Lin Song,Daniel E. Lawrynowicz,Kim-phuong Nguyen Le,Kevor Shane Tenhuisen
申请号：
US14221995
公开号：
US20150266210A1
申请日:
2014.03.21
申请国别(地区):
US
年份:
2015
代理人:
摘要：
A method for making an ultra-high weight polyethylene (UHMWPE) medical implant starts with obtaining a preform consolidated from UHMWPE resin. Thereafter the preform is hot isostaticly pressed at a temperature between 150° C. and 190° C. at a pressure up to 30,000 psi. After the hot isostatic pressing the preform is sequentially irradiated in a solid state at a total radiation dose of 2 to 10 MRad. The irradiated UHMWPE preform is then heated to a temperature of about 110° C. to about 190° C. for between 2 to 10 hours. The irradiated and heated preform is then cooled after each irradiation and heating to at or below 50° C., and thereafter a medical implant is formed from the preform. Alternately, the process can be performed on the medical implant itself.
