BRPI0814563B8 - método para modificação de um componente biocompatível e componente biocompatível - Google Patents

método para modificação de um componente biocompatível e componente biocompatível

Info

Publication number
BRPI0814563B8
BRPI0814563B8 BRPI0814563A BRPI0814563A BRPI0814563B8 BR PI0814563 B8 BRPI0814563 B8 BR PI0814563B8 BR PI0814563 A BRPI0814563 A BR PI0814563A BR PI0814563 A BRPI0814563 A BR PI0814563A BR PI0814563 B8 BRPI0814563 B8 BR PI0814563B8
Authority
BR
Brazil
Prior art keywords
biocompatible component
modifying
microstructure
biocompatible
component
Prior art date
Application number
BRPI0814563A
Other languages
English (en)
Inventor
Fredriksson Anette
Petersson Ingela
Original Assignee
Astra Tech Ab
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
Application filed by Astra Tech Ab filed Critical Astra Tech Ab
Publication of BRPI0814563A2 publication Critical patent/BRPI0814563A2/pt
Publication of BRPI0814563B1 publication Critical patent/BRPI0814563B1/pt
Publication of BRPI0814563B8 publication Critical patent/BRPI0814563B8/pt

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 or bone-contacting surface, e.g. coating for improving bone ingrowth
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0012Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the material or composition, e.g. ceramics, surface layer, metal alloy
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS 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
    • A61L27/00Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/28Materials for coating prostheses
    • A61L27/30Inorganic materials
    • A61L27/306Other specific inorganic materials not covered by A61L27/303 - A61L27/32
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B82NANOTECHNOLOGY
    • B82YSPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00Nanotechnology for materials or surface science, e.g. nanocomposites
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B82NANOTECHNOLOGY
    • B82YSPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y5/00Nanobiotechnology or nanomedicine, e.g. protein engineering or drug delivery
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/46Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing oxalates
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C26/00Coating not provided for in groups C23C2/00 - C23C24/00
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/10Oxidising
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23GCLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/10Other heavy metals
    • C23G1/106Other heavy metals refractory metals
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0018Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the shape
    • A61C8/0037Details of the shape
    • A61C2008/0046Textured surface, e.g. roughness, microstructure
    • 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
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30667Features concerning an interaction with the environment or a particular use of the prosthesis
    • A61F2002/30719Means for cleaning prostheses
    • 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 or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2002/30906Special external or bone-contacting surface, e.g. coating for improving bone ingrowth shot- sand- or grit-blasted
    • 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 or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2002/30925Special external or bone-contacting surface, e.g. coating for improving bone ingrowth etched
    • 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 or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2002/30929Special external or bone-contacting surface, e.g. coating for improving bone ingrowth having at least two superposed coatings
    • 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
    • A61F2250/0058Additional features; Implant or prostheses properties not otherwise provided for
    • A61F2250/0092Means for cleaning prostheses
    • 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
    • A61F2310/00005The prosthesis being constructed from a particular material
    • A61F2310/00011Metals or alloys
    • A61F2310/00023Titanium or titanium-based alloys, e.g. Ti-Ni alloys
    • 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
    • A61F2310/00592Coating or prosthesis-covering structure made of ceramics or of ceramic-like compounds
    • A61F2310/00598Coating or prosthesis-covering structure made of compounds based on metal oxides or hydroxides
    • 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
    • A61F2310/00592Coating or prosthesis-covering structure made of ceramics or of ceramic-like compounds
    • A61F2310/00598Coating or prosthesis-covering structure made of compounds based on metal oxides or hydroxides
    • A61F2310/00616Coating made of titanium oxide or hydroxides
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS 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
    • A61L2400/00Materials characterised by their function or physical properties
    • A61L2400/12Nanosized materials, e.g. nanofibres, nanoparticles, nanowires, nanotubes; Nanostructured surfaces

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Nanotechnology (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Epidemiology (AREA)
  • Medicinal Chemistry (AREA)
  • Transplantation (AREA)
  • General Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Dentistry (AREA)
  • Inorganic Chemistry (AREA)
  • Medical Informatics (AREA)
  • Biotechnology (AREA)
  • Molecular Biology (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Biophysics (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Cardiology (AREA)
  • Ceramic Engineering (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • General Engineering & Computer Science (AREA)
  • Dermatology (AREA)
  • Physics & Mathematics (AREA)
  • Composite Materials (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)

Abstract

nanossuperfície. a invenção refere-se a um método para modificação de um componente biocompatível compreendendo as etapas de a) fornecimento de um componente biocompatível pelo menos parcialmente coberto por óxido metálico; e b) tratamento de pelo menos uma parte do referido componente, cuja parte é coberta pelo referido óxido metálico, com uma composição aquosa compreendendo ácido oxálico; por meio do que um óxido metálico modificado é obtido. a invenção também refere-se a um componente biocompatível compreendendo um substrato possuindo uma superfície compreendendo a) uma microestrutura compreendendo depressões separadas por patamares e/ou cristas; e b) uma nanoestrutura primária sendo sobreposta na referida microestrutura, a referida nanoestrutura primária compreendendo depressões arranjadas em uma formação do tipo onda.
BRPI0814563A 2007-07-09 2008-07-08 método para modificação de um componente biocompatível e componente biocompatível BRPI0814563B8 (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07112076A EP2022447A1 (en) 2007-07-09 2007-07-09 Nanosurface
PCT/EP2008/058860 WO2009007373A1 (en) 2007-07-09 2008-07-08 Nanosurface

Publications (3)

Publication Number Publication Date
BRPI0814563A2 BRPI0814563A2 (pt) 2015-01-06
BRPI0814563B1 BRPI0814563B1 (pt) 2018-12-26
BRPI0814563B8 true BRPI0814563B8 (pt) 2021-06-22

Family

ID=38740247

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0814563A BRPI0814563B8 (pt) 2007-07-09 2008-07-08 método para modificação de um componente biocompatível e componente biocompatível

Country Status (12)

Country Link
US (2) US8632836B2 (pt)
EP (4) EP2022447A1 (pt)
JP (1) JP5658561B2 (pt)
KR (1) KR20100055403A (pt)
CN (2) CN101686862B (pt)
AT (1) ATE494861T1 (pt)
AU (1) AU2008274303A1 (pt)
BR (1) BRPI0814563B8 (pt)
CA (1) CA2693478A1 (pt)
DE (1) DE602008004546D1 (pt)
ES (3) ES2397633T3 (pt)
WO (1) WO2009007373A1 (pt)

Families Citing this family (55)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9168147B2 (en) 2005-05-06 2015-10-27 Titan Spine, Llc Self-deploying locking screw retention device
US8585766B2 (en) 2005-05-06 2013-11-19 Titan Spine, Llc Endplate-preserving spinal implant with an integration plate having durable connectors
US8562684B2 (en) 2005-05-06 2013-10-22 Titan Spine, Llc Endplate-preserving spinal implant with an integration plate having a roughened surface topography
US8403991B2 (en) 2005-05-06 2013-03-26 Titan Spine Llc Implant with critical ratio of load bearing surface area to central opening area
US8562685B2 (en) 2005-05-06 2013-10-22 Titan Spine, Llc Spinal implant and integration plate for optimizing vertebral endplate contact load-bearing edges
US11096796B2 (en) 2005-05-06 2021-08-24 Titan Spine, Llc Interbody spinal implant having a roughened surface topography on one or more internal surfaces
US8480749B2 (en) 2005-05-06 2013-07-09 Titan Spine, Llc Friction fit and vertebral endplate-preserving spinal implant
US8551176B2 (en) 2005-05-06 2013-10-08 Titan Spine, Llc Spinal implant having a passage for enhancing contact between bone graft material and cortical endplate bone
US9125756B2 (en) 2005-05-06 2015-09-08 Titan Spine, Llc Processes for producing regular repeating patterns on surfaces of interbody devices
US20120312779A1 (en) 2005-05-06 2012-12-13 Titian Spine, LLC Methods for manufacturing implants having integration surfaces
US8758443B2 (en) 2005-05-06 2014-06-24 Titan Spine, Llc Implants with integration surfaces having regular repeating surface patterns
US8992622B2 (en) 2005-05-06 2015-03-31 Titan Spine, Llc Interbody spinal implant having a roughened surface topography
US8617248B2 (en) 2005-05-06 2013-12-31 Titan Spine, Llc Spinal implant having variable ratios of the integration surface area to the axial passage area
US8545568B2 (en) 2005-05-06 2013-10-01 Titan Spine, Llc Method of using instruments and interbody spinal implants to enhance distraction
US8585767B2 (en) 2005-05-06 2013-11-19 Titan Spine, Llc Endplate-preserving spinal implant with an integration plate having durable connectors
US8591590B2 (en) 2005-05-06 2013-11-26 Titan Spine, Llc Spinal implant having a transverse aperture
US8758442B2 (en) 2005-05-06 2014-06-24 Titan Spine, Llc Composite implants having integration surfaces composed of a regular repeating pattern
US8585765B2 (en) 2005-05-06 2013-11-19 Titan Spine, Llc Endplate-preserving spinal implant having a raised expulsion-resistant edge
US8262737B2 (en) 2005-05-06 2012-09-11 Titan Spine, Llc Composite interbody spinal implant having openings of predetermined size and shape
US8814939B2 (en) 2005-05-06 2014-08-26 Titan Spine, Llc Implants having three distinct surfaces
US8435302B2 (en) 2005-05-06 2013-05-07 Titan Spine, Llc Instruments and interbody spinal implants enhancing disc space distraction
EP2022447A1 (en) * 2007-07-09 2009-02-11 Astra Tech AB Nanosurface
US8696759B2 (en) * 2009-04-15 2014-04-15 DePuy Synthes Products, LLC Methods and devices for implants with calcium phosphate
EP2556528B1 (en) * 2010-04-09 2018-11-07 Brown University Nanostructured surfaces
EP2394602B1 (en) 2010-06-10 2016-05-18 Dentsply IH AB A dental fixture
JP2012143416A (ja) * 2011-01-13 2012-08-02 Gc Corp 歯科用インプラント及び歯科用インプラントの表面処理方法
KR20130032507A (ko) * 2011-09-23 2013-04-02 포항공과대학교 산학협력단 유기 금속을 포함하는 자기조립성 고분자를 포함하는 전극 및 그 제조 방법
US8992619B2 (en) 2011-11-01 2015-03-31 Titan Spine, Llc Microstructured implant surfaces
TWI469762B (zh) * 2011-11-25 2015-01-21 Ind Tech Res Inst 具有微奈米結構之電燒刀及其製造方法
WO2013109078A1 (ko) * 2012-01-20 2013-07-25 오스템임플란트 주식회사 거시-미세-나노규모의 삼중 구조를 지니는 임플란트의 골 유착 능력을 향상시키기 위한 다공성 표면과 그 제조 방법
WO2013142480A1 (en) 2012-03-20 2013-09-26 Titan Spine, Llc Friction-fit spinal endplate and endplate-preserving method
EP2716261A1 (en) 2012-10-02 2014-04-09 Titan Spine, LLC Implants with self-deploying anchors
US9498349B2 (en) 2012-10-09 2016-11-22 Titan Spine, Llc Expandable spinal implant with expansion wedge and anchor
US20160120625A1 (en) * 2013-06-07 2016-05-05 Straumann Holding Ag Abutment
US9615935B2 (en) 2014-01-30 2017-04-11 Titan Spine, Llc Thermally activated shape memory spring assemblies for implant expansion
WO2015125625A1 (ja) * 2014-02-21 2015-08-27 国立大学法人東北大学 歯科用部材
US10687956B2 (en) 2014-06-17 2020-06-23 Titan Spine, Inc. Corpectomy implants with roughened bioactive lateral surfaces
WO2015200266A1 (en) * 2014-06-23 2015-12-30 Community Blood Center Cellular-scale surface modification for increased osteogenic protein expression
CN105441960A (zh) * 2014-08-22 2016-03-30 广州中国科学院先进技术研究所 钛牙种植体表面超亲水性微/纳分级结构的构建方法
EP3034033A1 (en) 2014-12-16 2016-06-22 Nobel Biocare Services AG Dental implant
TWI726940B (zh) 2015-11-20 2021-05-11 美商泰坦脊柱股份有限公司 積層製造整形外科植入物之方法
US11376660B2 (en) 2015-11-20 2022-07-05 Titan Spine, Inc. Processes for additively manufacturing orthopedic implants
CN105537589B (zh) * 2016-01-28 2018-12-25 佛山市安齿生物科技有限公司 一种slm成型钛种植体表面处理方法
EP3493769B1 (en) 2016-08-03 2022-03-30 Titan Spine, Inc. Titanium implant surfaces free from alpha case and with enhanced osteoinduction
EP3539502B1 (en) * 2016-11-10 2021-10-13 Nantoh. Co., Ltd Biological tissue adhesion surface, implant, method of forming biological tissue adhesion surface, and method of manufacturing implant
CN108096640A (zh) * 2016-11-24 2018-06-01 重庆润泽医药有限公司 一种多孔材料
JP6893838B2 (ja) * 2017-07-12 2021-06-23 日本ピストンリング株式会社 インプラントの表面構造およびインプラントの表面構造の製造方法
US11419705B2 (en) 2017-09-27 2022-08-23 Straumann Holding Ag Process for the preparation of nanostructures on a dental implant
GB201802109D0 (en) * 2018-02-09 2018-03-28 Depuy Ireland Ultd Co Medical implants comprising anti-infective surfaces
US20200306015A1 (en) * 2018-06-07 2020-10-01 Taiwan Shan Yin International Co., Ltd. Implant device
JP7423202B2 (ja) * 2018-07-30 2024-01-29 キヤノン株式会社 樹脂製品、樹脂製品の製造方法、交換レンズ、および光学機器
US11485052B2 (en) * 2018-07-30 2022-11-01 Canon Kabushiki Kaisha Resin product, method of making resin product, interchangeable lens, and optical device
WO2021153658A1 (ja) * 2020-01-31 2021-08-05 京セラ株式会社 生体インプラントおよび生体インプラントの製造方法
KR102399423B1 (ko) * 2021-03-16 2022-05-19 주식회사 도이프 교정용 미니스크류의 제조 및 그 표면처리 방법
EP4169485B1 (fr) * 2021-10-21 2024-07-03 Anthogyr Implant à ancrage osseux et procédé de fabrication d'un tel implant

Family Cites Families (75)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4015A (en) * 1845-04-26 Hand-loom for weaving figured fabrics
CA962806A (en) * 1970-06-04 1975-02-18 Ontario Research Foundation Surgical prosthetic device
US3707006A (en) * 1970-08-26 1972-12-26 Gulf Oil Corp Orthopedic device for repair or replacement of bone
US3906550A (en) * 1973-12-27 1975-09-23 William Rostoker Prosthetic device having a porous fiber metal structure
US4374669A (en) * 1975-05-09 1983-02-22 Mac Gregor David C Cardiovascular prosthetic devices and implants with porous systems
US4101984A (en) * 1975-05-09 1978-07-25 Macgregor David C Cardiovascular prosthetic devices and implants with porous systems
SE416175B (sv) * 1979-03-07 1980-12-08 Per Ingvar Branemark For implantering i kroppsvevnad serskilt benvevnad, avsett material
GB2189815B (en) * 1986-03-24 1990-10-10 Permelec Electrode Ltd Titanium composite materials coated with calcium phosphate compound and process for production thereof
ES2044211T3 (es) * 1989-03-23 1994-01-01 Straumann Inst Ag Implante metalico.
JPH0428374A (ja) 1990-05-23 1992-01-30 Tdk Corp 複合インプラント
EP0401793B1 (en) 1989-06-06 1995-10-04 TDK Corporation Use of ceramic materials for living hard tissue replacements
JP2930619B2 (ja) 1989-10-30 1999-08-03 春幸 川原 チタンもしくはチタン基合金製生体修復部材及びその表面処理法
DE4028374A1 (de) 1990-09-07 1992-03-12 Abb Patent Gmbh Verfahren zum verbinden von bauteilen
TW197475B (pt) 1990-12-26 1993-01-01 Eltech Systems Corp
US5282861A (en) * 1992-03-11 1994-02-01 Ultramet Open cell tantalum structures for cancellous bone implants and cell and tissue receptors
US5356516A (en) 1993-02-26 1994-10-18 Sandia Corporation Process for etching mixed metal oxides
US5824651A (en) 1993-05-10 1998-10-20 Universite De Montreal Process for modification of implant surface with bioactive conjugates for improved integration
US5368881A (en) * 1993-06-10 1994-11-29 Depuy, Inc. Prosthesis with highly convoluted surface
WO1995012369A1 (en) 1993-11-02 1995-05-11 Hospital For Joint Diseases Control of cell growth
US7048870B1 (en) * 1993-12-20 2006-05-23 Astrazeneca Ab Metallic implant and process for treating a metallic implant
US6652765B1 (en) 1994-11-30 2003-11-25 Implant Innovations, Inc. Implant surface preparation
US5863201A (en) 1994-11-30 1999-01-26 Implant Innovations, Inc. Infection-blocking dental implant
US6491723B1 (en) 1996-02-27 2002-12-10 Implant Innovations, Inc. Implant surface preparation method
BR9509934A (pt) * 1994-11-30 1998-01-27 Implant Innovations Inc Preparação de superficie de implante
DE19506188C2 (de) 1995-02-22 2003-03-06 Miladin Lazarov Implantat und dessen Verwendung
WO1997021393A1 (en) 1995-12-08 1997-06-19 Calcitek, Inc. Dental implant having multiple tectured surfaces
EP0806211B1 (en) 1996-05-10 2002-10-23 IsoTis N.V. Implant material and process for producing it
US6069295A (en) 1996-05-10 2000-05-30 Isotis B.V. Implant material
EP0806212B1 (en) 1996-05-10 2003-04-02 IsoTis N.V. Device for incorporation and release of biologically active agents
PL183754B1 (pl) 1996-11-19 2002-07-31 Kamljuk Alexandr Konstantinovi Wciągarka z napędem ze skrzynki rozdzielczej pojazdu
EP0887179B1 (en) 1996-12-09 2005-12-21 Nippon Sheet Glass Co., Ltd. Non-fogging article and process for the production thereof
US20050031663A1 (en) 1997-05-16 2005-02-10 Cecilia Larsson Implant element
JP3404286B2 (ja) 1998-04-16 2003-05-06 日本パーカライジング株式会社 金属の表面処理方法、および該表面処理方法により得られた表面を有する金属部材
US6261322B1 (en) 1998-05-14 2001-07-17 Hayes Medical, Inc. Implant with composite coating
SE514202C2 (sv) * 1999-05-31 2001-01-22 Nobel Biocare Ab På implantat till ben- eller vävnadsstruktur anordnat skikt samt sådant implantat och förfarande för applicering av skiktet
TW491714B (en) * 1999-12-08 2002-06-21 Wen-Jing Shiue Orthopedic implant having a porous surface and method of making same
US7048541B2 (en) 2000-04-04 2006-05-23 Nobel Biocare Ab Implant having attachment and hole-insert parts, and method for producing such an implant
IT1317969B1 (it) * 2000-06-09 2003-07-21 Nora Elettrodi De Elettrodo caratterizzato da elevata adesione di uno strato cataliticosuperficiale.
CH694935A5 (de) * 2000-07-26 2005-09-30 Straumann Holding Ag Oberflaechenmodifizierte Implantate.
KR100811765B1 (ko) 2000-09-19 2008-03-07 알데코아 에두아르도 아니투아 티타늄 또는 다른 재료로 된 임플란트 또는 인공 보철의표면처리방법
CN1237945C (zh) * 2000-10-09 2006-01-25 刘宝林 改良的牙种植体表面的喷砂处理方法
US6921544B2 (en) * 2001-03-06 2005-07-26 Rutgers, The State University Magnesium-substituted hydroxyapatites
ATE278427T1 (de) 2001-04-02 2004-10-15 Stratec Medical Ag Bioaktive oberflächenschicht, insbesondere für medizinische implantate und prothesen
US6527938B2 (en) * 2001-06-21 2003-03-04 Syntheon, Llc Method for microporous surface modification of implantable metallic medical articles
WO2003070288A2 (en) * 2001-10-12 2003-08-28 Inframat Corporation Coated implants and methods of coating implants
WO2003044383A1 (de) 2001-11-23 2003-05-30 Alcove Surfaces Gmbh Lager und verbundaufbau
SE523288C2 (sv) * 2002-07-19 2004-04-06 Astra Tech Ab Ett implantat och ett förfarande för behandling av en implantatyta
DE60300277T2 (de) * 2002-11-08 2006-01-12 Howmedica Osteonics Corp. Lasererzeugte poröse Oberfläche
DE50305740D1 (de) * 2003-01-23 2007-01-04 Dinkelacker Wolfgang Knochenimplantat und Verfahren zu seiner Herstellung
AU2004200704B2 (en) * 2003-02-24 2010-03-25 Depuy Products, Inc. Metallic implants having roughened surfaces and method for producing the same
US20040167632A1 (en) 2003-02-24 2004-08-26 Depuy Products, Inc. Metallic implants having roughened surfaces and methods for producing the same
EP1622629B1 (en) * 2003-05-07 2013-07-10 Osteologix A/S Controlled-release composition containing a strontium salt
US8251700B2 (en) * 2003-05-16 2012-08-28 Biomet 3I, Llc Surface treatment process for implants made of titanium alloy
US20050119758A1 (en) 2003-07-30 2005-06-02 Bio-Lok International Inc. Surgical implant for promotion of osseo-integration
DE602004029377D1 (de) * 2004-03-04 2010-11-11 Young-Taek Sul Osseoinduktives magnesium-titan-implantat und herstellungsverfahren dafür
KR100714244B1 (ko) * 2004-04-26 2007-05-02 한국기계연구원 생체용 골유도성 금속 임플란트 및 그 제조방법
US8329202B2 (en) * 2004-11-12 2012-12-11 Depuy Products, Inc. System and method for attaching soft tissue to an implant
WO2006091582A2 (en) 2005-02-24 2006-08-31 Implant Innovations, Inc. Surface treatment methods for implants made of titanium or titanium alloy
US7601149B2 (en) 2005-03-07 2009-10-13 Boston Scientific Scimed, Inc. Apparatus for switching nominal and attenuated power between ablation probes
US20110033661A1 (en) 2005-03-21 2011-02-10 The Regents Of The University Of California Controllable nanostructuring on micro-structured surfaces
US7368065B2 (en) * 2005-06-23 2008-05-06 Depuy Products, Inc. Implants with textured surface and methods for producing the same
JP2007001826A (ja) 2005-06-24 2007-01-11 Hitachi Ltd 金属酸化物材料とその製造方法及びその利用
EP1764116A1 (en) * 2005-09-16 2007-03-21 Debiotech S.A. Porous coating process using colloidal particles
US20090207790A1 (en) 2005-10-27 2009-08-20 Qualcomm Incorporated Method and apparatus for settingtuneawaystatus in an open state in wireless communication system
KR101369388B1 (ko) 2005-11-14 2014-03-06 바이오메트 쓰리아이 엘엘씨 임플란트 표면상에 이산 나노입자의 증착방법
US7749555B2 (en) * 2006-01-25 2010-07-06 Medtronic, Inc Modification of chemical forces of bone constructs
US9327056B2 (en) * 2006-02-14 2016-05-03 Washington State University Bone replacement materials
US20070264303A1 (en) * 2006-05-12 2007-11-15 Liliana Atanasoska Coating for medical devices comprising an inorganic or ceramic oxide and a therapeutic agent
CA2671348A1 (en) * 2006-12-22 2008-07-03 Thommen Medical Ag Dental implant and method for the production thereof
EP2022447A1 (en) * 2007-07-09 2009-02-11 Astra Tech AB Nanosurface
US20090035723A1 (en) * 2007-08-03 2009-02-05 Claus Daniel Material with a repetitive pattern of micro-features for application in a living organism and method of fabrication
ES2315194B1 (es) * 2007-09-10 2010-02-26 Francisco J. GARCIA SABAN Procedimiento para obtener una nueva superficie de un implante metalico a base de titanio destinado a ser insertado en tejido oseo.
CA2704652A1 (en) * 2007-11-06 2009-05-14 Mei Wei Ceramic/structural protein composites and method of preparation thereof
CN105688276A (zh) * 2008-02-29 2016-06-22 史密夫和内修有限公司 用于生物医学应用的梯度涂层
JP5148696B2 (ja) * 2008-04-28 2013-02-20 クラレノリタケデンタル株式会社 歯科用組成物及びコンポジットレジン

Also Published As

Publication number Publication date
KR20100055403A (ko) 2010-05-26
DE602008004546D1 (en) 2011-02-24
EP2178466B1 (en) 2011-01-12
US8632836B2 (en) 2014-01-21
US20100173264A1 (en) 2010-07-08
EP2537485A1 (en) 2012-12-26
EP2319461B1 (en) 2012-09-19
WO2009007373A1 (en) 2009-01-15
EP2022447A1 (en) 2009-02-11
JP2011509098A (ja) 2011-03-24
ATE494861T1 (de) 2011-01-15
EP2178466A1 (en) 2010-04-28
CN102961193A (zh) 2013-03-13
AU2008274303A1 (en) 2009-01-15
BRPI0814563A2 (pt) 2015-01-06
CN101686862B (zh) 2014-08-06
EP2319461A1 (en) 2011-05-11
CN101686862A (zh) 2010-03-31
US9642708B2 (en) 2017-05-09
BRPI0814563B1 (pt) 2018-12-26
CN102961193B (zh) 2016-05-18
ES2358776T3 (es) 2011-05-13
US20130013081A1 (en) 2013-01-10
JP5658561B2 (ja) 2015-01-28
ES2397633T3 (es) 2013-03-08
CA2693478A1 (en) 2009-01-15
EP2537485B1 (en) 2015-05-13
ES2542243T3 (es) 2015-08-03

Similar Documents

Publication Publication Date Title
BRPI0814563B8 (pt) método para modificação de um componente biocompatível e componente biocompatível
BRPI0815703A2 (pt) Processo de fabricação de uma prótese dentária e de um guia cirúrgico dentário.
DE112007003309A5 (de) Knochenimplantat sowie Set zur Herstellung von Knochenimplantaten
BRPI0510301A (pt) implantes de metal de indução de osso para um corpo vivo e processo de produção dos mesmos
WO2008036502A3 (en) Artificial spinal disc
WO2010030714A3 (en) Platelet-derived growth factor compositions and methods for the treatment of tendon and ligament injuries
WO2008130989A3 (en) Prosthetic implants
WO2009142429A3 (ko) 치과용 임플란트 픽스쳐
BRPI0705754B8 (pt) método para texturizar um implante mamário tendo uma superfície externa e implante mamário
WO2007062079A3 (en) Devices and methods for treating facet joints, uncovertebral joints, costovertebral joints and other joints
WO2012178031A8 (en) Prosthetic implant and method of implantation
BRPI0817018A2 (pt) Ferramenta para inserção cirúrgica, combinação de ferramenta com uma extensão de um implante, e, método para implantar um implante em um paciente
WO2007100459A3 (en) Surgical slings
DK3308769T3 (da) Fremgangsmåder til fremstilling af cykliske lipidimplantater til intraokulær anvendelse
BRPI0418513B8 (pt) prótese de ombro para implantação em um paciente
EA201390099A1 (ru) Конический суставный имплант и относящиеся к нему инструменты
WO2011039502A3 (en) Surgical implant
TR200906465T1 (tr) Omurlararası implantlar için kemik sabitleme yüzeyleri
BR112013004962A2 (pt) prótese, estrutura de suporte da válvula protética, e, método de colocação de uma prótese a um local desejado no corpo
ATE538816T1 (de) Verfahren zur herstellung eines bioaktiven implantats
BRPI0808018A2 (pt) Implante intervertebral com um componente elástico
BRPI0913988A2 (pt) conjunto e processo para prover um stent de implante
WO2006096793A3 (en) Medical implants
ATE372401T1 (de) Metallimplantate
WO2007092622A3 (en) Compositions and methods for treating bone

Legal Events

Date Code Title Description
B07D Technical examination (opinion) related to article 229 of industrial property law [chapter 7.4 patent gazette]
B07G Grant request does not fulfill article 229-c lpi (prior consent of anvisa) [chapter 7.7 patent gazette]
B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B15K Others concerning applications: alteration of classification

Ipc: A61L 27/04 (2006.01), A61L 27/06 (2006.01), A61L 2

B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]

Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 26/12/2018, OBSERVADAS AS CONDICOES LEGAIS.

B16C Correction of notification of the grant [chapter 16.3 patent gazette]

Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 08/07/2008, OBSERVADAS AS CONDICOES LEGAIS. PATENTE CONCEDIDA CONFORME ADI 5.529/DF, QUE DETERMINA A ALTERACAO DO PRAZO DE CONCESSAO