PMID- 2279979
OWN - NLM
STAT- MEDLINE
DCOM- 19910311
LR  - 20081121
IS  - 0021-9304 (Print)
IS  - 0021-9304 (Linking)
VI  - 24
IP  - 11
DP  - 1990 Nov
TI  - Adherence of HDPE powder coating on Co-Cr surfaces: effect of substrate 
      preparation and gas sterilization.
PG  - 1427-38
AB  - As part of the development of a hemiarthroplasty implant with a compliant surface 
      layer, the effect of surface preparation of a cast Co-Cr alloy substrate on the 
      adhesion of a polymeric coating was studied. High-density polyethylene (HDPE) 
      coatings were deposited on Co-Cr alloys without adhesive by spraying powder onto 
      the surface of specimens maintained at a controlled temperature. Prior to 
      deposition, two different types of surface preparation were carried out: chemical 
      etching and grit-blasting. Adherence tests were performed in order to study the 
      effect of the surface preparation of a Co-Cr alloy on the adherence of the HDPE 
      film. The etching process enhanced the adherence by a factor of 10 compared to 
      the grit-blasting process. For coatings deposited on grit-blasted Co-Cr surfaces, 
      rupture occurred at the interface (adhesive mode) as well as in the coating 
      (cohesive mode). A full cohesive mode was observed for films deposited on etched 
      surfaces. Gas sterilization with an ethylene oxide and Freon 12 solution did not 
      change significantly the adherence of the film deposited on etched surfaces. 
      Examination of the surfaces indicated that the etching process created a specific 
      type of porosity consisting of dendritic cavities whereas grit-blasting produced 
      surface irregularities. Cavities produced by etching were larger that the polymer 
      powder particles and could be easily filled. The coating of an etched Co-Cr alloy 
      substrate with a layer of HDPE provided an interface that could probably sustain 
      the physiological loading in a normal synovial joint.
FAU - LaBerge, M
AU  - LaBerge M
AD  - Clemson University, Dept. of Bioengineering, South Carolina 29634-0905.
FAU - Drouin, G
AU  - Drouin G
FAU - Gelinas, C
AU  - Gelinas C
FAU - Champagne, B
AU  - Champagne B
FAU - Bobyn, J D
AU  - Bobyn JD
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - J Biomed Mater Res
JT  - Journal of biomedical materials research
JID - 0112726
RN  - 0 (Biocompatible Materials)
RN  - 0 (Chromium Alloys)
RN  - 0 (Polyethylenes)
RN  - 0 (Powders)
SB  - IM
MH  - *Biocompatible Materials
MH  - *Chromium Alloys
MH  - Humans
MH  - Joint Prosthesis
MH  - Materials Testing
MH  - Microscopy, Electron, Scanning
MH  - *Polyethylenes
MH  - Powders
MH  - Sterilization/methods
MH  - Surface Properties
MH  - Tissue Adhesions
EDAT- 1990/11/01 00:00
MHDA- 1990/11/01 00:01
CRDT- 1990/11/01 00:00
PHST- 1990/11/01 00:00 [pubmed]
PHST- 1990/11/01 00:01 [medline]
PHST- 1990/11/01 00:00 [entrez]
AID - 10.1002/jbm.820241103 [doi]
PST - ppublish
SO  - J Biomed Mater Res. 1990 Nov;24(11):1427-38. doi: 10.1002/jbm.820241103.