SE465571B - Saett att framstaella ett sammansatt keramiskt material med bioaktiva egenskaper - Google Patents
Saett att framstaella ett sammansatt keramiskt material med bioaktiva egenskaperInfo
- Publication number
- SE465571B SE465571B SE8901294A SE8901294A SE465571B SE 465571 B SE465571 B SE 465571B SE 8901294 A SE8901294 A SE 8901294A SE 8901294 A SE8901294 A SE 8901294A SE 465571 B SE465571 B SE 465571B
- Authority
- SE
- Sweden
- Prior art keywords
- powder
- matrix
- mpa
- calcium phosphate
- mainly
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/40—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material
- A61L27/42—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having an inorganic matrix
- A61L27/427—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having an inorganic matrix of other specific inorganic materials not covered by A61L27/422 or A61L27/425
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/111—Fine ceramics
- C04B35/117—Composites
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/111—Fine ceramics
- C04B35/117—Composites
- C04B35/119—Composites with zirconium oxide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
- C04B35/486—Fine ceramics
- C04B35/488—Composites
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
- C04B35/49—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates containing also titanium oxides or titanates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/6303—Inorganic additives
- C04B35/6306—Binders based on phosphoric acids or phosphates
- C04B35/6313—Alkali metal or alkaline earth metal phosphates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
- C04B35/645—Pressure sintering
- C04B35/6455—Hot isostatic pressing
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Composite Materials (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Dermatology (AREA)
- Transplantation (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Medicinal Chemistry (AREA)
- Materials For Medical Uses (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Dental Preparations (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8901294A SE465571B (sv) | 1989-04-10 | 1989-04-10 | Saett att framstaella ett sammansatt keramiskt material med bioaktiva egenskaper |
US07/752,605 US5306673A (en) | 1989-04-10 | 1990-03-30 | Composite ceramic material and method to manufacture the material |
PCT/SE1990/000207 WO1990011979A1 (en) | 1989-04-10 | 1990-03-30 | Composite ceramic material and method to manufacture the material |
DE69024647T DE69024647T2 (de) | 1989-04-10 | 1990-03-30 | Komposit-keramisches material und verfahren zur herstellung |
ES90906419T ES2081982T3 (es) | 1989-04-10 | 1990-03-30 | Metodo de fabricacion de un material ceramico compuesto. |
EP90906419A EP0467948B1 (en) | 1989-04-10 | 1990-03-30 | Composite ceramic material and method to manufacture the material |
AT90906419T ATE132471T1 (de) | 1989-04-10 | 1990-03-30 | Komposit-keramisches material und verfahren zur herstellung |
AU55287/90A AU5528790A (en) | 1989-04-10 | 1990-03-30 | Composite ceramic material and method to manufacture the material |
JP2506379A JPH04504403A (ja) | 1989-04-10 | 1990-03-30 | 合成セラミック材料およびその製法 |
DK90906419.8T DK0467948T3 (da) | 1989-04-10 | 1990-03-30 | Komposit keramisk meteriale og fremgangsmåde til fremstilling heraf |
HK128096A HK128096A (en) | 1989-04-10 | 1996-07-18 | Composite ceramic material and method to manufacture the material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8901294A SE465571B (sv) | 1989-04-10 | 1989-04-10 | Saett att framstaella ett sammansatt keramiskt material med bioaktiva egenskaper |
Publications (3)
Publication Number | Publication Date |
---|---|
SE8901294D0 SE8901294D0 (sv) | 1989-04-10 |
SE8901294L SE8901294L (sv) | 1990-10-11 |
SE465571B true SE465571B (sv) | 1991-09-30 |
Family
ID=20375636
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8901294A SE465571B (sv) | 1989-04-10 | 1989-04-10 | Saett att framstaella ett sammansatt keramiskt material med bioaktiva egenskaper |
Country Status (11)
Country | Link |
---|---|
US (1) | US5306673A (ja) |
EP (1) | EP0467948B1 (ja) |
JP (1) | JPH04504403A (ja) |
AT (1) | ATE132471T1 (ja) |
AU (1) | AU5528790A (ja) |
DE (1) | DE69024647T2 (ja) |
DK (1) | DK0467948T3 (ja) |
ES (1) | ES2081982T3 (ja) |
HK (1) | HK128096A (ja) |
SE (1) | SE465571B (ja) |
WO (1) | WO1990011979A1 (ja) |
Families Citing this family (46)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4119483A1 (de) * | 1991-06-13 | 1992-12-24 | Ivoclar Ag | Mischung und verwendung derselben |
US5582785A (en) * | 1993-06-21 | 1996-12-10 | Santoku Metal Industry Co., Ltd. | Method for preparing composite oxide having oxygen absorbing and desorbing capability |
US5679294A (en) * | 1994-03-02 | 1997-10-21 | Kabushiki Kaisya Advance | α-tricalcium phosphate ceramic and production method thereof |
US6977095B1 (en) | 1997-10-01 | 2005-12-20 | Wright Medical Technology Inc. | Process for producing rigid reticulated articles |
US6136029A (en) * | 1997-10-01 | 2000-10-24 | Phillips-Origen Ceramic Technology, Llc | Bone substitute materials |
SE513556C2 (sv) * | 1997-11-11 | 2000-10-02 | Nobel Biocare Ab | Implantatelement med tunt ytskickt applicerat genom het isostatisk pressning |
SE517365C2 (sv) * | 1998-03-19 | 2002-05-28 | Biomat System Ab | Keramiskt biomaterial av kiselnitrid samt metod för dess tillverkning |
SE513036C2 (sv) * | 1998-10-02 | 2000-06-26 | Doxa Certex Ab | Sätt att framställa förbättrade biofunktionella kompositmaterial baserade på apatit genom att minimera oönskade reaktioner vid materialens framställning |
EP1492475B1 (en) * | 2001-04-16 | 2011-12-21 | Wright Medical Technology, Inc. | Dense/porous structures for use as bone substitutes |
WO2002102275A2 (en) * | 2001-06-14 | 2002-12-27 | Amedica Corporation | Metal-ceramic composite articulation |
SE521938C2 (sv) * | 2001-12-27 | 2003-12-23 | Cerbio Tech Ab | Keramiskt material, förfarande för framställning av keramiskt material och benimplantat, tandfyllnadsimplantat och biocement innefattande det keramiska materialet |
SE521973C2 (sv) | 2001-12-27 | 2003-12-23 | Cerbio Tech Ab | Ytbeläggningsförfarande, biokompatibel ytbeläggning och anordning med biokompatibel ytbeläggning |
US20060135340A1 (en) * | 2002-07-30 | 2006-06-22 | Cheang Hong N P | Spherical nano-composite powder and a method of preparing the same |
FR2850282B1 (fr) * | 2003-01-27 | 2007-04-06 | Jerome Asius | Implant injectable a base de ceramique pour le comblement de rides, depressions cutanees et cicatrices, et sa preparation |
US6993406B1 (en) | 2003-04-24 | 2006-01-31 | Sandia Corporation | Method for making a bio-compatible scaffold |
DE602005022998D1 (de) | 2004-03-10 | 2010-09-30 | Scil Technology Gmbh | Überzogene implantate, ihre herstellung und verwendung davon |
US20070110823A1 (en) * | 2004-10-11 | 2007-05-17 | Kong Young M | Sintered bioactive ceramic composite implant and preparation thereof |
US7250550B2 (en) * | 2004-10-22 | 2007-07-31 | Wright Medical Technology, Inc. | Synthetic bone substitute material |
US8814567B2 (en) | 2005-05-26 | 2014-08-26 | Zimmer Dental, Inc. | Dental implant prosthetic device with improved osseointegration and esthetic features |
US8562346B2 (en) | 2005-08-30 | 2013-10-22 | Zimmer Dental, Inc. | Dental implant for a jaw with reduced bone volume and improved osseointegration features |
AU2006284874B2 (en) | 2005-08-30 | 2011-11-17 | Zimmer Dental, Inc. | Dental implant with improved osseointegration features |
US8025903B2 (en) * | 2005-09-09 | 2011-09-27 | Wright Medical Technology, Inc. | Composite bone graft substitute cement and articles produced therefrom |
WO2007030616A2 (en) | 2005-09-09 | 2007-03-15 | Wright Medical Technology, Inc. | Composite bone graft substitute cement and articles produced therefrom |
DE102006024489A1 (de) * | 2006-05-26 | 2007-11-29 | Forschungszentrum Karlsruhe Gmbh | Grünkörper, Verfahren zur Herstellung einer Keramik und deren Verwendung |
EP2059213A2 (de) * | 2006-08-25 | 2009-05-20 | CeramTec AG | Verfahren zur herstellung von farbigen keramischen sinterkörpern, insbesondere für zahnmedizinische anwendungen |
GB0702196D0 (en) * | 2007-02-06 | 2007-03-14 | 3M Innovative Properties Co | Device for producing a dental workpiece |
US20090061389A1 (en) * | 2007-08-30 | 2009-03-05 | Matthew Lomicka | Dental implant prosthetic device with improved osseointegration and shape for resisting rotation |
GB0719824D0 (en) * | 2007-10-11 | 2007-11-21 | 3M Innovative Properties Co | Dental blank and method of making a dental ceramic blank |
US8899982B2 (en) | 2008-07-02 | 2014-12-02 | Zimmer Dental, Inc. | Implant with structure for securing a porous portion |
US8562348B2 (en) | 2008-07-02 | 2013-10-22 | Zimmer Dental, Inc. | Modular implant with secured porous portion |
US9095396B2 (en) | 2008-07-02 | 2015-08-04 | Zimmer Dental, Inc. | Porous implant with non-porous threads |
US8231387B2 (en) | 2008-07-02 | 2012-07-31 | Zimmer, Inc. | Porous implant with non-porous threads |
EP2168935A1 (de) | 2008-09-29 | 2010-03-31 | Siemens Aktiengesellschaft | Materialzusammensetzung zur Herstellung eines Feuerfestwerkstoffes sowie ihre Verwendung und Feuerfestformkörper sowie Verfahren zu seiner Herstellung |
US20100114314A1 (en) | 2008-11-06 | 2010-05-06 | Matthew Lomicka | Expandable bone implant |
US20100125303A1 (en) * | 2008-11-20 | 2010-05-20 | Daley Robert J | Methods and apparatus for replacing biological joints using bone mineral substance in a suspended state |
US20100125335A1 (en) * | 2008-11-20 | 2010-05-20 | Daley Robert J | Methods and apparatus for replacing biological joints using bone cement in a suspended state |
US8609127B2 (en) | 2009-04-03 | 2013-12-17 | Warsaw Orthopedic, Inc. | Medical implant with bioactive material and method of making the medical implant |
US9707058B2 (en) | 2009-07-10 | 2017-07-18 | Zimmer Dental, Inc. | Patient-specific implants with improved osseointegration |
EP2468699B1 (en) | 2009-08-21 | 2022-01-05 | Noritake Co., Limited | Zirconia sintered body, and mixture, pre-sintered compact and pre-sintered calcined body for sintering zirconia sintered body |
US8602782B2 (en) | 2009-11-24 | 2013-12-10 | Zimmer Dental, Inc. | Porous implant device with improved core |
JP5399949B2 (ja) * | 2010-03-02 | 2014-01-29 | 株式会社ノリタケカンパニーリミテド | ジルコニア焼結体、ジルコニア組成物及びジルコニア仮焼体 |
JP5718599B2 (ja) | 2010-08-20 | 2015-05-13 | 株式会社ノリタケカンパニーリミテド | ジルコニア焼結体、並びにその焼結用組成物及び仮焼体 |
CN108689699A (zh) * | 2018-06-14 | 2018-10-23 | 长沙鹏登生物陶瓷有限公司 | 一种高柔韧性人工骨骼关节用陶瓷复合材料及制备方法 |
PL238595B1 (pl) * | 2018-11-05 | 2021-09-13 | Inst Obrobki Plastycznej | Sposób otrzymywania półwyrobów z cyrkonu |
CN111803712B (zh) * | 2020-07-14 | 2022-04-22 | 嘉兴饶稷科技有限公司 | 具有周期性孔道结构的氧化锆陶瓷种植体及制备方法 |
CN116253562A (zh) * | 2023-02-16 | 2023-06-13 | 温州医科大学附属口腔医院 | 一种树脂渗透陶瓷复合材料及其制备方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5264199A (en) * | 1975-11-21 | 1977-05-27 | Tokyo Ika Shika Daigakuchiyou | Artificial bone and dental root with sintered apatite and method of producing same |
DE2928007A1 (de) * | 1979-07-11 | 1981-01-15 | Riess Guido Dr | Knochen-implantatkoerper fuer prothesen und knochenverbindungsstuecke sowie verfahren zu seiner herstellung |
DE3301122A1 (de) * | 1983-01-14 | 1984-07-19 | Johannes-Friedrich Dr. 2000 Hamburg Osborn | Keramischer knochenersatzwerkstoff und verfahren zu seiner herstellung |
JPS62142565A (ja) * | 1985-12-16 | 1987-06-25 | 工業技術院長 | セラミツクインプラント材料 |
JPS62197066A (ja) * | 1986-02-26 | 1987-08-31 | 工業技術院長 | 生体用のブロツク造骨材 |
JPS62297254A (ja) * | 1986-06-17 | 1987-12-24 | 永井 教之 | セラミツクス焼結体とその製造方法 |
JPH0757707B2 (ja) * | 1986-09-03 | 1995-06-21 | 三菱化学株式会社 | 多孔質セラミツクス焼結体の製造方法 |
JP2608721B2 (ja) * | 1987-05-12 | 1997-05-14 | 旭光学工業株式会社 | リン酸カルシウム系材料の製造方法 |
-
1989
- 1989-04-10 SE SE8901294A patent/SE465571B/sv not_active IP Right Cessation
-
1990
- 1990-03-30 ES ES90906419T patent/ES2081982T3/es not_active Expired - Lifetime
- 1990-03-30 AT AT90906419T patent/ATE132471T1/de not_active IP Right Cessation
- 1990-03-30 EP EP90906419A patent/EP0467948B1/en not_active Expired - Lifetime
- 1990-03-30 AU AU55287/90A patent/AU5528790A/en not_active Abandoned
- 1990-03-30 JP JP2506379A patent/JPH04504403A/ja active Pending
- 1990-03-30 WO PCT/SE1990/000207 patent/WO1990011979A1/en active IP Right Grant
- 1990-03-30 DK DK90906419.8T patent/DK0467948T3/da active
- 1990-03-30 DE DE69024647T patent/DE69024647T2/de not_active Expired - Fee Related
- 1990-03-30 US US07/752,605 patent/US5306673A/en not_active Expired - Fee Related
-
1996
- 1996-07-18 HK HK128096A patent/HK128096A/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
WO1990011979A1 (en) | 1990-10-18 |
AU5528790A (en) | 1990-11-05 |
EP0467948B1 (en) | 1996-01-03 |
JPH04504403A (ja) | 1992-08-06 |
US5306673A (en) | 1994-04-26 |
ES2081982T3 (es) | 1996-03-16 |
HK128096A (en) | 1996-07-26 |
DK0467948T3 (da) | 1996-02-26 |
ATE132471T1 (de) | 1996-01-15 |
DE69024647T2 (de) | 1996-05-30 |
DE69024647D1 (de) | 1996-02-15 |
EP0467948A1 (en) | 1992-01-29 |
SE8901294L (sv) | 1990-10-11 |
SE8901294D0 (sv) | 1989-04-10 |
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