Tibial prosthesis and knee joint prosthesis including the same

Abstract

The present invention relates to a tibial prosthesis and a knee joint prosthesis including the same, which are built in a modular manner, thereby reducing surgical costs, alleviating the burden on patients, and eliminating micro-motions, thereby preventing failures caused by micro-motions, thereby greatly extending the service life and avoiding patients from having to undergo frequent replacement operations.

Description

Technical Field

[0001] The present invention relates to the field of medical devices for orthopedic surgery, and in particular to a tibial prosthesis implanted in a patient's body to realize the patient's knee joint function in daily life after surgery, and a knee joint prosthesis comprising the same. Background Art

[0002] Artificial knee replacement is a plastic surgery that uses artificial biological materials to replace diseased joints in the human body and restore the normal physiological function of the knee joint. During the operation, the doctor needs to perform a characteristic osteotomy on the patient's knee joint to match the artificial joint prosthesis and restore the optimal stable shape of the knee joint.

[0003] After osteotomy of the lesion node of the knee joint, the doctor will implant the tibial and femoral components of the knee prosthesis of appropriate specifications into the knee joint according to the preoperative planning and intraoperative osteotomy data to replace the lesion of the knee joint and restore the joint's motion function.

[0004] During the artificial knee replacement surgery, different thicknesses of tibial components are required to restore joint stability according to the patient's lesions and the degree of osteotomy, which will significantly increase the cost of the surgery. At the same time, the failure of knee replacement surgery includes the following reasons: the micro-motion between the tibial tray and the tibial pad in the tibial component increases the wear of the polyethylene, and may cause aseptic loosening and then lead to prosthesis failure, which in turn causes the patient to have to undergo replacement surgery again. Therefore, a knee tibial component without micro-motion is of great significance to the design and clinical application of knee prostheses.

[0005] The tibial components currently used in artificial knee replacements are divided into two categories. One category of tibial components is assembled by press-fitting and locking through a mechanical mechanism. In order to meet clinical needs, manufacturers are usually required to produce a variety of such tibial components that only differ in thickness. This results in a higher cost for replacement surgery, a heavier burden on patients for surgical expenses, and an inability to eliminate product micro-movements. The other category of tibial components is an integral whole made of ultra-high molecular weight polyethylene. In order to meet clinical needs, manufacturers are also required to produce a variety of such tibial components that only differ in thickness. This also results in a higher cost for replacement surgery and a heavier burden on patients for surgical expenses.

[0006] Therefore, it is what the personnel in the art hope to solve to establish modular prosthetic components to reduce the operation cost and overcome the micro-movement of the prosthetic components to reduce the causes of failure of the prosthetic components. Summary of the invention

[0007] In order to solve at least one of the above problems in the prior art, the present invention provides a tibial prosthesis and a knee joint prosthesis including the same.

[0008] The tibial prosthesis is configured to replace the proximal tibia of the patient during surgery and to realize the knee joint function as the proximal tibia of the patient in daily life after surgery. The tibial prosthesis includes:

[0009] a tibial tray configured to be secured to a patient's tibia at a distal osteosynthesis surface thereof;

[0010] a tibial liner including a proximal articular surface for mating with the patient's femur or femoral prosthesis; and

[0011] an intermediate layer disposed between the tibial tray and the tibial liner;

[0012] The intermediate layer is combined with the proximal surface of the tibial tray and the distal surface of the tibial liner through a biocompatible adhesive.

[0013] According to a possible embodiment of the present invention, the intermediate layer is formed by the biocompatible adhesive.

[0014] According to a possible embodiment of the present invention, the tibial tray includes a plurality of first grooves recessed from its proximal surface for receiving the biocompatible adhesive, and the tibial liner includes a plurality of second grooves recessed from its distal surface for receiving the biocompatible adhesive.

[0015] Optionally, at least some of the first plurality of grooves extend from the proximal surface to the distal osteosynthesis surface.

[0016] Optionally, the geometry of at least some of the plurality of second grooves is configured so that their width at the distal surface is smaller than their maximum width; and the geometry of at least some of the plurality of first grooves is configured so that their width at the proximal surface is smaller than their maximum width.

[0017] According to a feasible embodiment of the present invention, the proximal surface includes a proximal inclined surface inclined relative to the proximal and distal directions at its edge, and the distal surface includes a distal inclined surface inclined relative to the proximal and distal directions at its edge, wherein the proximal inclined surface and the distal inclined surface are suitable for fitting each other.

[0018] According to a feasible embodiment of the present invention, the plurality of second grooves include at least one second main groove and a plurality of second auxiliary grooves connected to the second main groove, wherein the width of the second main groove is at least 2 times, preferably at least 4 times, and more preferably 6-10 times the width of the second auxiliary groove.

[0019] According to a possible embodiment of the present invention, at least some of the plurality of second grooves open to the outside of the tibial pad in a direction transverse to the proximal-distal direction.

[0020] According to a possible embodiment of the present invention, the geometric shapes of at least some of the plurality of second grooves are configured such that, as they extend from the center of the distal surface toward the edge of the distal surface, their depths gradually increase.

[0021] According to a feasible embodiment of the present invention, the intermediate layer includes at least one gasket, and the gasket proximal surface and the gasket distal surface opposite to each other are in contact with the biocompatible adhesive, and the gaskets are configured so that their number can be adjusted according to the size of the patient's knee joint to be replaced.

[0022] According to a feasible embodiment of the present invention, each gasket includes: a plurality of third grooves recessed from its proximal surface for receiving the biocompatible adhesive; and a plurality of fourth grooves recessed from its distal surface for receiving the biocompatible adhesive.

[0023] The present invention also relates to a knee joint prosthesis, which is configured to replace a patient's knee joint during a surgical operation and to realize the knee joint function as the patient's knee joint in daily life after the operation, and includes: a femoral prosthesis, which is configured to replace the patient's distal femur and to realize the knee joint function as the patient's distal femur in daily life after the operation; and the above-mentioned tibial prosthesis that cooperates with the femoral prosthesis.

[0024] The present invention can be embodied as the exemplary embodiments in the accompanying drawings. However, it should be noted that the drawings are only exemplary, and any changes conceived under the teachings of the present invention should be considered to be included in the scope of the present invention, and the scope of the present invention is limited only by the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings illustrate exemplary embodiments of the present invention. These drawings should not be construed as necessarily limiting the scope of the present invention. The same numbers and / or similar reference numerals throughout may refer to the same and / or similar elements. In the various drawings:

[0026] Figure 1 is a schematic perspective view of a tibial prosthesis according to a possible embodiment of the present invention;

[0027] Figure 2A is a schematic stereoscopic view of a tibial tray of a tibial prosthesis according to a possible embodiment of the present invention;

[0028] Figure 2B is a schematic top view of a tibial tray of a tibial prosthesis according to a possible embodiment of the present invention;

[0029] Figure 2C It is along Figure 2BA schematic cross-sectional view of the tibial tray taken along line II in FIG.

[0030] Figure 3A is a schematic perspective view of a tibial liner of a tibial prosthesis according to a possible embodiment of the present invention;

[0031] Figure 3B is a schematic front view of a tibial liner of a tibial prosthesis according to a possible embodiment of the present invention;

[0032] Figure 3C is a schematic right side view of a tibial liner of a tibial prosthesis according to a possible embodiment of the present invention;

[0033] Figure 3D is a schematic bottom view of a tibial liner of a tibial prosthesis according to a possible embodiment of the present invention;

[0034] Figure 4 is a schematic perspective view of a tibial prosthesis according to a possible embodiment of the present invention;

[0035] Figure 5A is a schematic top view of a spacer of a tibial prosthesis according to a possible embodiment of the present invention;

[0036] Figure 5B is a schematic bottom view of a spacer of a tibial prosthesis according to a possible embodiment of the present invention; and

[0037] Figure 5C It is along Figure 5A Schematic cross-sectional view of the gasket taken along line II-II in FIG. DETAILED DESCRIPTION

[0038] The present invention will now be described in more detail with reference to the accompanying drawings, in which exemplary embodiments of the present invention are shown. However, the present invention may be implemented in many different forms and should not be construed as necessarily being limited to the exemplary embodiments disclosed herein. On the contrary, these exemplary embodiments are merely provided to illustrate the present invention and to convey the concept of the present invention to those skilled in the art.

[0039] As used herein, with reference to the human body and the components of the system described herein intended to be implanted in the human body, the terms "proximal / proximal end P" and "distal / distal end D" are defined with respect to the position of a limb relative to the trunk, wherein the term "proximal / proximal end P" is the end of a limb, bone or prosthesis that is closer to the trunk, and the term "distal / distal end D" is the end of a limb, bone or prosthesis that is farther from the trunk, and the term "proximal / proximal end P" and the term "distal / distal end D" together define the proximal-distal direction PD. It will be understood by those skilled in the art that, in the upright state of the human body, the term "proximal / proximal end P" may be equivalent to "upper side / upper end", the term "distal / distal end D" may be equivalent to "lower side / lower end", and the term "proximal-distal direction PD" is equivalent to the vertical direction. However, it is worth noting that the above definition of relative orientation is only given for the purpose of better illustrating the technical solution of the present invention, and it should not be interpreted in any way as limiting the scope of protection of the present invention.

[0040] The tibial prosthesis according to the present invention is intended to be implanted in a patient's body to replace the patient's resected tibial proximal end of the diseased knee joint, thereby realizing the knee joint function as the patient's proximal end of the tibial proximal end of the knee joint in daily life. Figure 1 - FIG3 , the size and shape of the tibial prosthesis according to the present invention are determined by the size and shape of the proximal end of the tibia to be resected measured before the patient's knee replacement surgery and / or the proximal end of the tibia that has been resected measured during the replacement surgery, and the tibial prosthesis comprises: a tibial tray 100, the tibial tray 100 being configured to be fixed to the patient's tibia at its distal bone-engaging surface 110, in particular, the tibial tray 100 comprises a bolt 150 extending distally from its distal bone-engaging surface 110, the bolt 150 being intended to be inserted into the patient's tibia (specifically, into the medullary cavity of the tibia) for relative The tibial pad 200 is used to fix and support the entire tibial prosthesis on the patient's tibia (of course, the proximal tibial end of the patient's tibia has been resected before the bolt 150 is inserted into the tibia); the tibial pad 200 includes a proximal articular surface 210 for cooperating with the patient's femur or femoral prosthesis; and an intermediate layer 300 arranged between the tibial tray 100 and the tibial pad 200; wherein the intermediate layer 300 is combined with the proximal surface 120 of the tibial tray 100 and the distal surface 220 of the tibial pad 200 by a biocompatible adhesive (e.g., bone cement).

[0041] According to the above technical solution, the intermediate layer 300 is combined with the proximal surface 120 of the tibial tray 100 and the distal surface 220 of the tibial pad 200 by a biocompatible adhesive rather than a mechanical locking structure, that is, the tibial tray 100, the tibial pad 200 and the intermediate layer 300 are combined together by bonding rather than mechanical locking. Therefore, in daily life after implantation in the patient's body, there will be no micro-motion between the tibial tray 100, the tibial pad 200 and the intermediate layer 300, so that the failure of the prosthesis caused by micro-motion can be avoided, thereby greatly improving the service life of the tibial prosthesis of the present invention, and making it unnecessary for the patient to suffer from the pain of frequent replacement of the tibial prosthesis. In addition, since it will be combined by bonding, the proximal surface 120 of the tibial tray 100 and the distal surface 220 of the tibial pad 200 do not need to be finely processed, or there is no roughness requirement, which makes it possible to save the processing cost of the tibial prosthesis of the present invention. In addition, since the thickness of the adhesive is adjustable to a certain extent, the height of the tibial prosthesis of the present invention in the proximal and distal direction PD (vertical direction when the human body is in an upright state) is adjustable to a certain extent, which makes the tibial prosthesis of the present invention suitable for more patients to a certain extent.

[0042] According to a possible implementation of the present invention, the intermediate layer 300 is made of the biocompatible adhesive (eg, bone cement).

[0043] refer to Figure 2A and Figure 3A According to a feasible embodiment of the present invention, the tibial tray 100 includes a plurality of first grooves 130 recessed from its proximal surface 120 for receiving the biocompatible adhesive, and the tibial pad 200 includes a plurality of second grooves 230 recessed from its distal surface 220 for receiving the biocompatible adhesive.

[0044] According to the above technical solution, due to the presence of the first groove 130 and the second groove 230, the contact area between the biocompatible adhesive and the tibial tray 100 and the tibial pad 200 is significantly increased, which enables the adhesive to more firmly combine the tibial tray 100, the tibial pad 200 and the intermediate layer 300 together, thereby more thoroughly eliminating micro-motion and thus improving the service life and reliability of the tibial prosthesis of the present invention.

[0045] refer to Figure 2A-2C According to a possible embodiment of the present invention, at least some of the plurality of first grooves 130 extend from the proximal surface 120 to the distal osteosynthesis surface 110 .

[0046] According to the above technical solution, since all or part of the first groove 130 extends from the proximal surface 120 to the distal bone fracture surface 110, that is, passes through the tibial tray 100, the biocompatible adhesive can flow from the proximal surface 120 to the distal bone fracture surface 110 through the first groove 130, which makes it possible to form a locking structure when the biocompatible adhesive is cured, thereby being able to more firmly combine the tibial tray 100 and the middle layer 300 together, thereby more thoroughly eliminating micro-motion and thereby improving the service life and reliability of the tibial prosthesis of the present invention.

[0047] refer to Figure 3A-3C According to a feasible embodiment of the present invention, at least some of the plurality of second grooves 230 have the following geometric shape, that is, their width Ds at the distal surface 220 is less than their maximum width Dmax. Similarly, in a feasible embodiment not shown, at least some of the plurality of first grooves 130 have the following geometric shape, that is, their width at the proximal surface 120 is less than their maximum width. The above-mentioned "width" can be understood to refer to the dimension of the groove in a direction transverse to its main extension direction.

[0048] According to the above technical solution, since the maximum width of all or part of the grooves is greater than the width of the openings at the corresponding surfaces, the biocompatible adhesive can form a locking structure after entering the grooves and curing. Specifically, due to the shape of the grooves, the width of the biocompatible adhesive entering the grooves through the openings at the corresponding surfaces of the grooves will be greater than the width of the openings, which makes it impossible for the biocompatible adhesive to be separated from the corresponding openings after curing. Therefore, through this technical solution, the tibial tray 100, the tibial pad 200 and the intermediate layer 300 can be more firmly combined together, thereby more thoroughly eliminating micromotion and thus improving the service life and reliability of the tibial prosthesis of the present invention.

[0049] refer to Figure 2A-Figure 3C According to a feasible embodiment of the present invention, the proximal surface 120 includes a proximal inclined surface 121 inclined relative to the proximal-distal direction PD (vertical direction when the human body is upright) at its edge, and the distal surface 220 includes a distal inclined surface 221 inclined relative to the proximal-distal direction PD (vertical direction when the human body is upright) at its edge, wherein the proximal inclined surface 121 and the distal inclined surface 221 are suitable for fitting each other.

[0050] According to the above technical solution, when the tibial prosthesis of the present invention is assembled, since the proximal inclined surface 121 and the distal inclined surface 221 can fit each other, it is easier to position the tibial tray 100 and the tibial pad 200 relative to each other, and the biocompatible adhesive between the proximal surface 120 and the distal surface 220 can be prevented from escaping.

[0051] refer to Figure 3D According to a feasible embodiment of the present invention, the plurality of second grooves 230 include at least one second main groove 231 and a plurality of second auxiliary grooves 232 connected to the second main groove 231, wherein the width of the second main groove 231 is at least 2 times, preferably at least 4 times, and more preferably 6-10 times the width of the second auxiliary groove 232.

[0052] According to the above technical solution, when assembling the tibial prosthesis of the present invention, more biocompatible adhesive can be applied in the area of ​​the second main groove 231, and then when the tibial tray 100 and the tibial pad 200 are brought closer to each other, since the second main groove 231 is wider, the squeezed biocompatible adhesive will easily enter the second main groove 231, and further since the second main groove 231 is connected to the second auxiliary groove 232, the biocompatible adhesive will flow from the second main groove 231 to the second auxiliary groove 232, which promotes the filling of each groove with the biocompatible adhesive, so that the tibial tray 100 and the intermediate layer 300 can be more firmly combined together.

[0053] refer to Figures 3A-3D According to a feasible embodiment of the present invention, at least some of the plurality of second grooves 230 are opened to the outside of the tibial liner 200 in a direction transverse to the proximal-distal direction PD. Optionally, according to a feasible embodiment of the present invention not shown, at least some of the plurality of second grooves 230 have a geometric shape in which the depth gradually increases as the grooves extend from the center of the distal surface 220 toward the edge of the distal surface 220.

[0054] According to the above technical solution, since at least some of the second grooves 230 lead to the outside of the tibial pad 200 in the lateral direction, when the tibial prosthesis of the present invention is assembled, the gas (e.g., air) originally present in the groove can be easily discharged by the biocompatible adhesive, so that the biocompatible adhesive can more fully fill the groove to obtain a more secure bond. Optionally, since the depth of at least some of the second grooves 230 gradually increases from the center of the distal surface 220 toward the edge of the distal surface 220, the biocompatible adhesive will start to fill the groove from the shallower part of the groove and gradually discharge the air to the deeper part of the groove. Further, since the shallower part is located at the center of the distal surface 220 and the deeper part is located at the edge of the distal surface 220, the air will be discharged from the center of the distal surface 220 to the edge of the distal surface 220, and finally discharged from the edge of the distal surface 220 to the outside. This further promotes the discharge of air in the groove, thereby further ensuring that a secure bond is achieved.

[0055] It is worth noting that those skilled in the art will understand that the above limitations on various shapes, sizes, arrangements, etc. of the second groove 230 are obviously also applicable to the first groove 130, and therefore, applying the limitations on various shapes, sizes, arrangements, etc. of the second groove 230 to the first groove 130 is obviously also included in the scope of the present invention.

[0056] refer to Figure 4-5C According to a feasible embodiment of the present invention, the intermediate layer 300 includes at least one shim 310, and the shim proximal surface 311 and the shim distal surface 312 of each shim 310, which are opposite to each other, are in contact with the biocompatible adhesive, and the shims 310 are configured so that the number thereof can be adjusted according to the size of the patient's knee joint to be replaced. In particular, the thickness of the shim 310 is less than the height of the narrowest part of the first side surface 140 of the tibial tray 100 and also less than the height of the narrowest part of the second side surface 240 of the tibial liner 200, the first side surface 140 connects the distal bone bonding surface 110 to the proximal surface 120, and the second side surface 240 connects the distal surface 220 to the proximal articular surface 210.

[0057] According to the above technical solution, since the number of gaskets 310 and thus the height of the tibial prosthesis of the present invention can be adjusted according to the size of the patient's knee joint to be replaced, no matter what the size of the patient's knee joint to be replaced is, or in other words, no matter what the degree of osteotomy of the patient during surgery is, the tibial prosthesis of the present invention can be properly implanted in the patient's body, thereby helping the patient to recover the knee joint function. In addition, according to the above technical solution, the height of the tibial prosthesis can be adjusted in a step-by-step manner (or in other words, quickly adjusted in a large range) by adjusting the number of gaskets 310, and the height of the tibial prosthesis can be fine-tuned (or in other words, continuously adjusted) by adjusting the amount of biocompatible adhesive. Therefore, by using the gasket 310 in combination with the biocompatible adhesive, the height of the tibial prosthesis can be adjusted in a large range, quickly and continuously, so that for any patient's knee joint size and any degree of osteotomy, the tibial prosthesis of the present invention can be suitable for implantation in the patient's body, thereby helping the patient to recover the knee joint function.

[0058] refer to Figure 5A-Figure 5C According to a feasible embodiment of the present invention, each gasket 310 includes: a plurality of third grooves 313 recessed from its gasket proximal surface 311 for receiving the biocompatible adhesive; and a plurality of fourth grooves 314 recessed from its gasket distal surface 312 for receiving the biocompatible adhesive.

[0059] According to the above technical solution, due to the presence of the third groove 313 and the fourth groove 314, the contact area between the biocompatible adhesive and the gasket 310 is significantly increased, which enables the gasket 310 to be more firmly bonded to the tibial prosthesis, thereby effectively eliminating micro-motion and extending the service life of the tibial prosthesis.

[0060] refer to Figure 5C According to a feasible embodiment of the present invention, the gasket proximal surface 311 includes a gasket proximal inclined surface 315 inclined relative to the proximal-distal direction PD at its edge, and the gasket distal surface 312 includes a gasket distal inclined surface 316 inclined relative to the proximal-distal direction PD at its edge, wherein the gasket proximal inclined surface 315 is suitable for fitting with the distal inclined surface 221, and the gasket distal inclined surface 316 is suitable for fitting with the proximal inclined surface 121.

[0061] According to the above technical solution, when the tibial prosthesis of the present invention is assembled, since the proximal inclined surface 121, the distal inclined surface 221 and the proximal inclined surface 315 and the distal inclined surface 316 of each gasket 310 can fit each other, it is easier to position the tibial tray 100, each gasket 310 and the tibial pad 200 relative to each other, and the biocompatible adhesive can be prevented from escaping.

[0062] It is worth noting that those skilled in the art will understand that the above limitations on various shapes, sizes, arrangements, etc. of the first groove 130 and the second groove 230 are obviously also applicable to the third groove 313 and the fourth groove 314. Therefore, applying the limitations on various shapes, sizes, arrangements, etc. of the first groove 130 and the second groove 230 to the third groove 313 and the fourth groove 314 is obviously also included in the scope of the present invention.

[0063] In addition, the present invention also relates to a knee joint prosthesis, which is configured to replace a patient's knee joint during a surgical operation and to realize the knee joint function as the patient's knee joint in daily life after the operation. The knee joint prosthesis includes: a femoral prosthesis, which is configured to replace the distal end of the femur of the patient's knee joint and to realize the knee joint function as the distal end of the femur of the patient in daily life after the operation; and the above-mentioned tibial prosthesis that cooperates with the femoral prosthesis.

[0064] The preferred but non-limiting embodiments of the tibial prosthesis according to the present invention and the knee prosthesis including the same are described in detail above with the aid of the accompanying drawings. For those of ordinary skill in the art, modifications and additions to the technology and structure should obviously be considered to be included within the scope of the present invention without departing from the scope and essence of the present disclosure as set forth in the following claims. Therefore, these modifications and additions that can be conceived under the teachings of the present invention should be considered as part of the present disclosure. The scope of the present disclosure is defined by the claims attached below, and includes equivalent technologies known at the filing date of the present disclosure and equivalent technologies that have not yet been foreseen.

Claims

1. A tibial prosthesis configured to replace the proximal tibia of a patient during surgery and to realize knee joint function as the proximal tibia of the patient in daily life after surgery, the tibial prosthesis comprising: A tibial tray (100) configured to be fixed to a patient's tibia at its distal osteosynthesis surface (110); A tibial liner (200) comprising a proximal articular surface (210) for mating with a patient's femur or a femoral prosthesis; as well as An intermediate layer (300) disposed between the tibial tray (100) and the tibial liner (200); The intermediate layer (300) is bonded to the proximal surface (120) of the tibial tray (100) and the distal surface (220) of the tibial pad (200) by a biocompatible adhesive. The tibial tray (100) includes a plurality of first grooves (130) recessed from its proximal surface (120) for receiving the biocompatible adhesive, and the tibial pad (200) includes a plurality of second grooves (230) recessed from its distal surface (220) for receiving the biocompatible adhesive, at least some of the plurality of first grooves (130) extend from the proximal surface (120) to the distal osteosynthesis surface (110), and the geometry of at least some of the plurality of second grooves (230) is configured so that the width thereof at the distal surface (220) is smaller than the maximum width thereof; and the geometry of at least some of the plurality of first grooves (130) is configured so that the width thereof at the proximal surface (120) is smaller than the maximum width thereof, and The intermediate layer (300) includes at least one gasket (310), and the gasket proximal surface (311) and the gasket distal surface (312) of each gasket (310) that are opposite to each other are in contact with the biocompatible adhesive, and the gaskets (310) are configured so that their number can be adjusted according to the size of the patient's knee joint to be replaced.

2. The tibial prosthesis according to claim 1, wherein: The proximal surface (120) includes a proximal inclined surface (121) inclined relative to the proximal direction (PD) at its edge, and the distal surface (220) includes a distal inclined surface (221) inclined relative to the proximal direction (PD) at its edge, wherein the proximal inclined surface (121) and the distal inclined surface (221) are suitable for fitting each other.

3. The tibial prosthesis according to claim 1, wherein: The plurality of second grooves (230) include at least one second main groove (231) and a plurality of second auxiliary grooves (232) connected to the second main groove (231), wherein the width of the second main groove (231) is at least twice the width of the second auxiliary groove (232).

4. The tibial prosthesis according to claim 1, wherein: At least some of the plurality of second grooves (230) open to the exterior of the tibial liner (200) in a direction transverse to the proximal-distal direction (PD).

5. The tibial prosthesis according to claim 1, wherein: The geometry of at least some of the plurality of second grooves (230) is configured such that, as they extend from the center of the distal surface (220) toward the edge of the distal surface (220), their depth gradually increases.

6. The tibial prosthesis according to claim 1, wherein: Each gasket (310) includes: a plurality of third grooves (313) recessed from its gasket proximal surface (311) for receiving the biocompatible adhesive; and a plurality of fourth grooves (314) recessed from its gasket distal surface (312) for receiving the biocompatible adhesive.

7. A knee joint prosthesis, which is configured to replace a patient's knee joint during surgery and to realize knee joint functions as the patient's knee joint in daily life after surgery, and comprises: A femoral prosthesis, which is configured to replace the distal femur of a patient and realize knee joint function as the distal femur of the patient in daily life after surgery; and a tibial prosthesis according to one of claims 1-6 that cooperates with the femoral prosthesis.

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