DANA NICOLETA MIHAI, DAN MIHAILESCU, SORIN ALEXANDRU IBANESCU, LILIANA SAVIN, VICTOR GRIGORESCU, ALEXANDRU PATRASCU, MARCEL IONEL POPA POLYMERIC BIOMATERIALS WITH COMPLEMENTARY ROLE IN THE ARTICULAR ENDOPROSTHESIS I. SURFACE CHARACTERISTICS The change of the organic bone cementsícomposition (COO) determines the adjustment of some important properties for the behaviour as fixing material, such as the: superficial tension, polarity, surface energy, viscosity, contraction at polymerisation, porosity. In the present paper we monitored the influence of the compositionís changes for some acrylic cements upon their handling features. The samples were obtained via the partial replacement of the methyl methacrylate (MMA) in the liquid phase of some usual formulas with another acrylic monomer. For these, it was measured the contact angles as wettablility of the fixing material. Moreover, it was estimated the values of the hardening time, important parameter for the application phases of the cements with cold hardening and fixing of the articular endoprostheses.
Keywords: Organic bone cements, acrylic copolymers, contact angle, hardening time