US3806961A - Phosthetic patella implant - Google Patents

Phosthetic patella implant Download PDF

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Publication number
US3806961A
US3806961A US00332655A US33265573A US3806961A US 3806961 A US3806961 A US 3806961A US 00332655 A US00332655 A US 00332655A US 33265573 A US33265573 A US 33265573A US 3806961 A US3806961 A US 3806961A
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patella
base
guide groove
runner
prosthetic implant
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US00332655A
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M Muller
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Sulzer AG
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Sulzer AG
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/38—Joints for elbows or knees
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/38—Joints for elbows or knees
    • A61F2/3877—Patellae or trochleae

Definitions

  • the implant includes an annular sector having a guide groove for implanting in the femur and a slidable -member for implanting in the patella which member has a manner of arcuate shape for sliding in the guide groove of the annular sector.
  • the runner also has a' raised projection to provide for tilting movementsof the patella.
  • the slidable member is asymmetrical about a central plane so as to provide for two different implant positions.
  • the invention provides a prosthetic implant for guiding a patella on a femur which includes an annular sector for implanting in the femur and a member for implanting in the patella.
  • the annular sector has a guide groove in an arcuate peripheral surface while the other member has a runner mounted in raised relation on a peripheral surface for sliding in the guide groove.
  • the runner which can also be in the form of a skid or guide is of complementary shape to the shape of the guide groove to facilitate sliding.
  • one of the two parts of the prosthesis is made of a plastics, e.g. polyethylene, which is compatible with the human organism, while the other part is made of one of the known metal alloys used for prosthetic implant.
  • Both parts can, of course, be made of metal, in which event, as another variant, one of the two parts'may'be plastics coated.
  • both parts can be made from appropriate plastics, e.g. polyethylene or a polyester.
  • the runner can be disposed on the periphery of a circle segment of a cylindrical disc.
  • the circle segment of the disc is asymmetrical relative to the perpendicular passing through the center of its base. The advantage of this feature is that the prosthesis can be fitted in the patella in two different positions 180 apart from one another, the runner having more curvature in one of these positions than in the other.
  • the sliding member can be pinned therein by means of two pins.
  • the pins can each be at at least substantially the same distance from the outermost boundary of the segment as measured in a direction parallel to the base.
  • FIG. 1 diagrammatically illustrates a front elevational view of an annular sector formed with a guide groove and inserted in a femur in accordance with the invention
  • F IG. 2 diagrammatically illustrates a side elevational view of the sector, of FIG. 1 in a femur;
  • FIG. 3 illustrates a view taken on line III-III of FIG. 2, the bone which surrounds the sector having been omitted;
  • FIG. 4 illustrates a side elevation of a circular disc and an arcuate segment which is cut out to form a sliding member according to the invention
  • FIG. 5 illustrates a side elevational view of the finished arcuate segment
  • FIG. 6 illustrates a diagrammatic plan view of an arcuate segment after being fitted into a' patella.
  • a guiding groove 1, shown in approximately normal size, is disposed in an annular or arcuate sector 2 comprising a rim-like disc and representing a cut-out of approximately one-third of a complete circle (about 105).
  • the sector 2 includes side flanks 3, 4 which are formed with projections and recesses (not shown) for improved anchorage, provided basically by a bone cement, e.g. methylmethacrylate, in a previously operated-on femur 5.
  • the sector 2 is made of a plastics, such as polyethylene or a polyester, which is compatible with and resistant to the human organism and at least substantially. nonabrading.
  • the member 7 has a runner or skid or guide or the like 8 on the periphery which is raised and which is adapted in shape to the groove 1.
  • the member 7 is in the form of a circle segment which is cut from a cylindrical disc 9 in the manner shown in FIG. 4.
  • the segment 7 has an angular cutout less than that of the sector 2, by way of example,
  • the segment 7 projects from the disc 9 to be asymmetrical of a perpendicular 10 to the center of the base 11. Because of this, there are various possibilities for positioning and curvature of the member 8 in the patella 9 by turning the segment 7 through In one case, when the joint bends relatively to the femur 5, the patella 6 describes one particular curve, while in the other case, the patella 6 describes a different curve.
  • the prosthesis can therefore be adapted to some extent to the requirements of individual patients.
  • the member 7 has pins 12 which are introduced into the base 11 and rigidly anchored therein, e.g. by welding or brazing. These pins 12 are introduced into correspond- Trig passages in the patella 6, which has also been formed with a recess adapted to the shape of the memher 7, and fixed by a bone cement. If the pins 12 are at least approximately disposed to be at the same distance a from the outermost edge of the segment 7 as measured in a direction parallel to the base 11, the rotation of the segment 7 just described can readily be performed during the fitting operation if necessary or in a subsequent correcting operation, without having to contrive new passages in the patella 6 to receive the pins 12.
  • the runner 8 has a button-like projection 13 approximately at the center of its arc.
  • This projection 13 is, conveniently, embodied as a pin having a part-spherical head. Such a pin can be produced independently of the member 7 and can be subsequently pressed into an appropriate passage in the member 7.
  • the member 7 and the projection 13 can be made of one of the known metal alloys suitable for prosthetic implants, thus ensuring, if the groove 1 is of plastics or is plastics-coated, the satisfactory sliding properties of metal on a plastic surface.
  • a prosthetic implant for guiding a patella on a 'femur comprising an annular sector for implanting in a femur, said sector having a guide groove in an arcuate peripheral surface thereof;
  • a member for implanting in a patella said member having a runner mounted in raised relation on a pcripheral surface thereof, said runner being shaped in complementary relation to said guide groove and being slidingly received in said guide groove.
  • each pin is spaced from an adjacent outermost boundary of said member the same distance as the other pin from the other boundary as measured in a direction parallel to said base.

Abstract

The implant includes an annular sector having a guide groove for implanting in the femur and a slidable member for implanting in the patella which member has a manner of arcuate shape for sliding in the guide groove of the annular sector. The runner also has a raised projection to provide for tilting movements of the patella. The slidable member is asymmetrical about a central plane so as to provide for two different implant positions.

Description

United States Patent 1 Miiller PHOSTHETIC PATELLA IMPLANT [75] Inventor: Maurice E. Miiller, Bern,
Switzerland [73] Assignee: Sulzer Brothers Ltd., Winterthur,
Switzerland [22] Filed: Feb. 15, 1973 [21] Appl. No.: 332,655
[52] US. Cl. 3/1, 128/92 C [51] Int. Cl. A611 1/24 [58] Field of Search 3/1; 128/92 C, 92 R [56] References Cited UNITED STATES PATENTS 3,547,115 12/1970- Stevens 3/1 X 3,696,446 10/1972 Bousquet et al. 3/1 FOREIGN PATENTS OR APPLICATIONS 1,122,634 5/1956 France 128/92 C OTHER PUBLICATIONS Patellar Prosthesis by D. C. McKeever, The Journal Apr. 30, 197 4 of Bone & Joint Surgery, Vol. 37-A, No. 5, Oct. 1955, Pages 1074-1075. 4
Primary ExaminerRichard A. Gaudet Assistant ExaminerRonald L. Frinks Attorney, Agent, or FirmKenyon & Kenyon Reilly Carr & Chapin [5 7] ABSTRACT The implant includes an annular sector having a guide groove for implanting in the femur and a slidable -member for implanting in the patella which member has a manner of arcuate shape for sliding in the guide groove of the annular sector. The runner also has a' raised projection to provide for tilting movementsof the patella. The slidable member is asymmetrical about a central plane so as to provide for two different implant positions.
6' Claims, 6 Drawing Figures PATENTEuAPRamsM SHEET 2 [IF 2 Fig.6
.Q, m J
Briefly, the invention provides a prosthetic implant for guiding a patella on a femur which includes an annular sector for implanting in the femur and a member for implanting in the patella. The annular sector has a guide groove in an arcuate peripheral surface while the other member has a runner mounted in raised relation on a peripheral surface for sliding in the guide groove. The runner which can also be in the form of a skid or guide is of complementary shape to the shape of the guide groove to facilitate sliding.
Advantageously, one of the two parts of the prosthesis is made of a plastics, e.g. polyethylene, which is compatible with the human organism, while the other part is made of one of the known metal alloys used for prosthetic implant. Both parts can, of course, be made of metal, in which event, as another variant, one of the two parts'may'be plastics coated. Alternatively, both parts can be made from appropriate plastics, e.g. polyethylene or a polyester.
Preferably, the runner can be disposed on the periphery of a circle segment of a cylindrical disc. In order to provide some range of adaptation of the prosthesis to the individual circumstances of each patient, the circle segment of the disc is asymmetrical relative to the perpendicular passing through the center of its base. The advantage of this feature is that the prosthesis can be fitted in the patella in two different positions 180 apart from one another, the runner having more curvature in one of these positions than in the other.
In order to provide a simple way of securing the sliding member in the patella, the sliding member can be pinned therein by means of two pins. In this case, and if the sliding member is embodied as a circle segment, the pins can each be at at least substantially the same distance from the outermost boundary of the segment as measured in a direction parallel to the base.
These and other objects and advantages of the invention will become more apparent from the following detailed description and appended claims taken in conjunction with the accompanying drawings in which:
FIG. 1 diagrammatically illustrates a front elevational view of an annular sector formed with a guide groove and inserted in a femur in accordance with the invention;
F IG. 2 diagrammatically illustrates a side elevational view of the sector, of FIG. 1 in a femur;
FIG. 3 illustrates a view taken on line III-III of FIG. 2, the bone which surrounds the sector having been omitted; I
FIG. 4 illustrates a side elevation of a circular disc and an arcuate segment which is cut out to form a sliding member according to the invention;
FIG. 5 illustrates a side elevational view of the finished arcuate segment; and
FIG. 6 illustrates a diagrammatic plan view of an arcuate segment after being fitted into a' patella.
Referring to FIGS. 1 and 3, a guiding groove 1, shown in approximately normal size, is disposed in an annular or arcuate sector 2 comprising a rim-like disc and representing a cut-out of approximately one-third of a complete circle (about 105). The sector 2 includes side flanks 3, 4 which are formed with projections and recesses (not shown) for improved anchorage, provided basically by a bone cement, e.g. methylmethacrylate, in a previously operated-on femur 5. The sector 2 is made of a plastics, such as polyethylene or a polyester, which is compatible with and resistant to the human organism and at least substantially. nonabrading.
Referring to FIGS. 5 and 6, a sliding member 7, which is shown in normal size, is adapted to be anchored in a patella 6. The member 7 has a runner or skid or guide or the like 8 on the periphery which is raised and which is adapted in shape to the groove 1. As shown, the member 7 is in the form of a circle segment which is cut from a cylindrical disc 9 in the manner shown in FIG. 4. The segment 7 has an angular cutout less than that of the sector 2, by way of example,
about 93 in one existing prosthesis as compared with t the 105 of the sector 2. As FIG. 4 also shows, the segment 7 projects from the disc 9 to be asymmetrical of a perpendicular 10 to the center of the base 11. Because of this, there are various possibilities for positioning and curvature of the member 8 in the patella 9 by turning the segment 7 through In one case, when the joint bends relatively to the femur 5, the patella 6 describes one particular curve, while in the other case, the patella 6 describes a different curve. The prosthesis can therefore be adapted to some extent to the requirements of individual patients.
In order to secure the member 7 in the patella 6, the member 7 has pins 12 which are introduced into the base 11 and rigidly anchored therein, e.g. by welding or brazing. These pins 12 are introduced into correspond- Trig passages in the patella 6, which has also been formed with a recess adapted to the shape of the memher 7, and fixed by a bone cement. If the pins 12 are at least approximately disposed to be at the same distance a from the outermost edge of the segment 7 as measured in a direction parallel to the base 11, the rotation of the segment 7 just described can readily be performed during the fitting operation if necessary or in a subsequent correcting operation, without having to contrive new passages in the patella 6 to receive the pins 12.
In order to allow some provision for tilting movements of the patella 6 which is guided by the member 7 in the groove 1, the runner 8 has a button-like projection 13 approximately at the center of its arc. This projection 13 is, conveniently, embodied as a pin having a part-spherical head. Such a pin can be produced independently of the member 7 and can be subsequently pressed into an appropriate passage in the member 7.
As already mentioned, the member 7 and the projection 13 can be made of one of the known metal alloys suitable for prosthetic implants, thus ensuring, if the groove 1 is of plastics or is plastics-coated, the satisfactory sliding properties of metal on a plastic surface.
What is claimed is:
l. A prosthetic implant for guiding a patella on a 'femur comprising an annular sector for implanting in a femur, said sector having a guide groove in an arcuate peripheral surface thereof; and
a member for implanting in a patella, said member having a runner mounted in raised relation on a pcripheral surface thereof, said runner being shaped in complementary relation to said guide groove and being slidingly received in said guide groove.
2. A prosthetic implant as set forth in claim 1 wherein said runner has an arcuately shaped periphery.
3. A prosthetic implant as set forth in claim 2 wherein said member has a flat base and is asymmetrical relative to a perpendicular plane to said base and passing through the center of said base.
4. A prosthetic implant as set forth in claim 1 wherein said member includes a base and a pair of pins in said base for pinning said member in the patella.
5. A prosthetic implant as set forth in claim 4 wherein each pin is spaced from an adjacent outermost boundary of said member the same distance as the other pin from the other boundary as measured in a direction parallel to said base.
6. A prosthetic implant as set forth in claim 1 wherein said member has a part-spherical projection projecting outwardly from said runner for sliding in said guide groove of said sector.
$ 0 ,9 Dated April 30, 197
" Maurice E. Muller Patent No.
Invantofls) identified patent It is certified that error appears in the aboveshown below:
and that said 'Letg tera Patent are hereby corrected as In the title page of the patent, insert the following:
s based on Swiss; Patent Applica- ---This application 1 to which tioh'No. 2233/72 filed February 16 1972,
the right; of priority is claimed.-
an d le aled this 4th day of February 1975.
MCCOY M; GIBSON JR. .Atte'sting Commissioner of Patents

Claims (6)

1. A prosthetic implant for guiding a patella on a femur comprising an annular sector for implanting in a femur, said sector having a guide groove in an arcuate peripheral surface thereof; and a member for implaNting in a patella, said member having a runner mounted in raised relation on a peripheral surface thereof, said runner being shaped in complementary relation to said guide groove and being slidingly received in said guide groove.
2. A prosthetic implant as set forth in claim 1 wherein said runner has an arcuately shaped periphery.
3. A prosthetic implant as set forth in claim 2 wherein said member has a flat base and is asymmetrical relative to a perpendicular plane to said base and passing through the center of said base.
4. A prosthetic implant as set forth in claim 1 wherein said member includes a base and a pair of pins in said base for pinning said member in the patella.
5. A prosthetic implant as set forth in claim 4 wherein each pin is spaced from an adjacent outermost boundary of said member the same distance as the other pin from the other boundary as measured in a direction parallel to said base.
6. A prosthetic implant as set forth in claim 1 wherein said member has a part-spherical projection projecting outwardly from said runner for sliding in said guide groove of said sector.
US00332655A 1972-02-16 1973-02-15 Phosthetic patella implant Expired - Lifetime US3806961A (en)

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CH223372A CH548202A (en) 1972-02-16 1972-02-16 IMPLANT PROSTHESIS FOR A KNEE DISC.
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Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3872519A (en) * 1974-04-04 1975-03-25 Nicholas J Giannestras Total ankle prosthesis
US3878566A (en) * 1974-05-08 1975-04-22 Richards Mfg Co Patello-femoral prosthesis
US3927423A (en) * 1974-06-07 1975-12-23 Alfred B Swanson Patellar implant and method
US4007495A (en) * 1976-05-28 1977-02-15 Frazier Calvin H Patello-femoral prothesis
US4094017A (en) * 1977-02-16 1978-06-13 Larry Stanford Matthews Knee joint prosthesis with patellar-femoral contact
US4151615A (en) * 1977-06-29 1979-05-01 Hall Thomas D Prosthetic patello-femoral joint
US4158894A (en) * 1978-03-13 1979-06-26 Worrell Richard V Patellar prosthesis and method of implanting the same
FR2445136A1 (en) * 1978-12-27 1980-07-25 Imbert Jean Claude Total prosthetic replacement for femoro-patellar articulation - comprises convex patellar component with parallel fixing flanges and concave rail on femur over which it slides
US4344192A (en) * 1980-07-14 1982-08-17 Imbert Jean C Full dual element prosthesis designed for the femoro-patellar joint
US4353135A (en) * 1980-05-09 1982-10-12 Minnesota Mining And Manufacturing Company Patellar flange and femoral knee-joint prosthesis
US5021061A (en) * 1990-09-26 1991-06-04 Queen's University At Kingston Prosthetic patello-femoral joint
US5226916A (en) * 1990-08-28 1993-07-13 British Technology Group Limited Prosthetic femoral components
US5330532A (en) * 1990-11-09 1994-07-19 Chitranjan Ranawat Knee joint prosthesis
FR2719762A1 (en) * 1994-05-13 1995-11-17 Smith & Nephew Richards France Trochlear implant for femoro-patellar prosthesis and its fitting instrumentation.
US5571196A (en) * 1994-10-24 1996-11-05 Stein; Daniel Patello-femoral joint replacement device and method
US5824098A (en) * 1994-10-24 1998-10-20 Stein; Daniel Patello-femoral joint replacement device and method
US20030120346A1 (en) * 2001-08-07 2003-06-26 James Mercinek Patellar prosthetic arrangement and associated surgical method
US20030181984A1 (en) * 2002-02-14 2003-09-25 Abendschein Walter F. Method and instrumentation for patello-femoral joint replacement
US20040191106A1 (en) * 2002-11-08 2004-09-30 Howmedica Osteonics Corp. Laser-produced porous surface
US20050143833A1 (en) * 2001-08-07 2005-06-30 Merchant Alan C. Patello-femoral joint arthroplasty
US20050165492A1 (en) * 2004-01-23 2005-07-28 Wolfgang Fitz Bone protector, kit and method
US20050222685A1 (en) * 2004-03-31 2005-10-06 Hayden Adam I Sliding patellar prosthesis
US20060009855A1 (en) * 2004-07-09 2006-01-12 Medicinelodge, Inc. Trochlear groove implants and related methods and instruments
US20060147332A1 (en) * 2004-12-30 2006-07-06 Howmedica Osteonics Corp. Laser-produced porous structure
US20070100459A1 (en) * 2005-10-27 2007-05-03 Rhodes James M Method of repairing a knee joint
US20070100460A1 (en) * 2005-10-27 2007-05-03 Rhodes James M Orthopaedic implant systems with anti-abrasion studs
US20070142914A1 (en) * 2005-12-06 2007-06-21 Eric Jones Laser-produced porous surface
US20070288021A1 (en) * 2006-06-07 2007-12-13 Howmedica Osteonics Corp. Flexible joint implant
US20080050412A1 (en) * 2006-08-15 2008-02-28 Howmedica Osteonics Corp. Antimicrobial implant
US7445639B2 (en) 2001-02-23 2008-11-04 Biomet Manufacturing Corp. Knee joint prosthesis
US7497874B1 (en) 2001-02-23 2009-03-03 Biomet Manufacturing Corp. Knee joint prosthesis
US20090068245A1 (en) * 2007-07-24 2009-03-12 Noble Aaron M Porous Laser Sintered Articles
US8157869B2 (en) 2007-01-10 2012-04-17 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
US8328873B2 (en) 2007-01-10 2012-12-11 Biomet Manufacturing Corp. Knee joint prosthesis system and method for implantation
US8350186B2 (en) 2005-12-30 2013-01-08 Howmedica Osteonics Corp. Laser-produced implants
US8562616B2 (en) 2007-10-10 2013-10-22 Biomet Manufacturing, Llc Knee joint prosthesis system and method for implantation
US9135374B2 (en) 2012-04-06 2015-09-15 Howmedica Osteonics Corp. Surface modified unit cell lattice structures for optimized secure freeform fabrication
US9180010B2 (en) 2012-04-06 2015-11-10 Howmedica Osteonics Corp. Surface modified unit cell lattice structures for optimized secure freeform fabrication
US9364896B2 (en) 2012-02-07 2016-06-14 Medical Modeling Inc. Fabrication of hybrid solid-porous medical implantable devices with electron beam melting technology
US10893948B2 (en) 2017-11-02 2021-01-19 Howmedica Osteonics Corp. Rotary arc patella articulating geometry
IT201900024472A1 (en) 2019-12-18 2021-06-18 Tommaso Nicetto TROCLEAR PROSTHETIC IMPLANT FOR KNEE JOINT

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FR1122634A (en) * 1955-02-25 1956-09-11 Improvements to joint prostheses
US3547115A (en) * 1968-04-05 1970-12-15 Peter S Stevens Osteoarticular prosthetic method
US3696446A (en) * 1970-01-30 1972-10-10 Ass De L Ecole Catholique D Ar Total knee prosthesis

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FR1122634A (en) * 1955-02-25 1956-09-11 Improvements to joint prostheses
US3547115A (en) * 1968-04-05 1970-12-15 Peter S Stevens Osteoarticular prosthetic method
US3696446A (en) * 1970-01-30 1972-10-10 Ass De L Ecole Catholique D Ar Total knee prosthesis

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Title
Patellar Prosthesis by D. C. McKeever, The Journal of Bone & Joint Surgery, Vol. 37 A, No. 5, Oct. 1955, Pages 1074 1075. *

Cited By (82)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3872519A (en) * 1974-04-04 1975-03-25 Nicholas J Giannestras Total ankle prosthesis
US3878566A (en) * 1974-05-08 1975-04-22 Richards Mfg Co Patello-femoral prosthesis
US3927423A (en) * 1974-06-07 1975-12-23 Alfred B Swanson Patellar implant and method
US4007495A (en) * 1976-05-28 1977-02-15 Frazier Calvin H Patello-femoral prothesis
US4094017A (en) * 1977-02-16 1978-06-13 Larry Stanford Matthews Knee joint prosthesis with patellar-femoral contact
US4151615A (en) * 1977-06-29 1979-05-01 Hall Thomas D Prosthetic patello-femoral joint
US4158894A (en) * 1978-03-13 1979-06-26 Worrell Richard V Patellar prosthesis and method of implanting the same
FR2445136A1 (en) * 1978-12-27 1980-07-25 Imbert Jean Claude Total prosthetic replacement for femoro-patellar articulation - comprises convex patellar component with parallel fixing flanges and concave rail on femur over which it slides
US4353135A (en) * 1980-05-09 1982-10-12 Minnesota Mining And Manufacturing Company Patellar flange and femoral knee-joint prosthesis
US4344192A (en) * 1980-07-14 1982-08-17 Imbert Jean C Full dual element prosthesis designed for the femoro-patellar joint
US5226916A (en) * 1990-08-28 1993-07-13 British Technology Group Limited Prosthetic femoral components
US5021061A (en) * 1990-09-26 1991-06-04 Queen's University At Kingston Prosthetic patello-femoral joint
US5330532A (en) * 1990-11-09 1994-07-19 Chitranjan Ranawat Knee joint prosthesis
FR2719762A1 (en) * 1994-05-13 1995-11-17 Smith & Nephew Richards France Trochlear implant for femoro-patellar prosthesis and its fitting instrumentation.
EP0685210A1 (en) * 1994-05-13 1995-12-06 SMITH & NEPHEW RICHARDS FRANCE Femoral condylar and patellar implantable prosthesis and implantation instrumentation
US5702459A (en) * 1994-05-13 1997-12-30 Smith & Nephew Richards France Trochlea implant for a femoro-patellar prosthesis
US5571196A (en) * 1994-10-24 1996-11-05 Stein; Daniel Patello-femoral joint replacement device and method
US5824098A (en) * 1994-10-24 1998-10-20 Stein; Daniel Patello-femoral joint replacement device and method
US7445639B2 (en) 2001-02-23 2008-11-04 Biomet Manufacturing Corp. Knee joint prosthesis
US7497874B1 (en) 2001-02-23 2009-03-03 Biomet Manufacturing Corp. Knee joint prosthesis
US20030120346A1 (en) * 2001-08-07 2003-06-26 James Mercinek Patellar prosthetic arrangement and associated surgical method
US20050143833A1 (en) * 2001-08-07 2005-06-30 Merchant Alan C. Patello-femoral joint arthroplasty
US20050143830A1 (en) * 2001-08-07 2005-06-30 James Marcinek Patellar prosthetic arrangement and associated surgical method
US8226726B2 (en) 2002-02-14 2012-07-24 Biomet Manufacturing Corp. Method and instrumentation for patello-femoral joint replacement
US20090326660A1 (en) * 2002-02-14 2009-12-31 Biomet Manufacturing Corp. Method and Instrumentation for Patello-Femoral Joint Replacement
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