JP6557459B2 - Total knee implant - Google Patents

Description

  The present invention relates to an artificial knee joint implant including a tibial implant.

  Examples of conventionally known artificial knee joint implants include those disclosed in Patent Document 1. In this artificial knee joint implant, a rear end sliding surface provided as a chamfered portion at the rear end of the sliding surface of the tibial plate (tibial side implant) on which the femoral component (femoral side implant) slides. (Back side inclined surface) is formed. As a result, it is possible to prevent the posterior condyles of the femur from interfering with the rear end of the sliding surface of the tibial implant during flexion of the knee joint, thus allowing physiological operation of the knee joint. it can.

JP 2010-188051 A

  In normal knee joints, it has been confirmed that the tibia internally rotates with respect to the femur during extension-flexion. The artificial knee joint implant is desirably designed to allow this physiological movement. Even when the posterior inclined surface is formed on the tibial implant as described above, the physiological motion of the knee joint may not be allowed.

  The present invention is to solve the above-described problems, and an object of the present invention is to allow a knee joint to perform a physiological operation when an artificial knee joint implant is installed.

  (1) An artificial knee joint implant according to an aspect of the present invention for achieving the above object is an artificial knee joint implant including a tibial implant, and the femoral implant is slid on the tibial implant. A sliding surface that moves, an installation surface that is installed on the tibia, and both sides of the human body in the left-right direction provided between the sliding surface and the installation surface, and the tibial implant is installed on the human body A side surface extending in the front-rear direction of the human body, and a rear end portion of the outer peripheral edge portion of the sliding surface in a state where the tibial implant is installed on the human body, to the rear side with respect to the sliding surface A posterior inclined surface that extends obliquely downward, and a posterior side in the front-rear direction when the tibial implant is installed on the human body so as to be inclined with respect to the sliding surface and the side surface. Is, downward from the outer periphery of the sliding surface, and the right and left direction of the at least one side, extending laterally side inclined surface, is formed. In addition, in this specification, an inclined surface may be described as a chamfer surface.

  In this configuration, the femoral side implant slides with respect to the sliding surface of the tibial implant in a state where the installation surface is installed on the tibia. According to this configuration, since the posterior inclined surface is formed, the posterior condyle of the femur is located outside the sliding surface of the tibial implant when the artificial knee joint shifts from the extended state to the bent state. Interference with the rear end of the peripheral edge can be avoided.

  Further, this configuration also corresponds to the rotational motion of the knee joint when the knee prosthesis is bent and extended. Specifically, when the knee joint shifts from the extended state to the bent state, the tibia rotates inward with respect to the femur. At this time, according to this configuration, since the side inclined surface is formed, the posterior femoral condyle is turned into the tibial implant during the rotation of the distal end of the femur when transitioning from the extended state to the bent state. Interference with the inner portion of the outer peripheral edge of the sliding surface can be avoided.

  Therefore, in this configuration, it is possible to allow the knee joint at the time of installing the artificial knee joint implant to perform a physiological operation.

  (2) Preferably, the said back side inclined surface and the said side side inclined surface are flat surfaces from which the angle with respect to the said installation surface differs mutually. In this structure, a back side inclined surface and a side side inclined surface can be comprised by the flat surface which is a comparatively easy shape.

  (3) Preferably, the side inclined surface has a curved surface extending curvedly from the rear inclined surface toward the side surface. According to this configuration, the side inclined surface can be formed into a smooth curved surface.

  (4) Preferably, the said back side inclined surface and the said side side inclined surface are formed so that a ridgeline may not be formed between this back side inclined surface and this side side inclined surface.

  In this configuration, there is no ridge line between the rear side inclined surface and the side side inclined surface, and both are smoothly connected. In this case, for example, compared with the case where a ridge line exists between the rear side inclined surface and the side side inclined surface, there is a risk that the part is damaged due to stress concentration on the part near the ridge line. Can be reduced.

  (5) Preferably, the said side inclined surface is provided in the both sides of the said left-right direction.

  The rotation direction (clockwise direction or counterclockwise direction) of the distal end of the femur when the knee joint is bent differs between when the artificial knee joint implant is applied to the right knee and when it is applied to the left knee. On the other hand, according to this configuration, since the side inclined surfaces are provided on both sides in the left-right direction, an artificial knee joint implant that can be applied to both the right knee and the left knee can be provided.

  ADVANTAGE OF THE INVENTION According to this invention, it can accept | permit that the knee joint at the time of artificial knee joint implant installation performs physiological operation | movement.

It is the perspective view of the tibial side implant of the artificial knee joint implant which concerns on embodiment of this invention, Comprising: (A) is the figure seen from the back side, (B) is the figure seen from the front side. It is a top view of the tibial implant shown in FIG. It is a figure of the tibial implant shown in FIG. 1, (A) is a side view, (B) is a front view. It is the figure which looked at the artificial knee joint implant which concerns on embodiment of this invention from upper direction, Comprising: It is a figure which shows the artificial knee joint implant at the time of a bending state. It is the figure which looked at the artificial knee joint implant shown in FIG. 4 from the arrow V direction. FIG. 6 is an enlarged view of a part of FIG. 5. It is the perspective view of the tibial side implant of the artificial knee joint implant which concerns on a modification, Comprising: (A) is the figure seen from the back side, (B) is the figure seen from the front side. FIG. 8 is a plan view of the tibial implant shown in FIG. 7. It is a figure of the tibial side implant shown in FIG. 7, Comprising: (A) is a side view, (B) is a front view. It is a figure which shows the tibial side implant of the artificial knee joint implant which concerns on a modification, Comprising: (A) is a perspective view, (B) is a side view. It is a figure which shows the tibial side implant of the artificial knee joint implant which concerns on a modification, Comprising: (A) is a perspective view, (B) is a side view.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The present invention can be widely applied to an artificial knee joint implant including a femoral side implant and a tibial side implant.

  FIG. 1 is a perspective view of a tibial implant 10 of an artificial knee joint implant 1 according to an embodiment of the present invention, where (A) is a view from the rear side, and (B) is a view from the front side. It is. FIG. 2 is a plan view of the tibial implant 10 shown in FIG. 3 is a view of the tibial implant 10 shown in FIG. 1, in which (A) is a side view and (B) is a front view. The artificial knee joint implant 1 is used in an operation for replacing a patient's knee joint with an artificial knee joint. For example, the knee joint implant 1 is used for a patient whose knee joint is highly deformed due to knee osteoarthritis or rheumatoid arthritis. Used to restore normal function. In the present embodiment, a so-called PS (Posterior Stabilizing) type artificial knee joint implant will be described as an example.

  In each figure described below, for convenience of explanation, the direction indicated by the arrow indicated above is indicated as upper or upper, the direction indicated by the arrow indicated as lower is indicated as lower or lower, and the front. The direction indicated by the arrow indicates the direction indicated by the front or front, the direction indicated by the arrow indicated as rear, the rear or rear, the direction indicated by the arrow indicated as right, the direction indicated by the arrow indicated as right and left Called the left side. Further, the upper side in each figure is the proximal side in the human body, the lower side in each figure is the distal side in the human body, the front side in each figure is the front side of the human body, and the rear side in each figure is the rear side of the human body. is there.

  The tibial implant 10 is an implant that is fixed to the proximal end of the tibia, and is an implant that is a sliding target of the femoral side implant that is fixed to the distal end of the femur when attached to the proximal end of the tibia. It is. As shown in FIGS. 1 and 2, the tibial implant 10 includes a plate portion 11 and a post 28, which are integrally formed.

  The post 28 is provided so as to protrude upward from the plate portion 11. In the artificial knee joint implant 1 according to the present embodiment, when the knee flexion angle is equal to or larger than a predetermined angle, the post 28 comes into contact with the cam (not shown) of the femoral side implant, thereby causing the knee flexion motion. It is configured to guide.

  The plate part 11 is formed in a plate shape having a predetermined thickness, and has a substantially elliptical shape whose shape viewed from above is long in the left-right direction. A recessed portion 11 a that is recessed forward is formed in the center portion in the left-right direction behind the plate portion 11.

  Further, the plate part 11 is provided with an installation surface 12, sliding surfaces 13R and 13L, and an outer peripheral surface 14.

  The installation surface 12 is a flat surface formed on the lower surface of the plate portion 11. The installation surface 12 is installed and fixed at the proximal end of the tibia.

  The sliding surfaces 13 </ b> R and 13 </ b> L are surfaces formed on the left and right sides of the upper surface of the plate portion 11. The sliding surface 13R is formed on the right side of the plate portion 11, and the sliding surface 13L is formed on the left side of the plate portion 11. Each sliding surface 13R, 13L is formed in a concave shape that is recessed downward. Thereby, the femoral-side implant that swells downward while being fixed to the distal end of the femur slides smoothly on the sliding surfaces 13R and 13L.

  The outer peripheral surface 14 is a wall surface extending in the vertical direction between the installation surface 12 and the sliding surfaces 13R and 13L, and is formed in an annular shape when viewed from above. The front side portion of the outer peripheral surface 14 is provided as a front surface 15, and the left and right side portions of the outer peripheral surface 14 are provided as side surfaces 16R and 16L (right side surface 16R and left side surface 16L), respectively. This portion is provided as the rear surface 17.

  The plate portion 11 includes a right chamfer surface 20R extending from the rear right portion of the plate portion 11 toward the right side surface 16R, and a rear left portion of the plate portion 11 toward the left side surface 16L. An extended left chamfer surface 20L is formed.

  The right chamfer surface 20R is constituted by a rear chamfer surface 18R and a side chamfer surface 19R.

  The rear chamfer surface 18R is a rear side portion of the right chamfer surface 20R, and is formed between the rear end portion of the outer peripheral edge portion of the sliding surface 13R and the upper end portion of the rear surface 17. It is a chamfer-like part. Accordingly, the rear chamfer surface 18R is formed to extend obliquely downward from the rear end portion of the outer peripheral edge portion of the sliding surface 13R toward the upper end portion of the rear surface 17.

  The side chamfer surface 19R is a right side portion of the right chamfer surface 20R, and is between the right side portion of the outer peripheral edge portion of the sliding surface 13R and the upper end portion of the right side surface 16R. It is a formed chamfer-like part. Accordingly, the side chamfer surface 19R is formed to extend obliquely downward from the right side portion of the outer peripheral edge portion of the sliding surface 13R toward the upper end portion of the right side surface 16R. The side chamfer surface 19R is inclined with respect to both the sliding surface 13R and the right side surface 16R. Further, the side chamfer surface 19R is formed in a curved shape extending curvedly from the rear chamfer surface 18R toward the right side surface 16R. Further, the right chamfer surface 20R is formed continuously and smoothly from the right rear to the right side. Thereby, no ridge line is formed between the rear chamfer surface 18R and the side chamfer surface 19R.

  The left chamfer surface 20L is configured by a rear chamfer surface 18L and a side chamfer surface 19L.

  The rear chamfer surface 18L is a rear portion of the left chamfer surface 20L, and is formed between the rear end portion of the outer peripheral edge portion of the sliding surface 13L and the upper end portion of the rear surface 17. It is a chamfer-like part. Accordingly, the rear chamfer surface 18L is formed to extend obliquely downward from the rear end portion of the outer peripheral edge portion of the sliding surface 13L toward the upper end portion of the rear surface 17.

  The side chamfer surface 19L is a left side portion of the left chamfer surface 20L, and is between the left side portion of the outer peripheral edge of the sliding surface 13L and the upper end portion of the left side surface 16L. It is a formed chamfer-like part. Thereby, the side chamfer surface 19L is formed so as to extend obliquely downward from the left side portion of the outer peripheral edge portion of the sliding surface 13L toward the upper end portion of the left side surface 16L. The side chamfer surface 19L is inclined with respect to both the sliding surface 13L and the left side surface 16L. Further, the side chamfer surface 19L is formed in a curved surface extending curvedly from the rear chamfer surface 18L toward the left side surface 16L. Further, the left chamfer surface 20L is formed smoothly smoothly from the left rear side to the left side. Thereby, no ridge line is formed between the rear chamfer surface 18L and the side chamfer surface 19L.

  By forming the rear chamfer surfaces 18R and 18L as described above, the shape between the sliding surfaces 13R and 13L and the rear surface 17 is chamfered. Thereby, a convex part (for example, about 90 degrees) having a relatively narrow angle is not formed at a portion between each of the sliding surfaces 13R, 13L and the rear surface 17.

  In addition, between each back side chamfer surface 18R, 18L and each sliding surface 13R, 13L, and between each back side chamfer surface 18R, 18L and the rear surface 17, it connects each surface gently. The part is formed. Thereby, compared with the case where the space | interval between each surface mentioned above is formed in square shape, the risk that the said part breaks can be reduced.

  Further, by forming the side chamfer surfaces 19R and 19L as described above, the shape between the sliding surfaces 13R and 13L and the side surfaces 16R and 16L is chamfered. Thereby, a relatively narrow convex portion (for example, about 90 degrees) is not formed at a portion between the sliding surfaces 13R, 13L and the side surfaces 16R, 16L.

  In addition, between each side chamfer surface 19R, 19L and each sliding surface 13R, 13L and between each side chamfer surface 19R, 19L and each side surface 16R, 16L, each surface An R portion that gently connects the two is formed. Thereby, compared with the case where the space | interval between each surface mentioned above is formed in square shape, the risk that the said part breaks can be reduced.

[Operation of the artificial knee joint implant from the extended state to the bent state]
FIG. 4 is a view of the artificial knee joint implant 1 according to the embodiment of the present invention as viewed from above, and shows the artificial knee joint implant 1 in a bent state. FIG. 5 is a view of the artificial knee joint implant shown in FIG. FIG. 6 is an enlarged view of a part of FIG. In the following, FIGS. 4 to 6 show examples in which the artificial knee joint implant 1 is applied to the left knee.

  As in the case of the knee joint, as a general movement of the artificial knee joint implant 1, when the artificial knee joint implant 1 moves from the extended state to the bent state, a portion on the posterior side of the distal end 31 of the femur 30 (femur) The posterior condyles 32R and 32L) are close to the rear ends of the sliding surfaces 13R and 13L of the tibial implant 10. When the knee joint is bent further, conventionally, the femoral condyle and the rear end of the sliding surface of the tibial implant interfere with each other, and the knee joint operates physiologically when the artificial knee joint implant is installed. In some cases, it was not allowed to perform.

  On the other hand, in the artificial knee joint implant 1 according to the present embodiment, the rear chamfer surfaces 18R and 18L are provided on the rear portions of the sliding surfaces 13R and 13L of the tibial implant 10. That is, the portion of the tibial implant 10 that can interfere with the posterior condyle of the femur when the knee joint is greatly bent is removed by chamfering. In this way, the interference between the posterior femoral condyles 32R and 32L and the tibial implant 10 can be avoided, so that the knee joint when the artificial knee joint implant 1 is installed can be allowed to perform physiological operations. .

  Further, as a general movement of the artificial knee joint implant 1, when the artificial knee joint implant 1 moves from the extended state to the bent state, the tibial implant 10 is slightly rotated inward with respect to the femoral implant 2. Therefore, the femoral condyle 32R on the medial side (right side in the case of the present embodiment) is close to the medial portion of the outer peripheral edge of the sliding surface 13R of the tibial implant 10. When the knee joint is bent further greatly, in the conventional artificial knee joint implant, the rear femoral condyle 32R interferes with the inner side portion of the sliding surface of the tibial implant, and the artificial knee joint implant is installed. In some cases, physiological movement of the knee joint is not allowed.

  On the other hand, in the artificial knee joint implant 1 according to the present embodiment, the side chamfer surface 19R is provided on the inner side portion of the sliding surface 13R of the tibial implant 10. That is, the portion of the tibial implant 10 that can interfere with the posterior condyle of the femur when the knee joint is greatly bent is removed by chamfering. In this way, interference between the posterior femoral condyle 32R and the tibial implant 10 can be avoided, so that the knee joint when the artificial knee joint implant 1 is installed can be allowed to perform physiological operations.

[effect]
As described above, in the artificial knee joint implant 1 according to the present embodiment, the femoral side implant 2 slides on the sliding surfaces 13R and 13L of the tibial implant 10 in a state where the installation surface 12 is installed on the tibia. Move. According to this configuration, since the posterior chamfer surfaces 18R and 18L are formed, when the artificial knee joint shifts from the extended state to the bent state, the posterior femoral condyles 32R and 32L Interference with the rear end of the outer peripheral edge of the sliding surfaces 13R, 13L of the implant 10 can be avoided.

  Further, the artificial knee joint implant 1 also supports the rotational movement of the knee joint when the artificial knee joint is bent. Specifically, when the knee joint transitions from the extended state to the bent state, the tibia rotates inward with respect to the femur. At this time, according to the artificial knee joint implant 1, since the lateral chamfer surfaces 19R and 19L are formed, the femoral posterior condyles 32R and 32L are rotated at the time of rotation when transitioning from the extended state to the bent state. Interference with the inner side portion of the outer peripheral edge of the sliding surfaces 13R, 13L of the tibial implant 10 can be avoided.

  Therefore, according to the above-described configuration, it is possible to allow the knee joint at the time of installing the artificial knee joint implant 1 to perform a physiological operation.

  Further, according to the artificial knee joint implant 1, the side chamfer surfaces 19R and 19L are formed in a curved shape extending curvedly from the rear chamfer surfaces 18R and 18L toward the side surfaces 16R and 16L. Thereby, the side chamfer surfaces 19R and 19L can be formed in a smooth curved surface. For example, when the side chamfer surfaces 19R and 19L are formed by cutting, the curved surface shape can be obtained relatively easily by gradually inclining the rotation axis of the rotary blade with respect to the workpiece. it can.

  Further, according to the artificial knee joint implant 1, there is no ridge line between the rear chamfer surfaces 18R, 18L and the side chamfer surfaces 19R, 19L, and the two are smoothly connected. In this case, for example, compared to a case where a ridge line exists between the rear chamfer surface and the side chamfer surface, the portion is damaged due to stress concentration on a portion near the ridge line. Risk can be reduced. For example, the rear chamfer surfaces 18R and 18L and the side chamfer surfaces 19R and 19L can be continuously formed by cutting, so that the rear chamfer surface 18R can be formed in a relatively short time. , 18L and the side chamfer surfaces 19R, 19L can be formed.

  Further, according to the artificial knee joint implant 1, since the side chamfer surfaces 19R and 19L are formed on the left and right sides of the tibial implant 10, the artificial knee joint implant applicable to both the right knee and the left knee. 1 can be provided.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications are possible as long as they are described in the claims. For example, the following modifications may be made.

[Modification]
(1) FIG. 7 is a perspective view of a tibial implant 10a of an artificial knee joint implant according to a modification, where (A) is a view from the rear side, and (B) is a view from the front side. is there. FIG. 8 is a plan view of the tibial implant 10a shown in FIG. 9 is a view of the tibial implant 10a shown in FIG. 7, where (A) is a side view and (B) is a front view. Compared with the tibial implant 10 according to the above-described embodiment, the tibial implant 10a of the present modification is different in the shapes of the posterior chamfer surface and the side chamfer surface. Below, a different part from the said embodiment is mainly demonstrated, and description is abbreviate | omitted about another part.

  Unlike the rear chamfer surfaces 18R and 18L of the above-described embodiment, the rear chamfer surfaces 21R and 21L of the present modification are formed flat.

  The rear chamfer surfaces 21R and 21L are formed corresponding to the sliding surfaces 13R and 13L. The right rear chamfer surface 21 </ b> R is a chamfer-like portion formed between the rear end portion of the outer peripheral edge portion of the sliding surface 13 </ b> R and the upper end portion of the rear surface 17. Accordingly, the rear chamfer surface 21R is formed to extend obliquely downward from the rear end portion of the outer peripheral edge portion of the sliding surface 13R toward the upper end portion of the rear surface 17.

  Similarly, the left rear chamfer surface 21 </ b> L is a chamfer-shaped portion formed between the rear end portion of the outer peripheral edge portion of the sliding surface 13 </ b> L and the upper end portion of the rear surface 17. Accordingly, the rear chamfer surface 21L is formed to extend obliquely downward from the rear end portion of the outer peripheral edge portion of the sliding surface 13L toward the upper end portion of the rear surface 17.

  Further, the side chamfer surfaces 22R and 22L of the present modification are formed flat like the rear chamfer surfaces 21R and 21L of the present modification. The side chamfer surface 22R is a chamfer-like portion formed between the right side portion of the outer peripheral edge portion of the sliding surface 13R and the upper end portion of the right side surface 16R, as in the above embodiment. is there. Accordingly, the side chamfer surface 22R is formed to extend obliquely downward from the right side portion of the outer peripheral edge portion of the sliding surface 13R toward the upper end portion of the right side surface 16R. The side chamfer surface 22R is inclined with respect to both the sliding surface 13R and the right side surface 16R. An R portion 23R, which is a portion formed in an R shape, is formed between the side chamfer surface 22R and the rear chamfer surface 21R. Accordingly, the side chamfer surface 22R and the rear chamfer surface 21R are smoothly connected. Further, the angle of the side chamfer surface 22R with respect to the installation surface 12 is different from the angle of the rear side chamfer surface 21R with respect to the installation surface 12.

  The side chamfer surface 22L is a chamfer-like portion formed between the left side portion of the outer peripheral edge portion of the sliding surface 13L and the upper end portion of the left side surface 16L, as in the above embodiment. is there. Thereby, the side chamfer surface 22L is formed so as to extend obliquely downward from the left portion of the outer peripheral edge portion of the sliding surface 13L toward the upper end portion of the left side surface 16L. The side chamfer surface 22L is inclined with respect to both the sliding surface 13L and the left side surface 16L. An R portion 23L, which is a portion formed in an R shape, is formed between the side chamfer surface 22L and the rear chamfer surface 21L. Accordingly, the side chamfer surface 22L and the rear chamfer surface 21L are smoothly connected. Further, the angle of the side chamfer surface 22L with respect to the installation surface 12 is different from the angle of the rear side chamfer surface 21L with respect to the installation surface 12.

  As described above, even in the shape of the side chamfer surfaces 22R and 22L of the tibial implant 10a of the artificial knee joint implant according to the present modification, the posterior femoral condyle and the tibia are the same as in the above embodiment. Interference with the side implant can be avoided. Thereby, like the case of the said embodiment, it can accept | permit that the knee joint at the time of artificial knee joint implant installation performs physiological operation | movement.

  Moreover, according to the artificial knee joint implant which concerns on this modification, back side chamfer surface 21R, 21L and side chamfer surface 22R, 22L can be comprised by the flat surface which is a comparatively easy shape. .

  (2) In the above embodiment, no ridge line is formed between the rear chamfer surfaces 18R, 18L and the side chamfer surfaces 19R, 19L. A ridgeline may be formed between 18L and the side chamfer surfaces 19R, 19L.

  (3) In the above embodiment, the PS type artificial knee joint has been described as an example of application of the present invention. However, the present invention is not limited to this, and can be applied to other types of artificial knee joints. Specifically, for example, as shown in FIG. 10, it can also be applied to a tibial implant 10b of a CR (Cruciate Retaining) type artificial knee joint, and further, as shown in FIG. 11, CCK (Constrained Condylar Knee). It can also be applied to the tibial implant 10c of a knee prosthesis.

  The present invention can be widely applied to artificial knee joint implants.

DESCRIPTION OF SYMBOLS 1 Artificial knee joint implant 2 Femoral side implant 10, 10a, 10b, 10c Tibial side implant 12 Installation surface 13R, 13L Sliding surface 16R, 16L Side surface 18R, 18L, 21R, 21L Back side chamfer surface (back side inclined surface) )
19R, 19L, 22R, 22L Side chamfer surface (side inclined surface)

Claims (5)

An artificial knee joint implant comprising a tibial implant,
In the tibial implant,
A sliding surface on which the femoral implant slides;
An installation surface to be installed on the tibia;
A side surface provided between the sliding surface and the installation surface, and extending along the front-rear direction of the human body on both sides in the left-right direction of the human body in a state where the tibial implant is installed on the human body;
A rear inclined surface extending obliquely downward toward the rear side with respect to the sliding surface from a rear end portion of the outer peripheral edge portion of the sliding surface in a state where the tibial implant is installed in the human body;
The tibial implant is provided on the rear side in the front-rear direction in a state of being installed on the human body so as to be inclined with respect to the sliding surface and the side surface, and the front-rear direction in the outer peripheral edge portion of the sliding surface A laterally inclined surface extending from the rear side portion downward from the outer peripheral edge of the sliding surface and toward at least the inner side in the left-right direction;
An artificial knee joint implant characterized in that is formed. The artificial knee joint implant according to claim 1,
The artificial knee joint implant according to claim 1, wherein the posterior inclined surface and the lateral inclined surface are flat surfaces having different angles with respect to the installation surface. The artificial knee joint implant according to claim 1,
The artificial knee joint implant according to claim 1, wherein the side inclined surface has a curved surface extending from the rear inclined surface toward the side surface. The artificial knee joint implant according to claim 1 or 3,
The artificial knee joint implant, wherein the posterior inclined surface and the lateral inclined surface are formed so that no ridge line is formed between the posterior inclined surface and the lateral inclined surface. . In the artificial knee joint implant according to any one of claims 1 to 4,
The artificial knee joint implant according to claim 1, wherein the side inclined surfaces are provided on both sides in the left-right direction.

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