influence of pmma bone cement composition on its mechanical properties

Various compositions of pmma bone cements comprising different quantities of solid phase (bpo, pmma, baso4), liquid phase (mma, hydroquinone, n, n-dimethyl toluidine) and nano-silica filler are prepared according to an experimental design. after complete mixing, the samples are injected into specific molds. then the molds are let to remain in an oven at 37° c for 24 hrs. after that impact and compressive strengths of the samples are obtained. finally fe-sem is utilized to observe the quality of the dispersion of the powder component as well as filler in the cement matrix. the results show that compressive and impact strengths of the samples containing filler are generally lower than the samples without filler. fe-sem micrographs illustrate good dispersion and distribution of the powder component in the matrix but the filler showd only good distribution.