Surface modification of ePTFE and implants using the same

Coating processes – Medical or dental purpose product; parts; subcombinations;...

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C427S002240, C427S002250, C427S533000, C427S535000, C427S536000, C623S001430, C623S001460

Reexamination Certificate

active

07597924

ABSTRACT:
A method for modifying an ePTFE surface by plasma immersion ion implantation includes the steps of providing an ePTFE material in a chamber suitable for plasma treatment; providing a continuous low energy plasma discharge onto the sample; and applying negative high voltage pulses of short duration to form a high energy ion flux from the plasma discharge to generate ions which form free radials on the surface of the ePTFE material without changing the molecular and/or physical structure below the surface to define a modified ePTFE surface. The step of applying the high voltage pulses modifies the surface of the ePTFE without destroying the node and fibril structure of the ePTFE, even when the step of applying the high voltage pulses etches and/or carburizes the surface of the ePTFE. The modified surface may have a depth of about 30 nm to about 500 nm. The ions are dosed onto the ePTFE sample at concentrations or doses from about 1013ions/cm2to about 1016ions/cm2.

REFERENCES:
patent: 4661383 (1987-04-01), Elsenbaumer et al.
patent: 5244654 (1993-09-01), Narayanan
patent: 5290548 (1994-03-01), Goldberg et al.
patent: 5376400 (1994-12-01), Goldberg et al.
patent: 5437900 (1995-08-01), Kuzowski
patent: 5804263 (1998-09-01), Goldberg et al.
patent: 5914182 (1999-06-01), Drumheller
patent: 6022902 (2000-02-01), Koontz
patent: 6306165 (2001-10-01), Pataik et al.
patent: 6403167 (2002-06-01), Lee et al.
patent: 6517571 (2003-02-01), Brauker et al.
patent: 6632470 (2003-10-01), Morra et al.
patent: 6780497 (2004-08-01), Walter
patent: 6803069 (2004-10-01), Patnaik et al.
patent: 2001/0044655 (2001-11-01), Patnaik et al.
patent: 2005/0003019 (2005-01-01), Petersen
patent: 2005/0102025 (2005-05-01), Laroche et al.
patent: 2005/0152813 (2005-07-01), Noh
patent: 199 04 913 (1999-09-01), None
patent: 0 930 331 (1999-07-01), None
patent: WO 02/070032 (2002-09-01), None
Huang et al.; Surface modification of biomaterials by plasma immersion ion implantation; Surface & Coating Technology 186; pp. 218-226, 2004.
Schiller et al.; Plasma immersion ion implantation of poly(tetrafluoroethylene); Surface and Coating Technology;177-178, pp. 483-488; 2004.
Tseng et al.; Effects of amide and amine plasma-treated ePTFE vascular grafts on endothelial cell lining in an artificial circulatory systems; Journal of Biomedical Materials Research; vol. 42, No. 1, pp. 188-198, Oct. 1998.
Takahashi et al.; Biocompatibility of ePTFE Modified by Ion Beam Irradiation; No Shinkei Geka vol. 32(4), pp. 339-344; 2004.
Yotoriyami et al.; Ion-Beam Irradiated ePTFE for the Therapy of Intracranial Aneurysms; No Shinkei Geka, vol. 32(5), pp. 471-478; 2004.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Surface modification of ePTFE and implants using the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Surface modification of ePTFE and implants using the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface modification of ePTFE and implants using the same will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4106869

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.