Effect of particle size distribution of dental poly (methyl methacrylate) beads on the microstructure of denture / 中华口腔医学杂志

ABSTRACT

<p><b>OBJECTIVES</b>To investigate the effect of particle size distribution (PSD) of dental poly (methyl methacrylate) (PMMA) beads on the microstructure of denture.</p><p><b>METHODS</b>It was compared and analyzed that the porosity of three groups of spherical specimens which were made of PMMA beads with different PSD at proper polymer/monomer ratios. And the final microstructure of each group was investigated using Digital High Definition Microscope.</p><p><b>RESULTS</b>With proper polymer/monomer ratio increasing, the occurrence of porosity tended to decrease. The final microstructure of denture varied with PSD of PMMA beads.</p><p><b>CONCLUSION</b>By means of optimizing PSD of beads, the microstructure of denture could be improved, and the occurrence of porosity could be reduced.</p>