[Effect of particle size distribution of dental poly (methyl methacrylate) beads on the microstructure of denture].
OBJECTIVE
To investigate the effect of particle size distribution (PSD) of dental poly (methyl methacrylate) (PMMA) beads on the microstructure of denture.


METHODS
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.


RESULTS
With proper polymer/monomer ratio increasing, the occurrence of porosity tended to decrease. The final microstructure of denture varied with PSD of PMMA beads.


CONCLUSIONS
By means of optimizing PSD of beads, the microstructure of denture could be improved, and the occurrence of porosity could be reduced.
Yang
Bin
B
Dental Materials Laboratory, Peking University School of Stomatology, Beijing 100081, China.
Wang
Tong
T
Xu
Heng-chang
HC
D003764:Dental Materials / Q000737:chemistry; D003778:Dentures; D010316:Particle Size; D019904:Polymethyl Methacrylate / Q000737:chemistry*
D003764:Dental Materials; D019904:Polymethyl Methacrylate