Science and Education Publishing American Journal of Medical Sciences and Medicine 2327-6657 1 1 2013 08 14 The Effects of Magnetic Resonance Imaging (MRI) on Some Properties of Acrylic Resin Denture Base Materials 62 65 EN Amer A. Taqa Department of Prosthodontic, Dentistry College, Mosul University Ammar Kh. Al-Noori Ahmed Issam Jasum Al-Khyaat AJMSM2013143 10.12691/ajmsm-1-4-3 2013 05 1 2013 08 13 2013 08 14 This study aims to evaluate the effect of MRI on some physical, chemical, and mechanical properties of acrylic resin denture base materials. Four hundred fifty four samples were the total no. of sample, the samples were divided into two groups each group contain two hundred twenty seven, the 1^st sample group were pink and 2^nd groups clear heat cured acrylic resin, then the two groups is divided into four sub-groups, follow that the samples were exposed to magnetic resonance image at three different periods of time (5, 15, 30) minutes within control group respectively and samples tested for rock well, tensile strength surface roughness, water sorption, residual monomer, color change spectrophotometer and dimensional accuracy. The results obtained show that there was a change in the physical properties heat cured acrylic resin weather it is pink or clear after exposure to MRI and this change happened at different levels and variable degree, also it has shown that there was a slight tendency to change the order of an arrangement of atoms of atoms within each molecule with no well and clear evidence of chemically altering of the main material itself, at least at the circumstances of the experiment. The study concluded that the exposure acrylic to MRI at different periods of time lead to altering of physical properties and at different levels of significance.