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Modification of Surface Morphology of UHMWPE for Biomedical Implants

Published online by Cambridge University Press:  01 February 2011

Ahmet Oztarhan
Affiliation:
aoztarhan@smmib05.net, Ege University, bioengineering, Bornova, Izmir, 35100, Turkey
Emel Sokullu Urkac
Affiliation:
emel@ebiltem.ege.edu.tr, Ege University, Bioengineering, Bornova, Izmir, 35100, Turkey
Nusret Kaya
Affiliation:
nnusrettersunn@hotmail.com, Ege University, Bioengineering, Bornova, Izmir, 35100, Turkey
Mesut Yenigul
Affiliation:
mesut.yenigul@ege.edu.tr, Ege University, Chemical engineering, Bornova, Izmir, 35100, Turkey
Funda Tihminlioglu
Affiliation:
fundatihminlioglu@iyte.edu.tr, Izmir Institute of Technology, Chemical engineering, Izmir, 35000, Turkey
Ayhan Ezdesir
Affiliation:
aoztarhan@smmib05.net, Petkim, Izmir, 35000, Turkey
Robert Zimmerman
Affiliation:
rlzimm@cim.aamu.edu, Alabama A&M University, Huntsville, AL, 35762, United States
Satilmis Budak
Affiliation:
satilmisbudak@yahoo.com, Alabama A&M University, Huntsville, AL, 35762, United States
C Muntele
Affiliation:
claudiu@cim.aamu.edu, Alabama A&M University, Huntsville, AL, 35762, United States
Bopha Chhay
Affiliation:
bopha@cim.aamu.edu, Alabama A&M University, Huntsville, AL, 35762, United States
Daryush Ila
Affiliation:
ila@cim.aamu.edu, Alabama A&M University, Huntsville, AL, 35762, United States
Efim Oks
Affiliation:
oks@opee.hcei.tsc.ru, High Current Electronics Institute, Tomsk, 634055, Russian Federation
Alexey Nikolaev
Affiliation:
nik@opee.hcei.tsc.ru, High Current Electronics Institute, Tomsk, 634055, Russian Federation
Zekai Tek
Affiliation:
zekai.tek@bayar.edu.tr, Celal Bayar University, Manisa, 45000, Turkey
Rengin Eltem
Affiliation:
rengin.eltem@ege.edu.tr, Ege University, Bioengineering, Bornova, Izmir, 35100, Turkey
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Abstract

UHMWPE samples were implanted with metal and metal-gas hybrid ions (Ag, Ag+N, C+H, C+H+Ar, Ti+O ) by using improved MEVVA Ion implantation technique [1,2]. with an extraction voltage of 30 kV and fluence of 1017 ions/cm2 in an attempt to change their surface morphologies in order to understand the effect of ion implantation on the surface properties of UHMWPEs. Characterizations of the implanted samples with RBS , ATR - FTIR, spectra were compared with the un-implanted ones. Implanted and unimplanted samples were also thermally characterized by TGA and DSC. It was generally observed that C-H bond concentration seemed to be decreasing with ion implantation and the results indicated that the chain structure of UHMWPE were changed and crosslink density and polymer crystallinity were increased compared to unimplanted ones resulting in increased hardness. It was also observed that nano size cracks (approx.10nm) were significantly disappeared after Ag implantation, which also has an improved antibacterial effect. Contact angle measurements showed that wettability of samples increased with ion implantation. Results showed that metal and metal+gas hybrid ion implantation could be an effective way to improve the surface properties of UHMWPE to be used in hip and knee prosthesis.

Type
Research Article
Copyright
Copyright © Materials Research Society 2007

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References

List of References

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