WO2018030716A1 - Tête pour articulation artificielle et articulation artificielle la comprenant - Google Patents

Tête pour articulation artificielle et articulation artificielle la comprenant Download PDF

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Publication number
WO2018030716A1
WO2018030716A1 PCT/KR2017/008441 KR2017008441W WO2018030716A1 WO 2018030716 A1 WO2018030716 A1 WO 2018030716A1 KR 2017008441 W KR2017008441 W KR 2017008441W WO 2018030716 A1 WO2018030716 A1 WO 2018030716A1
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WO
WIPO (PCT)
Prior art keywords
head
curved surface
bone
radius
center
Prior art date
Application number
PCT/KR2017/008441
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English (en)
Korean (ko)
Inventor
전인호
홍한표
Original Assignee
재단법인 아산사회복지재단
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication of WO2018030716A1 publication Critical patent/WO2018030716A1/fr

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Classifications

    • 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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3611—Heads or epiphyseal parts of femur
    • A61F2002/3615—Heads or epiphyseal parts of femur having a concave shape, e.g. hemispherical cups

Definitions

  • the present invention relates to an artificial joint head and an artificial joint including the same.
  • the hip joint is a joint that connects between the femur of the human body and the acetabular pelvis, and is a joint that plays an important role in sitting or standing.
  • the hip can be damaged by pathological causes such as arthritis and femoral head avascular necrosis and trauma. If the damage is large, the artificial hip can be inserted through surgery to replace it.
  • An artificial hip is a surgical implant that replaces an injured hip (hip) with an artificial joint. It consists of an acetabular cup, a head, and a stem.
  • the acetabular cup, head and stem are made of materials such as titanium alloy, which are harmless to the human body.
  • the acetabular cup is located in the acetabular pelvis, and the stem is inserted into the femur and fixed.
  • a spherical head formed of a ceramic or metal material is fixed to the end of the stem, and the head is accommodated in the acetabular cup to rotate.
  • the head is rotated while being accommodated in the acetabular cup, where the acetabular cup and the head make point contact.
  • the joint fluid is received between the acetabular cup and the head, continuous rotation of the head causes the joint fluid to be pushed out, reducing the cushioning function between the acetabular cup and the head, resulting in head wear.
  • the present invention has an object to provide an artificial joint head and an artificial joint including the same that can minimize the wear between the acetabular cup and the head of the artificial joint.
  • one end is fixed to the first bone of the human body, the other end of the stem (stem) formed with a coupling portion, the head including an insertion portion is inserted into the coupling portion and the head is inserted can be rotated
  • An accommodating cup formed to accommodate the second bone, wherein the second bone corresponds to the first bone, and the head is recessed to a predetermined depth from the outer circumferential surface of the head toward the center of the head.
  • An artificial joint is provided, comprising a recess.
  • the artificial joint of the present invention may minimize the wear by maximizing the hydraulic lubricating action between the head and the acetabular cup through the head for artificial joint including the first recess.
  • the artificial joint of the present invention allows the head and the acetabular cup to be in circular contact instead of point contact through the first concave having a smooth curved surface, so that the artificial joint can withstand external shocks. Can be improved.
  • FIG. 1 is a perspective view schematically showing an artificial joint according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1.
  • FIG. 3 is a conceptual view schematically illustrating the artificial joint head of FIG. 1.
  • FIG. 4 is a perspective view schematically showing an artificial joint according to another embodiment of the present invention.
  • the present invention has one end fixed to the first bone of the human body, a stem having a coupling portion formed at the other end, a head including an insertion portion into which the coupling portion is inserted, and a receiving portion formed so that the head can be inserted and rotated. And an acetabular cup fixed to a second bone, wherein the second bone corresponds to the first bone, and the head includes a first recess formed to be recessed to a certain depth from the outer circumferential surface of the head toward the center of the head.
  • the first concave portion may be disposed on an extension line extending in the longitudinal direction of the insertion portion.
  • the first concave portion is a first curved surface disposed in the center of the first concave portion, the first curved surface and the outer peripheral surface of the head while circumferentially the edge of the first curved surface It may include a second curved surface connecting the.
  • the first curved surface may have a concave shape in the direction of the center of the head, and the second curved surface may have a convex shape toward the acetabular cup.
  • the first curved surface has a first radius of curvature centered on the outside of the head
  • the second curved surface has a second radius of curvature located in the center of the head
  • the second radius of curvature may be equal to 1/2 of the radius of the head.
  • the head may be spaced apart from each other on the outer circumferential surface of the head, and may further include a plurality of second recesses formed in the same shape as the first recess.
  • the present invention in a state in which one end is coupled to the other end of the stem (stem) fixed to the first bone of the human body, is accommodated in the acetabular cup fixed to the second bone corresponding to the first bone in the rotatable head (head)
  • the head may include an insertion part into which a coupling part formed at the other end of the stem is inserted; And a first recess formed to be recessed to a predetermined depth from the outer circumferential surface of the head toward the center of the head.
  • the first concave portion may be disposed on an extension line extending along the longitudinal direction of the insertion hole.
  • the first concave portion is a first curved surface disposed in the center of the first concave portion, the first curved surface and the outer peripheral surface of the head while circumferentially the edge of the first curved surface It may include a second curved surface connecting the.
  • the first curved surface may have a concave shape in the direction of the center of the head, and the second curved surface may have a convex shape toward the acetabular cup.
  • the first curved surface has a first radius of curvature centered on the outside of the head
  • the second curved surface has a second radius of curvature located in the center of the head
  • the second radius of curvature may be equal to 1/2 of the radius of the head.
  • the head may be spaced apart from each other on the outer circumferential surface of the head, and may further include a plurality of second recesses formed in the same shape as the first recess.
  • the term "include” or “having” means that a feature or component described in the specification is present and does not preclude the possibility of adding one or more other features or components.
  • FIG. 1 is a perspective view schematically showing the artificial joint 10 according to an embodiment of the present invention
  • Figure 2 is a cross-sectional view taken along the line II-II of Figure 1
  • Figure 3 for the artificial joint of Figure 1
  • an artificial joint 10 may include a stem 100, a head 200, and an acetabular cup 300.
  • the stem 100 is inserted into and fixed to the first bone of the human body, and a coupling part 110 may be formed at the other end.
  • the first bone may be the femur.
  • the stem 100 has a front end portion 130 inserted into the femur, a seating portion 120 extending from the front end portion 130, and a coupling portion 110 which can be coupled to the head 200 which is extended from the seating portion 120 and described later. ) May be included.
  • the distal end 130 and the seating part 120 are inserted into the femur and fixed to the femur by the bone marrow secreted from the femur.
  • the tip portion 130 may have a circular cross-section in the longitudinal direction and may have a long rod shape, and may have a smaller diameter than the seating portion 120.
  • the seating part 120 may be formed in an elliptical shape with respect to the longitudinal direction, and may be formed such that the area of the cross section is increased toward the coupling part 110.
  • the coupling part 110 may form a predetermined angle with the seating part 120, and may be formed at an obtuse angle corresponding to the physical characteristics of the user.
  • the acetabular cup 300 is provided with a receiving portion 310 (see FIG. 2) so that the head 200 is inserted and rotated, and may be fixed to a second bone corresponding to the first bone.
  • the second bone may be the pubic bone of the user connected to the femur, which is the first bone.
  • the receiving part 310 may be formed in the shape of a hemispherical cup to accommodate the head 200 having a ball shape.
  • Acetabular cup 300 may be coupled to the pubis through a protruding outer surface.
  • the outer surface of the acetabular cup 300 may be made of a metal having biocompatibility, for example, titanium alloy.
  • the accommodating part 310 of the acetabular cup 300 may be made of a material different from that of the outer surface, for example, made of a ceramic material.
  • the outer surface may be formed to be porous to promote bone fusion with the pubic bone.
  • the acetabular cup 300 may be coupled to the pubis using a coupling means such as a screw.
  • the head 200 may be mounted to the stem 100 including an insertion portion 230 into which the coupling portion 110 of the stem 100 may be inserted.
  • the head 200 has a first concave portion formed to be embedded in a predetermined depth from the outer circumferential surface of the head 200 toward the center O of the head 200 on an extension line A extending along the longitudinal direction of the insertion portion 230. And may include 210.
  • the first recess 210 may include a first curved surface 211 and a second curved surface 213 having a curved shape.
  • the first curved surface 211 is disposed in the center of the first concave portion 210 and may have a concave shape in the center direction of the head 200.
  • the second curved surface 213 may connect the outer circumferential surface of the first curved surface 211 and the head 200 while circumscribing the edge of the first curved surface 211.
  • the second curved surface 213 may have a convex shape toward the acetabular cup 300.
  • the first concave portion 210 may be a recess recessed from the outer circumferential surface of the head 200 and may be close to the groove shape near the top of the apple, for example.
  • the first concave portion 210 may perform a substantial reservoir function of the joint fluid in a state where the head 200 is accommodated in the acetabular cup 300.
  • the head according to the comparative example is formed into a perfect sphere.
  • the joint fluid performs a lubrication function that reduces the friction between the head and the acetabular cup between the head and the acetabular cup.
  • the spherical head according to the comparative example is accommodated in the acetabular cup and rotated while the joint fluid is pushed into the space between the head and the acetabular cup by rotation, and the friction between the acetabular cup and the head cannot be sufficiently reduced.
  • the spherical head is in point contact with the acetabular cup, there is a high risk of the head breaking when an impact is applied.
  • the artificial head 200 includes a first recess 210 which is a reservoir of a joint fluid, and the joint fluid is always accumulated in the first recess 210.
  • the hydrodynamic lubrication between the head 200 and the acetabular cup 300 may be continuously performed.
  • Lubrication refers to a phenomenon in which a material such as a liquid or a solid is inserted between friction surfaces to reduce the interaction between the two surfaces.
  • Hydraulic lubrication in artificial joints means using joint fluids to reduce friction between friction surfaces. In the comparative example, hydraulic lubrication through the joint fluid occurs, but as described above, sufficient fluid flow cannot be maintained.
  • the head 200 for an artificial joint can sufficiently maintain the flow of the joint fluid by using the first concave portion 210, and has less friction between the head 200 and the acetabular cup 300. It is possible to reduce the wear of the head 200 or the acetabular cup 300.
  • the first concave portion 210 allows the head 200 to induce a circular contact rather than a point contact with the acetabular cup 300, so that the impact structure is more robust than that of the comparative example. Can be formed.
  • the first concave portion 210 is disposed on an extension line in the longitudinal direction of the insertion portion 230 of the head 200, the first concave portion 210 also moves together by the rotation of the head 200. Can perform the function of.
  • the first concave portion 210 may include the first curved surface 211 and the second curved surface 213 as described above.
  • the first curved surface 211 has a first radius of curvature R1 at which the center O1 is located outside the head 200, and the second curved surface 213 is centered inside the head 200. It may have a second radius of curvature R2 where (O2) is located.
  • the first curved surface 211 may have a concave shape toward the center of the head 200
  • the second curved surface 213 may have a convex shape toward the acetabular cup 300.
  • the first radius of curvature R1 and the second radius of curvature R2 may be the same, but the present invention is not limited thereto.
  • the first radius of curvature R1 may be smaller than the second radius of curvature R2.
  • the second radius of curvature R2 may be equal to 1/2 of the radius r of the head 200.
  • the second radius of curvature R2 has a value of 1/2 of the radius r of the head 200, thereby forming a convex second curved surface 213 having a gentle slope from the outer circumferential surface of the head 200.
  • the size of the first concave portion 210 may correspond to the size D1 of the insertion portion 230 on the outer circumferential surface of the head 200.
  • the size of the first concave portion 210 means the size at both ends that are embedded due to the circles having the second radius of curvature R2, which is substantially the same as the size D1 of the insert 230. can do.
  • There is no limitation on the size of the first concave portion 210 but when the size of the first concave portion 210 is larger than the size (D1) of the insertion portion 230, the depth of the first concave portion 210 as well As it becomes larger, it may be weak to external shocks.
  • the size of the first concave portion 210 is smaller than the size (D1) of the insertion portion 230, it may not be sufficient to perform the joint fluid reservoir function between the head 200 and the acetabular cup (300).
  • the artificial joint 10 can induce continuous storage and flow of the joint fluid, and can maximize the hydraulic lubricating action to reduce wear.
  • FIG. 4 is a perspective view schematically showing an artificial joint 10 according to another embodiment of the present invention.
  • the artificial joint head 200 may include a first recess 210 and may further include a plurality of second recesses 250.
  • the plurality of second recesses 250 may be spaced apart from each other on the outer circumferential surface of the head 200, and may be formed in the same shape as the first recesses 210.
  • the size of the second recess 250 may be the same as or smaller than the first recess 210.
  • the second recess 250 may be disposed at a position different from that of the first recess 210 to serve as a reservoir of joint fluid having the same function as the first recess 210.
  • the second recess 250 is regularly arranged in the drawing, as another embodiment, the second recess 250 may be irregularly arranged.
  • the position and number of the second recesses 250 may be designed so as not to affect the durability of the head 200.
  • the artificial joint 10 is provided between the head 200 and the acetabular cup 300 through the artificial joint head 200 including the first concave portion 210. Minimize wear by maximizing hydraulic lubrication.
  • the head 200 and the acetabular cup 300 are circular contact instead of point contact through the first concave having a smooth curved surface. By doing so, it is possible to improve the durability that the artificial joint 10 can withstand external shocks.
  • the artificial joint has been described as an artificial joint disposed between the femur and the pubis, the present invention is not limited thereto and may be applied to artificial joints at other positions.
  • an artificial joint head and an artificial joint including the same are provided.
  • embodiments of the present invention can be applied to artificial joint surgery used in the industry.

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

La présente invention concerne une articulation artificielle comprenant : une tige fixée à une extrémité de celle-ci à un premier os d'un corps humain et ayant une partie de couplage à son autre extrémité; une tête comprenant une partie d'insertion dans laquelle la partie de couplage est insérée; et une cupule acétabulaire ayant une partie de réception formée à l'intérieur de celle-ci pour permettre l'insertion et la rotation de la tête et étant fixée à un second os correspondant au premier os, la tête comprenant une première partie concave formée pour être évidée d'une profondeur prédéterminée vers le centre de la tête à partir de la surface périphérique externe de la tête.
PCT/KR2017/008441 2016-08-08 2017-08-04 Tête pour articulation artificielle et articulation artificielle la comprenant WO2018030716A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2016-0100888 2016-08-08
KR1020160100888A KR20180016893A (ko) 2016-08-08 2016-08-08 인공 관절용 헤드 및 이를 포함하는 인공 관절

Publications (1)

Publication Number Publication Date
WO2018030716A1 true WO2018030716A1 (fr) 2018-02-15

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PCT/KR2017/008441 WO2018030716A1 (fr) 2016-08-08 2017-08-04 Tête pour articulation artificielle et articulation artificielle la comprenant

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WO (1) WO2018030716A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11128255A (ja) * 1997-10-24 1999-05-18 Masanori Kobayashi 人工関節
US20030114935A1 (en) * 2001-12-19 2003-06-19 Chan Frank W. Prosthetic joints having reduced area bearing surfaces and application thereof to a range of sizes of prosthetic joints
JP2003175061A (ja) * 2001-09-14 2003-06-24 Benoist Girard Sas 関節補綴物の球形頭部に用いる弾性指貫状物
JP2004337485A (ja) * 2003-05-19 2004-12-02 Keiji Imado 人工股関節
US20060259148A1 (en) * 2003-10-28 2006-11-16 Presrv Ltd. Cartilage-preserving long bone head prosthesis

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11128255A (ja) * 1997-10-24 1999-05-18 Masanori Kobayashi 人工関節
JP2003175061A (ja) * 2001-09-14 2003-06-24 Benoist Girard Sas 関節補綴物の球形頭部に用いる弾性指貫状物
US20030114935A1 (en) * 2001-12-19 2003-06-19 Chan Frank W. Prosthetic joints having reduced area bearing surfaces and application thereof to a range of sizes of prosthetic joints
JP2004337485A (ja) * 2003-05-19 2004-12-02 Keiji Imado 人工股関節
US20060259148A1 (en) * 2003-10-28 2006-11-16 Presrv Ltd. Cartilage-preserving long bone head prosthesis

Also Published As

Publication number Publication date
KR20180016893A (ko) 2018-02-20

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