JPS6456050A - Artificial transplant piece and method for manufacture of the same - Google Patents
Artificial transplant piece and method for manufacture of the sameInfo
- Publication number
- JPS6456050A JPS6456050A JP63183763A JP18376388A JPS6456050A JP S6456050 A JPS6456050 A JP S6456050A JP 63183763 A JP63183763 A JP 63183763A JP 18376388 A JP18376388 A JP 18376388A JP S6456050 A JPS6456050 A JP S6456050A
- Authority
- JP
- Japan
- Prior art keywords
- stem
- shape
- manufacture
- same
- porous pad
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title 1
- 238000000034 method Methods 0.000 title 1
- 238000004804 winding Methods 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/002—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature
-
- 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
- A61F2/30907—Nets or sleeves applied to surface of prostheses or in cement
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/36—Femoral heads ; Femoral endoprostheses
- A61F2/3662—Femoral shafts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/3094—Designing or manufacturing processes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/36—Femoral heads ; Femoral endoprostheses
- A61F2/3662—Femoral shafts
- A61F2/367—Proximal or metaphyseal parts of shafts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/36—Femoral heads ; Femoral endoprostheses
- A61F2/3662—Femoral shafts
- A61F2/3676—Distal or diaphyseal parts of shafts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30108—Shapes
- A61F2002/3011—Cross-sections or two-dimensional shapes
- A61F2002/30112—Rounded shapes, e.g. with rounded corners
-
- 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
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30108—Shapes
- A61F2002/3011—Cross-sections or two-dimensional shapes
- A61F2002/30112—Rounded shapes, e.g. with rounded corners
- A61F2002/30131—Rounded shapes, e.g. with rounded corners horseshoe- or crescent- or C-shaped or U-shaped
-
- 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
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30108—Shapes
- A61F2002/3011—Cross-sections or two-dimensional shapes
- A61F2002/30138—Convex polygonal shapes
- A61F2002/30158—Convex polygonal shapes trapezoidal
-
- 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
-
- 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
- A61F2/3094—Designing or manufacturing processes
- A61F2002/30968—Sintering
-
- 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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
- A61F2230/0004—Rounded shapes, e.g. with rounded corners
-
- 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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
- A61F2230/0004—Rounded shapes, e.g. with rounded corners
- A61F2230/0013—Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
-
- 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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
- A61F2230/0017—Angular shapes
- A61F2230/0026—Angular shapes trapezoidal
Abstract
PURPOSE: To reinforce fixing of prosthesis by winding a porous pad round a stem part. CONSTITUTION: A femoral region structural part 10 includes a terminal 12 and a connecting end part 14. The terminal part 16 includes plural grooves 18, and the base part 24 includes a poroud pad 26 surrounding the femoral region structural part 10. The porous pad 26 is wound round the periphery of the base part 24 of the stem part 20. A neck part 28 is extended from the base part 24 to bear a ball. The porous pad 26 is previously compressed to a first shape, and subsequently, wound round the periphery of the stem part 20 to make a second shape which agrees with the shape of the stem part 20.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US8836387A | 1987-08-24 | 1987-08-24 | |
US088363 | 1987-08-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6456050A true JPS6456050A (en) | 1989-03-02 |
JPH0614943B2 JPH0614943B2 (en) | 1994-03-02 |
Family
ID=22210940
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63183763A Expired - Fee Related JPH0614943B2 (en) | 1987-08-24 | 1988-07-25 | Artificial prosthetic implant and method of constructing the same |
Country Status (7)
Country | Link |
---|---|
JP (1) | JPH0614943B2 (en) |
AU (1) | AU613922B2 (en) |
CA (1) | CA1300811C (en) |
DE (1) | DE3822154C2 (en) |
FR (1) | FR2619707A1 (en) |
GB (1) | GB2208800B (en) |
IT (1) | IT1226850B (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4813963A (en) * | 1987-08-24 | 1989-03-21 | Zimmer, Inc. | Femoral component for a hip prosthesis |
DE4004475A1 (en) * | 1990-02-14 | 1991-08-22 | Man Technologie Gmbh | Bone implants with fibre mesh on base body |
FR2662932B1 (en) * | 1990-06-07 | 1997-09-05 | Denis Godeau | FEMALE PROSTHESIS. |
DE4119773A1 (en) * | 1991-06-15 | 1992-12-17 | Man Ceramics Gmbh | BONE IMPLANT |
DE4125152A1 (en) * | 1991-07-30 | 1993-02-04 | S & G Implants Gmbh | Shaft for hip joint prosthesis - has upper part with open cell surface structure and lower part with smooth surface |
DE4211345C1 (en) * | 1992-04-04 | 1993-11-04 | S & G Implants Gmbh | Two-shell acetabulum for hip joint prosthesis - has outer shell of metal with an external, open-cell or open-pore surface structure,and inner cell of plastics |
EP0655229A1 (en) * | 1993-11-25 | 1995-05-31 | Industrias Quirurgicas De Levante, S.A. | Straight non-hardened stem for total hip prostheses |
DE19505249A1 (en) * | 1995-02-16 | 1996-08-29 | Schmitt Friedrich | Fastener for connecting coupling elements to holder arranged in transition region of human or animal body |
DE19545470A1 (en) * | 1995-12-06 | 1997-07-31 | Matthias Dr Med Honl | End prosthesis or implant surface |
US20040236430A1 (en) * | 2001-06-13 | 2004-11-25 | Rudolf Koch | Hip endoprosthesis |
JP4524776B2 (en) * | 2004-04-14 | 2010-08-18 | 晶彦 千葉 | Method for producing porous body for living body |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6096247A (en) * | 1983-07-08 | 1985-05-29 | ツイマ− リミテツド | Bone skeletal implant and its formation |
JPS61106149A (en) * | 1984-08-31 | 1986-05-24 | ブリストルーマイヤーズ スクイブ カンパニー | Bone tissue coagulation promoting material, bone implant member and production thereof |
JPS61226038A (en) * | 1985-03-30 | 1986-10-07 | マン テクノロジー ゲーエムベーハー | Production of substitute bone implant |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3906550A (en) * | 1973-12-27 | 1975-09-23 | William Rostoker | Prosthetic device having a porous fiber metal structure |
NL7907231A (en) * | 1979-09-28 | 1981-03-31 | Leuven Res & Dev Vzw | COMPOSITE MATERIAL FOR PROSTHESIS. |
US4570271A (en) * | 1981-07-27 | 1986-02-18 | Battelle Development Corporation | Porous coatings from wire mesh for bone implants |
US4479271A (en) * | 1981-10-26 | 1984-10-30 | Zimmer, Inc. | Prosthetic device adapted to promote bone/tissue ingrowth |
US4406023A (en) * | 1982-04-19 | 1983-09-27 | Harris William H | Stemmed femoral component for the human hip |
US4589883A (en) * | 1983-06-06 | 1986-05-20 | Pfizer Hospital Products Group, Inc. | Femoral hip prosthesis |
US4536894A (en) * | 1983-08-04 | 1985-08-27 | Galante Jorge O | Hip prosthesis with flared porous bony ingrowth pads |
GB8401059D0 (en) * | 1984-01-16 | 1984-02-15 | Exeter University Of | Fixation of implants in bone |
CA1264674A (en) * | 1984-10-17 | 1990-01-23 | Paul Ducheyne | Porous flexible metal fiber material for surgical implantation |
US4660755A (en) * | 1985-09-09 | 1987-04-28 | Zimmer, Inc. | Method for constructing a surgical implant |
US4718912A (en) * | 1985-11-12 | 1988-01-12 | Zimmer Inc. | Femoral component and the method of constructing the same |
US4636219A (en) * | 1985-12-05 | 1987-01-13 | Techmedica, Inc. | Prosthesis device fabrication |
CH668903A5 (en) * | 1986-02-18 | 1989-02-15 | Sulzer Ag | SHAFT FOR A HIP JOINT PROSTHESIS. |
DE3629813A1 (en) * | 1986-09-02 | 1988-03-10 | Friedrichsfeld Gmbh | TITANIUM IMPLANT WITH WIRE-SHAPED SURFACE STRUCTURES |
IT1214566B (en) * | 1986-12-02 | 1990-01-18 | Cremascoli Spa G | FEMORAL STEM HIP PROSTHESIS, FOR HUMAN HIP PROSTHETIC REPLACEMENT. |
US4813963A (en) * | 1987-08-24 | 1989-03-21 | Zimmer, Inc. | Femoral component for a hip prosthesis |
-
1988
- 1988-05-20 CA CA000567349A patent/CA1300811C/en not_active Expired - Lifetime
- 1988-06-16 GB GB8814268A patent/GB2208800B/en not_active Expired - Lifetime
- 1988-06-20 AU AU18142/88A patent/AU613922B2/en not_active Expired
- 1988-06-30 DE DE3822154A patent/DE3822154C2/en not_active Expired - Lifetime
- 1988-07-21 FR FR8809861A patent/FR2619707A1/en active Granted
- 1988-07-25 JP JP63183763A patent/JPH0614943B2/en not_active Expired - Fee Related
- 1988-08-19 IT IT8821727A patent/IT1226850B/en active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6096247A (en) * | 1983-07-08 | 1985-05-29 | ツイマ− リミテツド | Bone skeletal implant and its formation |
JPS61106149A (en) * | 1984-08-31 | 1986-05-24 | ブリストルーマイヤーズ スクイブ カンパニー | Bone tissue coagulation promoting material, bone implant member and production thereof |
JPS61226038A (en) * | 1985-03-30 | 1986-10-07 | マン テクノロジー ゲーエムベーハー | Production of substitute bone implant |
Also Published As
Publication number | Publication date |
---|---|
JPH0614943B2 (en) | 1994-03-02 |
IT1226850B (en) | 1991-02-19 |
GB2208800B (en) | 1991-11-13 |
AU1814288A (en) | 1989-03-02 |
IT8821727A0 (en) | 1988-08-19 |
FR2619707B1 (en) | 1995-04-14 |
GB8814268D0 (en) | 1988-07-20 |
DE3822154A1 (en) | 1989-03-09 |
AU613922B2 (en) | 1991-08-15 |
DE3822154C2 (en) | 2002-10-24 |
CA1300811C (en) | 1992-05-19 |
GB2208800A (en) | 1989-04-19 |
FR2619707A1 (en) | 1989-03-03 |
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