GB2080118A - An acetabular cup - Google Patents

An acetabular cup Download PDF

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Publication number
GB2080118A
GB2080118A GB8120325A GB8120325A GB2080118A GB 2080118 A GB2080118 A GB 2080118A GB 8120325 A GB8120325 A GB 8120325A GB 8120325 A GB8120325 A GB 8120325A GB 2080118 A GB2080118 A GB 2080118A
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United Kingdom
Prior art keywords
cup
acetabular cup
acetabulum
acetabular
grooves
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Withdrawn
Application number
GB8120325A
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to GB8120325A priority Critical patent/GB2080118A/en
Publication of GB2080118A publication Critical patent/GB2080118A/en
Withdrawn legal-status Critical Current

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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
    • A61F2/30721—Accessories
    • A61F2/30724—Spacers for centering an implant in a bone cavity, e.g. in a cement-receiving cavity
    • 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
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A61B17/8802—Equipment for handling bone cement or other fluid fillers
    • A61B17/8805—Equipment for handling bone cement or other fluid fillers for introducing fluid filler into bone or extracting it
    • A61B17/8808—Equipment for handling bone cement or other fluid fillers for introducing fluid filler into bone or extracting it with sealing collar for bone cavity
    • 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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/3082—Grooves
    • A61F2002/30822—Circumferential grooves
    • 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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/3082—Grooves
    • A61F2002/30827—Plurality of grooves
    • 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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
    • A61F2002/30891—Plurality of protrusions
    • A61F2002/30894—Plurality of protrusions inclined obliquely with respect to each other
    • 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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30904—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves serrated profile, i.e. saw-toothed
    • 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
    • A61F2002/3412—Acetabular cups with pins or protrusions, e.g. non-sharp pins or protrusions projecting from a shell surface
    • 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
    • A61F2002/3412—Acetabular cups with pins or protrusions, e.g. non-sharp pins or protrusions projecting from a shell surface
    • A61F2002/3414—Polar protrusion, e.g. for centering two concentric shells
    • 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
    • A61F2002/3412—Acetabular cups with pins or protrusions, e.g. non-sharp pins or protrusions projecting from a shell surface
    • A61F2002/342—Acetabular cups with pins or protrusions, e.g. non-sharp pins or protrusions projecting from a shell surface the outer shell having circumferential protrusions parallel to the equatorial plane, e.g. circumferential fins or wings
    • 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
    • A61F2002/3429—Acetabular cups with an integral peripheral collar or flange, e.g. oriented away from the shell centre line
    • 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
    • A61F2002/344—Acetabular cups the inner shell having an inner hip femoral head-receiving cavity offset from its centre line
    • 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
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2002/4631—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor the prosthesis being specially adapted for being cemented

Landscapes

  • 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

An acetabular cup moulded or machined from a synthetic plastics material such as high density polyethylene has an external part spherical envelope and defines a substantially part-spherical internal recess for receiving the head of the femoral endoprosthesis. Concentric bone cement receiving grooves 2 are formed in the external surface of the cup and ungrooved circumferential portions of that surface support integral or inserted studs 7, 8, 9 which act as spacers to facilitate, in use, the formation of a layer of bone cement of substantially constant thickness between cup and acetabulum. An integral flange 6 around the circular periphery of the cup serves, in use, to apply pressure to the bone cement to push it into the bone and the grooves 2 of this cup. <IMAGE>

Description

SPECIFICATION An acetabular cup The present invention relates to an acetabular cup for use in the production of a prosthesis.
The cup is particularly, although not exclusively, intended for the femoral endoprosthesis of my copending United Kingdom patent application No. 8005254 filed on the 1 5th February, 1980. Whilst the cup provides the socket the femoral endoprosthesis provides the base of a ball and socket hip joint.
Such acetabular cups are well known and, in their installation, the acetabulum is cleared of any loose bone and cartilage and the cup fixed therein in the correct position by means of bone cement. The optimum layer thickness of bone cement between cup and acetabulum is considered to be 4 to 6 mm over the whole external surface of the cup. In existing cups uniform distribution of cement around the cup is difficult to achieve.
According to the present invention, there is provided an acetabular cup for insertion in the acetabulum in the production of an artificial hip joint, the cup having an external envelope of substantially part-spherical shape and defining a substantially part-spherical internal recess for receiving the head of a femoral endoprosthesis, in which the external surface of the cup is formed with a plurality of grooves, a plurality of spacers extend out from the external envelope of the cup and a flange extends around the circular periphery of the envelope such that when the cup is placed in position in the acetabulum a space of substantially constant thickness is defined between the external envelope of the cup and the external surface of the acetabulum for the insertion of cement, the grooves act to receive cement when inserted to improve keying between the cup and the surrounding bone and the flange acts to retain cement so inserted.
A preferred embodiment of the invention may comprise any one or more of the following advantageous features:~ (a) The cup is made of synthetic plastics material.
(b) The synthetic plastics material is high density polyethylene.
(c) The cup is moulded from synthetic plastics material.
(e) The flange is integral with the remainder of the cup.
(f) The flange is flexible so that in operation it can be used to apply pressure to cement in the acetabulum.
(g) The grooves extend circumferentially around the cup.
(h) The grooves are circular.
(i) The spacers comprise small individual projecting members.
(j) The spacers are fixed in complementary holes formed in the external surface of the cup.
(k) The spacers are integral with the remainder of the cup.
(I) The spacers comprise individual members projecting from an ungrooved circular belt extending circumferentially around the external surface of the cup and the grooves are formed in those parts of the external surface extending to both sides of the circular belt.
In order that the invention may be more clearly understood, two embodiments will now be described, by way of example, with reference to the accompanying drawings, in which: Figure 1 shows a side elevational view of a first form of acetabular cup, Figure 2 shows a sectional view of the cup illustrated in Fig. 1, and Figure 3 shows a plan view of the cup illustrated in Fig. 1.
Referring to Figs. 1-3, the acetabular cup is turned down from a solid block of synthetic plastics material. The preferred material is high density polyethylene (RCH 1000), but other synthetic plastics material may equally well be used. The cup is of substantially hemispherical shape and defines a substantially hemi-spherical recess 1 in the base thereof.
This recess, the centre of which is offset in relation to the centre of the cup as can be seen from Fig. 2, forms the socket into which the ball head of the femoral endoprosthesis described in my copending United Kingdom patent application No. 8005254 filed 1 5th February, 1980 fixed to form a complete joint. The external surface of the cup is provided with a series of parallel circumferentially extending grooves 2. These grooves 2 are disposed so as to leave two circumferentially extending ungrooved bands 3 and 4. An ungrooved area 5 is also left at the very top of the cup. An integral flange 6 extends circumferentially around the base of the cup. In the bands 3 and 4 and the area 5 a plurality of spacers are formed. These spacers are in stud form and are machined out of the base material in the same manner as the remainder of the cup.The length of the spacers 7, 8 and 9 is such that they form with the free edge of the flange 6 a substantially hemi-spherical envelope 10 which is spaced from the hemispherical envelope 11 of the actual surface of the cup by a distance of between 2-6 mm.
As can be seen from Fig. 3, provision is made in this particular cup for four spacers 7 and for four spacers 8. In order to simplify the drawings, some of the spacers have been omitted in Figs. 1 and 2 and all of them have been omitted in Fig. 3. The stud form of the spacers ensures a uniform distribution of cement and enables a satisfactory spacing to be achieved without any unacceptable division of the cement layer between the acetabulum and the cup. In use the offset recess 1 localises the centre of the axis of rotation of the hip joint enabling leg length equalisation to be achieved more easily as the cup can be placed in a precise position in the acetabulum.
In installation of this cup, the acetabulum is cleaned to remove any loose bone or carti lage. The acetabulum is filled with cement and the cup pushed in to express the excess cement. The spacers 7, 8 and 9 hold the main body of the acetabular cup the correct distance away from the internal wall of the acetabulum so that a layer of bone cement of uniform thickness of between 2-6 mm is obtained between the acetabulum itself and the acetabular cup. If the cup is pushed in, pressure will be exerted on the cement via the flange 6, thus producing a cement pressure injection effect. This pressurisation forces the bone cement against the inner wall of the acetabulum and into the grooves 2 of the acetabular cup thereby helping to provide a good key between the acetabulum, the acetabular cup and the bone cement.Naturally, the size of the acetabular cup is chosen to fit the particular acetabulum for which it is intended.
However, certain dimensions of the cup advantageously remain the same whatever size of cup is chosen. Thus, in the preferred form of cup the width F of the flange 6 and the preferred extension E of the spacers from the surface of the cup is 3 mm. The dimension W is also constant at 7 mm and the diameter of the recess 1 is also constant.
Dimension V therefore varies depending on the size of cup. This arrangement facilitates manufacture of the cup whilst maintaining desired cup performance in use irrespective of cup size. In use the cup is placed in the acetabulum with the recess lowermost. This increases the stability of the joint, increases or restores leg length, tensions the musculature and reduces the tendency to dislocate.
It will be appreciated that the above embodiments have been described by way of example only and that many variations are possible without departing from the scope of the invention. For example, the cup could be formed with appropriate apertures and the spacers 7, 8 and 9 inserted into these apertures. This cup may be moulded instead of being machined.
It will be appreciated that the above described embodiment, apart from ensuring an optimum distribution of bone cement around the cup, a precise fitting of the cup in the acetabulum, and the ability to pressurise the bone cement in order to provide for better keying also ensures that the locus of rotation of the ball and socket and joint are always in the optimum position to equalise leg length and give a firm reduction to guard against dislocation.

Claims (14)

1. An acetabular cup for insertion in the acetabulum in the production of an artificial hip joint, the cup having an external envelope of substantially part-spherical shape and defining a substantially part-spherical internal recess for receiving the head of a femoral endoprosthesis, in which the external surface of the cup is formed with a plurality of grooves, a plurality of spacers extend out from the external envelope of the cup and a flange extends around the circular periphery of the envelope such that when the cup is placed in position in the acetabulum a space of substantially constant thickness is defined between the external envelope of the cup and the external surface of the acetabulum for the insertion of cement, the grooves act to receive cement when inserted to improve keying be tween the cup and the surrounding bone and the flange acts to retain cement so inserted.
2. An acetabular cup as claimed in Claim 1, in which the cup is made of synthetic plastics material.
3. An acetabular cup as claimed in Claim 1 or 2, in which the cup is moulded from synthetic plastics material.
4. An acetabular cup as claimed in Claim 1 or 2, in which the cup is machined from synthetic plastics material.
5. An acetabular cup as claimed in Claims 2, 3 or 4, in which the synthetic plastics material is high density polyethylene.
6. An acetabular cup as claimed in any preceding claim, in which the flange is integral with the remainder of the cup.
7. An acetabular cup as claimed in any preceding claim, in which the flange is flexible so that in operation it can be used to apply pressure to cement in the acetabulum.
8. An acetabular cup as claimed in any preceding claim, in which the grooves extend circumferentially around the cup.
9. An acetabular cup as claimed in Claim 8, in which the grooves are circular.
10. An acetabular cup as claimed in any preceding claim, in which the spacers comprise small individual projecting members.
11. An acetabular cup as claimed in any preceding claim, in which the spacers are fixed in complementary holes formed in the external surface of the cup.
12. An acetabular cup as claimed in any preceding claim, in which the spacers are integral with the remainder of the cup.
13. An acetabular cup as claimed in claim 1, in which the spacers comprise individual members projecting from an ungrooved circular belt extending circumferentially around the external surface of the cup and the grooves are formed in those parts of the external surface extending to both sides of the circular belt.
14. An acetabular cup for insertion in the acetabulum in the production of an artificial hip joint substantially as hereinbefore described with reference to the accompanying drawings.
GB8120325A 1980-07-05 1981-07-01 An acetabular cup Withdrawn GB2080118A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8120325A GB2080118A (en) 1980-07-05 1981-07-01 An acetabular cup

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8022136 1980-07-05
GB8120325A GB2080118A (en) 1980-07-05 1981-07-01 An acetabular cup

Publications (1)

Publication Number Publication Date
GB2080118A true GB2080118A (en) 1982-02-03

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Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0120595A1 (en) * 1983-02-23 1984-10-03 Minnesota Mining And Manufacturing Company Prosthetic acetabular cup
DE3341724C1 (en) 1983-11-18 1984-12-13 Protek AG, Bern Acetabulum endoprosthesis
GB2150441A (en) * 1983-11-28 1985-07-03 Larry S Matthews Prosthesis having an improved interface surface
US4566138A (en) * 1983-03-08 1986-01-28 Zimmer, Inc. Prosthetic device with spacers
EP0169978A1 (en) * 1984-07-16 1986-02-05 GebràœDer Sulzer Aktiengesellschaft Endoprosthesis with an interior and exterior part for a hip joint cup
EP0212087A1 (en) * 1985-07-15 1987-03-04 GebràœDer Sulzer Aktiengesellschaft Hip joint cup cementlessly anchorable in the pelvis
FR2617040A1 (en) * 1987-06-23 1988-12-30 Erato Acetabular prosthesis
EP0314951A1 (en) * 1987-11-03 1989-05-10 Waldemar Link (GmbH &amp; Co.) Acetabular cup prosthesis
FR2628315A1 (en) * 1988-03-14 1989-09-15 Medinov Sarl Bone cavity implant e.g. for hip prosthesis - has metal ring with three bosses penetrated by screws, collar preventing spread of cement and plastics core
US4997447A (en) * 1988-08-17 1991-03-05 Minnesota Mining And Manufacturing Company Screw-threaded acetabular component of hip joint prosthesis
FR2651996A3 (en) * 1989-09-21 1991-03-22 Augoyard Marc Cemented prosthesis cup
FR2654923A1 (en) * 1989-11-28 1991-05-31 Implants Instr Ch Fab ARTIFICIAL COTYLA WITH CEMENT FIXING IN THE COTYLOUIDIAN CAVITY OF THE ILLIAC BONE.
US5080677A (en) * 1988-08-17 1992-01-14 Minnesota Mining And Manufacturing Company Acetabular component of hip joint prosthesis
US5116380A (en) * 1991-02-28 1992-05-26 Zimmer, Inc. Prosthetic implant with spacers having tapered trailing edges
US5217499A (en) * 1988-08-17 1993-06-08 Minnesota Mining And Manufacturing Company Rim-bearing acetabular component of hip joint prosthesis
US5226917A (en) * 1991-02-14 1993-07-13 Smith & Nephew Richards Inc. Acetabular prosthesis with anchoring pegs
NL9200070A (en) * 1992-01-15 1993-08-02 Orthopaedic Tech Bv JOINT PROSTHESIS.
US5310408A (en) * 1991-02-14 1994-05-10 Smith & Nephew Richards Inc. Acetabular cup body prosthesis
EP0617931A2 (en) * 1993-03-31 1994-10-05 Wessinghage, Dieter, Prof. Dr. med. Artificial hip acetabular cup
FR2707479A1 (en) * 1993-07-02 1995-01-20 Fii Device for fixing a prosthetic implant in a bone cavity using cement
US5549697A (en) * 1994-09-22 1996-08-27 Johnson & Johnson Professional, Inc. Hip joint prostheses and methods for manufacturing the same
EP0739613A1 (en) * 1995-04-27 1996-10-30 BENOIST GIRARD &amp; Cie Acetabulum cup for a total prosthesis of the hip
EP0747024A2 (en) * 1995-06-09 1996-12-11 Bristol-Myers Squibb Company Orthopaedic bearing component and method for making the same
US5641323A (en) * 1994-02-18 1997-06-24 Johnson & Johnson Professional, Inc. Self-lubricating implantable articulation member
EP1852091A1 (en) * 2006-05-03 2007-11-07 Benoist Girard Sas Prosthetic acetabular cup with outwardly projecting flange
US8900321B2 (en) 2006-03-20 2014-12-02 Zimmer, Inc. Implant anchoring device

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0120595A1 (en) * 1983-02-23 1984-10-03 Minnesota Mining And Manufacturing Company Prosthetic acetabular cup
US4563778A (en) * 1983-02-23 1986-01-14 Minnesota Mining And Manufacturing Company Prosthetic acetabular cup
US4566138A (en) * 1983-03-08 1986-01-28 Zimmer, Inc. Prosthetic device with spacers
DE3341724C1 (en) 1983-11-18 1984-12-13 Protek AG, Bern Acetabulum endoprosthesis
GB2150441A (en) * 1983-11-28 1985-07-03 Larry S Matthews Prosthesis having an improved interface surface
AU570284B2 (en) * 1983-11-28 1988-03-10 Steven A. Goldstein Prosthesis interface surface
EP0169978A1 (en) * 1984-07-16 1986-02-05 GebràœDer Sulzer Aktiengesellschaft Endoprosthesis with an interior and exterior part for a hip joint cup
EP0212087A1 (en) * 1985-07-15 1987-03-04 GebràœDer Sulzer Aktiengesellschaft Hip joint cup cementlessly anchorable in the pelvis
FR2617040A1 (en) * 1987-06-23 1988-12-30 Erato Acetabular prosthesis
EP0314951A1 (en) * 1987-11-03 1989-05-10 Waldemar Link (GmbH &amp; Co.) Acetabular cup prosthesis
FR2628315A1 (en) * 1988-03-14 1989-09-15 Medinov Sarl Bone cavity implant e.g. for hip prosthesis - has metal ring with three bosses penetrated by screws, collar preventing spread of cement and plastics core
US4997447A (en) * 1988-08-17 1991-03-05 Minnesota Mining And Manufacturing Company Screw-threaded acetabular component of hip joint prosthesis
US5080677A (en) * 1988-08-17 1992-01-14 Minnesota Mining And Manufacturing Company Acetabular component of hip joint prosthesis
US5217499A (en) * 1988-08-17 1993-06-08 Minnesota Mining And Manufacturing Company Rim-bearing acetabular component of hip joint prosthesis
FR2651996A3 (en) * 1989-09-21 1991-03-22 Augoyard Marc Cemented prosthesis cup
FR2654923A1 (en) * 1989-11-28 1991-05-31 Implants Instr Ch Fab ARTIFICIAL COTYLA WITH CEMENT FIXING IN THE COTYLOUIDIAN CAVITY OF THE ILLIAC BONE.
EP0430831A1 (en) * 1989-11-28 1991-06-05 Fabrique D'implants Et D'instruments Chirurgicaux Societe A Responsabilite Limitee Artificial acetabular cup fastened in the cotyloid cavity with cement
US5226917A (en) * 1991-02-14 1993-07-13 Smith & Nephew Richards Inc. Acetabular prosthesis with anchoring pegs
US5310408A (en) * 1991-02-14 1994-05-10 Smith & Nephew Richards Inc. Acetabular cup body prosthesis
US5314487A (en) * 1991-02-14 1994-05-24 Smith & Nephew Richards Inc. Acetabular prosthesis with anchoring pegs
US5116380A (en) * 1991-02-28 1992-05-26 Zimmer, Inc. Prosthetic implant with spacers having tapered trailing edges
NL9200070A (en) * 1992-01-15 1993-08-02 Orthopaedic Tech Bv JOINT PROSTHESIS.
EP0617931A2 (en) * 1993-03-31 1994-10-05 Wessinghage, Dieter, Prof. Dr. med. Artificial hip acetabular cup
EP0617931A3 (en) * 1993-03-31 1994-10-26 Dieter Prof Dr Med Wessinghage Artificial hip acetabular cup.
FR2707479A1 (en) * 1993-07-02 1995-01-20 Fii Device for fixing a prosthetic implant in a bone cavity using cement
US5662158A (en) * 1994-02-18 1997-09-02 Johnson & Johnson Professional, Inc. Self-lubricating implantable articulation member
US5641323A (en) * 1994-02-18 1997-06-24 Johnson & Johnson Professional, Inc. Self-lubricating implantable articulation member
US5549697A (en) * 1994-09-22 1996-08-27 Johnson & Johnson Professional, Inc. Hip joint prostheses and methods for manufacturing the same
US5788916A (en) * 1994-09-22 1998-08-04 Johnson & Johnson Professional, Inc. Hip joint prostheses and methods for manufacturing the same
EP0739613A1 (en) * 1995-04-27 1996-10-30 BENOIST GIRARD &amp; Cie Acetabulum cup for a total prosthesis of the hip
FR2733410A1 (en) * 1995-04-27 1996-10-31 Benoist Girard & Cie ACETABULAR CUP FOR TOTAL HIP PROSTHESIS
EP0747024A2 (en) * 1995-06-09 1996-12-11 Bristol-Myers Squibb Company Orthopaedic bearing component and method for making the same
US8900321B2 (en) 2006-03-20 2014-12-02 Zimmer, Inc. Implant anchoring device
US9510883B2 (en) 2006-03-20 2016-12-06 Zimmer, Inc. Implant anchoring device
US10507112B2 (en) 2006-03-20 2019-12-17 Zimmer, Inc. Implant anchoring device
EP1852091A1 (en) * 2006-05-03 2007-11-07 Benoist Girard Sas Prosthetic acetabular cup with outwardly projecting flange
AU2007201930B2 (en) * 2006-05-03 2012-04-05 Stryker European Operations Holdings Llc Prosthetic acetabular cup with outwardly projecting flange

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