WO2009088238A2 - Articulation artificielle du genou destinée à empêcher les blessures du ligament - Google Patents

Articulation artificielle du genou destinée à empêcher les blessures du ligament Download PDF

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Publication number
WO2009088238A2
WO2009088238A2 PCT/KR2009/000104 KR2009000104W WO2009088238A2 WO 2009088238 A2 WO2009088238 A2 WO 2009088238A2 KR 2009000104 W KR2009000104 W KR 2009000104W WO 2009088238 A2 WO2009088238 A2 WO 2009088238A2
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WO
WIPO (PCT)
Prior art keywords
femur
ligament
knee joint
coupling member
joint
Prior art date
Application number
PCT/KR2009/000104
Other languages
English (en)
Korean (ko)
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WO2009088238A3 (fr
WO2009088238A4 (fr
Inventor
Doo-Hoon Sun
Yong-Sik Kim
Jung-Sung Kim
Byung-Soo Kim
Jai-Gon Seo
Woo-Shin Cho
Hyun-Kee Chung
Myung-Chul Lee
Original Assignee
Corentec Inc.
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Publication date
Application filed by Corentec Inc. filed Critical Corentec Inc.
Publication of WO2009088238A2 publication Critical patent/WO2009088238A2/fr
Publication of WO2009088238A3 publication Critical patent/WO2009088238A3/fr
Publication of WO2009088238A4 publication Critical patent/WO2009088238A4/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/38—Joints for elbows or knees
    • A61F2/3886—Joints for elbows or knees for stabilising knees against anterior or lateral dislocations
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/38—Joints for elbows or knees
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/38—Joints for elbows or knees
    • A61F2/389—Tibial components

Definitions

  • the present invention relates to an artificial knee joint that can replace the knee joint, and more particularly, the femur coupling member coupled to the tibia side end of the femur, the tibia coupling member coupled to the femur side end of the tibia, and the femur coupling member
  • the artificial knee joint consisting of a bearing member positioned between the tibial coupling member, in order to prevent ligament damage when there is a movement of the knee, a chamfer is formed at the end of the posterior condyle of the femoral coupling member. It relates to an artificial knee joint that can prevent the femur coupling member from damaging the ligament due to twisting rotation and the like.
  • the artificial knee joint of the present invention is performed in the CR type when the artificial knee joint maintains the posterior cruciate ligament, in which case there is a risk of damaging the posterior cruciate ligament according to the twisting rotation of the femoral coupling member. It is possible to prevent this by forming a separate chamfer on the inside, and also to prevent the ligament damage by forming a chamfer on the rear protrusion in the bearing member to prevent the ligaments from colliding.
  • the knee joint is the joint site between the tibia and the femur, and an increasing number of patients are in an unrecoverable state due to wear and tear of the knee joint and aging and accidents.
  • the knee joint is a knee joint that is a joint between the lower part of the femur, the upper tibia and the back of the patella (knee bone), which functions to bend the leg backward from the knee.
  • the back of the patella is covered with cartilage of 4mm to 6mm thickness, which stretches the knee of the quadriceps, moving up and down the joint surface of the distal tip of the thigh (femur) during bending and blooming. Improves strength
  • the pressure on the patella-femoral joint when walking on flat lands is half the weight, and three times the weight when climbing stairs and eight times the weight when squatting and rising.
  • the articular capsule begins at the edge of the lower femur and attaches to the top of the tibia.
  • the joints are strengthened at the same time as the joints are strengthened by the strong ligaments including the medial and lateral collateral ligaments and the cruciate ligaments in the articular capsule.
  • joint meniscus When looking at the symptoms of joint meniscus cartilage damage of the knee joint, joint meniscus is cartilage tissue located between the femur and the tibia that make up the knee joint, located between the joint cartilage to cushion the impact of the knee joint and to provide nutrients to the joint cartilage. Supplying, providing stability of the joints, and at the same time smoothing the movement of the knee joint, and serves to transmit weight load.
  • the joint meniscus is composed of medial meniscus and lateral meniscus.
  • medial meniscus is more damaged than the outside and is less likely to move, resulting in greater damage to the medial meniscus.
  • Meniscus injuries are one of the most common injuries to the knee joints, and are often caused by sports, mountain climbing or everyday injuries.
  • rotational movement When the rotational movement is applied in a state where the knee is bent, that is, when the torsional force is generated in the knee joint, it may be accompanied by damage of the cruciate ligament, the collateral ligament, the tibia, and the like when a severe external force is applied.
  • the cause of the disease is the structural and functional abnormalities of the patella-femoral joint. If the leg is abnormally outward or the foot is turned outwardly, excessive force is applied to the patella-femoral joint repeatedly, which can lead to softening of the articular cartilage, even if the knee joint is not used for a long time. Can occur due to construction. If there is structural abnormality in the patella-femoral joint, a brace to stabilize the patella may be worn, and if the injury is severe, surgical treatment may be performed to replace the artificial knee joint.
  • the artificial knee joint is divided into a femur portion and a tibia portion, and a bearing portion corresponding to cartilage between the femur portion and the tibia portion.
  • the femur and tibia are mainly metal alloys, and the cartilage is made of polyethylene.
  • the tibial part is fixed by an insertion part inserted into the knee joint end of the tibia. The insert is secured by the bone marrow of the tibia.
  • the conventional artificial knee joint As shown in the conventional artificial knee joint of FIG. 1, first, a part of the tibia side of the femur 1 is cut and the femoral coupling member 10 is coupled and fixed, and then the tibia 3 A portion of the femoral side is cut and the tibial coupling member 30 is fixed to the site. Next, the bearing member 50 is positioned between the contact portion 13 of the femur coupling member 10 and the groove portion 51 positioned on the upper surface of the bearing member 50 so that the bending motion of the knee joint is increased. Make it possible.
  • the conventional artificial knee joint coupled as described above as shown in the elevation view in FIG.
  • the femoral coupling member 10 is capable of movement only in the front-rear direction during the bending motion on the upper surface of the bearing member 50. no. That is, the knee joint of the actual human body does not only perform the forward and backward movement of the tibia, but slightly twists the rotation. Accordingly, when the artificial knee joint is performed, the bearing member (the bearing member 50 at the contact surface of the femur coupling member 10) 50) Rotation in the plane of the upper surface occurs. Due to this planar twisting rotation, the tip of the posterior condyle of the femoral coupling member 10 collides with the ligaments existing on the side, and may eventually damage the ligaments.
  • CR type and PS type surgery where CR type is a type of artificial knee joint when the posterior cruciate ligament is not removed and PS type is a posterior cruciate ligament.
  • PS type is a posterior cruciate ligament.
  • the PS type artificial knee joint replaces the posterior cruciate ligament removed by the cam of the bearing member and the femur coupling member, there is no fear of damage of the posterior cruciate ligament in the center, but the CR
  • the artificial knee joint of the type the artificial knee joint is operated while maintaining the posterior cruciate ligament, so that the femoral joint member is twisted on the upper surface of the bearing member by the inner edge of the posterior joint end of the femur joint member.
  • the posterior cruciate ligament may be damaged.
  • the posterior ligament with the posterior protrusion of the bearing member collides because there is a slight forward bending when the knee is fully extended The case occurs.
  • the posterior ligaments may be damaged, accompanied by pain, and seriously cause disease due to inflammation.
  • the present invention has been made to solve the problems of the prior art, an object of the present invention, the side ligament collision by the horizontal axis of the femoral coupling member by the outer edge of the femur coupling member in the conventional artificial knee joint Since the ligament is damaged, the artificial knee joint of the present invention includes an outer chamfer at the outer edge of the posterior joint end of the femoral coupling member, thereby preventing ligament injury by preventing the collision with the side ligament. To provide an artificial knee joint.
  • Another object of the present invention there is a problem that the posterior cruciate ligament existing in the inner side of the artificial knee joint of the conventional CR type collides with the inner edge of the femoral coupling member in accordance with the transverse rotation of the femoral joint member, the ligament is damaged, It is to provide an artificial knee joint to prevent damage to the ligament by preventing the collision with the posterior cruciate ligament by including an inner chamfer in the inner edge of the posterior joint end of the femur coupling member.
  • Another object of the present invention is that, in the conventional artificial knee joint, when the knee joint is fully extended, there is a case in which the posterior ligament collides with the posterior protrusion of the bearing member and the ligament is damaged. It is to provide an artificial knee joint to prevent the ligament damage by including a rear chamfer to the rear projection of the bearing member to prevent that.
  • Still another object of the present invention is that in a conventional artificial knee joint, pain caused by collision with the ligaments and seriously inflamed, causing the disease, in order to prevent this, chamfering the femoral coupling member and the bearing member It is to provide a more stable artificial knee joint.
  • the present invention will be implemented by the embodiment having the following configuration in order to achieve the above object, and includes the following configuration.
  • the artificial knee joint according to the present invention is a femur coupling member coupled to the distal end of the femur, a tibia coupling member coupled to the distal end of the tibia, and between the femur coupling member and the tibia coupling member
  • the femoral coupling member includes an outer chamfer chamfered at the outer edge of its posterior joint end to prevent collision with the lateral ligaments so as to prevent ligament damage. It features.
  • the artificial knee joint according to the present invention the femoral joint member further comprises an inner chamfer chamfered at the inner edge of the posterior joint end ligament injury by preventing collision with the posterior cruciate ligament It is characterized in that to prevent the.
  • the artificial knee joint according to the present invention is characterized in that the outer chamfer is chamfered into a smooth convex curved shape.
  • the artificial knee joint according to the present invention is characterized in that the inner chamfer is chamfered into a smooth concave curved shape which is recessed inwardly.
  • the artificial knee joint according to the present invention, the bearing member includes a rear projection protruding upward from the rear, the rear projection includes a rear chamfer formed by chamfering downward to a certain depth;
  • the rear chamfer is characterized in that it can prevent the collision with the ligaments.
  • the artificial knee joint according to the present invention is characterized in that the rear chamfer is chamfered into a smooth curved shape recessed.
  • the artificial knee joint according to the present invention is chamfered in a smooth convex curved shape at the outer edge of the posterior joint end of the femoral joint member, which is coupled to the distal end of the femur. It is characterized by including an outer chamfer to prevent ligament damage by preventing a collision with the side ligament.
  • the artificial knee joint according to the present invention further comprises an inner chamfer chamfered into a smooth concave curved shape in which the femoral coupling member is inwardly recessed from the inner edge of the posterior joint end.
  • the artificial knee joint according to the present invention is a bearing member located between the femur coupling member and the tibia coupling member, wherein the bearing member includes a rear protrusion protruding upward from the rear thereof.
  • the rear protruding portion includes a rear chamfer chamfered in a concavely curved curved shape, and the rear chamfer can prevent collision with the ligaments.
  • the artificial knee joint according to the present invention the bearing member further includes a front projection protruding upward from the front, the front projection is formed higher than the height of the rear projection is natural It is characterized by being able to prevent knee movement and anterior dislocation.
  • the present invention can achieve the following effects by the combination of the above-mentioned problem solving means and the configuration to be described later, the operation relationship.
  • the side ligaments collide due to the horizontal axis of rotation of the femoral coupling member due to the outer edge of the femoral coupling member.
  • an outer chamfer on the outer edge of the rear joint end of the femoral coupling member can prevent the ligament damage by preventing the collision with the side ligament.
  • the posterior cruciate ligament existing in the inner side of the artificial knee joint of the conventional CR type has a problem that the ligaments are damaged by colliding with the inner edges according to the transverse rotation of the femur coupling member in the plane.
  • An inner chamfer may be included at the inner edge of the posterior joint end of the member to prevent collision with the posterior cruciate ligament, thereby preventing the ligament from being damaged.
  • the posterior ligament collides with the posterior protrusion of the bearing member and the ligament is damaged.
  • the rear chamfer may be included in the rear protrusion of the bearing member to prevent ligament damage.
  • the present invention in the conventional artificial knee joint, pain caused by collision with the ligaments and seriously inflamed, causing the disease, in order to prevent this, by placing a chamfer on the femoral coupling member and the bearing member to the ligaments It does not involve pain and can achieve the effect of forming a more stable artificial knee joint.
  • FIG. 1 is a view showing a state in which a conventional artificial knee joint is performed
  • Figure 2 is a rear view of the femur joint member of the conventional PS type artificial knee joint
  • Figure 3 is a rear view of the femur coupling member of the conventional CR type artificial knee joint
  • FIG. 5 is a diagram illustrating a horizontal axis twist rotation of a conventional artificial knee joint
  • Figure 6 is a rear view of the femur coupling member of the PS type artificial knee joint according to an embodiment of the present invention
  • Figure 7 is a rear view of the femur coupling member of the CR type artificial knee joint according to an embodiment of the present invention
  • FIG. 8 is a perspective view of a bearing member in the artificial knee joint according to another embodiment of the present invention.
  • Figure 2 is a rear view of the femoral coupling member of the conventional PS type artificial knee joint
  • Figure 3 is a rear view of the femoral coupling member of the conventional CR type artificial knee joint
  • Figure 4 is a view showing a horizontal transverse axis twist rotation of the conventional artificial knee joint.
  • 5 is a view showing a horizontal transverse twisting rotation of the artificial knee joint
  • Figure 6 is a rear view of the femoral coupling member of the PS type artificial knee joint according to an embodiment of the present invention
  • Figure 7 is a view of the present invention
  • Figure 8 is a rear view of the femur coupling member of the CR type artificial knee joint according to one embodiment
  • Figure 8 is a perspective view of a bearing member in the artificial knee joint according to another embodiment of the present invention.
  • FIGS. 4 and 5 Prior to describing the artificial knee joint according to the present invention, due to the outer edge (19a) and the inner edge (19b) of the posterior articular end 19 of the femoral coupling member 10 of the conventional artificial knee joint of Figures 2 and 3 The ligament damage will be examined and the problems caused by ligament damage due to twisting rotation of the transverse transverse axis of the femoral coupling member 10 and the bearing member 50 in the conventional artificial knee joint shown in FIGS. 4 and 5 will be described. .
  • Figure 2 shows a PS type femoral member 10 for removing and performing the posterior cruciate ligament in the conventional artificial knee joint, so that the femur coupling member 10 includes an outer edge 19a of the posterior joint end.
  • FIG. 4 and 5 when the femoral coupling member 10 has a horizontal axial twisting rotation of the bearing member 50, the protruded outer edge 19a protrudes. Collide with the lateral ligaments. As a result, the lateral ligaments may be damaged due to frequent bumps and friction, and may cause pain and, in serious cases, inflammation.
  • Figure 3 is shown for the femoral coupling member 10 to be performed without removing the posterior cruciate ligament in the conventional artificial knee joint, according to the femoral coupling member 10 is the inner corner ( 19b).
  • the posterior joint end inner edge (19b) is to collide with the posterior cruciate ligament in the middle when the femoral coupling member 10 is twisted according to the horizontal transverse axis of the bearing member 50 as described above.
  • the posterior cruciate ligament is damaged, causing a problem that causes pain and inflammation.
  • the artificial knee joint of the present invention is to prevent the formation of a chamfer at the end of the posterior joint of the femoral coupling member.
  • Artificial knee joint of the present invention is the cartilage between the femur coupling member 100 and the femur coupling member 100 and the tibial coupling member shown in FIG. 8 coupled to the lower end of the tibia side of the femur shown in FIGS. 6 and 7 And a bearing member 500 that serves. Accordingly, the femur coupling member 100 is in contact with the bearing member 500 and friction, and the bearing member is subjected to a stress according to the load transmitted from the upper portion of the femur coupling member.
  • the femur coupling member and the bearing member is in contact, when the leg is moved due to the ligament, the tibia can move back and forth, and also can move left and right. Therefore, it is desirable to maintain the various contact points according to the curvature of the contact portion of the femur coupling member and the bearing member by the movement of the knee joint, so as to properly distribute the stress.
  • the femur coupling member 100 has a U-shape as a whole and is made of a material of biocompatibility, the upper portion has a portion that can be accommodated so that the femur can be coupled, and the lower portion has a curved surface having various curvatures that are slightly spherical. .
  • the femoral coupling member 100 is to cut a portion of the femur so that it can be accommodated in the femoral coupling member 100 and the femur receiving portion is formed inside the U-shape, the femur and the femur at the femur receiving portion It includes a fixing protrusion to be firmly coupled.
  • the femur coupling member 100 includes a bearing member contact portion 130 of the curved surface to be in contact with the bearing member 500 to be described later, the of the femoral coupling member designed in the artificial knee joint of the PS type
  • the case includes a cam 170 connected between both posterior condyles, and includes a posterior posterior end 190 located at the distal end of the posterior condyle of the femoral coupling member.
  • the femur accommodation portion is firmly coupled to the lower incision surface of the femur as a portion corresponding to the upper inside of the U-shape of the femur coupling member 100. Accordingly, the surface of the femur accommodation portion may have a rough surface or may be made of a porous material so as to be firmly coupled to the femur.
  • the fixing protrusion is a protrusion formed so as to be inserted into the femur to the upper side of the femur accommodating portion, and it is more preferable if there is a screw shape or a shape of a shape that can be firmly inserted into the femur to hold the bone tissue of the femur. will be.
  • the bearing member contact portion 130 is preferably formed in a shape such that when the femur moves in contact with the groove 510 of the bearing member 500 to be described below, the contact area is maximized to allow the stress to be naturally dispersed. Do.
  • the bearing member contact portion 130 is different from the curvature of the contact portion when viewed from the side and the curvature of the contact portion when viewed from the front side, such that having a different curvature can be a natural movement even when the front and rear knee joint movement and
  • the cam 170 is a post of the bearing member 500, which will be described below in place of the role of the posterior cruciate ligament in the case of the PS type artificial knee joint to be performed in a state in which the artificial knee joint is removed from the posterior cruciate ligament.
  • 570 is located at the posterior condyle of the femur coupling member 100 to engage with it.
  • the cam 170 is present in the artificial knee joint of the conventional PS type and will not be described in detail below.
  • the posterior condyle end 190 is a portion that refers to the end of the posterior articular in the U-shaped shape of the femoral coupling member 100 to be able to constitute a chamfer that can be said to the core of the present invention at the end Ligament damage can be prevented.
  • the posterior joint end 190 includes an outer chamfer 191 to prevent damage to the side ligaments and an inner chamfer 193 to prevent damage to the posterior cruciate ligament in the case of a CR type artificial knee joint. do.
  • the outer chamfer 191 forms a chamfer at the outer edge 19a of the posterior joint end of the conventional femur coupling member 10 of FIG. 2, as shown in FIGS. 6 and 7.
  • the femoral coupling member is configured to prevent damage to the side ligaments by protruding the outer edge 19a of the posterior joint end when the horizontal rotation of the bearing member causes the horizontal axis torsion.
  • the outer edge of the rear end of the posterior spherical sphere in which the outer chamfer 191 is formed is preferably formed in a smooth curved shape as shown in FIGS. 6 and 7, which is the outer edge of the rear joint end 19a.
  • the lateral ligament may be caught even though the chamfer is formed, and it may interfere with the smooth flexion of the knee joint.
  • the femoral coupling member 100 including the outer chamfer 191 it may be possible to prevent the side ligaments from being damaged even when the femoral coupling member 100 is twisted in the horizontal plane. .
  • the inner chamfer 193 is a chamfer formed in the inner edge of the posterior articular of the femoral coupling member in the CR type artificial knee joint of the conventional invention, as shown in Figure 7, due to this inner chamfer 192 of the CR type artificial knee joint
  • the femur coupling member 100 functions to prevent ligament damage without colliding with the posterior cruciate ligament at the center even if there is a horizontal axis of rotation of the bearing member.
  • the inner chamfer 193 is preferably formed to have a smooth concave curved shape recessed inwardly, which is in the groove 510 of the bearing member 500 in a state where the femur coupling member 100 is sufficiently bent.
  • the shape of the inner chamfer 193 has a concave shape in which the shape of the inner chamfer 193 is impregnated so as to prevent collision with the rear cruciate ligament due to the rotation of the transverse cruciate ligament.
  • the bearing member 500 plays a role similar to that of the human cartilage between the femoral coupling member 100 and the tibia coupling member, which is different from the materials of the femoral coupling member and the tibia coupling member. It is preferable that the material is formed of polyethylene so that the heat is not generated due to the friction and the like, and thus it is resistant to friction, and the surface is smooth to allow natural frictional contact.
  • the bearing member 500 has grooves (Groove, 510) when viewed from the front and the side of the bearing member 500 when viewed from the side when the contact portion 130 of the femur coupling member 100 is in contact thereon. It includes a front protrusion 530 and a rear protrusion 540 formed in.
  • the posterior cruciate ligament may be removed and may include a post 570 to replace the ligament.
  • the groove portion 510 is a recessed portion formed in both directions of the artificial knee joint of the present invention when viewed from the front of the bearing member 500.
  • the portion is a bearing member contact portion 130 of the femur coupling member 100.
  • In contact with the femur coupling member 100 is a portion that is rubbed when rotating. Therefore, since the load concentrates on this area according to the contact, it is necessary to widen the contact area as much as possible to prevent the concentration of stress. Therefore, it is preferable that the groove portion 510 has a curvature corresponding to the bearing member contact portion 130 of the femur coupling member 100.
  • the front protrusion 530 and the rear protrusion 540 may be formed to be different in height from the front and rear portions of the bearing member 500 as protruding upwards, and the height of the front protrusion 530 is rearward. It is formed to be higher than the height of the protrusion 540, which is to prevent natural knee movement and anterior dislocation.
  • the front protrusion 530 and the rear protrusion 540 protrude a certain height from the front and the rear when the bearing member 500 is viewed from the side, in particular, the front protrusion 530 is the height of the rear protrusion
  • the front protrusion 530 is the height of the rear protrusion
  • the rear protrusion 540 has a height lower than that of the front protrusion 530 to prevent dislocation when the knee is bent and rolled back at a large angle, thereby enabling stable knee joint movement. Accordingly, the rear protrusion 540 may be bent slightly forward when the knee is completely extended. Accordingly, the rear protrusion and the rear ligament collide with each other to cause ligament damage. 541).
  • the rear chamfer 541 is the core of the present invention, even if the rear projections in the bearing member, even if the low protruding contact with the posterior ligament may cause damage to the posterior ligament can cause pain and inflammation.
  • a chamfer having a smooth curved shape concavely recessed in the rear protrusion 540 is formed in the rear protrusion 540 to prevent the rear ligament from colliding.
  • the collision with the posterior ligament can be prevented through the rear chamfer 541 and the ligament injury prevention, which is the object of the present invention, can be realized, thereby realizing more stable artificial knee joint.
  • the post 570 is a portion protruding upward in the central portion of the bearing member 500 to replace the role of the posterior cruciate ligament removed when the artificial knee joint of the present invention is operated in the PS type. Since the configuration of the post 570 is well known to those skilled in the art, detailed description thereof will be omitted.
  • Figure 6 is a rear view of the femur coupling member of the PS type artificial knee joint according to an embodiment of the present invention
  • Figure 7 is a rear view of the femur coupling member of the CR type artificial knee joint according to an embodiment of the present invention
  • Figure 8 Is a perspective view of a bearing member in an artificial knee joint according to another embodiment of the present invention.
  • the femur coupling member 100 is the end of the posterior joint
  • the artificial knee joint of the present invention is included in the 190 including the outer chamfer 191 to prevent the collision with the ligaments of the side function to prevent damage to the ligaments.
  • the knee of the human body does not only move forward and backward, but because the femoral coupling member in contact with the upper surface of the bearing member also rotates in the horizontal axis, the rear joint end of the femoral member collides with the lateral ligament.
  • the outer edge of the end is cut to form a chamfer.
  • the outer chamfer 191 is preferably made of a smooth curved shape protruding outward, which is to minimize the damage to the side ligament when there is a horizontal axis of rotation of the femur coupling member 100, and more Furthermore, in order to enable a smooth rotational movement of the knee joint.
  • the femoral coupling member 100 includes an inner chamfer 193 as well as an outer chamfer 191 at the rear joint end 190.
  • the femoral coupling member of the femur coupling member is prevented because it is collided with the posterior cruciate ligament in the center by the horizontal axis twist rotation of the femoral coupling member as described above.
  • the inner edge of the posterior joint end was cut to form a chamfer.
  • the inner chamfer 193 may be formed in a gentle curved shape indented into the inner, such that the indented curved shape is formed, the femoral coupling member 100 is rotated in the horizontal axis on the top of the bearing member 500 This is because it is most preferable to form the chamfer of the inner edge of the rear articular end 190 is close to the circle around the axis because it rotates around the posterior cruciate ligament of the center.
  • the bearing member 500 of the present invention includes a rear chamfer 541, which is bent slightly forward when the actual knee is fully extended, so The rear protrusion and the rear ligament included in the bearing member 500 collide with each other, thereby causing a problem of damaging the ligament on the rear side.
  • the bearing member 500 of the present invention cuts the conventional rear protrusion to form the rear chamfer 541 so as not to collide with the ligament on the rear side.
  • the rear chamfer 541 preferably has a curved shape recessed inward.

Abstract

L'invention concerne une articulation artificielle du genou destinée à empêcher les blessures du ligament et à remplacer une articulation du genou naturelle. Plus particulièrement, elle concerne une articulation artificielle du genou qui comprend: un élément d'articulation du fémur qui est relié à une partie d'extrémité du tibia à proximité du fémur; un élément d'articulation du tibia qui est relié à une partie d'extrémité du fémur à proximité du tibia; et un élément support qui est placé entre les éléments d'articulation du fémur et du tibia. Une enceinte est formée au niveau de la partie d'extrémité d'un condyle postérieur dans l'élément d'articulation du fémur afin d'empêcher les blessures du ligament entraînées par la flexion de l'élément d'articulation du fémur lors d'exercices du genou. En outre, une opération du type CR est utilisée lors de l'insertion de l'articulation de genou artificielle afin de préserver le ligament croisé postérieur. A ce stade, comme il est possible que le ligament croisé postérieur soit blessé par flexion de l'élément d'articulation du fémur, une enceinte supplémentaire est formée au niveau du côté interne d'une partie d'extrémité du condyle postérieur. Par ailleurs, une enceinte est formée au niveau d'une protubérance postérieure dans l'élément support afin d'empêcher un ligament de heurter le support. Par conséquent, les blessures au ligament sont empêchées. A cette fin, l'articulation de genou artificielle comprend: un élément d'articulation du fémur qui est relié à une partie d'extrémité du tibia à proximité du fémur; un élément d'articulation du tibia qui est relié à une partie d'extrémité du fémur à proximité du tibia; et un élément support qui est placé entre les éléments d'articulation du fémur et du tibia, la partie d'extrémité du condyle postérieur au niveau de l'élément d'articulation du fémur, comprend une enceinte externe destinée à empêcher la collision d'un ligament latéral contre l'élément d'articulation du fémur. Cett
PCT/KR2009/000104 2008-01-08 2009-01-08 Articulation artificielle du genou destinée à empêcher les blessures du ligament WO2009088238A2 (fr)

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