Amer A Taqa
University of Mosul, Iraq
Title: The effect of magnetic resonance imaging (MRI) on some properties of acrylic resin denture base materials
Biography
Biography: Amer A Taqa
Abstract
Introduction: Magnetic resonance imaging have been used nowadays as one of the accepted tool for diagnosis, estimation, and evaluation of many of human diseases; in dentistry, many of prosthodontics patients and "maxillofacial-prosthesis" patients may fall under the category who might be subjected to routine MRI check-up either for follow-up of certain disease or cancer patient for determining the degree of healing or metastasis; thus, there has been growing interest in the research of the possible effect of MRI procedure on different component of dental appliances worn by the patients and one of these components is heat cured acrylic resin.
Aim: The aim of this study is to evaluate the effects of magnetic resonance imaging on mechanical (tensile strength, hardness) physical (color change) chemical (FTIR, NMR) properties at different periods of time exposure.
Materials & Methods: In this study, total 454 samples were prepared from acrylic based heat cured denture material, which were divided into two main groups clear and pink. Each main group was subdivide into 4 groups according to the exposure to MRI control; (5,15 ,30) minute each of the 4 sub-groups underwent different tests like tensile strength, hardness (Rockwell) test, dimensional accuracy test, color change by spectrophotometer, surface roughness, water sorption, residual monomer release by FTIR and NMR.
Results: The results were analyzed by descriptive analysis, analysis of variance, Duncan's multiple range tests and student’s t-test. The results showed that there were changes in the physical properties of heat cured acrylic resin weather it is in pink or clear after exposure to MRI and these changes happened at different levels and variable degrees. It was also shown that there was a slight tendency to change order of arrangement of atoms within each molecular with no well and clear evidence of chemically altering of the main material itself, at least, at circumstances of experiment.