34 can contact the inner wall of the receiving groove 21 after the locking block 31 passes through the access hole 22, thereby further stabilizing the locking block 31.

[0077] Furthermore, if Figure 7 and Fig. 9As shown, the locking member 30 further includes: a stopper 35. The stopper 35 is opposite to the second sub-limiting block 34, and the stopper 35 is fixedly connected to the locking block 31. The stopper 35 is located near the edge of the locking block 31 opposite to the edge of the locking inclined surface 311, and the side wall of the stopper 35 facing the inner wall of the receiving groove 21 is parallel to the inner wall of the receiving groove 21. In the embodiment, the stopper 35 protrudes toward the lower side of the access hole 22, and the stopper 35 can contact the inner wall of the receiving groove 21 after the locking block 31 passes through the access hole 22, so as to further limit and stabilize the locking block 31.

[0078] Furthermore, if Fig. 9 , Fig.10 , Fig.11 As shown, a femoral head support device also includes a locking tail cap. The locking tail cap includes: a push post 40 and a screw rod 41. The surface of the locking block 31 facing away from the entry and exit through hole 22 is a push-out inclined surface 312 inclined from the bottom of the accommodating groove 21 to the locking inclined surface 311. The cross-section of the push post 40 along the short axis direction of the support body 10 is circular. One end of the push post 40 is fixedly connected to one end of the screw rod 41, and the part of the push post 40 close to the other end of the push post 40 contacts the push-out inclined surfaces 312 of the two locking blocks 31. A screw hole 23 is provided on the bottom of the accommodating groove 21. The screw hole 23 is threadedly connected to the screw rod 41. In this embodiment, the surface of the locking block 31 facing away from the entry and exit through hole 22 is a push-out inclined surface 312, which is an inclined surface inclined outwardly, and the push-out inclined surfaces 312 of the two locking blocks 31 are both inclined outwardly, and the other end of the push post 40 contacts the push-out inclined surface 312. During the process of screwing the screw rod 41 into the screw hole 23, the push column 40 is always in contact with the locking block 31, and the push column 40 approaches the bottom of the accommodating groove 21. The other end of the push column 40 gradually squeezes and pushes out the inclined surface 312. Therefore, the push column 40 can gradually push the locking block 31 out of the access hole 22, and the locking inclined surface 311 gradually cuts into the bone of the femoral head and neck.

[0079] In this embodiment, the two locking blocks 31 are located on both sides of the screw rod 41. After the support body 10 is implanted in the femoral head, the push rod 40 is rotated to screw the screw rod 41 into the screw hole 23. The push rod 40 gradually pushes the two locking blocks 31 out of the access hole 22, and the locking bevel 311 gradually cuts into the bone of the femoral head and neck to further fix the support body 10. The screw rod 41 has an external thread.

[0080] In one possible implementation, Fig.10 and Fig.11As shown, a femoral head support device also includes an extension column 50, one end of which is fixedly connected to the end face of one end of the locking column 20, and the extension column 50 is provided with an axial threaded hole 51, the threaded hole 51 is connected to the screw hole 23, and the extension column 50 is located in the support body 10. The extension column 50 can make the screw 41 stably screwed into the screw hole 23, so that the push column 40 can move stably, and then the push column 40 can stably push the locking block 31 to move, so as to realize that the locking bevel 311 stably cuts into the bone of the femoral head and neck, and further makes the connection between the locking block 31 and the bone more stable.

[0081] In one possible implementation, Fig.11 As shown, the push post 40 is provided with an axial locking hole 42. When screwing the push post 40, a screwdriver can be placed in the locking hole 42, and the push post 40 can be conveniently screwed into the receiving groove 21 by the screwdriver. The locking hole 42 can be a hexagonal hole.

[0082] In one possible implementation, Fig.15 As shown, the push rod 40 can be a cylinder. Of course, as shown in FIG. Fig.14 As shown, the push platform 43 may also be a cone or a truncated cone.

[0083] Furthermore, if Fig.12 , Fig.13 , Fig.14 As shown, the push column 40 includes: a push platform 43. The push platform 43 is a truncated cone structure, and one end of the push platform 43 with the smallest diameter is fixedly connected to the screw rod 41, and the part of the push platform 43 close to the other end of the push platform 43 contacts the push-out inclined surfaces 312 of the two locking blocks 31. The diameter of the push platform 43 gradually increases from one end close to the screw rod 41 to the other end away from the screw rod 41, and the outer wall of the push platform 43 forms an extrusion surface that gradually spreads outward. In this embodiment, during the process of the screw rod 41 being screwed into the screw hole 23, the push platform 43 approaches the bottom of the accommodating groove 21, and part of the outer surface of the push platform 43 gradually squeezes the surface of the locking block 31 facing away from the entrance and exit through hole 22, so that the contact area between the push platform 43 and the locking block 31 increases, and the push platform 43 can push the locking block 31 out of the entrance and exit through hole 22 more stably, and the locking inclined surface 311 gradually cuts into the bone of the femoral head and neck.

[0084] In a feasible implementation, the push platform 43 may be provided with an axial locking hole 42. When the push platform 43 is screwed in, a screwdriver may be placed in the locking hole 42, and the push platform 43 may be conveniently screwed into the receiving groove 21 by the screwdriver. The locking hole 42 may be a hexagonal hole.

[0085] In a feasible implementation, the side wall of the limit block 32 facing away from the inner wall of the accommodating groove 21 is parallel and flush with the surface of the locking block 31 facing away from the access hole 22. That is, the side wall of the limit block 32 facing the push platform 43 is parallel and flush with the surface of the locking block 31 facing away from the access hole 22.

[0086] In a feasible implementation, the side walls of the two first sub-limit blocks 33 facing away from the inner wall of the accommodating groove 21 are parallel and flush with the surface of the locking block 31 facing away from the entry and exit hole 22, and are in contact with the outer surface of the push platform 43, and the side walls of the second sub-limit block 34 facing away from the inner wall of the accommodating groove 21 are parallel and flush with the surface of the locking block 31 facing away from the entry and exit hole 22 and can be in contact with the push platform 43.

[0087] In one possible implementation, Fig. 9 As shown, there is a certain distance between the side wall of the first sub-limit block 33 facing the inner wall of the accommodating groove 21 and the edge of the locking bevel 311, and there is a certain distance between the side wall of the second sub-limit block 34 facing the inner wall of the accommodating groove 21 and the edge of the locking bevel 311. After the locking bevel 311 is in place, the first sub-limit block 33 and the second sub-limit block 34 can contact the inner wall of the accommodating groove 21.

[0088] In one possible implementation, Fig.16 , Fig.17 , Fig.18 , Fig.19 As shown, the push column 40 also includes a connecting column 44, which is provided with an axial locking hole 42, and the push platform 43 is not provided with a locking hole 42, one end of the connecting column 44 is fixedly connected to the end of the push platform 43 away from the screw 41, and when the push platform 43 is screwed in, a screwdriver can be placed in the locking hole 42, and the push platform 43 can be conveniently screwed into the receiving groove 21 by the screwdriver. Among them, the locking hole 42 can be a hexagonal hole.

[0089] In a feasible implementation, after the support body 10 is implanted into the femoral head, it is connected to the locking hole 42 through a screwdriver, and the screwdriver is rotated to drive the connecting column 44, the push platform 43 and the screw rod 41 to rotate, and screw into the screw hole 23 and the threaded hole 51. The push platform 43 gradually pushes the two locking blocks 31 outward, and the locking bevel 311 passes through the access hole 22 and cuts into the bone of the femoral head and neck. Among them, the locking tail cap is an integrated structure.

[0090] Furthermore, if Fig. 20As shown, a femoral head support device also includes an implant rod 60. A clamping portion 61 is fixedly provided at one end of the implant rod 60. A clamping portion 24 is provided on the groove wall of the accommodating groove 21. The clamping portion 24 is detachably connected to the clamping portion 61. In this embodiment, the support body 10 can be implanted into the femoral head through the implant rod 60. Specifically, the clamping portion 61 of the implant rod 60 is clamped with the clamping portion 24, and then the implant rod 60 is operated to implant the support body 10 into the femoral head. After the implantation is completed, the implant rod 60 can be removed from the clamping portion 24. After removal, the locking tail cap is screwed into the screw hole 23, and the locking bevel 311 of the locking member 30 cuts into the bone of the femoral head and neck, and the support body 10 is further fixed.

[0091] Furthermore, if Fig.21 As shown, the clamping portion 61 includes two clamping hooks 62 arranged opposite to each other. The clamping hook 62 is an L-shaped structure, and includes a connecting section and a clamping section. One end of the connecting section is fixedly connected to one end of the implant rod 60, and the other end of the connecting section is fixedly connected to one end of the clamping section. Fig. 22 As shown, the engaging portion 24 includes two slots. The two slots are arranged opposite to each other and are staggered with respect to the position of the entry and exit through hole 22. The slot is an L-shaped structure, and the slot includes a guide through hole 25 and a bayonet 26. The bayonet 26 extends axially along the long axis of the support body 10, one end of the bayonet 26 passes through the slot of the receiving groove 21, and the other end of the bayonet 26 is connected to one end of the guide through hole 25. The guide through hole 25 extends circumferentially of the receiving groove 21. The guide through hole 25 and the bayonet 26 are both provided on the groove wall of the receiving groove 21, the guide through hole 25 extends circumferentially of the receiving groove 21, and the bayonet 26 extends axially along the long axis of the support body 10. The hook 62 rotates to slide out or slide into the guide hole 25. Specifically, the hook 62 enters the guide hole 25 through the bayonet 26. The implant rod 60 is rotated, and the hook 62 can enter the guide hole 25 and be stuck on the groove wall of the accommodating groove 21. When the implant rod 60 needs to be removed, the implant rod 60 is rotated in the opposite direction, and the hook 62 slides out to the bayonet 26 and can be removed.

[0092] In one possible implementation, Fig.23 As shown, the other end of the bayonet 26 is communicated with the middle of the guide through hole 25, and the bayonet 26 and the guide through hole 25 form a T-shaped through hole structure.

[0093] In one possible implementation, Fig. 22 and Fig.24 As shown, in the two slots, the other end of one of the slots 26 is connected to one end of the connected guide through hole 25, and the other end of the other slot 26 is connected to the other end of the connected guide through hole 25, and the two slots form a structure with opposite directions. At the same time, the L-shaped clamping sections of the hook 62 are in opposite directions, and the two hooks 62 can be located on the edge of the end of the implant rod 60.

[0094] In a feasible implementation, the material of the implant rod 60 may include titanium alloy, stainless steel, polymer material or the like.

[0095] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0096] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0097] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0098] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0099] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0100] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A femoral head support device, characterized in that: include: A support body (10), a locking column (20) and at least one locking member (30); The supporting body (10) is a mesh column structure with one end open; One end of the locking column (20) is fixedly connected to one end of the supporting body (10); The locking piece (30) is arranged on the locking column (20) and can slide on the locking column (20) under the action of an external force, and a part of the locking piece (30) can pass through the locking column (20); Wherein, the locking column (20) has a receiving groove (21) on the other end; The containing groove (21) has at least one entry and exit through hole (22) formed on its side wall; The locking member (30) is placed in the receiving groove (21) and close to the access hole (22), and can slide in the receiving groove (21) under the action of external force, and a part of the locking member (30) can pass through the access hole (22); Wherein, the locking member (30) comprises a locking block (31) and a limiting block (32); The locking block (31) is placed in the receiving groove (21) and has a locking inclined surface (311); The locking inclined surface (311) faces the outside of the access through hole (22) and can pass through the access through hole (22); The limit block (32) is located on a side wall of the locking block (31) adjacent to the locking inclined surface (311), and is located close to an edge of the locking block (31) opposite to an edge of the locking inclined surface (311); the side wall of the limit block (32) facing the inner wall of the receiving groove (21) is parallel to the inner wall of the receiving groove (21); and the limit block (32) protrudes toward a side of the access through hole (22); Wherein, the number of the locking members (30) includes two, the number of the access through holes (22) includes two, and the two access through holes (22) are arranged opposite to each other; Wherein, it also includes a locking tail cap; the locking tail cap includes: a push column (40) and a screw rod (41); The surface of the locking block (31) facing away from the access hole (22) is a push-out inclined surface (312) inclined from the bottom of the receiving groove (21) toward the locking inclined surface (311); One end of the push column (40) is fixedly connected to one end of the screw rod (41), and a portion close to the other end of the push column (40) contacts with surfaces of the two locking blocks (31) facing away from the access holes (22); the cross section of the push column (40) along the short axis direction of the support body (10) is circular; The receiving groove (21) has a screw hole (23) on the bottom of the groove; The screw hole (23) is threadedly connected to the screw rod (41); During the process of the screw rod (41) being screwed into the screw hole (23), the push column (40) contacts the locking block (31) and approaches the bottom of the accommodating groove (21), and the push column (40) gradually squeezes the pushing out inclined surface (312) during the movement, so as to gradually push the two locking blocks (31) out of the access through hole (22), and make the locking inclined surface (311) gradually cut into the bone of the femoral head and neck.

2. A femoral head support device according to claim 1, characterized in that: The limiting block (32) comprises: two first sub-limiting blocks (33); The two first sub-limiting blocks (33) are located on both sides of the locking inclined surface (311) and in an axial direction parallel to the short axis of the support body (10).

3. A femoral head support device according to claim 2, characterized in that: The limiting block (32) further comprises: a second sub-limiting block (34); The second sub-limiting block (34) is fixedly connected to the surface of the locking block (31) facing away from the bottom of the accommodating groove (21).

4. A femoral head support device according to claim 3, characterized in that: The locking member (30) further comprises: a stopper (35); The stop block (35) is opposite to the second sub-limit block (34), fixedly connected to the locking block (31), and is located close to the edge of the locking block (31) opposite to the edge of the locking inclined surface (311), and the side wall of the stop block (35) facing the inner wall of the accommodating groove (21) is parallel to the inner wall of the accommodating groove (21).

5. The femoral head support device according to claim 1, characterized in that: The push column (40) comprises: a push platform (43); The pushing platform (43) is a truncated cone structure, one end with the smallest diameter is fixedly connected to the screw rod (41), and the other end is in contact with the pushing inclined surfaces (312) of the two locking blocks (31).

6. The femoral head support device according to claim 1, characterized in that: Also included is an implant rod (60); The implant rod (60) has a clamping portion (61) fixedly disposed at one end; The receiving groove (21) has a clamping portion (24) disposed on the groove wall; The clamping portion (24) is detachably connected to the clamping portion (61).

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