WO2002020062A2 - Beschichtetes implantat - Google Patents
Beschichtetes implantat Download PDFInfo
- Publication number
- WO2002020062A2 WO2002020062A2 PCT/EP2001/009873 EP0109873W WO0220062A2 WO 2002020062 A2 WO2002020062 A2 WO 2002020062A2 EP 0109873 W EP0109873 W EP 0109873W WO 0220062 A2 WO0220062 A2 WO 0220062A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- coated implant
- coating
- coated
- metal
- Prior art date
Links
- 239000007943 implant Substances 0.000 title claims abstract description 29
- 238000000576 coating method Methods 0.000 claims abstract description 23
- 230000002285 radioactive effect Effects 0.000 claims abstract description 22
- 239000011248 coating agent Substances 0.000 claims abstract description 20
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 6
- 229910000510 noble metal Inorganic materials 0.000 claims abstract description 5
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 25
- 229910052709 silver Inorganic materials 0.000 claims description 15
- 239000010931 gold Substances 0.000 claims description 14
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 12
- 229910052737 gold Inorganic materials 0.000 claims description 12
- 239000004332 silver Substances 0.000 claims description 12
- 229910052763 palladium Inorganic materials 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 10
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000000560 biocompatible material Substances 0.000 claims description 2
- 239000010970 precious metal Substances 0.000 claims 2
- 238000005496 tempering Methods 0.000 claims 2
- 238000000137 annealing Methods 0.000 claims 1
- 238000010828 elution Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 18
- 230000005855 radiation Effects 0.000 description 15
- 238000010521 absorption reaction Methods 0.000 description 11
- 238000005260 corrosion Methods 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 239000000758 substrate Substances 0.000 description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- 208000007536 Thrombosis Diseases 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- 230000008021 deposition Effects 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- -1 Polytetrafluoroethylene Polymers 0.000 description 3
- 239000008280 blood Substances 0.000 description 3
- 210000004369 blood Anatomy 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 239000004926 polymethyl methacrylate Substances 0.000 description 3
- 208000037803 restenosis Diseases 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- 230000002792 vascular Effects 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000004070 electrodeposition Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 230000003511 endothelial effect Effects 0.000 description 2
- 239000003527 fibrinolytic agent Substances 0.000 description 2
- 230000035876 healing Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000010944 silver (metal) Substances 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 2
- 238000007669 thermal treatment Methods 0.000 description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 description 1
- 101150003085 Pdcl gene Proteins 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical class [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 1
- 238000005234 chemical deposition Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000002526 effect on cardiovascular system Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- MXZVHYUSLJAVOE-UHFFFAOYSA-N gold(3+);tricyanide Chemical compound [Au+3].N#[C-].N#[C-].N#[C-] MXZVHYUSLJAVOE-UHFFFAOYSA-N 0.000 description 1
- 210000003709 heart valve Anatomy 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- KHYBPSFKEHXSLX-UHFFFAOYSA-N iminotitanium Chemical class [Ti]=N KHYBPSFKEHXSLX-UHFFFAOYSA-N 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- LFAGQMCIGQNPJG-UHFFFAOYSA-N silver cyanide Chemical compound [Ag+].N#[C-] LFAGQMCIGQNPJG-UHFFFAOYSA-N 0.000 description 1
- 229940098221 silver cyanide Drugs 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 230000008467 tissue growth Effects 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K51/00—Preparations containing radioactive substances for use in therapy or testing in vivo
- A61K51/12—Preparations containing radioactive substances for use in therapy or testing in vivo characterised by a special physical form, e.g. emulsion, microcapsules, liposomes, characterized by a special physical form, e.g. emulsions, dispersions, microcapsules
- A61K51/1282—Devices used in vivo and carrying the radioactive therapeutic or diagnostic agent, therapeutic or in vivo diagnostic kits, stents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1001—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy using radiation sources introduced into or applied onto the body; brachytherapy
- A61N2005/1019—Sources therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1001—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy using radiation sources introduced into or applied onto the body; brachytherapy
- A61N5/1002—Intraluminal radiation therapy
Definitions
- the invention relates to a coated implant in which the coating consists at least of a noble metal and a metal which contains at least one radioactive isotope.
- Vascular supports (stents) to prevent vein narrowing (restenosis), e.g. B. in coronary and pereferyeral vessels have been used frequently in recent years. In some patients, tissue growth re-narrowing occurred despite stent implantation. These restenoses were seen in approximately 25% of all cases.
- radioactive stent From DE 197 24 230 a radioactive stent is known in which the radioactive isotopes are fixed on the surface with the help of an organic adhesion promoter.
- a stent is known from DE 197 24 223 in which the radioactive isotope is galvanically deposited directly on the surface.
- the object of the invention is to provide a coated implant with a low washout rate.
- Radioactive isotopes rarely emit photons or particles of a single energy.
- photons gamma and X-ray quanta
- / or particles e.g. He nuclei, electrons and positrons
- a selection of these would be an advantage.
- Radiation is partially or completely absorbed as it passes through matter, depending on the thickness of the coating and the type of coating materials. By choosing suitable layer thicknesses and materials, radiation can be selectively partially or completely absorbed.
- a particular advantage of the invention is the use of X-rays. They have a shorter range than the gamma rays generated by activation, but a larger one than electrons.
- X-ray emitting isotopes are, for example, 131 Cs and 103 Pd. They emit little or no gamma radiation. From today's perspective, their half-lives are in the ideal range of 10 to 17 days.
- the implant according to the invention has the following advantages:
- Galvanic deposition is an inexpensive, quick and relatively simple process for applying layers.
- the radioactive material must be elementary or as a detachable complex. This breaks open by dissolving in the electrolyte or by applying a voltage.
- the radioactive isotope is thus present as an ion in the electrolyte.
- the gradient of an electric field now forces the charged isotope in the direction of the oppositely charged electrode. It can separate here.
- the correct choice of the substrate and the electric field ensures a firm deposit on the electrode material.
- the following processes can be supplemented with a metallic or non-metallic (eg by electrophoresis) cover coating. The invention is explained in more detail below on the basis of exemplary embodiments.
- stainless steel and nickel-titanium compounds can be used as the material for the uncoated implants (substrate).
- Stainless steel can be easily coated with various materials to improve adhesion. They can be layers of Ag, Au, Pd or Fe for the adhesive deposition of active palladium.
- Ni-Ti compounds can be coated with various materials to improve adhesion. They can be layers of Ag, Au, Pd or Fe for the adhesive deposition of active palladium.
- the active isotope is bonded extremely firmly in the matrix of the deposited inactive material.
- the choice of temperature and duration depend on the layer composition and may need to be optimized for each coating method.
- the material must be completely degreased for successful deposition.
- the substrate is subjected to ultrasonic cleaning in acetone. This is followed by electrolytic degreasing (e.g. Emphax, W. Canning GmbH).
- the pretreated substrate is coated using a silver bath containing cyanide.
- a silver bath containing cyanide This can be done e.g. B. a bath with a silver content of 0.8 - 1.5 g / 1, with 2 g / 1 silver cyanide, 70 g / 1 sodium cyanide and 10 g / 1 sodium carbonate can be used.
- the silver layer of 50-500 nm generated after about 3 minutes is coated with radioactive palladium as in Example 1.2.
- the substrate is coated with a thin layer of gold.
- z. B. a cyanide gold bath.
- 3 g / 1 potassium cyanoaurate, 1 g / 1 nickel chloride and HC1 are used.
- the bath is operated with a pH of 0.5 - 1.5 and at room temperature.
- the anode should be insoluble (e.g. platinum).
- a current density of 1 - 2 A / dm 2 is set.
- Coatings are extremely interesting for the medical use of radioactive implants. They enable the implant to be improved or adapted with regard to: Biocompatibility corrosion
- An additional inactive coating can prevent or minimize this.
- Radioactive isotopes rarely emit photons or particles of a single energy.
- photons gamma and X-ray quanta
- / or particles e.g. He nuclei, electrons and positrons
- a selection of these would be an advantage. This is possible by choosing a suitable coating. Radiation is partially or completely absorbed as it passes through matter, depending on the thickness of the coating and the type of coating materials. By choosing suitable layer thicknesses and materials, radiation can be selectively partially or completely absorbed. This can play an important role, especially in the vascular application of radioactive implants.
- coatings can consist of silver, copper or gold.
- the examples above can be used for this.
- the material of the first layer can be used as coating material (gold on gold, silver on silver, copper on copper). But you can also exchange the materials (gold on copper, silver on copper, gold on silver, silver on gold, copper on gold, copper on silver).
- Au 500 nm - 1.5 Hm necessary.
- Carbon is often used to coat heart valves. It is easy to apply by sputtering or evaporation. Due to its low atomic number, it is unsuitable for selective absorption. Carbon can protect the material from corrosion.
- Titanium is known to be biocompatible due to its oxidic surface. It protects the material from corrosion and can be used with selective smears. Titanium can be easily sputtered onto the implant surface.
- Stainless steel :
- Inactive palladium is well suited for selective absorption. Like the active palladium, it can be applied by sputtering, chemical and electrochemical deposition or vaporization. It is sufficiently biocompatible (material in dental medicine) and has a protective effect against corrosion.
- Tantalum is biocompatible and is often used in the cardiovascular area. Due to its large atomic number, it has a great ability for selective absorption. It also has a protective effect against corrosion.
- Polytetrafluoroethylene is biocompatible, corrosion-resistant and can be used with smears such as titanium for selective absorption.
- Polyethylene terephthalate is biocompatible, corrosion-resistant and can be used with smears for selective absorption.
- Polymethyl methacrylate is biocompatible and corrosion-resistant, but cannot be used for selective absorption.
- Layer thicknesses for selective absorption The low-energy X-ray (2.70 keV) and electron beams (2.39 keV and 17.0 keV) should be 90% - 99% absorbed. The remaining photons (20.07 keV, 20.22 keV, 22.70 keV) should penetrate the coating as completely as possible.
- PET: d 50 - 500 m
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Epidemiology (AREA)
- Dispersion Chemistry (AREA)
- Medicinal Chemistry (AREA)
- Pharmacology & Pharmacy (AREA)
- Heart & Thoracic Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Materials For Medical Uses (AREA)
- Prostheses (AREA)
- Radiation-Therapy Devices (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01976155A EP1315524A2 (de) | 2000-09-08 | 2001-08-28 | Beschichtetes implantat |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10044559.4 | 2000-09-08 | ||
DE2000144559 DE10044559A1 (de) | 2000-09-08 | 2000-09-08 | Beschichtetes Implantat |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002020062A2 true WO2002020062A2 (de) | 2002-03-14 |
WO2002020062A3 WO2002020062A3 (de) | 2002-10-03 |
Family
ID=7655581
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2001/009873 WO2002020062A2 (de) | 2000-09-08 | 2001-08-28 | Beschichtetes implantat |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1315524A2 (de) |
DE (1) | DE10044559A1 (de) |
WO (1) | WO2002020062A2 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003020369A3 (de) * | 2001-08-28 | 2003-12-04 | Karlsruhe Forschzent | Radioaktives implantat und verfahren zu seiner herstellung |
US8343212B2 (en) | 2007-05-15 | 2013-01-01 | Biotectix, LLC | Polymer coatings on medical devices |
US9259516B2 (en) | 2008-12-18 | 2016-02-16 | Biotronik Vi Patent Ag | Implant and method for manufacturing |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10361942A1 (de) | 2003-12-24 | 2005-07-21 | Restate Patent Ag | Radioopaker Marker für medizinische Implantate |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6174329B1 (en) * | 1996-08-22 | 2001-01-16 | Advanced Cardiovascular Systems, Inc. | Protective coating for a stent with intermediate radiopaque coating |
DE19724223C1 (de) * | 1997-04-30 | 1998-12-24 | Schering Ag | Verfahren zur Herstellung elektrochemisch beschichteter radioaktiver Stents und ihre Verwendung zur Restenoseprophylaxe |
US5919126A (en) * | 1997-07-07 | 1999-07-06 | Implant Sciences Corporation | Coronary stent with a radioactive, radiopaque coating |
US6394945B1 (en) * | 1997-12-22 | 2002-05-28 | Mds (Canada), Inc. | Radioactively coated devices |
DE19916086B4 (de) * | 1998-04-11 | 2004-11-11 | Inflow Dynamics Inc. | Implantierbare Prothese, insbesondere Gefäßprothese (Stent) |
WO2000009212A2 (en) * | 1998-08-13 | 2000-02-24 | Nycomed Amersham Plc | Apparatus and methods for radiotherapy |
WO2000029035A1 (en) * | 1998-11-13 | 2000-05-25 | Global Vascular Concepts, Inc. | X-ray emitting surgical device |
DE19906417C1 (de) * | 1999-02-16 | 2000-06-29 | Heraeus Gmbh W C | Stützstruktur |
US6059714A (en) * | 1999-03-26 | 2000-05-09 | Implant Sciences Corporation | Radioactive medical devices |
-
2000
- 2000-09-08 DE DE2000144559 patent/DE10044559A1/de not_active Ceased
-
2001
- 2001-08-28 WO PCT/EP2001/009873 patent/WO2002020062A2/de not_active Application Discontinuation
- 2001-08-28 EP EP01976155A patent/EP1315524A2/de not_active Withdrawn
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003020369A3 (de) * | 2001-08-28 | 2003-12-04 | Karlsruhe Forschzent | Radioaktives implantat und verfahren zu seiner herstellung |
US8343212B2 (en) | 2007-05-15 | 2013-01-01 | Biotectix, LLC | Polymer coatings on medical devices |
US9259516B2 (en) | 2008-12-18 | 2016-02-16 | Biotronik Vi Patent Ag | Implant and method for manufacturing |
Also Published As
Publication number | Publication date |
---|---|
DE10044559A1 (de) | 2002-04-04 |
WO2002020062A3 (de) | 2002-10-03 |
EP1315524A2 (de) | 2003-06-04 |
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