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Polyurethanes used in the endoprosthesis of joints

Domańska A., Boczkowska A., Izydorzak M., Jaegermann Z., Kurzydłowski K. J.

Polish Journal of Chemical Technology

2010

Vol. 12, nr 3

10-14

The aim of the studies presented in this paper was the selection of the polyurethanes synthesized from different substrates in order to obtain i) ceramic - biodegradable polymer composite and ii) polyurethane resistant to abrasive wear. The polyurethanes were obtained from the crystalline prepolymers extended by water, because it may have a beneficial effect on the toxicity of the material. The properties of PUs were investigated using infrared spectroscopy, thermogravimetry, differential scanning calorimetry and scanning electron microscopy. In all the tested polyurethanes the peak from the reactive -NCO groups was not observed, which indicates that all the substrates are fully reacted. Such polyurethanes are characterized by interesting properties with the perspective use as components of ceramic-polymer joints endoprosthesis. The designed endoprosthesis should fulfill at least three functions: load bearing function (ceramic core), fastening and stabilizing endoprosthesis to the bone (composite ceramics – biodegradable polymer) and tribologic function allowing mating with parts of the prosthesis (polyurethane layer resistant to abrasive wear).

Modern trends in developing joint endoprostheses

Pinchuk L.

International Journal of Applied Mechanics and Engineering

2002

Vol. 7, Spec. is

35-40

Concepts of approximating endoprostheses to natural joints are stated, namely application of polymer units similar to natural cartilage, generation of electret charge on the polymer members and transformation of the metal unit into a source of magnetic field.