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Surface modification of poly(L-lactide) (L-PLA) and polycaprolactone (PCL)bioresorbable polymers by radio-frequency thermal glow discharge plasma isreported. Improved biocompatibility of L-PLA and PCL materials was obtained byemploying hydroxyapatite target sputtering in Ar+ plasma as evidenced by thechange of L-PLA and PCL properties from highly hydrophobic to hydrophilic, withabsolute wettability obtained for both materials, and enhanced endothelialhybrid cell line EA-hy 926 attachment to modified surfaces. For the latter,surface properties that suppress adverse cellular responses (e.g. apoptosis,necrosis) were also attained. Surface roughness and surface free energy werefound to increase significantly for both polymers under prolonged plasmaexposure and, a longer chain aliphatic PCL were found to display a marginallybetter post plasma-treated biocompatibility compared to L-PLA.

Modification of poly(L-lactide) and polycaprolactone bioresorbable  polymeric materials by RF plasma discharge: a preliminary study evaluating  EA-hy 926 cell attachment