Title:
SURFACE CROSSLINKED POLYETHYLENE
Document Type and Number:
Japanese Patent JP2012005824
Kind Code:
A
Abstract:
To provide a method for producing a wear resistant polyethylene medical implant.
The method includes: a step of forming a medical implant made at least partially of ultra high molecular weight polythylene (UHMWPE) such as an orthopedic implant. The polyethylene may be irradiated with gamma ray or e-beam radiation to form free radicals and then crosslinked to eliminate the free radicals prior to exposure to oxygen. The so treated bearing surface of the crosslinked polyethylene is then coated with a photoinitiator. Thereafter the bearing material is photocrosslinked with ultra-violet (UV) radiation. The hotocrosslinking process can also be applied to non-crosslink UHMWPE.
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Inventors:
ZHANG ZONGTAO
HANSON KEENAN MICHAEL
HE SHULIN
YAU SHI-SHEN
LAWRYNOWICZ DANIEL E
WANG AIGUO
HANSON KEENAN MICHAEL
HE SHULIN
YAU SHI-SHEN
LAWRYNOWICZ DANIEL E
WANG AIGUO
Application Number:
JP2011103628A
Publication Date:
January 12, 2012
Filing Date:
May 06, 2011
Export Citation:
Assignee:
HOWMEDICA OSTEONICS CORP
International Classes:
A61L27/00; A61F2/30; A61F2/34
Domestic Patent References:
| JP2008148850A | 2008-07-03 | |||
| JP2007202965A | 2007-08-16 | |||
| JP2003310649A | 2003-11-05 | |||
| JP2007536998A | 2007-12-20 |
Foreign References:
| WO2010023447A1 | 2010-03-04 |
Attorney, Agent or Firm:
Shoichi Okuyama
Arihara Koichi
Matsushima Tetsuo
Hidefumi Kawamura
Naomi Yoshida
Ayako Nakamura
Fukagawa Eri
Satoshi Morimoto
Kyoko Tsunoda
Hirose Miki
Arihara Koichi
Matsushima Tetsuo
Hidefumi Kawamura
Naomi Yoshida
Ayako Nakamura
Fukagawa Eri
Satoshi Morimoto
Kyoko Tsunoda
Hirose Miki