New! View global litigation for patent families

CA2168510C - Acetabular cup - Google Patents

Acetabular cup

Info

Publication number
CA2168510C
CA2168510C CA 2168510 CA2168510A CA2168510C CA 2168510 C CA2168510 C CA 2168510C CA 2168510 CA2168510 CA 2168510 CA 2168510 A CA2168510 A CA 2168510A CA 2168510 C CA2168510 C CA 2168510C
Authority
CA
Grant status
Grant
Patent type
Prior art keywords
cup
backing
metal
polymeric
acetabular
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
CA 2168510
Other languages
French (fr)
Other versions
CA2168510A1 (en )
Inventor
Dale F. Swarts
William L. Rohr, Jr.
Steve T. Lin
Thirumalai Devanathan
Steven L. Krebs
Paul D. Schoenle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zimmer Technology Inc
Original Assignee
Zimmer Technology Inc
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.)
Filing date
Publication date
Grant date

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30767Special external and/or bone-contacting surfaces, e.g. coating for improving bone ingrowth
    • A61F2/30907Nets or sleeves applied to surface of prostheses or in cement
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/32Joints for the hip
    • A61F2/34Acetabular cups
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/3094Designing or manufacturing processes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/3094Designing or manufacturing processes
    • A61F2/30965Reinforcing the prosthesis by embedding particles or fibres during moulding or dipping
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30317The prosthesis having different structural features at different locations within the same prosthesis
    • A61F2002/30324The prosthesis having different structural features at different locations within the same prosthesis differing in thickness
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30604Special structural features of bone or joint prostheses not otherwise provided for modular
    • A61F2002/30616Sets comprising a plurality of prosthetic parts of different sizes or orientations
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/3094Designing or manufacturing processes
    • A61F2002/30968Sintering
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/32Joints for the hip
    • A61F2/34Acetabular cups
    • A61F2002/3429Acetabular cups with an integral peripheral collar or flange, e.g. oriented away from the shell centre line
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2250/00Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0036Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in thickness
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2310/00Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00389The prosthesis being coated or covered with a particular material
    • A61F2310/00395Coating or prosthesis-covering structure made of metals or of alloys

Abstract

The present invention is directed to an acetabular cup prosthesis for implantation into a pelvic bone. A cup having a cavity for receiving a femoral head is formed of a polymeric material having a predetermined tensile strength. A backing is disposed about and attached to the polymeric cup. The backing has a porous construction defining interstitial pores, with the pores being sized to receive a portion of the polymeric cup therein and adapted for allowing ingrowth of the bone therein. The portion of the polymeric cup received within the pores results in an interface strength between the polymeric cup and the backing which is substantially equal to the tensile strength of the polymeric material.

Description

1. I~'ield of the invention.
The present invention relates to an acetabular cup prosthesis, and, more particularly, to a metal-backed, polymeric acetabular cup prosthesis.

2. Description of the related art.
It is known to provide an acetabular cup prosthesis having a plastic cup with a metal backing. The metal backing may be in the form of a woven metal grid which is sized to allow bone tissue to grow therein.
With known acetabular cup prostheses, the outside diameter of the cup may vary depending on the size of the pelvic bone of the patient into which the acetabular cup prosthesis is to be implanted. Changing the outside diameter of the acetabular cup in turn changes the radial stiffness of the cup. A radial stiffness which is not stiff enough may hasten deterioration of the polymeric cup and cause pinching of the femoral head, while a radial stiffness which is too stiff may not allow proper loading and stimulation of the bone tissue to encourage ingrowth of the bone into the metal backing.
What is needed in the art is an acetabular cup which may be constructed to substantially conform to a normalized radial stiffness, regardless of the outside diameter of the cup.

What is further needed in the art is an acetabular cup which ensures an adequate attachment between the polymeric cup and metal backing.
SUMMARY OF THE INVENTION
The present invention provides a kit comprising first and second acetabular cup prostheses, each of said first and second acetabular cups having a different outside diameter at a rim thereof, each of said first acetabular cup and said second acetabular cup comprising: a polymeric cup having a cavity for receiving a femoral head; and a backing disposed about and attached to said polymeric cup, said backing having a thickness and further having a porous construction defining interstitial pores, said polymeric cup being attached to said backing by penetrating into said pores a predetermined penetration depth; at least one of said backing thickness and said penetration depth varying between said first acetabular cup and said second acetabular cup, whereby each of said first acetabular cup and said second acetabular cup have substantially the same stiffness in a radial direction.

An advantage of the present invention is that the interface strength between the polymeric cup and the metal backing is approximately equal to the tensile strength of the polymeric material from which the polymeric cup is formed.
Another advantage is that it is possible to have a plurality of acetabular cups with different outside diameters, wherein the plurality of acetabular cups have a normalized radial stiffness.
Yet another advantage is that it is possible to have an acetabular cup which has a radial stiffness which is greater at the rim than at the pole portion.
The above-mentioned and other features and advantages of this invention, and the manner of attaining them, will become more apparent and the invention will be better understood by reference to the following description of embodiments of the invention taken in conjunction with the accompanying drawings, wherein:
Fig. 1 is a perspective view of one embodiment of an acetabular cup of the present invention;
Fig. 2 is an exploded, perspective view of the acetabular cup of Fig. 1, and further including a perspective view of a shell;
Fig. 3 is a sectional view of the acetabular cup of Fig.
1, taken along line 3-3:

Fig. 4 is a sectional view of another embodiment of the acetabular cup of the present invention, having a different predetermined penetration depth;
Fig. 5 is a simplified fragmentary, sectional view illustrating penetration of the polymeric cup into the porous metal backing;
Fig. 6 is a graphical illustration of the relationship between the interface strength of the acetabular cup and the penetration depth of the polymeric cup into the metal backing;
Fig. 7 is a sectional view of another embodiment of the acetabular cup of the present invention, having a penetration depth which is larger at the rim of the backing and lesser at the pole portion of the backing; and Fig. 8 is a simplified graphical illustration of one method of determining the interface strength between the metal backing and the polymeric cup.
Corresponding reference characters indicate corresponding parts throughout the several views. The exemplifications set out herein illustrate one preferred embodiment of the invention, in one form, and such exemplifications are not to be construed as limiting the scope of the invention in any manner.

~~GB~~~
....
DETAILED DESCRIPTION OF THE INVENTION
Referring now to the drawings and more particularly to Figs. 1-3, there is shown an acetabular cup 10 of the present invention, which generally includes a polymeric cup 12, metal backing 14 and shell 16. Shell 16 is constructed of a filler material which temporarily occupies a predetermined cross-sectional thickness of metal backing 14 during the manufacturing process, as will be described hereinafter.
Shell 16 can be constructed, e.g., of an amorphous polymer such as polysulfone, polyethersulfone, polycarbonate, polyetherimide, or polymethylmethacrylate.
Polymeric cup 12 includes a cavity 18 for receiving a femoral head. Beveled edge 20 allows proper articulation of the femoral head within cavity 18. An outer peripheral flange 22 overlies a portion of metal backing 14 and extends toward the outside diameter of the rim of metal backing 14.
Polymeric cup 12 is formed of a polymeric material having a relatively low friction coefficient and suitable wear characteristics, such as high density polyethylene (HPD) or ultra-high-molecular weight polyethylene (UHMWP). In the embodiment shown in the drawings, polymeric cup 12 is formed of a linear UHMWP having a molecular weight of between 1 to 8 million.
Metal backing 14 is attached to polymeric cup 12 and has a thickness "t" extending between a radially inner portion 13 216851p and radially outer portion 15. Metal backing 14 is substantially axisymmetric about an axis 24 at a pole portion 26, and has a maximum outside diameter at a rim 28. In the embodiment shown, metal backing 14 is constructed of fiber metal which is sintered together. The metal fibers occupy about 50 percent of the volume of metal backing 14, with the remaining volume being initially occupied by air. Metal backing 14 is thus of porous construction and the spaces between the metal fibers define interstitial pores of metal backing 14.
In general terms, the manufacture of acetabular cup 10 is as follows: First, porous metal backing 14 is formed using known methods of construction, such as sintering a fiber metal. Backing 14 is placed within shell 16 which is thereafter diffused into metal backing 14 a predetermined thickness. For details of such a process, reference is made to U.S. Patent No. 5,236,457, which is assigned to the assignee of the present invention and incorporated herein by reference.
Metal backing 14, including shell 16 diffused therein, is placed within a mold and a polymeric material is injected into the mold to define and form polymeric cup 12. Since shell 16 only penetrates a predetermined depth into radially outer portion 15 of metal backing 14, the polymeric material which is injected into the mold also penetrates into radially inner portion 13 of metal backing 14, as indicated by penetration depth 30 (Fig. 3). Shell 16 is then dissolved from metal backing 14 using a suitable solvent, such that a porous surface exists at the radially outer portion of metal backing 14 which is suitable for allowing ingrowth of bone tissue therein.
Referring now to Figs. 5, 6 and 8, the interrelationship between polymeric cup 12 and metal backing 14 will be described in further detail. Fig. 5 is a simplified view illustrating the general concept of the interface strength between polymeric cup 12 and metal backing 14. Broadly speaking, penetration depth 30 must be of sufficient magnitude such that polymeric cup 12 cannot be separated from metal backing 14 without permanent deformation of polymeric cup 12.
More particularly, metal backing 14 includes a plurality of metal fibers 32 which are disposed at random orientation, (but which are shown at predetermined and organized orientations in Fig. 5 for ease of illustration). The spaces between metal fibers 32 define interstitial pores 34 which are sized to allow penetration of polymeric cup 12 and bone tissue (not shown). When polymeric cup 12 is molded into metal backing 14, a plurality of fingers 36 are created and penetrate into interstitial pores 34 of metal backing 14. If penetration depth 30 is not of sufficient magnitude and a tensile or separation force is applied between polymeric cup 12 and metal backing 14, fingers 36 will simply be stripped out of interstitial pores 34, resulting in a relatively low interface strength between polymeric cup 12 and metal backing 14.
On the other hand, polymeric cup 12 has an inherent tensile strength associated with the particular material from which polymeric cup 12 is formed. If penetration depth 30 of fingers 36 into interstitial pores 34 is of sufficient magnitude, then fingers 36 will not be stripped from interstitial pores 34 when a separation force is applied generally perpendicular to interface 38. Rather, fingers 36 will tear along interface 38, resulting in permanent deformation of polymeric cup 12. As is known, the tensile strength of fingers 36 is the same as that of the tensile strength of the remainder of polymeric cup 12. Moreover, the tensile strength of a material is a function of the tensile force applied to a material and the area over which the tensile force is applied. The area over which the separation force between polymeric cup 12 and metal backing 14 is applied is not the total area therebetween, but rather is the effective area therebetween or summation of all the cross-sectional areas of fingers 36. For the particular embodiment shown in Figs. 1-3, and as indicated above, metal backing 14 has a volumetric porosity percentage of about 50 percent.
Accordingly, the effective area of metal backing 14 at interface 38 is approximately equal to the total area of metal backing 14 at interface 8, multiplied by 0.50.
Assuming ideal conditions such that penetration depth 30 for each and every finger 36 is sufficiently large, then each finger 36 would tear on application of a separation force between polymeric cup 12 and metal backing 14 at interface 38.
However, it is possible that penetration depth 30 is only of a magnitude such that the majority of fingers 36 tear when a separation force is applied, while a much lesser number of fingers 36 are stripped out of interstitial pores 34.
Accordingly, the interface strength between polymeric cup 12 and metal backing 14 may be between 70 to 100 percent of the tensile strength of polymeric cup 12. Further, penetration depth 30 and interstitial pore size 34 could be such that for a particular acetabular cup, the interface strength between polymeric cup 12 and metal backing 14 falls within the range of between 70 to 80 percent, 80 to 90 percent and/or 90 to 100 percent of the tensile strength of the material from which polymeric cup 12 is formed.
Referring now to Fig. 6, the interrelationship between the interface strength of polymeric cup 12 and metal backing 14 along interface 38, versus the penetration depth of fingers 36 into metal backing 14 is shown in graphical form. The graphical illustration corresponds to the embodiment of Figs.
1-3. Horizontal line 40 corresponds to the tensile strength of ultra-high-molecular weight polyethylene from which 21~85j0 polymeric cup 12 of Figs. 1-3 is formed, and is the maximum interface strength possible between polymeric cup 12 and metal backing 14. As indicated, the interface strength between polymeric cup 12 and metal backing 14 increases with a corresponding increased penetration depth, and reaches a maximum value at a penetration depth of about 0.050 inch, corresponding to the tensile strength of UHMWP.
Fig. 8 is a simple block diagram, illustrating a method of determining an interface strength between polymeric cup 12 and metal backing 14. One possible way to determine the interface strength is to cut a small portion or test sample from acetabular cup 10 and attach a suitable device to each of polymeric cup 12 and metal backing 14 for applying a tensile force F in a direction generally perpendicular to interface 38. Tensile force F is increased in magnitude until polymeric cup 12 separates from metal backing 14 along interface 38.
The numeric value of the tensile force F required to separate polymeric cup 12 from metal backing 14 is divided by the effective area of metal backing 14 at interface 38. The effective area is calculated by multiplying the cross sectional area of the test sample at interface 38 with the volumetric porosity percentage of metal backing 14, e.g., 50 percent.
Fig. 4 illustrates another embodiment of an acetabular cup 42 of the present invention. Acetabular cup 42 is similar Zi~85i~
to the embodiment shown in Fig. 3, but has a different outside diameter at rim 44 and also.has a different penetration depth 46. Because acetabular cup 42 has a different outside diameter at rim 44, the stiffness of acetabular cup 42 in a radial direction would normally be different than that of acetabular cup 10 shown in Fig. 3. By varying penetration depth 46 of polymeric cup 48 into metal backing 50, it is possible to substantially normalize, i.e., equalize, the stiffness between acetabular cup 10 and acetabular cup 42 in a radial direction. That is, each of acetabular cup 10 and acetabular cup 42 have substantially the same stiffness in a radial direction.
In the embodiment shown in Fig. 4, penetration depth 46 is different from penetration depth 30 shown in Fig. 3 to thereby normalize the stiffnesses between acetabular cup 10 and acetabular cup 42. However, it is to be understood that it is likewise possible to maintain a common penetration depth between acetabular cups having different diameters, and vary the thickness of the metal backing from one cup to another to thereby normalize the radial stiffness.
Referring now to Fig. 7, another embodiment of an acetabular cup 52 of the present invention is shown. In contrast with the embodiments shown in Figs. 3 and 4, the embodiment shown in Fig. 7 has a penetration depth 54 which is greater at a rim 56 then at a pole portion 58. In theory, 2id8510 when acetabular cup 52 is press fit into an acetabulum of a pelvic bone, the radially compressive forces exerted against acetabular cup 52 by the pelvic bone are greater at rim 56 than at pole portion 58. By having a greater penetration depth 54 at rim 56 than at pole portion 58, it is possible to construct acetabular cup 52 such that the radial stiffness at rim 56 is greater than the radial stiffness at pole portion 58.
While this invention has been described as having a preferred design, the present invention can be further modified within the spirit and scope of this disclosure. This application is therefore intended to cover any variations, uses, or adaptations of the invention using its general principles. Further, this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains and which fall within the limits of the appended claims.

Claims

Claims:
1. A kit comprising first and second acetabular cup prostheses, each of said first and second acetabular cups having a different outside diameter at a rim thereof, each of said first acetabular cup and said second acetabular cup comprising:
a polymeric cup having a cavity for receiving a femoral head; and a backing disposed about and attached to said polymeric cup, said backing having a thickness and further having a porous construction defining interstitial pores, said polymeric cup being attached to said backing by penetrating into said pores a predetermined penetration depth;
at least one of said backing thickness and said penetration depth varying between said first acetabular cup and said second acetabular cup, whereby each of said first acetabular cup and said second acetabular cup have substantially the same stiffness in a radial direction.
CA 2168510 1995-02-14 1996-01-31 Acetabular cup Expired - Fee Related CA2168510C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US08388089 US5879398A (en) 1995-02-14 1995-02-14 Acetabular cup
US08/388,089 1995-02-14

Publications (2)

Publication Number Publication Date
CA2168510A1 true CA2168510A1 (en) 1996-08-15
CA2168510C true CA2168510C (en) 2007-01-16

Family

ID=23532634

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2168510 Expired - Fee Related CA2168510C (en) 1995-02-14 1996-01-31 Acetabular cup

Country Status (6)

Country Link
US (1) US5879398A (en)
EP (1) EP0727195B1 (en)
JP (1) JP3875301B2 (en)
CN (1) CN1135321A (en)
CA (1) CA2168510C (en)
DE (2) DE69622773D1 (en)

Families Citing this family (145)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8172897B2 (en) * 1997-04-15 2012-05-08 Advanced Cardiovascular Systems, Inc. Polymer and metal composite implantable medical devices
US20050283229A1 (en) * 1997-04-15 2005-12-22 Steve Dugan Coatings for controlling erosion of a substrate of an implantable medical device
US6240616B1 (en) * 1997-04-15 2001-06-05 Advanced Cardiovascular Systems, Inc. Method of manufacturing a medicated porous metal prosthesis
US7255712B1 (en) * 1997-04-15 2007-08-14 Active Implants Corporation Bone growth promoting implant
GB9827879D0 (en) * 1998-12-17 1999-02-10 Benoist Girard & Cie Prosthetic acetabulum fixing plate
US7807211B2 (en) * 1999-09-03 2010-10-05 Advanced Cardiovascular Systems, Inc. Thermal treatment of an implantable medical device
US6361566B1 (en) * 2000-03-10 2002-03-26 Bashar Al-Hafez Hip prosthesis
US6805898B1 (en) 2000-09-28 2004-10-19 Advanced Cardiovascular Systems, Inc. Surface features of an implantable medical device
US8123814B2 (en) 2001-02-23 2012-02-28 Biomet Manufacturing Corp. Method and appartus for acetabular reconstruction
FR2827154B1 (en) * 2001-07-16 2004-04-30 Jean Yves Lazennec acetabular implant for hip prosthesis
US6682567B1 (en) 2001-09-19 2004-01-27 Biomet, Inc. Method and apparatus for providing a shell component incorporating a porous ingrowth material and liner
DE60327626D1 (en) * 2002-05-23 2009-06-25 Active Implants Corp Joints and dental implants
EP2145604A1 (en) * 2001-12-04 2010-01-20 Active Implants Corporation Cushion bearing implants for load bearing applications
US20030220696A1 (en) * 2002-05-23 2003-11-27 Levine David Jerome Implantable porous metal
US7537664B2 (en) 2002-11-08 2009-05-26 Howmedica Osteonics Corp. Laser-produced porous surface
US20040243148A1 (en) * 2003-04-08 2004-12-02 Wasielewski Ray C. Use of micro- and miniature position sensing devices for use in TKA and THA
US7938861B2 (en) * 2003-04-15 2011-05-10 Depuy Products, Inc. Implantable orthopaedic device and method for making the same
USRE45744E1 (en) 2003-12-01 2015-10-13 Abbott Cardiovascular Systems Inc. Temperature controlled crimping
US20050118344A1 (en) * 2003-12-01 2005-06-02 Pacetti Stephen D. Temperature controlled crimping
EP2338442B1 (en) 2003-12-11 2013-01-30 Isto Technologies Inc. Particulate cartilage system
CN1980615B (en) 2004-03-31 2013-02-06 赛昂整形外科股份公司 Double shell implant for cementless anchorage of joint prostheses
US20060039949A1 (en) * 2004-08-20 2006-02-23 Nycz Jeffrey H Acetabular cup with controlled release of an osteoinductive formulation
US7918896B2 (en) 2004-09-15 2011-04-05 Wright Medical Technology, Inc. Unitary acetabular cup prosthesis with extension for deficient acetabulum
GB0422666D0 (en) * 2004-10-12 2004-11-10 Benoist Girard Sas Prosthetic acetabular cups
US20060147332A1 (en) 2004-12-30 2006-07-06 Howmedica Osteonics Corp. Laser-produced porous structure
CA2769658C (en) * 2005-02-18 2016-01-12 Richard D. Komistek Smart joint implant sensors
US8266780B2 (en) * 2005-04-21 2012-09-18 Biomet Manufacturing Corp. Method and apparatus for use of porous implants
US7597715B2 (en) * 2005-04-21 2009-10-06 Biomet Manufacturing Corp. Method and apparatus for use of porous implants
US8292967B2 (en) * 2005-04-21 2012-10-23 Biomet Manufacturing Corp. Method and apparatus for use of porous implants
US8021432B2 (en) 2005-12-05 2011-09-20 Biomet Manufacturing Corp. Apparatus for use of porous implants
US8066778B2 (en) * 2005-04-21 2011-11-29 Biomet Manufacturing Corp. Porous metal cup with cobalt bearing surface
JP5314423B2 (en) 2005-08-18 2013-10-16 ジンマー ゲーエムベーハー A method of forming an ultra-high molecular weight polyethylene articles and ultrahigh molecular weight polyethylene article
WO2007025290A3 (en) * 2005-08-26 2007-10-18 H Davis Adkisson Iv Implants and methods for repair, replacement and treatment of joint disease
US8728387B2 (en) * 2005-12-06 2014-05-20 Howmedica Osteonics Corp. Laser-produced porous surface
EP1803513B1 (en) * 2005-12-30 2017-03-29 Howmedica Osteonics Corp. Method of manufacturing implants using laser
US7635447B2 (en) * 2006-02-17 2009-12-22 Biomet Manufacturing Corp. Method and apparatus for forming porous metal implants
US9271744B2 (en) 2010-09-29 2016-03-01 Biomet Manufacturing, Llc Patient-specific guide for partial acetabular socket replacement
US8241293B2 (en) 2006-02-27 2012-08-14 Biomet Manufacturing Corp. Patient specific high tibia osteotomy
US8377066B2 (en) 2006-02-27 2013-02-19 Biomet Manufacturing Corp. Patient-specific elbow guides and associated methods
US8568487B2 (en) 2006-02-27 2013-10-29 Biomet Manufacturing, Llc Patient-specific hip joint devices
US8858561B2 (en) 2006-06-09 2014-10-14 Blomet Manufacturing, LLC Patient-specific alignment guide
US8282646B2 (en) * 2006-02-27 2012-10-09 Biomet Manufacturing Corp. Patient specific knee alignment guide and associated method
US9345548B2 (en) 2006-02-27 2016-05-24 Biomet Manufacturing, Llc Patient-specific pre-operative planning
US8070752B2 (en) 2006-02-27 2011-12-06 Biomet Manufacturing Corp. Patient specific alignment guide and inter-operative adjustment
US9113971B2 (en) * 2006-02-27 2015-08-25 Biomet Manufacturing, Llc Femoral acetabular impingement guide
US8608748B2 (en) 2006-02-27 2013-12-17 Biomet Manufacturing, Llc Patient specific guides
US8632547B2 (en) 2010-02-26 2014-01-21 Biomet Sports Medicine, Llc Patient-specific osteotomy devices and methods
US8591516B2 (en) 2006-02-27 2013-11-26 Biomet Manufacturing, Llc Patient-specific orthopedic instruments
US8133234B2 (en) 2006-02-27 2012-03-13 Biomet Manufacturing Corp. Patient specific acetabular guide and method
US20110046735A1 (en) * 2006-02-27 2011-02-24 Biomet Manufacturing Corp. Patient-Specific Implants
US8535387B2 (en) 2006-02-27 2013-09-17 Biomet Manufacturing, Llc Patient-specific tools and implants
US9173661B2 (en) 2006-02-27 2015-11-03 Biomet Manufacturing, Llc Patient specific alignment guide with cutting surface and laser indicator
US8864769B2 (en) 2006-02-27 2014-10-21 Biomet Manufacturing, Llc Alignment guides with patient-specific anchoring elements
US9918740B2 (en) 2006-02-27 2018-03-20 Biomet Manufacturing, Llc Backup surgical instrument system and method
US9241745B2 (en) 2011-03-07 2016-01-26 Biomet Manufacturing, Llc Patient-specific femoral version guide
US9289253B2 (en) * 2006-02-27 2016-03-22 Biomet Manufacturing, Llc Patient-specific shoulder guide
US8603180B2 (en) 2006-02-27 2013-12-10 Biomet Manufacturing, Llc Patient-specific acetabular alignment guides
US9339278B2 (en) 2006-02-27 2016-05-17 Biomet Manufacturing, Llc Patient-specific acetabular guides and associated instruments
US8608749B2 (en) * 2006-02-27 2013-12-17 Biomet Manufacturing, Llc Patient-specific acetabular guides and associated instruments
US8298237B2 (en) 2006-06-09 2012-10-30 Biomet Manufacturing Corp. Patient-specific alignment guide for multiple incisions
US9795399B2 (en) 2006-06-09 2017-10-24 Biomet Manufacturing, Llc Patient-specific knee alignment guide and associated method
US8092465B2 (en) 2006-06-09 2012-01-10 Biomet Manufacturing Corp. Patient specific knee alignment guide and associated method
DE102007031670B4 (en) * 2006-08-04 2017-08-31 Ceramtec Gmbh Porous outer shell of metal pans to reduce pan deformation in press-fit situations
DE102007031669A1 (en) * 2006-08-04 2008-09-11 Ceramtec Ag Innovative Ceramic Engineering Asymmetric design of acetabular cup to reduce the deformations
US8147861B2 (en) 2006-08-15 2012-04-03 Howmedica Osteonics Corp. Antimicrobial implant
US9403213B2 (en) * 2006-11-13 2016-08-02 Howmedica Osteonics Corp. Preparation of formed orthopedic articles
US8163549B2 (en) 2006-12-20 2012-04-24 Zimmer Orthobiologics, Inc. Method of obtaining viable small tissue particles and use for tissue repair
US20080154233A1 (en) * 2006-12-20 2008-06-26 Zimmer Orthobiologics, Inc. Apparatus for delivering a biocompatible material to a surgical site and method of using same
US8328873B2 (en) 2007-01-10 2012-12-11 Biomet Manufacturing Corp. Knee joint prosthesis system and method for implantation
US8163028B2 (en) 2007-01-10 2012-04-24 Biomet Manufacturing Corp. Knee joint prosthesis system and method for implantation
US8187280B2 (en) 2007-10-10 2012-05-29 Biomet Manufacturing Corp. Knee joint prosthesis system and method for implantation
JP5448842B2 (en) 2007-01-10 2014-03-19 バイオメト マニファクチャリング コーポレイションBiomet Manufacturing Corp. Knee joint prosthesis system and embedding method
US8562616B2 (en) 2007-10-10 2013-10-22 Biomet Manufacturing, Llc Knee joint prosthesis system and method for implantation
US8664290B2 (en) 2007-04-10 2014-03-04 Zimmer, Inc. Antioxidant stabilized crosslinked ultra-high molecular weight polyethylene for medical device applications
US20080319137A1 (en) 2007-04-10 2008-12-25 Zimmer, Inc. Antioxidant stabilized crosslinked ultra-high molecular weight polyethylene for medical device applications
CA2684040C (en) 2007-04-12 2016-12-06 Isto Technologies, Inc. Method of forming an implant using a mold that mimics the shape of the tissue defect site and implant formed therefrom
US9907659B2 (en) 2007-04-17 2018-03-06 Biomet Manufacturing, Llc Method and apparatus for manufacturing an implant
US7967868B2 (en) 2007-04-17 2011-06-28 Biomet Manufacturing Corp. Patient-modified implant and associated method
US8407067B2 (en) 2007-04-17 2013-03-26 Biomet Manufacturing Corp. Method and apparatus for manufacturing an implant
US8473305B2 (en) * 2007-04-17 2013-06-25 Biomet Manufacturing Corp. Method and apparatus for manufacturing an implant
US20080257363A1 (en) * 2007-04-17 2008-10-23 Biomet Manufacturing Corp. Method And Apparatus For Manufacturing An Implant
US7780740B2 (en) * 2007-05-21 2010-08-24 Active Implants Corporation Methods, systems, and apparatus for implanting prosthetic devices into cartilage
WO2009014718A1 (en) 2007-07-24 2009-01-29 Porex Corporation Porous laser sintered articles
WO2009034429A3 (en) * 2007-09-12 2009-12-17 Eurocoating S.P.A. Method for coating prosthesis elements and elements obtainable with the method
WO2009042150A1 (en) * 2007-09-25 2009-04-02 Biomet Manufacturing Corp. Cementless tibial tray
US8632600B2 (en) 2007-09-25 2014-01-21 Depuy (Ireland) Prosthesis with modular extensions
US9204967B2 (en) 2007-09-28 2015-12-08 Depuy (Ireland) Fixed-bearing knee prosthesis having interchangeable components
US20110035018A1 (en) * 2007-09-25 2011-02-10 Depuy Products, Inc. Prosthesis with composite component
US8715359B2 (en) * 2009-10-30 2014-05-06 Depuy (Ireland) Prosthesis for cemented fixation and method for making the prosthesis
CA2704032C (en) * 2007-10-29 2016-10-18 Zimmer, Inc. Medical implants and methods for delivering biologically active agents
WO2009097412A3 (en) * 2008-01-30 2010-05-14 Zimmer, Inc. Othopedic component of low stiffness
GB0809721D0 (en) * 2008-05-28 2008-07-02 Univ Bath Improvements in or relating to joints and/or implants
US8029566B2 (en) * 2008-06-02 2011-10-04 Zimmer, Inc. Implant sensors
US8268383B2 (en) * 2008-09-22 2012-09-18 Depuy Products, Inc. Medical implant and production thereof
CN102307945B (en) 2008-11-20 2015-07-01 捷迈有限责任公司 Polyethylene materials
US8123815B2 (en) 2008-11-24 2012-02-28 Biomet Manufacturing Corp. Multiple bearing acetabular prosthesis
US8170641B2 (en) * 2009-02-20 2012-05-01 Biomet Manufacturing Corp. Method of imaging an extremity of a patient
US8308810B2 (en) 2009-07-14 2012-11-13 Biomet Manufacturing Corp. Multiple bearing acetabular prosthesis
DE102009028503B4 (en) 2009-08-13 2013-11-14 Biomet Manufacturing Corp. Resektionsschablone for resection of bone, to methods for producing such Resektionsschablone and Operationsset for performing knee replacement surgeries
CA2776169A1 (en) * 2009-10-07 2011-04-14 Bio2 Technologies, Inc. Devices and methods for tissue engineering
ES2565212T3 (en) * 2010-02-26 2016-04-01 Limacorporate S.P.A. integrated prosthetic element
US9066727B2 (en) 2010-03-04 2015-06-30 Materialise Nv Patient-specific computed tomography guides
US8715356B2 (en) 2010-04-13 2014-05-06 Biomet Manufacturing, Llc Prosthetic having a modular soft tissue fixation mechanism
US8399535B2 (en) 2010-06-10 2013-03-19 Zimmer, Inc. Polymer [[s]] compositions including an antioxidant
US8468673B2 (en) 2010-09-10 2013-06-25 Bio2 Technologies, Inc. Method of fabricating a porous orthopedic implant
JP5613902B2 (en) * 2010-11-10 2014-10-29 三菱マテリアル株式会社 The porous implant material
US9034048B2 (en) * 2011-01-26 2015-05-19 John A. Choren Orthopaedic implants and methods of forming implant structures
US8715289B2 (en) 2011-04-15 2014-05-06 Biomet Manufacturing, Llc Patient-specific numerically controlled instrument
US9675400B2 (en) 2011-04-19 2017-06-13 Biomet Manufacturing, Llc Patient-specific fracture fixation instrumentation and method
US8956364B2 (en) 2011-04-29 2015-02-17 Biomet Manufacturing, Llc Patient-specific partial knee guides and other instruments
US8668700B2 (en) 2011-04-29 2014-03-11 Biomet Manufacturing, Llc Patient-specific convertible guides
US8532807B2 (en) 2011-06-06 2013-09-10 Biomet Manufacturing, Llc Pre-operative planning and manufacturing method for orthopedic procedure
US9084618B2 (en) 2011-06-13 2015-07-21 Biomet Manufacturing, Llc Drill guides for confirming alignment of patient-specific alignment guides
US8764760B2 (en) 2011-07-01 2014-07-01 Biomet Manufacturing, Llc Patient-specific bone-cutting guidance instruments and methods
US8597365B2 (en) 2011-08-04 2013-12-03 Biomet Manufacturing, Llc Patient-specific pelvic implants for acetabular reconstruction
US9295497B2 (en) 2011-08-31 2016-03-29 Biomet Manufacturing, Llc Patient-specific sacroiliac and pedicle guides
US9066734B2 (en) 2011-08-31 2015-06-30 Biomet Manufacturing, Llc Patient-specific sacroiliac guides and associated methods
US9386993B2 (en) 2011-09-29 2016-07-12 Biomet Manufacturing, Llc Patient-specific femoroacetabular impingement instruments and methods
US9451973B2 (en) 2011-10-27 2016-09-27 Biomet Manufacturing, Llc Patient specific glenoid guide
US9301812B2 (en) 2011-10-27 2016-04-05 Biomet Manufacturing, Llc Methods for patient-specific shoulder arthroplasty
KR20130046337A (en) 2011-10-27 2013-05-07 삼성전자주식회사 Multi-view device and contol method thereof, display apparatus and contol method thereof, and display system
US9554910B2 (en) 2011-10-27 2017-01-31 Biomet Manufacturing, Llc Patient-specific glenoid guide and implants
US9237950B2 (en) 2012-02-02 2016-01-19 Biomet Manufacturing, Llc Implant with patient-specific porous structure
US9364896B2 (en) 2012-02-07 2016-06-14 Medical Modeling Inc. Fabrication of hybrid solid-porous medical implantable devices with electron beam melting technology
US9180010B2 (en) 2012-04-06 2015-11-10 Howmedica Osteonics Corp. Surface modified unit cell lattice structures for optimized secure freeform fabrication
US9135374B2 (en) 2012-04-06 2015-09-15 Howmedica Osteonics Corp. Surface modified unit cell lattice structures for optimized secure freeform fabrication
CN102824232B (en) * 2012-08-28 2015-07-22 中国科学院宁波材料技术与工程研究所 Anti-oxidation artificial joint prosthesis and preparation method thereof
US9204977B2 (en) 2012-12-11 2015-12-08 Biomet Manufacturing, Llc Patient-specific acetabular guide for anterior approach
US9060788B2 (en) 2012-12-11 2015-06-23 Biomet Manufacturing, Llc Patient-specific acetabular guide for anterior approach
US9839438B2 (en) 2013-03-11 2017-12-12 Biomet Manufacturing, Llc Patient-specific glenoid guide with a reusable guide holder
US9579107B2 (en) 2013-03-12 2017-02-28 Biomet Manufacturing, Llc Multi-point fit for patient specific guide
US9826981B2 (en) 2013-03-13 2017-11-28 Biomet Manufacturing, Llc Tangential fit of patient-specific guides
US9498233B2 (en) 2013-03-13 2016-11-22 Biomet Manufacturing, Llc. Universal acetabular guide and associated hardware
US9517145B2 (en) 2013-03-15 2016-12-13 Biomet Manufacturing, Llc Guide alignment system and method
US9237953B2 (en) * 2013-03-15 2016-01-19 Depuy (Ireland) Mechanical assembly of pegs to prosthesis
CN103222904B (en) * 2013-04-27 2015-10-14 上海交通大学 Distributed acetabular prosthesis
US9708467B2 (en) 2013-10-01 2017-07-18 Zimmer, Inc. Polymer compositions comprising one or more protected antioxidants
US9610164B2 (en) * 2014-02-03 2017-04-04 Biomet Manufacturing, Llc Stiffening structure in a prosthetic member
US9408616B2 (en) 2014-05-12 2016-08-09 Biomet Manufacturing, Llc Humeral cut guide
US9561040B2 (en) 2014-06-03 2017-02-07 Biomet Manufacturing, Llc Patient-specific glenoid depth control
US9839436B2 (en) 2014-06-03 2017-12-12 Biomet Manufacturing, Llc Patient-specific glenoid depth control
US9833245B2 (en) 2014-09-29 2017-12-05 Biomet Sports Medicine, Llc Tibial tubercule osteotomy
US9826994B2 (en) 2014-09-29 2017-11-28 Biomet Manufacturing, Llc Adjustable glenoid pin insertion guide
US9848986B2 (en) * 2014-12-03 2017-12-26 Smith & Nephew, Inc. Joint replacement component with integrated fixation pads
US9820868B2 (en) 2015-03-30 2017-11-21 Biomet Manufacturing, Llc Method and apparatus for a pin apparatus

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3130732C2 (en) * 1981-08-03 1989-04-20 Waldemar Link Gmbh & Co, 2000 Hamburg, De
US4479271A (en) * 1981-10-26 1984-10-30 Zimmer, Inc. Prosthetic device adapted to promote bone/tissue ingrowth
US4563778A (en) * 1983-02-23 1986-01-14 Minnesota Mining And Manufacturing Company Prosthetic acetabular cup
EP0149975A1 (en) * 1984-01-11 1985-07-31 Robert Mathys Co Cup for hip joint prosthesis
DE3569076D1 (en) * 1985-01-25 1989-05-03 Sulzer Ag Synthetic plastics endosseous implant
DE3666341D1 (en) * 1985-07-15 1989-11-23 Sulzer Ag Hip joint cup cementlessly anchorable in the pelvis
EP0235606B1 (en) * 1986-02-18 1990-06-13 Gebrüder Sulzer Aktiengesellschaft Securing an endoprosthesis for an acetabular cup in a bed of bone cement
EP0296335B1 (en) * 1987-06-23 1991-08-14 Gebrüder Sulzer Aktiengesellschaft Metallic bone implant
US4969910A (en) * 1987-11-11 1990-11-13 Sulzer Brothers Limited Acetabular cup prosthesis
EP0331625B1 (en) * 1988-03-01 1991-07-24 Gebrüder Sulzer Aktiengesellschaft Hemispherical hip cotyl
GB2216425B (en) * 1988-03-22 1991-10-16 Bristol Myers Co A bone implant
EP0338976A1 (en) * 1988-04-21 1989-10-25 Gebrüder Sulzer Aktiengesellschaft Plastic bone implant
FR2639218A1 (en) * 1988-11-23 1990-05-25 Icp Sa Acetabular element
DE59002570D1 (en) * 1990-03-13 1993-10-07 Sulzer Ag Einzementierbare acetabulum of plastic.
JP3451257B2 (en) * 1991-10-07 2003-09-29 ロシュ ダイアグノスティクス コーポレーション Of the low-rigidity femoral hip implant
FR2685192B1 (en) * 1991-12-24 1994-01-28 Osteal Medical Laboratoires Acetabulum prosthesis of metal for hip joint.
US5236457A (en) * 1992-02-27 1993-08-17 Zimmer, Inc. Method of making an implant having a metallic porous surface
US5370698A (en) * 1992-04-16 1994-12-06 Clemson University Isoelastic implants with improved anchorage means
FR2698782B3 (en) * 1992-12-09 1995-02-17 Biomecanique Integree Acetabulum in total hip replacement.

Also Published As

Publication number Publication date Type
DE69622773T2 (en) 2002-12-05 grant
JPH08252273A (en) 1996-10-01 application
EP0727195B1 (en) 2002-08-07 grant
CN1135321A (en) 1996-11-13 application
JP3875301B2 (en) 2007-01-31 grant
US5879398A (en) 1999-03-09 grant
EP0727195A2 (en) 1996-08-21 application
EP0727195A3 (en) 1997-05-07 application
DE69622773D1 (en) 2002-09-12 grant
CA2168510A1 (en) 1996-08-15 application

Similar Documents

Publication Publication Date Title
Carter et al. Stress distributions in the acetabular region—II. Effects of cement thickness and metal backing of the total hip acetabular component
EP0307241B1 (en) Surgical prosthetic implant
US7022139B2 (en) Artificial intervertebral disc having limited rotation using a captured ball and socket joint with a solid ball and retaining cap
US4159546A (en) Intraocular lens
US6149688A (en) Artificial bone graft implant
US6224630B1 (en) Implantable tissue repair device
US5766253A (en) Spinal fusion device
US5769899A (en) Cartilage repair unit
US4011602A (en) Porous expandable device for attachment to bone tissue
US7160327B2 (en) Axially compressible artificial intervertebral disc having limited rotation using a captured ball and socket joint with a solid ball and compression locking post
US5961552A (en) Internally configured prosthesis
US5683465A (en) Artificial intervertebral disk prosthesis
US4986834A (en) Load sharing femoral hip implant
US5571191A (en) Artificial facet joint
US6569201B2 (en) Hybrid composite interbody fusion device
US6974479B2 (en) System and method for blocking and/or retaining a prosthetic spinal implant
US5071437A (en) Artificial disc
US5879406A (en) Artificial joint bioprosthesis for mitigation of wear
US5108432A (en) Porous fixation surface
US6960232B2 (en) Artificial intervertebral disc
EP0814731B1 (en) Cartilage repair unit
US20030023306A1 (en) Vertebral implant for promoting arthrodesis of the spine
US4650489A (en) Prosthetic device for implantation in bone
US5782929A (en) Acetabular shell having sintered screw hole plugs
US7004971B2 (en) Annular nucleus pulposus replacement

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed