Knee prosthesis

Abstract

The present invention provides a knee joint prosthesis, which includes a tibial plateau part, an extension stem, a filling piece, and a height adjustment component; the filling piece is arranged between the tibial plateau part and the extension stem to connect the tibial plateau part and the extension stem; a height adjustment component is arranged between the tibial plateau part and the filling piece, and by making at least part of the height adjustment component telescopically arranged, the effect of adjusting the distance between the tibial plateau part and the filling piece is achieved. Adjusting the distance between the tibial plateau part and the filling piece also adjusts the distance between the tibial plateau part and the extension stem, which causes the overall height of the knee joint prosthesis to change, thereby realizing the adjustment of the height of the knee joint prosthesis so that the overall height of the knee joint prosthesis can better match the bone defect at the corresponding knee joint; it can be seen that the knee joint prosthesis can meet different bone defect situations at the knee joint and has good versatility.

Description

Technical Field

[0001] The present invention relates to the medical field, and more particularly, to a knee prosthesis. Background Art

[0002] Regarding total knee revision, during the revision, the initially implanted prosthesis and the diseased bone need to be removed, which will cause a certain degree of bone defect. Moreover, the location and degree of the bone defect vary from person to person.

[0003] When dealing with the problem of bone defect, a knee prosthesis is usually required. The structure of the existing knee prosthesis is relatively fixed and lacks flexibility. Its height is a fixed value and cannot be adjusted appropriately according to different bone defect positions and degrees to achieve better filling. Although customized knee prostheses can be made for patients to better match the bone defects of each patient to meet the needs of each patient, the customization cycle of customized knee prostheses is long, the price is expensive, and the customized knee prostheses do not have universality. Summary of the Invention

[0004] The main object of the present invention is to provide a knee prosthesis to solve the problem that the existing knee prosthesis does not have universality.

[0005] To achieve the above object, the present invention provides a knee prosthesis, which includes: a tibial plateau portion; an extension stem; a filling member disposed between the tibial plateau portion and the extension stem to connect the tibial plateau portion and the extension stem; and a height adjustment assembly, at least a part of which is telescopically disposed between the tibial plateau portion and the filling member to adjust the height of the knee prosthesis by adjusting the distance between the tibial plateau portion and the extension stem.

[0006] Further, the height adjustment assembly includes: a first adjustment member for connecting with the tibial plateau portion; a second adjustment member disposed on the filling member; and the first adjustment member is adjustably disposed relative to the second adjustment member so that at least a part of the height adjustment assembly is telescopically disposed.

[0007] Further, the first adjustment member includes a first mounting portion for connecting with the tibial plateau portion and a first adjustment portion disposed on the first mounting portion, and the first adjustment portion has a first mating portion; the second adjustment member includes a second mounting portion for mounting on the filling member and a second adjustment portion disposed on the second mounting portion, and the second adjustment portion has a second mating portion. The first adjustment member and the second adjustment member are adjustably disposed by the mutual cooperation of the first mating portion and the second mating portion.

[0008] Furthermore, the first adjusting part has an accommodation space; the second adjusting part includes an adjusting table, the adjusting table is arranged on the second mounting part, the second engaging part is arranged on the adjusting table, and at least part of the adjusting table is inserted into the accommodation space, so that when the adjusting table is inserted into or disengaged from the accommodation space, the first engaging part and the second engaging part are engaged with each other.

[0009] Furthermore, the first adjusting part includes a supporting part, the supporting part is arranged on the first mounting part, and the first engaging part is arranged on the supporting part.

[0010] Furthermore, there are multiple supporting parts, the multiple supporting parts are arranged at intervals around the circumference of the first mounting part, the multiple supporting parts enclose the accommodation space, and the first engaging part is arranged on each supporting part; there are multiple second engaging parts, the multiple second engaging parts are arranged at intervals along the outer peripheral wall of the adjusting table, and the multiple second engaging parts are respectively arranged in one-to-one correspondence with the multiple first engaging parts.

[0011] Furthermore, a plurality of protruding parts are convexly provided on the outer peripheral wall of the adjusting table, and the plurality of second engaging parts are respectively arranged on the plurality of protruding parts; a groove part is concavely provided on the inner wall of each supporting part, and the first engaging part is arranged on the groove wall of the groove part.

[0012] Furthermore, the first engaging part is an internal thread, and the second engaging part is an external thread adapted to the internal thread.

[0013] Furthermore, an assembly notch is formed between adjacent two supporting parts, and the groove part communicates with the assembly notch on the first side of the groove part, so that the second engaging part enters the groove part through the assembly notch and is engaged with the first engaging part.

[0014] Furthermore, the groove part has a stop side surface, and a step structure is formed between the groove wall, the stop side surface of the groove part and the inner wall of the supporting part; wherein, the stop side surface is arranged towards the direction in which the protruding part enters the groove part, so that when the protruding part moves from the first side of the groove part to the second side of the groove part, at least part of the side wall of the protruding part facing the stop side surface abuts against the stop side surface, and the stop side surface forms a stop effect on the protruding part.

[0015] Furthermore, the first engaging part includes a plurality of first positioning card slots, the plurality of first positioning card slots are arranged at intervals in the height direction of the knee joint prosthesis, the second engaging part is a first clamping platform, and the first clamping platform can be selectively inserted into one of the plurality of first positioning card slots.

[0016] Furthermore, the first engaging part is a second clamping platform, the second engaging part includes a plurality of second positioning card slots, the plurality of second positioning card slots are arranged at intervals along the extending direction of the adjusting table, and the second clamping platform can be selectively inserted into one of the plurality of second positioning card slots.

[0017] Further, the knee joint prosthesis further includes a connecting component, which is disposed between the first adjusting component and the tibial plateau portion, so that the first adjusting component and the tibial plateau portion are connected through the connecting component; wherein, the first mounting portion is used for mounting on the connecting component.

[0018] Further, the connecting component has a first mounting groove, and the first mounting portion is rotatably mounted in the first mounting groove; a second mounting groove is provided on the filling member, and the second mounting portion is fixedly mounted in the second mounting groove.

[0019] Further, a second mounting groove is provided on the filling member, and the second mounting portion is rotatably mounted in the second mounting groove; the connecting component has a first mounting groove, and the first mounting portion is fixedly mounted in the first mounting groove.

[0020] Further, the tibial plateau portion includes a reinforcing wing group, and the reinforcing wing group includes a plurality of reinforcing wings; the filling member includes a plurality of airfoil hole groups, and the plurality of airfoil hole groups are arranged at intervals along the circumferential direction of the filling member; each airfoil hole group includes a plurality of airfoil holes, and the plurality of airfoil holes in each airfoil hole group are arranged in one-to-one correspondence with the plurality of reinforcing wings, so that each reinforcing wing is inserted into the corresponding airfoil hole; the reinforcing wing group can be selectively matched with a corresponding airfoil hole group.

[0021] Further, there are two airfoil hole groups; and / or, there are two reinforcing wings, and there are two airfoil holes in each airfoil hole group.

[0022] Further, the tibial plateau portion further includes: a tibial plate; a tibial column, the tibial plate is disposed on the tibial column, each reinforcing wing is disposed between the tibial plate and the tibial column, each reinforcing wing has a first side wall and a second side wall, the first side wall is in close contact with the bottom wall of the tibial plate, and the second side wall is in close contact with the outer peripheral wall of the tibial column; wherein, the filling member further has an adjusting channel, and at least a part of the tibial column is movably inserted into the adjusting channel.

[0023] Further, the filling member includes a filling block, and the plurality of airfoil holes in each airfoil hole group are all provided on the filling block, and the filling block includes a filling portion and a trimming portion which are oppositely arranged; wherein, the filling portion is used for filling the bone defect of the patient's knee joint.

[0024] Further, the connecting component has a through hole and a receiving groove, so that at least a part of at least one reinforcing wing of the reinforcing wing group passes through the through hole and then is inserted into the corresponding airfoil hole, and at least a part of the tibial column is limited and received in the receiving groove.

[0025] Further, the extension stem includes an extension stem body and a plugging portion, the plugging portion is disposed on the extension stem, the filling member has a plugging hole adapted to the plugging portion, and the extension stem and the filling member are detachably connected by inserting at least a part of the plugging portion into the plugging hole.

[0026] Furthermore, the plug-in portion is a columnar structure, and the cross-sectional area of the plug-in portion gradually decreases from the insertion direction of the plug-in portion; wherein the cross-sectional area of the plug-in portion is the area of the cross section of the plug-in portion perpendicular to the extension direction of the plug-in portion.

[0027] Furthermore, an anti-rotation ridge structure is provided on the extension handle body, and the anti-rotation ridge structure includes a plurality of ridge-like protrusions, and the plurality of ridge-like protrusions are arranged at intervals around the circumference of the extension handle body, and each ridge-like protrusion is arranged along the extension direction of the extension handle body.

[0028] Furthermore, a tuning fork structure is provided on the extension handle body, and the tuning fork structure includes a plurality of elastic openings, and the plurality of elastic openings are arranged at intervals around the circumference of the extension handle body, and each elastic opening is arranged along the extension direction of the extension handle body.

[0029] The present invention provides a knee prosthesis comprising a tibial plateau, an extension stem, a filler, and a height adjustment assembly. The filler is disposed between the tibial plateau and the extension stem to connect the two. A height adjustment assembly is disposed between the tibial plateau and the filler, and at least a portion of the height adjustment assembly is retractably disposed to adjust the distance between the tibial plateau and the filler. The filler is disposed between the tibial plateau and the extension stem to connect the two. Adjusting the distance between the tibial plateau and the filler also adjusts the distance between the tibial plateau and the extension stem, thereby adjusting the overall height of the knee prosthesis. In a specific implementation, the degree of retraction of the height adjustment assembly is adjusted according to the actual condition of the patient's knee bone defect, so that the overall height of the knee prosthesis can better match the corresponding knee bone defect. Thus, the knee prosthesis can accommodate different knee bone defect conditions, making the knee prosthesis highly versatile, thereby resolving the problem of conventional knee prostheses lacking universality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0031] Figure 1 An exploded structural diagram of a knee joint prosthesis according to an embodiment of the present invention is shown;

[0032] Figure 2 Shown Figure 1 A schematic diagram of the structure of a height adjustment component of a knee joint prosthesis;

[0033] Figure 3 Shown Figure 2Schematic structural diagram of the first adjusting member of the height adjusting assembly of the knee joint prosthesis therein;

[0034] Figure 4 Shows Figure 2 Schematic structural diagram of the second adjusting member of the height adjusting assembly of the knee joint prosthesis therein;

[0035] Figure 5 Shows Figure 2 Schematic structural diagram of the second adjusting member of the height adjusting assembly of the knee joint prosthesis therein after rotating relative to the first adjusting member;

[0036] Figure 6 Shows Figure 1 Schematic structural diagram of the cooperation between the first adjusting member of the height adjusting assembly of the knee joint prosthesis and the connecting component therein;

[0037] Figure 7 Shows Figure 1 Schematic structural diagram of the tibial plateau part of the knee joint prosthesis therein;

[0038] Figure 8 Shows Figure 1 Schematic structural diagram of the connecting component of the knee joint prosthesis therein from the first perspective;

[0039] Figure 9 Shows Figure 8 Schematic structural diagram of the connecting component of the knee joint prosthesis therein from the second perspective;

[0040] Figure 10 Shows Figure 1 Schematic external structural diagram of the filling member of the knee joint prosthesis therein;

[0041] Figure 11 Shows Figure 10 Schematic internal sectional view structure diagram of the filling member of the knee joint prosthesis therein;

[0042] Figure 12 Shows Figure 1 Schematic first assembly structure diagram of the tibial plateau part and the filling member of the knee joint prosthesis therein;

[0043] Figure 13 Shows Figure 1 Schematic second assembly structure diagram of the tibial plateau part and the filling member of the knee joint prosthesis therein;

[0044] Figure 14 Shows Figure 1 Schematic structural diagram of the extension stem of the knee joint prosthesis therein; and

[0045] Figure 15 Shows Figure 14 Bottom view of the extension stem of the knee joint prosthesis therein.

[0046] Among them, the above-mentioned drawings include the following reference numerals:

[0047] 10. Tibial plateau part; 11. Tibial plate; 12. Reinforcing wing; 13. Tibial column; 20. Connecting component; 21. First installation groove; 23. Through hole; 24. Accommodating groove; 30. Height adjustment component; 31. First adjusting part; 311. First installation part; 312. First adjusting part; 313. Accommodating space; 314. Assembly notch; 315. First matching part; 316. Groove part; 3161. Stopping side; 317. Supporting part; 32. Second adjusting part; 321. Second installation part; 322. Second adjusting part; 323. Adjusting table; 324. Protruding part; 325. Second matching part; 40. Filler; 41. First airfoil hole; 42. Second airfoil hole; 43. Adjusting channel; 45. Filling block; 451. Filling part; 452. Cutting part; 46. Second installation groove; 47. Positioning part; 471. Insertion hole; 50. Extension handle; 51. Extension handle body; 511. Ridge-like protrusion; 512. Tuning fork structure; 513. Elastic opening; 52. Insertion part; 70. Knee joint prosthesis. Detailed implementation manners

[0048] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0049] The present invention provides a knee joint prosthesis 70. Please refer to Figures 1 to 15 , the knee joint prosthesis 70 includes a tibial plateau part 10, an extension handle 50, a filler 40 and a height adjustment component 30; the filler 40 is arranged between the tibial plateau part 10 and the extension handle 50 to connect the tibial plateau part 10 and the extension handle 50; at least part of the height adjustment component 30 is telescopically arranged between the tibial plateau part 10 and the filler 40 to adjust the height of the knee joint prosthesis by adjusting the distance between the tibial plateau part 10 and the extension handle 50.

[0050] In the knee joint prosthesis 70 of the present invention, a height adjustment assembly 30 is provided between the tibial plateau portion 10 and the filling member 40. By setting at least a part of the height adjustment assembly 30 to be telescopically arranged, the effect of adjusting the distance between the tibial plateau portion 10 and the filling member 40 is achieved. The filling member 40 is arranged between the tibial plateau portion 10 and the extension stem 50 to connect the tibial plateau portion 10 and the extension stem 50. That is, adjusting the distance between the tibial plateau portion 10 and the filling member 40 also adjusts the distance between the tibial plateau portion 10 and the extension stem 50, which changes the overall height of the knee joint prosthesis 70, thereby realizing the adjustment of the height of the knee joint prosthesis 70. In the specific implementation process, the telescopic degree of the height adjustment assembly 30 is adjusted according to the actual situation of the bone defect of the patient's knee joint, so that the overall height of the knee joint prosthesis 70 can better match the bone defect at the corresponding knee joint. It can be seen that the knee joint prosthesis 70 can meet different bone defect situations at the knee joint, which makes the knee joint prosthesis 70 have good versatility, thus solving the problem that the knee joint prosthesis in the prior art does not have universality.

[0051] In order to enable at least a part of the height adjustment assembly 30 to be telescopically arranged, the height adjustment assembly 30 includes a first adjustment member 31 and a second adjustment member 32. The first adjustment member 31 is used to connect with the tibial plateau portion 10. The second adjustment member 32 is arranged on the filling member 40. The first adjustment member 31 is arranged to be position-adjustable relative to the second adjustment member 32 so that at least a part of the height adjustment assembly 30 is telescopically arranged. By changing the relative position between the first adjustment member 31 and the second adjustment member 32, the telescopic degree of the height adjustment assembly 30 is adjusted, and then the distance between the tibial plateau portion 10 and the filling member 40 is adjusted.

[0052] In order to realize the assembly between the first adjustment member 31 and the tibial plateau portion 10, as Figures 2 to 5 shown, the first adjustment member 31 includes a first mounting portion 311 and a first adjustment portion 312. The first mounting portion 311 is used to connect with the tibial plateau portion 10. The first adjustment portion 312 is arranged on the first mounting portion 311. The first adjustment portion 312 has a first mating portion 315. Optionally, the first mounting portion 311 is a plate-like structure, and the first mounting portion 311 is preferably a circular plate.

[0053] The first adjusting part 312 is arranged at the bottom of the first mounting part 311. The second adjusting member 32 includes a second mounting part 321 and a second adjusting part 322. The second mounting part 321 is used for mounting on the filling member 40. The second adjusting part 322 is arranged on the second mounting part 321, and the second adjusting part 322 has a second mating part 325. Optionally, the second mounting part 321 is a plate-like structure, and the second mounting part 321 is preferably a circular plate. The second adjusting part 322 is arranged at the top of the second mounting part 321. The positions of the first adjusting member 31 and the second adjusting member 32 are adjustably arranged through the mutual cooperation of the first mating part 315 and the second mating part 325, that is, under the mutual cooperation of the first mating part 315 and the second mating part 325, the relative positions between the first adjusting member 31 and the second adjusting member 32 can be changed.

[0054] Specifically, the first adjusting part 312 has an accommodation space 313. The second adjusting part 322 includes an adjusting table 323. The adjusting table 323 is arranged on the second mounting part 321. At least part of the adjusting table 323 is inserted into the accommodation space 313. The second mating part 325 is arranged on the adjusting table 323 so that when the adjusting table 323 is inserted into or disengaged from the accommodation space 313, the first mating part 315 and the second mating part 325 can be mutually mated. In the specific implementation process, the adjusting table 323 is inserted into or disengaged from the accommodation space 313 by operating the first adjusting member 31 or the second adjusting member 32. Optionally, the adjusting table 323 is a columnar structure, and the adjusting table 323 is preferably a cylindrical structure. At this time, the adjusting table 323 can be inserted into or disengaged from the accommodation space 313 by rotating the first adjusting member 31 or the second adjusting member 32.

[0055] In the specific implementation process, the first adjusting part 312 includes a support part 317. The support part 317 is arranged on the first mounting part 311. The first mating part 315 is arranged on the support part 317. Optionally, the support part 317 is arranged at the bottom of the first mounting part 311, and the adjusting table 323 is arranged at the top of the second mounting part 321.

[0056] In the specific implementation process, there are multiple support parts 317. The multiple support parts 317 are arranged at intervals around the circumference of the first mounting part 311. The multiple support parts 317 enclose the accommodation space 313. The first mating part 315 is arranged on each support part 317. There are multiple second mating parts 325. The multiple second mating parts 325 are arranged at intervals along the outer peripheral wall of the adjusting table 323, and the multiple second mating parts 325 are respectively arranged corresponding to the multiple first mating parts 315 one by one so that each second mating part 325 can be respectively mated with the corresponding first mating part 315.

[0057] During the specific implementation process, a plurality of convex portions 324 are provided on the outer peripheral wall of the adjustment table 323, and a plurality of second engaging portions 325 are correspondingly provided on the plurality of convex portions 324; a groove portion 316 is recessed on the inner wall of each support portion 317, and the first engaging portion 315 is provided on the groove wall of the groove portion 316, so that when the adjustment table 323 is inserted into or disengaged from the accommodation space 313, each convex portion 324 is inserted into or disengaged from the corresponding groove portion 316, and thus the mutual cooperation between each first engaging portion 315 and the corresponding second engaging portion 325 is realized by each convex portion 324 being inserted into or disengaged from the corresponding groove portion 316. Optionally, each support portion 317 is an arc-shaped plate structure; it should be noted that the inner wall of the above-mentioned support portion 317 is the wall surface of the support portion 317 facing the accommodation space 313; the groove wall of the above-mentioned groove portion 316 is the wall surface provided along the extending direction of the support portion 317 (i.e., the surrounding direction of the plurality of support portions 317).

[0058] During the specific implementation process, the first engaging portion 315 is an internal thread, and the second engaging portion 325 is an external thread adapted to the internal thread. By rotating the first adjusting member 31 or the second adjusting member 32, the depth of insertion of the adjustment table 323 into the accommodation space 313 can be adjusted, and thus the relative position between the first adjusting member 31 and the second adjusting member 32 can be adjusted.

[0059] During the specific implementation process, an assembly gap 314 is formed between adjacent two support portions 317, and the groove portion 316 communicates with the assembly gap 314 on the first side of the groove portion 316, so that the second engaging portion 325 enters the groove portion 316 through the assembly gap 314 and cooperates with the first engaging portion 315. This not only makes the operation of realizing the cooperation between the first engaging portion 315 and the second engaging portion 325 more convenient, but also makes the assembly and disassembly between the first adjusting member 31 and the second adjusting member 32 more convenient. It should be noted that, in the clockwise direction, the first side of the groove portion 316 on each support portion 317 is its left side, or the first side of the groove portion 316 on each support portion 317 is its right side.

[0060] During the specific implementation process, the groove portion 316 has a stop side surface 3161, and a step structure is formed among the groove wall of the groove portion 316, the stop side surface 3161 and the inner wall of the support portion 317; wherein, the stop side surface 3161 is arranged towards the direction in which the convex portion 324 enters the groove portion 316, so that when the convex portion 324 moves from the first side of the groove portion 316 to the second side of the groove portion 316, at least part of the side wall of the convex portion 324 facing the stop side surface 3161 abuts against the stop side surface 3161, enabling the stop side surface 3161 to form a stopping effect on the convex portion 324; this can prevent the first adjusting member 31 and the second adjusting member 32 from continuing to rotate after the relative position between the first adjusting member 31 and the second adjusting member 32 is adjusted, thereby changing the height of the knee joint prosthesis 70 and destroying the adaptability between the knee joint prosthesis 70 and the bone defect of the corresponding knee joint.

[0061] Alternatively, the first engaging portion 315 includes a plurality of first positioning slots, and the plurality of first positioning slots are arranged at intervals along the height direction of the knee joint prosthesis 70; the second engaging portion 325 is a first clamping platform, and the first clamping platform can be selectively inserted into one of the plurality of first positioning slots. When the first clamping platform is inserted into different first positioning slots, the depth of the adjusting platform 323 inserted into the accommodating space 313 is different, that is, the relative position between the first adjusting member 31 and the second adjusting member 32 is different.

[0062] Or, the first engaging portion 315 is a second clamping platform, the second engaging portion 325 includes a plurality of second positioning slots, the plurality of second positioning slots are arranged at intervals along the extending direction of the adjusting platform 323, and the second clamping platform can be selectively inserted into one of the plurality of second positioning slots. When the second clamping platform is inserted into different second positioning slots, the depth of the adjusting platform 323 inserted into the accommodating space 313 is different, that is, the relative position between the first adjusting member 31 and the second adjusting member 32 is different. It should be noted that the height direction of the knee joint prosthesis 70 is the same as the extending direction of the adjusting platform 323.

[0063] In order to achieve the assembly between the first adjusting member 31 and the tibial plateau portion 10, the knee joint prosthesis 70 further includes a connecting member 20, and the connecting member 20 is arranged between the first adjusting member 31 and the tibial plateau portion 10, so that the first adjusting member 31 and the tibial plateau portion 10 are connected through the connecting member 20; wherein, the first mounting portion 311 is used for mounting on the connecting member 20.

[0064] During the specific implementation process, in order to adjust the relative position between the first adjusting member 31 and the second adjusting member 32 by enabling the first adjusting member 31 and the second adjusting member 32 to rotate relative to each other, such as Figure 6 、 Figure 9 and Figure 10As shown, the connecting member 20 has a first mounting groove 21, and the first mounting portion 311 is rotatably mounted in the first mounting groove 21 so that the first adjusting member 31 can rotate relative to the connecting member 20; the filling member 40 is provided with a second mounting groove 46, and the second mounting portion 321 is fixedly mounted in the second mounting groove 46 so that the second adjusting member 32 is relatively fixed to the filling member 40. Alternatively, the filling member 40 is provided with a second mounting groove 46, and the second mounting portion 321 is rotatably mounted in the second mounting groove 46 so that the second adjusting member 32 can rotate relative to the filling member 40; the connecting member 20 has a first mounting groove 21, and the first mounting portion 311 is fixedly mounted in the first mounting groove 21 so that the first adjusting member 31 is relatively fixed to the connecting member 20. Optionally, the connecting member 20 is a plate-like structure, and the first mounting groove 21 is provided on the bottom wall of the connecting member 20.

[0065] To achieve the assembly between the tibial plateau portion 10 and the filling member 40, as Figure 7 , Figure 10 , Figure 12 and Figure 13 shown, the tibial plateau portion 10 includes a reinforcing wing group, and the reinforcing wing group includes a plurality of reinforcing wings 12; the filling member 40 includes a plurality of airfoil hole groups, and the plurality of airfoil hole groups are arranged at intervals along the circumference of the filling member 40; each airfoil hole group includes a plurality of airfoil holes, and the plurality of airfoil holes of each airfoil hole group are arranged in one-to-one correspondence with the plurality of reinforcing wings 12 so that each reinforcing wing 12 is inserted into the corresponding airfoil hole; the reinforcing wing group can be selectively matched with a corresponding airfoil hole group.

[0066] Optionally, the number of airfoil hole groups is two; and / or, the number of reinforcing wings 12 is two, and the number of airfoil holes in each airfoil hole group is two. In this embodiment, the number of airfoil hole groups is two, and the two airfoil hole groups are respectively a first airfoil hole group and a second airfoil hole group; the number of reinforcing wings 12 is two, the first airfoil hole group includes two first airfoil holes 41, and the two first airfoil holes 41 are respectively arranged in one-to-one correspondence with the two reinforcing wings 12, and the second airfoil hole group includes two second airfoil holes 42, and the two second airfoil holes 42 are respectively arranged in one-to-one correspondence with the two reinforcing wings 12 so that each reinforcing wing 12 can be inserted into the corresponding first airfoil hole 41 or the corresponding second airfoil hole 42, that is, the two reinforcing wings 12 of the reinforcing wing group can be selectively matched with the two first airfoil holes 41 of the first airfoil hole group or the two second airfoil holes 42 of the second airfoil hole group.

[0067] During the specific implementation process, the tibial plateau portion 10 further includes a tibial plate 11 and a tibial column 13. The tibial plate 11 is disposed on the tibial column 13, and each reinforcing wing 12 is disposed between the tibial plate 11 and the tibial column 13. Each reinforcing wing 12 has a first side wall and a second side wall. The first side wall is in abutting contact with the bottom wall of the tibial plate 11, and the second side wall is in abutting contact with the outer peripheral wall of the tibial column 13. Among them, the filling member 40 further has an adjustment channel 43, and at least a part of the tibial column 13 is inserted into the adjustment channel 43. By providing the reinforcing wings 12, the supporting effect on the tibial plate 11 can be made more stable, so that the overall structure of the tibial plateau portion 10 is more stable. The cooperation between the tibial column 13 and the filling member 40 helps to further enhance the stability of the structure after the tibial plateau portion 10 and the filling member 40 are assembled. Optionally, the tibial column 13 is fixed to the bottom of the tibial plate 11, and the tibial column 13 has a cylindrical structure; each reinforcing wing 12 has a generally triangular structure, and the adjacent two side walls of the triangular structure are respectively the first side wall and the second side wall.

[0068] During the specific implementation process, the filling member 40 includes a filling block 45. A plurality of airfoil holes of each airfoil hole group, a second installation groove 46, and an adjustment channel 43 are all disposed on the filling block 45; optionally, a plurality of airfoil holes of each airfoil hole group and the adjustment channel 43 penetrate through the top wall of the filling block 45, and the second installation groove 46 is disposed on the top wall of the filling block 45.

[0069] As Figures 10 to 13 shown, the filling block 45 includes a filling portion 451 and a trimming portion 452 which are oppositely arranged; among them, the filling portion 451 is used to fill the bone defect of the patient's knee joint; when each reinforcing wing 12 of the reinforcing wing group is correspondingly inserted into each first airfoil hole 41 of the first airfoil hole group, the filling portion 451 is used to fill the medial bone defect of the left knee joint or the lateral bone defect of the right knee joint of the patient; when each reinforcing wing 12 of the reinforcing wing group is correspondingly inserted into each second airfoil hole 42 of the second airfoil hole group, the filling portion 451 is used to fill the lateral bone defect of the left knee joint or the medial bone defect of the right knee joint of the patient.

[0070] During the specific implementation, the connecting component 20 has a through hole 23 and a receiving groove 24, so that at least a portion of at least one reinforcing wing 12 of the reinforcing wing group passes through the through hole 23 and then passes through the corresponding wing-shaped hole, and at least a portion of the tibial column 13 is limitedly received in the receiving groove 24; this makes the overall structure of the assembled knee joint prosthesis 70 more compact and regular. Optionally, the top wall of the connecting component 20 is in contact with the bottom wall of the tibial plate 11, and bone cement can be further used to bond the top wall of the connecting component 20 to the bottom wall of the tibial plate 11 to relatively fix the connecting component 20 and the tibial plate 10; alternatively, screws can be inserted through the connecting component 20 and the tibial plate 11 to relatively fix the connecting component 20 and the tibial plate 10.

[0071] In order to realize the assembly between the extension handle 50 and the filling piece 40, as shown in FIG. Figure 11 and Figure 14 As shown, the extension handle 50 includes an extension handle body 51 and an inserting portion 52. The inserting portion 52 is provided on the extension handle 50. The filler 40 has an inserting hole 471 adapted to the inserting portion 52. By inserting at least a portion of the inserting portion 52 into the inserting hole 471, the extension handle 50 and the filler 40 are detachably connected. Optionally, the inserting portion 52 is provided at the top of the extension handle body 51.

[0072] During the specific implementation process, the filling piece 40 also includes a positioning portion 47, the filling block 45 is arranged on the top of the positioning portion 47, and the plug-in hole 471 is arranged on the positioning portion 47; optionally, the plug-in hole 471 passes through the bottom wall of the positioning portion 47, and the adjustment channel 43 is connected to the plug-in hole 471.

[0073] Specifically, the plug portion 52 is a columnar structure, and the insertion hole 471 is a columnar hole. The cross-sectional area of the plug portion 52 gradually decreases as it moves in the insertion direction. The cross-sectional area of the plug portion 52 is defined as the area of the cross section of the plug portion 52 perpendicular to its extension direction. This not only ensures a more stable insertion of the plug portion 52 into the insertion hole 471, thereby further stabilizing the assembly of the extension handle 50 and the filler 40, but also facilitates insertion of the plug portion 52 into the insertion hole 471. In this embodiment, the "insertion direction of the plug portion 52" refers to the direction of the plug portion 52 toward the filler 40.

[0074] Specifically, the extension stem body 51 is provided with an anti-rotation ridge structure comprising a plurality of ridge-like protrusions 511, which are spaced apart circumferentially around the extension stem body 51; each ridge-like protrusion 511 is arranged along the extension direction of the extension stem body 51. The anti-rotation ridge structure prevents the extension stem 50 from rotating within the medullary cavity, thereby ensuring the stability of the knee joint prosthesis 70 after implantation.

[0075] Specifically, as shown in Figure 14 and Figure 15 shown, a tuning fork structure 512 is provided on the extension shank body 51. The tuning fork structure 512 includes a plurality of elastic openings 513. The plurality of elastic openings 513 are arranged at intervals in the circumferential direction of the extension shank body 51, and each elastic opening 513 is arranged along the extending direction of the extension shank body 51. Optionally, the tuning fork structure 512 is arranged at a position close to the lower end of the extension shank body 51, which can cause the lower end of the extension shank body 51 to undergo slight deformation under an external force, that is, the lower end of the extension shank body 51 has a certain degree of elastic effect, which can cause the extension shank body 51 to undergo slight deformation according to the actual shape of the bone marrow cavity, so that the outer peripheral wall of the extension shank body 51 is closely attached to the cavity wall of the bone marrow cavity, and the extension shank body 51 is more stably placed in the bone marrow cavity. It can be seen that by providing the tuning fork structure 512 on the extension shank body 51, the extension shank body 51 can better adapt to different bone marrow cavities, which helps to improve the versatility of the extension shank 50. In addition, the better adaptive cooperation between the extension shank body 51 and the bone marrow cavity can also reduce the pain in the patient's leg, and further improve the comfort of the patient's leg after the knee joint prosthesis 70 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.

[0076] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0077] In the knee joint prosthesis 70 of the present invention, the knee joint prosthesis 70 includes a tibial plateau portion 10, an extension shank 50, a filling member 40, and a height adjustment assembly 30. The filling member 40 is arranged between the tibial plateau portion 10 and the extension shank 50 to connect the tibial plateau portion 10 and the extension shank 50. A height adjustment assembly 30 is arranged between the tibial plateau portion 10 and the filling member 40. By making at least part of the height adjustment assembly 30 be telescopically arranged, the effect of adjusting the distance between the tibial plateau portion 10 and the filling member 40 is achieved. And the filling member 40 is arranged between the tibial plateau portion 10 and the extension shank 50 to connect the tibial plateau portion 10 and the extension shank 50, that is, adjusting the distance between the tibial plateau portion 10 and the filling member 40 also adjusts the distance between the tibial plateau portion 10 and the extension shank 50, which changes the overall height of the knee joint prosthesis 70, thereby realizing the adjustment of the height of the knee joint prosthesis 70. In the specific implementation process, according to the actual situation of the bone defect of the patient's knee joint, the telescopic degree of the height adjustment assembly 30 is adjusted so that the overall height of the knee joint prosthesis 70 can better match the bone defect at the corresponding knee joint. It can be seen that the knee joint prosthesis 70 can meet different bone defect situations at the knee joint, which makes the knee joint prosthesis 70 have good versatility, thus solving the problem that the knee joint prosthesis in the prior art does not have universality.

[0078] In addition, in the knee joint prosthesis 70, the tibial plateau part 10 and the filling piece 40, the filling piece 40 and the extension stem 50, the height adjustment assembly 30 and the filling piece 40 and the connecting part 20 respectively, and the connecting part 20 and the tibial plateau part 10 are all detachably connected. That is, the knee joint prosthesis 70 is assembled by the tibial plateau part 10, the connecting part 20, the height adjustment assembly 30, the filling piece 40 and the extension stem 50. In the actual application process, the above-mentioned components with the most suitable specifications can be selected according to the actual situation of the bone defect to assemble the most adaptable knee joint prosthesis 70. Moreover, the detachable connection between the components also makes the assembly and disassembly of the knee joint prosthesis 70 relatively convenient, which is beneficial to increasing the convenience of the work of implanting the knee joint prosthesis 70.

[0079] In addition, the structure of the knee joint prosthesis 70 provided by the present invention avoids opening connection holes on the tibial plateau part 10 to connect the tibial plateau part 10 with the extension stem 50 through the connection holes, which helps to strengthen the overall structural strength of the tibial plateau part 10, and further ensures the overall structural strength of the knee joint prosthesis 70.

[0080] For the sake of convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "upper" etc. can be used here to describe the spatial position relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure of the device. For example, if the device in the attached drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will be positioned as "below other devices or structures" or "under other devices or structures" afterwards. Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations are made for the spatial relative descriptions used here.

[0081] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0082] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0083] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A knee joint prosthesis, characterized in that, Comprising: A tibial plateau portion (10); An extension stem (50); A filling member (40), the filling member (40) being disposed between the tibial plateau portion (10) and the extension stem (50) to connect the tibial plateau portion (10) and the extension stem (50); A height adjustment assembly (30), at least a part of the height adjustment assembly (30) being telescopically disposed between the tibial plateau portion (10) and the filling member (40) to adjust the height of the knee joint prosthesis by adjusting the distance between the tibial plateau portion (10) and the extension stem (50); The height adjustment assembly (30) includes: A first adjustment member (31), the first adjustment member (31) being used for connecting with the tibial plateau portion (10); A second adjustment member (32), the second adjustment member (32) being disposed on the filling member (40); the first adjustment member (31) is disposed such that its position is adjustable relative to the second adjustment member (so that at least a part of the height adjustment assembly (30) is telescopically disposed); The first adjustment member (31) includes a first mounting portion (311) and a first adjustment portion (312), the first mounting portion (311) being used for connecting with the tibial plateau portion (10), the first adjustment portion (312) being disposed on the first mounting portion (311), and the first adjustment portion (312) having a first mating portion (315); The second adjustment member (32) includes a second mounting portion (321) and a second adjustment portion (322), the second mounting portion (321) being used for mounting on the filling member (40), the second adjustment portion (322) being disposed on the second mounting portion (321), the second adjustment portion (322) having a second mating portion (325), and the first adjustment member (31) and the second adjustment member (32) being disposed such that their positions are adjustable through the mutual cooperation of the first mating portion (315) and the second mating portion (325); The first adjustment portion (312) has a receiving space (313); the second adjustment portion (322) includes an adjustment table (323), the adjustment table (323) being disposed on the second mounting portion (321), the second mating portion (325) being disposed on the adjustment table (323), and at least a part of the adjustment table (323) being inserted into the receiving space (313) so that when the adjustment table (323) is inserted into or detached from the receiving space (313), the first mating portion (315) and the second mating portion (325) achieve mutual cooperation; The first mating portion (315) is an internal thread, and the second mating portion (325) is an external thread adapted to the internal thread.

2. The knee joint prosthesis according to claim 1, characterized in that, The first adjustment portion (312) includes a support portion (317), the support portion (317) being disposed on the first mounting portion (311), and the first mating portion (315) being disposed on the support portion (317).

3. The knee joint prosthesis according to claim 2, characterized in that, The supporting parts (317) are multiple, and the multiple supporting parts (317) are arranged at intervals around the circumference of the first mounting part (311). The multiple supporting parts (317) enclose the accommodating space (313), and the first matching parts (315) are arranged on each of the supporting parts (317). The second matching parts (325) are multiple, and the multiple second matching parts (325) are arranged at intervals along the outer peripheral wall of the adjusting table (323), and the multiple second matching parts (325) are respectively arranged in one-to-one correspondence with the multiple first matching parts (315).

4. The knee joint prosthesis according to claim 3, wherein, A plurality of protruding parts (324) protrude from the outer peripheral wall of the adjusting table (323), and the multiple second matching parts (325) are respectively arranged on the multiple protruding parts (324) in one-to-one correspondence. A groove part (316) is recessed on the inner wall of each of the supporting parts (317), and the first matching part (315) is arranged on the groove wall of the groove part (316).

5. The knee joint prosthesis according to claim 4, characterized in that, An assembly notch (314) is formed between every two adjacent supporting parts (317), and the groove part (316) communicates with the assembly notch (314) on the first side of the groove part (316), so that the second matching part (325) enters the groove part (316) through the assembly notch (314) and cooperates with the first matching part (315).

6. The knee joint prosthesis according to claim 5, characterized in that, The groove part (316) has a stop side surface (3161), and a stepped structure is formed among the groove wall of the groove part (316), the stop side surface (3161) and the inner wall of the supporting part (317); wherein, the stop side surface (3161) is arranged towards the direction in which the protruding part (324) enters the groove part (316), so that when the protruding part (324) moves from the first side of the groove part (316) to the second side of the groove part (316), at least part of the side wall of the protruding part (324) facing the stop side surface (3161) abuts against the stop side surface (3161), and the stop side surface (3161) forms a stop effect on the protruding part (324).

7. The knee joint prosthesis according to claim 1, characterized in that, The knee joint prosthesis further includes: A connecting component (20), the connecting component (20) is arranged between the first adjusting part (31) and the tibial plateau part (10) so that the first adjusting part (31) and the tibial plateau part (10) are connected through the connecting component (20); wherein, the first mounting part (311) is used for mounting on the connecting component (20).

8. The knee joint prosthesis according to claim 7, characterized in that, The connecting component (20) has a first mounting groove (21), and the first mounting part (311) is rotatably mounted in the first mounting groove (21); a second mounting groove (46) is arranged on the filling part (40), and the second mounting part (321) is fixedly mounted in the second mounting groove (46).

9. The knee joint prosthesis according to claim 7, characterized in that, A second mounting groove (46) is provided on the filling member (40), and the second mounting portion (321) is rotatably mounted in the second mounting groove (46); the connecting member (20) has a first mounting groove (21), and the first mounting portion (311) is fixedly mounted in the first mounting groove (21).

10. The knee joint prosthesis according to claim 7, characterized in that, The tibial plateau portion (10) includes a group of strengthening wings, and the group of strengthening wings includes a plurality of strengthening wings (12); the filling member (40) includes a plurality of groups of airfoil holes, and the plurality of groups of airfoil holes are arranged at intervals along the circumference of the filling member (40); each group of airfoil holes includes a plurality of airfoil holes, and the plurality of airfoil holes in each group of airfoil holes are arranged in one-to-one correspondence with the plurality of strengthening wings (12), so that each strengthening wing (12) is inserted into the corresponding airfoil hole; the group of strengthening wings can be selectively matched with a corresponding one of the groups of airfoil holes.

11. The knee joint prosthesis according to claim 10, characterized in that, There are two groups of airfoil holes; and / or, there are two strengthening wings (12), and there are two airfoil holes in each group of airfoil holes.

12. The knee joint prosthesis according to claim 10, characterized in that, The tibial plateau portion (10) further includes: a tibial plate (11); a tibial column (13), the tibial plate (11) is disposed on the tibial column (13), each strengthening wing (12) is disposed between the tibial plate (11) and the tibial column (13), each strengthening wing (12) has a first side wall and a second side wall, the first side wall is in close contact with the bottom wall of the tibial plate (11), and the second side wall is in close contact with the outer peripheral wall of the tibial column (13); Wherein, the filling member (40) further has an adjustment channel (43), and at least a part of the tibial column (13) is movably inserted into the adjustment channel (43).

13. The knee joint prosthesis according to claim 10, characterized in that, The filling member (40) includes: a filling block (45), the plurality of airfoil holes in each group of airfoil holes are disposed on the filling block (45), and the filling block (45) includes a filling portion (451) and a trimming portion (452) arranged oppositely; wherein, the filling portion (451) is used for filling the bone defect of the affected knee joint.

14. The knee joint prosthesis according to claim 12, characterized in that, The connecting member (20) has a through hole (23) and a receiving groove (24), so that at least a part of at least one of the strengthening wings (12) of the group of strengthening wings passes through the through hole (23) and then is inserted into the corresponding airfoil hole, and at least a part of the tibial column (13) is limited and received in the receiving groove (24).

15. The knee joint prosthesis according to claim 1, characterized in that, The extension handle (50) includes an extension handle body (51) and a plug-in portion (52), the plug-in portion (52) is disposed on the extension handle (50), and the filling member (40) has a plug-in hole (471) adapted to the plug-in portion (52), and the extension handle (50) is detachably connected to the filling member (40) by inserting at least a part of the plug-in portion (52) into the plug-in hole (471).

16. The knee joint prosthesis according to claim 15, characterized in that, The plug-in part (52) has a columnar structure, and the cross-sectional area of the plug-in part (52) gradually decreases in the insertion direction of the plug-in part (52); wherein, the cross-sectional area of the plug-in part (52) is the area of the cross-section of the plug-in part (52) perpendicular to the extension direction of the plug-in part (52).

17. The knee joint prosthesis according to claim 15, characterized in that, An anti-rotation ridge structure is provided on the extension handle body (51), and the anti-rotation ridge structure includes a plurality of ridge-shaped protrusions (511), and the plurality of ridge-shaped protrusions (511) are arranged at intervals in the circumferential direction of the extension handle body (51), and each of the ridge-shaped protrusions (511) is arranged along the extension direction of the extension handle body (51).

18. The knee joint prosthesis according to claim 15, 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), and the plurality of elastic openings (513) are arranged at intervals in the circumferential direction 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).

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