EFFECT OF IRRADIATION ON ACRYLIC CEMENT WITH SPECIAL REFERENCE TO FIXATION OF PATHOLOGICAL FRACTURES

Polymethylmethacrylate is an excellent adjunct in fixation of pathological fractures. Based upon its mechanical properties, it cannot be substituted for bone; however, when used in conjunction with conventional nail, plate or screw fixation methods, it provides an immediate rigid fixation of some difficult pathological fractures. Tests were undertaken to determine the mechanical properties of two commonly used bone cements; Simplex P Radiopaque and C M W, and the effect, if any, of irradiation upon the acrylic cement. The authors conclude from this study that there was no significant difference in mechanical properties of irradiated and non-irradiated cement and that postoperative irradiation may be safely used after fixation of pathological fractures without fear of adverse effect on the mechanical properties of the cement.